firefly-linux-kernel-4.4.55.git
12 years agoks8851: Fix missing mutex_lock/unlock
Matt Renzelmann [Fri, 13 Apr 2012 07:59:40 +0000 (07:59 +0000)]
ks8851: Fix missing mutex_lock/unlock

Move the ks8851_rdreg16 call above the call to request_irq and cache
the result for subsequent repeated use.  A spurious interrupt may
otherwise cause a crash.  Thanks to Stephen Boyd, Flavio Leitner, and
Ben Hutchings for feedback.

Signed-off-by: Matt Renzelmann <mjr@cs.wisc.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agodrivers/net/ethernet/xilinx/axi ethernet: Correct Copyright
Michal Simek [Thu, 12 Apr 2012 01:11:12 +0000 (01:11 +0000)]
drivers/net/ethernet/xilinx/axi ethernet: Correct Copyright

Also fix MAINTAINERS file to reflect autorship.

Daniel and Ariane changed coding style but not any functional changes in the driver
itself.

Signed-off-by: Michal Simek <monstr@monstr.eu>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years ago8139cp: set intr mask after its handler is registered
Jason Wang [Wed, 11 Apr 2012 22:10:54 +0000 (22:10 +0000)]
8139cp: set intr mask after its handler is registered

We set intr mask before its handler is registered, this does not work well when
8139cp is sharing irq line with other devices. As the irq could be enabled by
the device before 8139cp's hander is registered which may lead unhandled
irq. Fix this by introducing an helper cp_irq_enable() and call it after
request_irq().

Signed-off-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Flavio Leitner <fbl@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoatl1: fix kernel panic in case of DMA errors
Tony Zelenoff [Wed, 11 Apr 2012 06:15:03 +0000 (06:15 +0000)]
atl1: fix kernel panic in case of DMA errors

Problem:
There was two separate work_struct structures which share one
handler. Unfortunately getting atl1_adapter structure from
work_struct in case of DMA error was done from incorrect
offset which cause kernel panics.

Solution:
The useless work_struct for DMA error removed and
handler name changed to more generic one.

Signed-off-by: Tony Zelenoff <antonz@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoskbuff: struct ubuf_info callback type safety
Michael S. Tsirkin [Mon, 9 Apr 2012 00:24:02 +0000 (00:24 +0000)]
skbuff: struct ubuf_info callback type safety

The skb struct ubuf_info callback gets passed struct ubuf_info
itself, not the arg value as the field name and the function signature
seem to imply. Rename the arg field to ctx to match usage,
add documentation and change the callback argument type
to make usage clear and to have compiler check correctness.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoppp: Fix race condition with queue start/stop
David Woodhouse [Sun, 8 Apr 2012 10:01:44 +0000 (10:01 +0000)]
ppp: Fix race condition with queue start/stop

Commit e675f0cc9a872fd152edc0c77acfed19bf28b81e ("ppp: Don't stop and
restart queue on every TX packet") introduced a race condition which
could leave the net queue stopped even when the channel is no longer
busy. By calling netif_stop_queue() from ppp_start_xmit(), based on the
return value from ppp_xmit_process() but *after* all the locks have been
dropped, we could potentially do so *after* the channel has actually
finished transmitting and attempted to re-wake the queue.

Fix this by moving the netif_stop_queue() into ppp_xmit_process() under
the xmit lock. I hadn't done this previously, because it gets called
from other places than ppp_start_xmit(). But I now think it's the better
option. The net queue *should* be stopped if the channel becomes
congested due to writes from pppd, anyway.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoipv6: fix problem with expired dst cache
Gao feng [Fri, 6 Apr 2012 00:13:10 +0000 (00:13 +0000)]
ipv6: fix problem with expired dst cache

If the ipv6 dst cache which copy from the dst generated by ICMPV6 RA packet.
this dst cache will not check expire because it has no RTF_EXPIRES flag.
So this dst cache will always be used until the dst gc run.

Change the struct dst_entry,add a union contains new pointer from and expires.
When rt6_info.rt6i_flags has no RTF_EXPIRES flag,the dst.expires has no use.
we can use this field to point to where the dst cache copy from.
The dst.from is only used in IPV6.

rt6_check_expired check if rt6_info.dst.from is expired.

ip6_rt_copy only set dst.from when the ort has flag RTF_ADDRCONF
and RTF_DEFAULT.then hold the ort.

ip6_dst_destroy release the ort.

Add some functions to operate the RTF_EXPIRES flag and expires(from) together.
and change the code to use these new adding functions.

Changes from v5:
modify ip6_route_add and ndisc_router_discovery to use new adding functions.

Only set dst.from when the ort has flag RTF_ADDRCONF
and RTF_DEFAULT.then hold the ort.

Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agocaif_hsi: use dev_dbg not dev_err for reporting
Kim Lilliestierna XX [Thu, 12 Apr 2012 08:18:09 +0000 (08:18 +0000)]
caif_hsi: use dev_dbg not dev_err for reporting

Use dev_dbg instead of dev_err for reporting in cfhsi_wakeup_cb.

Signed-off-by: Kim Lilliestierna <kim.xx.lilliestierna@stericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agocaif-hsi: Free flip_buffer at shutdown
sjur.brandeland@stericsson.com [Thu, 12 Apr 2012 08:18:08 +0000 (08:18 +0000)]
caif-hsi: Free flip_buffer at shutdown

Fix memory leak of RX flip-buffer.

Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agocaif: Fix memory leakage in the chnl_net.c.
Tomasz Gregorek [Thu, 12 Apr 2012 08:18:07 +0000 (08:18 +0000)]
caif: Fix memory leakage in the chnl_net.c.

Added kfree_skb() calls in the chnk_net.c file on
the error paths.

Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agol2tp: don't overwrite source address in l2tp_ip_bind()
James Chapman [Tue, 10 Apr 2012 00:10:43 +0000 (00:10 +0000)]
l2tp: don't overwrite source address in l2tp_ip_bind()

Applications using L2TP/IP sockets want to be able to bind() an L2TP/IP
socket to set the local tunnel id while leaving the auto-assigned source
address alone. So if no source address is supplied, don't overwrite
the address already stored in the socket.

Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agol2tp: fix refcount leak in l2tp_ip sockets
James Chapman [Tue, 10 Apr 2012 00:10:42 +0000 (00:10 +0000)]
l2tp: fix refcount leak in l2tp_ip sockets

The l2tp_ip socket close handler does not update the module refcount
correctly which prevents module unload after the first bind() call on
an L2TPv3 IP encapulation socket.

Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonet: Fix misplaced parenthesis in virtio_net.c
Torsten Kaiser [Mon, 9 Apr 2012 05:14:15 +0000 (05:14 +0000)]
net: Fix misplaced parenthesis in virtio_net.c

Commit 2e57b79ccef1ff1422fdf45a9b28fe60f8f084f7 misplaced its
parenthesis and now tx_fifo_errors will only be incremented if an
ENOMEM error is not written to the syslog.

Correct the parenthesis and indentation to the original goal of
counting all non ENOMEM errors and ratelimiting only the messages.

Signed-of-by: Torsten Kaiser <just.for.lkml@googlemail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonet/key/af_key.c: add missing kfree_skb
Julia Lawall [Sun, 8 Apr 2012 22:41:10 +0000 (22:41 +0000)]
net/key/af_key.c: add missing kfree_skb

At the point of this error-handling code, alloc_skb has succeded, so free
the resulting skb by jumping to the err label.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agophonet: Sort out initiailziation and cleanup code.
Eric W. Biederman [Fri, 6 Apr 2012 15:35:39 +0000 (15:35 +0000)]
phonet: Sort out initiailziation and cleanup code.

Recently an oops was reported in phonet if there was a failure during
network namespace creation.

[  163.733755] ------------[ cut here ]------------
[  163.734501] kernel BUG at include/net/netns/generic.h:45!
[  163.734501] invalid opcode: 0000 [#1] PREEMPT SMP
[  163.734501] CPU 2
[  163.734501] Pid: 19145, comm: trinity Tainted: G        W 3.4.0-rc1-next-20120405-sasha-dirty #57
[  163.734501] RIP: 0010:[<ffffffff824d6062>]  [<ffffffff824d6062>] phonet_pernet+0x182/0x1a0
[  163.734501] RSP: 0018:ffff8800674d5ca8  EFLAGS: 00010246
[  163.734501] RAX: 000000003fffffff RBX: 0000000000000000 RCX: ffff8800678c88d8
[  163.734501] RDX: 00000000003f4000 RSI: ffff8800678c8910 RDI: 0000000000000282
[  163.734501] RBP: ffff8800674d5cc8 R08: 0000000000000000 R09: 0000000000000000
[  163.734501] R10: 0000000000000000 R11: 0000000000000000 R12: ffff880068bec920
[  163.734501] R13: ffffffff836b90c0 R14: 0000000000000000 R15: 0000000000000000
[  163.734501] FS:  00007f055e8de700(0000) GS:ffff88007d000000(0000) knlGS:0000000000000000
[  163.734501] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  163.734501] CR2: 00007f055e6bb518 CR3: 0000000070c16000 CR4: 00000000000406e0
[  163.734501] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  163.734501] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[  163.734501] Process trinity (pid: 19145, threadinfo ffff8800674d4000, task ffff8800678c8000)
[  163.734501] Stack:
[  163.734501]  ffffffff824d5f00 ffffffff810e2ec1 ffff880067ae0000 00000000ffffffd4
[  163.734501]  ffff8800674d5cf8 ffffffff824d667a ffff880067ae0000 00000000ffffffd4
[  163.734501]  ffffffff836b90c0 0000000000000000 ffff8800674d5d18 ffffffff824d707d
[  163.734501] Call Trace:
[  163.734501]  [<ffffffff824d5f00>] ? phonet_pernet+0x20/0x1a0
[  163.734501]  [<ffffffff810e2ec1>] ? get_parent_ip+0x11/0x50
[  163.734501]  [<ffffffff824d667a>] phonet_device_destroy+0x1a/0x100
[  163.734501]  [<ffffffff824d707d>] phonet_device_notify+0x3d/0x50
[  163.734501]  [<ffffffff810dd96e>] notifier_call_chain+0xee/0x130
[  163.734501]  [<ffffffff810dd9d1>] raw_notifier_call_chain+0x11/0x20
[  163.734501]  [<ffffffff821cce12>] call_netdevice_notifiers+0x52/0x60
[  163.734501]  [<ffffffff821cd235>] rollback_registered_many+0x185/0x270
[  163.734501]  [<ffffffff821cd334>] unregister_netdevice_many+0x14/0x60
[  163.734501]  [<ffffffff823123e3>] ipip_exit_net+0x1b3/0x1d0
[  163.734501]  [<ffffffff82312230>] ? ipip_rcv+0x420/0x420
[  163.734501]  [<ffffffff821c8515>] ops_exit_list+0x35/0x70
[  163.734501]  [<ffffffff821c911b>] setup_net+0xab/0xe0
[  163.734501]  [<ffffffff821c9416>] copy_net_ns+0x76/0x100
[  163.734501]  [<ffffffff810dc92b>] create_new_namespaces+0xfb/0x190
[  163.734501]  [<ffffffff810dca21>] unshare_nsproxy_namespaces+0x61/0x80
[  163.734501]  [<ffffffff810afd1f>] sys_unshare+0xff/0x290
[  163.734501]  [<ffffffff8187622e>] ? trace_hardirqs_on_thunk+0x3a/0x3f
[  163.734501]  [<ffffffff82665539>] system_call_fastpath+0x16/0x1b
[  163.734501] Code: e0 c3 fe 66 0f 1f 44 00 00 48 c7 c2 40 60 4d 82 be 01 00 00 00 48 c7 c7 80 d1 23 83 e8 48 2a c4 fe e8 73 06 c8 fe 48 85 db 75 0e <0f> 0b 0f 1f 40 00 eb fe 66 0f 1f 44 00 00 48 83 c4 10 48 89 d8
[  163.734501] RIP  [<ffffffff824d6062>] phonet_pernet+0x182/0x1a0
[  163.734501]  RSP <ffff8800674d5ca8>
[  163.861289] ---[ end trace fb5615826c548066 ]---

After investigation it turns out there were two issues.
1) Phonet was not implementing network devices but was using register_pernet_device
   instead of register_pernet_subsys.

   This was allowing there to be cases when phonenet was not initialized and
   the phonet net_generic was not set for a network namespace when network
   device events were being reported on the netdevice_notifier for a network
   namespace leading to the oops above.

2) phonet_exit_net was implementing a confusing and special case of handling all
   network devices from going away that it was hard to see was correct, and would
   only occur when the phonet module was removed.

   Now that unregister_netdevice_notifier has been modified to synthesize unregistration
   events for the network devices that are extant when called this confusing special
   case in phonet_exit_net is no longer needed.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Acked-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonet: In unregister_netdevice_notifier unregister the netdevices.
Eric W. Biederman [Fri, 6 Apr 2012 15:33:35 +0000 (15:33 +0000)]
net: In unregister_netdevice_notifier unregister the netdevices.

We already synthesize events in register_netdevice_notifier and synthesizing
events in unregister_netdevice_notifier allows to us remove the need for
special case cleanup code.

This change should be safe as it adds no new cases for existing callers
of unregiser_netdevice_notifier to handle.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoMerge branch 'akpm' (Andrew's patch-bomb)
Linus Torvalds [Thu, 12 Apr 2012 21:15:21 +0000 (14:15 -0700)]
Merge branch 'akpm' (Andrew's patch-bomb)

Merge fixes from Andrew Morton.

* emailed from Andrew Morton <akpm@linux-foundation.org>: (14 patches)
  panic: fix stack dump print on direct call to panic()
  drivers/rtc/rtc-pl031.c: enable clock on all ST variants
  Revert "mm: vmscan: fix misused nr_reclaimed in shrink_mem_cgroup_zone()"
  hugetlb: fix race condition in hugetlb_fault()
  drivers/rtc/rtc-twl.c: use static register while reading time
  drivers/rtc/rtc-s3c.c: add placeholder for driver private data
  drivers/rtc/rtc-s3c.c: fix compilation error
  MAINTAINERS: add PCDP console maintainer
  memcg: do not open code accesses to res_counter members
  drivers/rtc/rtc-efi.c: fix section mismatch warning
  drivers/rtc/rtc-r9701.c: reset registers if invalid values are detected
  drivers/char/random.c: fix boot id uniqueness race
  memcg: fix broken boolen expression
  memcg: fix up documentation on global LRU

12 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Thu, 12 Apr 2012 21:04:33 +0000 (14:04 -0700)]
Merge git://git./linux/kernel/git/davem/net

Pull networking fixes from David Miller:

 1) Fix bluetooth userland regression reported by Keith Packard, from
    Gustavo Padovan.

 2) Revert ath9k PS idle change, from Sujith Manoharan.

 3) Correct default TCP memory limits (again), from Eric Dumazet.

 4) Fix tcp_rcv_rtt_update() accidental use of unscaled RTT, from Neal
    Cardwell.

 5) We made a facility for layers like wireless to say how much tailroom
    they need in the SKB for link layer stuff such as wireless
    encryption etc., but TCP works hard to fill every SKB out to the end
    defeating this specification.

    This leads to every TCP packet getting reallocated by the wireless
    code in order to have the right amount of tailroom available.

    Fix TCP to only fill SKBs out to the real amount of data area it
    asked for during the allocation, this way it won't eat into the
    slack added for the device's tailroom needs.

    Reported by Marc Merlin and fixed by Eric Dumazet.

 6) Leaks, endian bugs, and new device IDs in bluetooth from Santosh
    Nayak, João Paulo Rechi Vita, Cho, Yu-Chen, Andrei Emeltchenko,
    AceLan Kao, and Andrei Emeltchenko.

 7) OOPS on tty_close fix in bluetooth's hci_ldisc from Johan Hovold.

 8) netfilter erroneously scales TCP window twice, fix from Changli Gao.

 9) Memleak fix in wext-core from Julia Lawall.

10) Consistently handle invalid TCP packets in ipv4 vs.  ipv6 conntrack,
    from Jozsef Kadlecsik.

11) Validate IP header length properly in netfilter conntrack's
    ipv4_get_l4proto().

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (39 commits)
  NFC: Fix the LLCP Tx fragmentation loop
  rtlwifi: Add missing DMA buffer unmapping for PCI drivers
  rtlwifi: Preallocate USB read buffers and eliminate kalloc in read routine
  tcp: avoid order-1 allocations on wifi and tx path
  net: allow pskb_expand_head() to get maximum tailroom
  bridge: Do not send queries on multicast group leaves
  MAINTAINERS: Mark NATSEMI driver as orphan'd.
  tcp: fix tcp_rcv_rtt_update() use of an unscaled RTT sample
  tcp: restore correct limit
  Revert "ath9k: fix going to full-sleep on PS idle"
  rt2x00: Fix rfkill_polling register function.
  bcma: fix build error on MIPS; implicit pcibios_enable_device
  netfilter: nf_conntrack: fix incorrect logic in nf_conntrack_init_net
  netfilter: nf_ct_ipv4: packets with wrong ihl are invalid
  netfilter: nf_ct_ipv4: handle invalid IPv4 and IPv6 packets consistently
  net/wireless/wext-core.c: add missing kfree
  rtlwifi: Fix oops on rate-control failure
  mac80211: Convert WARN_ON to WARN_ON_ONCE
  rtlwifi: rtl8192de: Fix firmware initialization
  nl80211: ensure interface is up in various APIs
  ...

12 years agoMerge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Thu, 12 Apr 2012 20:58:23 +0000 (13:58 -0700)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
 "Mostly exynos and intel.

  Intel has 3 regression fixers (more info in intel merge commit), along
  with some other make hw work fixes, exynos has some cleanups and an
  ioctl fix.

  A couple of radeon fixes, couple of build fixes, and a savage
  userspace interface possible overflow fix."

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (23 commits)
  drm/exynos: fixed exynos broken ioctl
  drm/i915: clear fencing tracking state when retiring requests
  drm/exynos: fix to pointer manager member of struct exynos_drm_subdrv
  drm/exynos: fix struct for operation callback functions to driver name
  drm/exynos: use define instead of default_win member in struct mixer_context
  drm/exynos: rename s/HDMI_OVERLAY_NUMBER/MIXER_WIN_NR
  drm/exynos: remove unused codes in hdmi and mixer
  drm/exynos: remove unnecessary type conversion of hdmi and mixer
  drm/i915: make rc6 module parameter read-only
  drm/i915: implement ColorBlt w/a
  drm/i915/ringbuffer: Exclude last 2 cachlines of ring on 845g
  Revert "drm/i915: reenable gmbus on gen3+ again"
  drm/radeon: only add the mm i2c bus if the hw_i2c module param is set
  vgaarb.h: fix build warnings
  drm/i915: properly compute dp dithering for user-created modes
  drm/radeon/kms: fix DVO setup on some r4xx chips
  drm/savage: fix integer overflows in savage_bci_cmdbuf()
  drm/radeon: replace udelay with mdelay for long timeouts
  drm/i915: Finish any pending operations on the framebuffer before disabling
  drm/i915: Removed IVB forced enable of sprite dest key.
  ...

12 years agoMerge tag 'md-3.4-fixes' of git://neil.brown.name/md
Linus Torvalds [Thu, 12 Apr 2012 20:12:56 +0000 (13:12 -0700)]
Merge tag 'md-3.4-fixes' of git://neil.brown.name/md

Pull a few more fixes for md from NeilBrown:
 "Two are tagged for -stable.  They can cause an oops, but very rarely."

* tag 'md-3.4-fixes' of git://neil.brown.name/md:
  md/bitmap: prevent bitmap_daemon_work running while initialising bitmap
  md/raid1,raid10: Fix calculation of 'vcnt' when processing error recovery.
  MD: Bitmap version cleanup.

12 years agopanic: fix stack dump print on direct call to panic()
Jason Wessel [Thu, 12 Apr 2012 19:49:17 +0000 (12:49 -0700)]
panic: fix stack dump print on direct call to panic()

Commit 6e6f0a1f0fa6 ("panic: don't print redundant backtraces on oops")
causes a regression where no stack trace will be printed at all for the
case where kernel code calls panic() directly while not processing an
oops, and of course there are 100's of instances of this type of call.

The original commit executed the check (!oops_in_progress), but this will
always be false because just before the dump_stack() there is a call to
bust_spinlocks(1), which does the following:

  void __attribute__((weak)) bust_spinlocks(int yes)
  {
if (yes) {
++oops_in_progress;

The proper way to resolve the problem that original commit tried to
solve is to avoid printing a stack dump from panic() when the either of
the following conditions is true:

  1) TAINT_DIE has been set (this is done by oops_end())
     This indicates and oops has already been printed.
  2) oops_in_progress > 1
     This guards against the rare case where panic() is invoked
     a second time, or in between oops_begin() and oops_end()

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: <stable@vger.kernel.org> [3.3+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agodrivers/rtc/rtc-pl031.c: enable clock on all ST variants
Linus Walleij [Thu, 12 Apr 2012 19:49:16 +0000 (12:49 -0700)]
drivers/rtc/rtc-pl031.c: enable clock on all ST variants

The ST variants of the PL031 all require bit 26 in the control register
to be set before they work properly.  Discovered this when testing on
the Nomadik board where it would suprisingly just stand still.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
Cc: Alessandro Rubini <rubini@unipv.it>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoRevert "mm: vmscan: fix misused nr_reclaimed in shrink_mem_cgroup_zone()"
Ying Han [Thu, 12 Apr 2012 19:49:16 +0000 (12:49 -0700)]
Revert "mm: vmscan: fix misused nr_reclaimed in shrink_mem_cgroup_zone()"

This reverts commit c38446cc65e1f2b3eb8630c53943b94c4f65f670.

Before the commit, the code makes senses to me but not after the commit.
The "nr_reclaimed" is the number of pages reclaimed by scanning through
the memcg's lru lists.  The "nr_to_reclaim" is the target value for the
whole function.  For example, we like to early break the reclaim if
reclaimed 32 pages under direct reclaim (not DEF_PRIORITY).

After the reverted commit, the target "nr_to_reclaim" is decremented each
time by "nr_reclaimed" but we still use it to compare the "nr_reclaimed".
It just doesn't make sense to me...

Signed-off-by: Ying Han <yinghan@google.com>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Hillf Danton <dhillf@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agohugetlb: fix race condition in hugetlb_fault()
Chris Metcalf [Thu, 12 Apr 2012 19:49:15 +0000 (12:49 -0700)]
hugetlb: fix race condition in hugetlb_fault()

The race is as follows:

Suppose a multi-threaded task forks a new process (on cpu A), thus
bumping up the ref count on all the pages.  While the fork is occurring
(and thus we have marked all the PTEs as read-only), another thread in
the original process (on cpu B) tries to write to a huge page, taking an
access violation from the write-protect and calling hugetlb_cow().  Now,
suppose the fork() fails.  It will undo the COW and decrement the ref
count on the pages, so the ref count on the huge page drops back to 1.
Meanwhile hugetlb_cow() also decrements the ref count by one on the
original page, since the original address space doesn't need it any
more, having copied a new page to replace the original page.  This
leaves the ref count at zero, and when we call unlock_page(), we panic.

fork on CPU A fault on CPU B
============= ==============
...
down_write(&parent->mmap_sem);
down_write_nested(&child->mmap_sem);
...
while duplicating vmas
if error
break;
...
up_write(&child->mmap_sem);
up_write(&parent->mmap_sem); ...
down_read(&parent->mmap_sem);
...
lock_page(page);
handle COW
page_mapcount(old_page) == 2
alloc and prepare new_page
...
handle error
page_remove_rmap(page);
put_page(page);
...
fold new_page into pte
page_remove_rmap(page);
put_page(page);
...
oops ==> unlock_page(page);
up_read(&parent->mmap_sem);

The solution is to take an extra reference to the page while we are
holding the lock on it.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Cc: Hillf Danton <dhillf@gmail.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agodrivers/rtc/rtc-twl.c: use static register while reading time
Konstantin Shlyakhovoy [Thu, 12 Apr 2012 19:49:15 +0000 (12:49 -0700)]
drivers/rtc/rtc-twl.c: use static register while reading time

RTC stores time and date in several registers.  Due to the fact that
these registers can't be read instantaneously, there is a chance that
reading from counting registers gives an error of one minute, one hour,
one day, etc.

To address this issue, the RTC has hardware support to copy the RTC
counting registers to static shadowed registers.  The current
implementation does not use this feature, and in a stress test, we can
reproduce this error at a rate of around two times per 300000 readings.

Fix the implementation to ensure that the right snapshot of time is
captured.

Signed-off-by: Konstantin Shlyakhovoy <x0155534@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Benoit Cousson <b-cousson@ti.com>
Cc: linux-omap <linux-omap@vger.kernel.org>
Acked-by: Mykola Oleksiienko <x0174904@ti.com>
Acked-by: Oleksandr Dmytryshyn <oleksandr.dmytryshyn@ti.com>
Acked-by: Graeme Gregory <gg@slimlogic.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agodrivers/rtc/rtc-s3c.c: add placeholder for driver private data
Tushar Behera [Thu, 12 Apr 2012 19:49:14 +0000 (12:49 -0700)]
drivers/rtc/rtc-s3c.c: add placeholder for driver private data

Driver data field is a pointer, hence assigning that to an integer results
in compilation warnings.

Fixes following compilation warnings:

  drivers/rtc/rtc-s3c.c: In function `s3c_rtc_get_driver_data':
  drivers/rtc/rtc-s3c.c:452:3: warning: return makes integer from pointer without a cast [enabled by default]
  drivers/rtc/rtc-s3c.c: At top level:
  drivers/rtc/rtc-s3c.c:674:3: warning: initialization makes pointer from integer without a cast [enabled by default]
  drivers/rtc/rtc-s3c.c:674:3: warning: (near initialization for `s3c_rtc_dt_match[1].data') [enabled by default]
  drivers/rtc/rtc-s3c.c:677:3: warning: initialization makes pointer from integer without a cast [enabled by default]
  drivers/rtc/rtc-s3c.c:677:3: warning: (near initialization for `s3c_rtc_dt_match[2].data') [enabled by default]
  drivers/rtc/rtc-s3c.c:680:3: warning: initialization makes pointer from integer without a cast [enabled by default]
  drivers/rtc/rtc-s3c.c:680:3: warning: (near initialization for `s3c_rtc_dt_match[3].data') [enabled by default]

Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Cc: Heiko Stuebner <heiko@sntech.de>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agodrivers/rtc/rtc-s3c.c: fix compilation error
Tushar Behera [Thu, 12 Apr 2012 19:49:14 +0000 (12:49 -0700)]
drivers/rtc/rtc-s3c.c: fix compilation error

Fix this error:

  drivers/rtc/rtc-s3c.c: At top level:
  drivers/rtc/rtc-s3c.c:671:3: error: request for member `data' in something not a structure or union
  drivers/rtc/rtc-s3c.c:674:3: error: request for member `data' in something not a structure or union
  drivers/rtc/rtc-s3c.c:677:3: error: request for member `data' in something not a structure or union
  drivers/rtc/rtc-s3c.c:680:3: error: request for member `data' in something not a structure or union

Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Cc: Heiko Stuebner <heiko@sntech.de>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoMAINTAINERS: add PCDP console maintainer
Khalid Aziz [Thu, 12 Apr 2012 19:49:13 +0000 (12:49 -0700)]
MAINTAINERS: add PCDP console maintainer

Add missing maintainer info for PCDP console code.

Signed-off-by: Khalid Aziz <khalid.aziz@hp.com>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agomemcg: do not open code accesses to res_counter members
Glauber Costa [Thu, 12 Apr 2012 19:49:13 +0000 (12:49 -0700)]
memcg: do not open code accesses to res_counter members

We should use the accessor res_counter_read_u64 for that.

Although a purely cosmetic change is sometimes better delayed, to avoid
conflicting with other people's work, we are starting to have people
touching this code as well, and reproducing the open code behavior
because that's the standard =)

Time to fix it, then.

Signed-off-by: Glauber Costa <glommer@parallels.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agodrivers/rtc/rtc-efi.c: fix section mismatch warning
Jan Beulich [Thu, 12 Apr 2012 19:49:12 +0000 (12:49 -0700)]
drivers/rtc/rtc-efi.c: fix section mismatch warning

efi_rtc_init() uses platform_driver_probe(), so there's no need to also
set efi_rtc_driver's probe member (as it won't be used anyway).  This
fixes a modpost section mismatch warning (as efi_rtc_probe() validly is
__init).

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agodrivers/rtc/rtc-r9701.c: reset registers if invalid values are detected
Andreas Dumberger [Thu, 12 Apr 2012 19:49:12 +0000 (12:49 -0700)]
drivers/rtc/rtc-r9701.c: reset registers if invalid values are detected

hwclock refuses to set date/time if RTC registers contain invalid
values.  Check the date/time register values at probe time and
initialize them to make hwclock happy.

Signed-off-by: Andreas Dumberger <andreas.dumberger@tqs.de>
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agodrivers/char/random.c: fix boot id uniqueness race
Mathieu Desnoyers [Thu, 12 Apr 2012 19:49:12 +0000 (12:49 -0700)]
drivers/char/random.c: fix boot id uniqueness race

/proc/sys/kernel/random/boot_id can be read concurrently by userspace
processes.  If two (or more) user-space processes concurrently read
boot_id when sysctl_bootid is not yet assigned, a race can occur making
boot_id differ between the reads.  Because the whole point of the boot id
is to be unique across a kernel execution, fix this by protecting this
operation with a spinlock.

Given that this operation is not frequently used, hitting the spinlock
on each call should not be an issue.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Matt Mackall <mpm@selenic.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Greg Kroah-Hartman <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agomemcg: fix broken boolen expression
Kirill A. Shutemov [Thu, 12 Apr 2012 19:49:11 +0000 (12:49 -0700)]
memcg: fix broken boolen expression

action != CPU_DEAD || action != CPU_DEAD_FROZEN is always true.

Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agomemcg: fix up documentation on global LRU
Ying Han [Thu, 12 Apr 2012 19:49:10 +0000 (12:49 -0700)]
memcg: fix up documentation on global LRU

In v3.3-rc1, the global LRU was removed in commit 925b7673cce3 ("mm:
make per-memcg LRU lists exclusive").  The patch fixes up the memcg
docs.

I left the swap session to someone who has better understanding of
'memory+swap'.

Signed-off-by: Ying Han <yinghan@google.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoMerge tag 'irqdomain-for-linus' of git://git.secretlab.ca/git/linux-2.6
Linus Torvalds [Thu, 12 Apr 2012 19:49:56 +0000 (12:49 -0700)]
Merge tag 'irqdomain-for-linus' of git://git.secretlab.ca/git/linux-2.6

Pull irqdomain bug fixes from Grant Likely:
 "This branch fixes a bug in irq_create_mapping() where an error return
  from irq_alloc_desc_from() gets ignored.

  It also removes irq_virq_count to fix a bug on powerpc where the
  irqdomain code does not find irqs allocated above the CONFIG_NR_IRQS
  boundary.

  The remaining patches get rid of an completely pointless export and
  fix some minor bugs in the irqdomain debug output."

* tag 'irqdomain-for-linus' of git://git.secretlab.ca/git/linux-2.6:
  irq_domain: Move irq_virq_count into NOMAP revmap
  irqdomain: Fix debugfs formatting
  irq_domain: correct the debugfs file name
  irq: Kill pointless irqd_to_hw export
  irq/irq_domain: Quit ignoring error returns from irq_alloc_desc_from().

12 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Linus Torvalds [Thu, 12 Apr 2012 19:49:07 +0000 (12:49 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input

Pull input updates from Dmitry Torokhov:
 "Just a few small fixes..."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: da9052 - fix memory leak in da9052_onkey_probe()
  Input: gpio_mouse - use linux/gpio.h rather than asm/gpio.h
  Input: trackpoint - use psmouse_fmt() for messages
  Input: elantech - v4 is a clickpad, with only one button
  Input: elantech - reset touchpad before configuring it
  Input: sentelic - filter taps in absolute mode
  Input: tps6507x-ts - fix MODULE_ALIAS to match driver name

12 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Linus Torvalds [Thu, 12 Apr 2012 19:07:39 +0000 (12:07 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs

Pull vfs fixes from Al Viro:
 "Regression fix in mtdchar_open(), fix for a really old leak
  (almost never hit in practice - it's a b0rken failure exit in
  simple_fill_super()) and a typo fix in vfs.txt (misspelled
  method type)."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  typo fix in Documentation/filesystems/vfs.txt
  dentry leak in simple_fill_super() failure exit
  fix breakage in mtdchar_open(), sanitize failure exits

12 years agoMerge branch 'exynos-drm-fixes' of git://git.infradead.org/users/kmpark/linux-samsung...
Dave Airlie [Thu, 12 Apr 2012 16:42:01 +0000 (17:42 +0100)]
Merge branch 'exynos-drm-fixes' of git://git.infradead.org/users/kmpark/linux-samsung into drm-intel-fixes

* 'exynos-drm-fixes' of git://git.infradead.org/users/kmpark/linux-samsung:
  drm/exynos: fixed exynos broken ioctl
  drm/exynos: fix to pointer manager member of struct exynos_drm_subdrv
  drm/exynos: fix struct for operation callback functions to driver name
  drm/exynos: use define instead of default_win member in struct mixer_context
  drm/exynos: rename s/HDMI_OVERLAY_NUMBER/MIXER_WIN_NR
  drm/exynos: remove unused codes in hdmi and mixer
  drm/exynos: remove unnecessary type conversion of hdmi and mixer
  drm/exynos: add format list of plane
  drm/exynos: fixed duplicated page allocation bug.
  drm/exynos: fixed page align and code clean.

12 years agoMerge branch 'drm-intel-fixes' of git://people.freedesktop.org/~danvet/drm-intel...
Dave Airlie [Thu, 12 Apr 2012 12:01:57 +0000 (13:01 +0100)]
Merge branch 'drm-intel-fixes' of git://people.freedesktop.org/~danvet/drm-intel into drm-intel-fixes

Daniel Vetter writes:
3 regression fixes:
- disable gmbus again, too broken for 3.4, we'll try again for 3.5
- dp bandwidth computation fix, we've lost the 6bpc dithering flag
 sometimes, this is a 3.3 regression (maybe even earlier for some
 configurations).
- fix resume regression caused by the gen2/3 fencing fix merged into -rc2.

And a few other fixes:
- gpu hang fix for i845 (Chris)
- sprite fix (Armin Reese)
- crtc disable vs. scanlinewait race fix (Chris)
- rc6 module option read-only, it confused testers (Jesse)
- fbc related blitter death hw workaround, note that we disable fbc on snb
 by default anyway.

With these fixes we have one 3.4 regression outstanding: One of the
cleanup patches for the interlaced support managed to confuse the lvds
panel fitter when upscaling. The root-cause is still unclear, but test
patches are awaiting feedback from the reporter.

* 'drm-intel-fixes' of git://people.freedesktop.org/~danvet/drm-intel:
  drm/i915: clear fencing tracking state when retiring requests
  drm/i915: make rc6 module parameter read-only
  drm/i915: implement ColorBlt w/a
  drm/i915/ringbuffer: Exclude last 2 cachlines of ring on 845g
  Revert "drm/i915: reenable gmbus on gen3+ again"
  drm/i915: properly compute dp dithering for user-created modes
  drm/i915: Finish any pending operations on the framebuffer before disabling
  drm/i915: Removed IVB forced enable of sprite dest key.

12 years agoMerge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
John W. Linville [Thu, 12 Apr 2012 13:55:22 +0000 (09:55 -0400)]
Merge branch 'master' of git://git./linux/kernel/git/linville/wireless into for-davem

12 years agodrm/exynos: fixed exynos broken ioctl
Inki Dae [Thu, 12 Apr 2012 07:42:54 +0000 (16:42 +0900)]
drm/exynos: fixed exynos broken ioctl

this patch removes the pointer of uint64_t *edid. it should be just
a uint64_t.

Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
12 years agodrm/i915: clear fencing tracking state when retiring requests
Daniel Vetter [Wed, 11 Apr 2012 23:27:57 +0000 (01:27 +0200)]
drm/i915: clear fencing tracking state when retiring requests

This fixes a resume regression introduced in

commit 7dd4906586274f3945f2aeaaa5a33b451c3b4bba
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Wed Mar 21 10:48:18 2012 +0000

    drm/i915: Mark untiled BLT commands as fenced on gen2/3

which fixed fencing tracking for untiled blt commands.

A side effect of that patch was that now also untiled objects have a
non-zero obj->last_fenced_seqno to track when a fence can be set up
after a pipelined tiling change. Unfortunately this was only cleared
by the fence setup and teardown code, resulting in tons of untiled but
inactive objects with non-zero last_fenced_seqno.

Now after resume we completely reset the seqno tracking, both on the
driver side (by setting dev_priv->next_seqno = 1) and on the hw side
(by allocating a new hws page, which contains the seqnos). Hilarity
and indefinite waits ensued from the stale seqnos in
obj->last_fenced_seqno from before the suspend.

The fix is to properly clear the fencing tracking state like we
already do for the normal gpu rendering while moving objects off the
active list.

Reported-and-tested-by: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Jiri Slaby <jslaby@suse.cz>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
12 years agoirq_domain: Move irq_virq_count into NOMAP revmap
Grant Likely [Wed, 15 Feb 2012 22:06:08 +0000 (15:06 -0700)]
irq_domain: Move irq_virq_count into NOMAP revmap

This patch replaces the old global setting of irq_virq_count that is only
used by the NOMAP mapping and instead uses a revmap_data property so that
the maximum NOMAP allocation can be set per NOMAP irq_domain.

There is exactly one user of irq_virq_count in-tree right now: PS3.
Also, irq_virq_count is only useful for the NOMAP mapping.  So,
instead of having a single global irq_virq_count values, this change
drops it entirely and added a max_irq argument to irq_domain_add_nomap().
That makes it a property of an individual nomap irq domain instead of
a global system settting.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Tested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Milton Miller <miltonm@bga.com>
12 years agomd/bitmap: prevent bitmap_daemon_work running while initialising bitmap
NeilBrown [Thu, 12 Apr 2012 06:05:06 +0000 (16:05 +1000)]
md/bitmap: prevent bitmap_daemon_work running while initialising bitmap

If a bitmap is added while the array is active, it is possible
for bitmap_daemon_work to run while the bitmap is being
initialised.
This is particularly a problem if bitmap_daemon_work sees
bitmap->filemap as non-NULL before it has been filled in properly.
So hold bitmap_info.mutex while filling in ->filemap
to prevent problems.

This patch is suitable for any -stable kernel, though it might not
apply cleanly before about 3.1.

Cc: stable@vger.kernel.org
Signed-off-by: NeilBrown <neilb@suse.de>
12 years agomd/raid1,raid10: Fix calculation of 'vcnt' when processing error recovery.
majianpeng [Thu, 12 Apr 2012 06:04:47 +0000 (16:04 +1000)]
md/raid1,raid10: Fix calculation of 'vcnt' when processing error recovery.

If r1bio->sectors % 8 != 0,then the memcmp and a later
memcpy will omit the last bio_vec.

This is suitable for any stable kernel since 3.1 when bad-block
management was introduced.

Cc: stable@vger.kernel.org
Signed-off-by: majianpeng <majianpeng@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
12 years agoMD: Bitmap version cleanup.
Andrei Warkentin [Thu, 12 Apr 2012 05:55:21 +0000 (15:55 +1000)]
MD: Bitmap version cleanup.

bitmap_new_disk_sb() would still create V3 bitmap superblock
with host-endian layout.

Perhaps I'm confused, but shouldn't bitmap_new_disk_sb() be
creating a V4 bitmap superblock instead, that is portable,
as per comment in bitmap.h?

Signed-off-by: Andrei Warkentin <andrey.warkentin@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
12 years agodrm/exynos: fix to pointer manager member of struct exynos_drm_subdrv
Joonyoung Shim [Thu, 5 Apr 2012 11:49:27 +0000 (20:49 +0900)]
drm/exynos: fix to pointer manager member of struct exynos_drm_subdrv

The struct exynos_drm_manager has to exist for exynos drm sub driver
using encoder and connector. If it isn't NULL to member of struct
exynos_drm_subdrv, will create encoder and connector else will not. And
the is_local member also doesn't need.

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
12 years agodrm/exynos: fix struct for operation callback functions to driver name
Joonyoung Shim [Thu, 5 Apr 2012 11:49:26 +0000 (20:49 +0900)]
drm/exynos: fix struct for operation callback functions to driver name

The mixer driver and hdmi driver have each operation callback functions
and they is registered to hdmi common driver. Their struct names in hdmi
common driver include display, manager and overlay. It confuses to
appear whose operation and two driver cannot register same operation
callback functions at the same time. Use their struct names to driver
name.

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
12 years agodrm/exynos: use define instead of default_win member in struct mixer_context
Joonyoung Shim [Thu, 5 Apr 2012 11:49:25 +0000 (20:49 +0900)]
drm/exynos: use define instead of default_win member in struct mixer_context

The default_win member in struct mixer_context isn't change its value
after initialized to 0, so it's better using to define.

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
12 years agodrm/exynos: rename s/HDMI_OVERLAY_NUMBER/MIXER_WIN_NR
Joonyoung Shim [Thu, 5 Apr 2012 11:49:24 +0000 (20:49 +0900)]
drm/exynos: rename s/HDMI_OVERLAY_NUMBER/MIXER_WIN_NR

HDMI_OVERLAY_NUMBER is specific of mixer driver and be used "windows
layer" term in exynos user manaual, so rename it.

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
12 years agodrm/exynos: remove unused codes in hdmi and mixer
Joonyoung Shim [Thu, 5 Apr 2012 11:49:23 +0000 (20:49 +0900)]
drm/exynos: remove unused codes in hdmi and mixer

Some members in struct mixer_context aren't used and the define
HDMI_OVERLAY_NUMBER is unused in hdmi driver, remove them.

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
12 years agodrm/exynos: remove unnecessary type conversion of hdmi and mixer
Joonyoung Shim [Thu, 5 Apr 2012 11:49:22 +0000 (20:49 +0900)]
drm/exynos: remove unnecessary type conversion of hdmi and mixer

When the void pointer type variable is assigned to the specific pointer
type variable, don't need to do type conversion.

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
12 years agoInput: da9052 - fix memory leak in da9052_onkey_probe()
Jesper Juhl [Thu, 12 Apr 2012 03:55:18 +0000 (20:55 -0700)]
Input: da9052 - fix memory leak in da9052_onkey_probe()

If, in drivers/input/misc/da9052_onkey.c::da9052_onkey_probe(), the
call to either kzalloc() or input_allocate_device() fails then we will
return -ENOMEM from the function without freeing the other allocation
that may have succeeded, thus we leak either the memory allocated for
'onkey' or the memory allocated for 'input_dev' if one succeeds and
the other fails.
Fix that by jumping to the 'err_free_mem' label at the end of the
function that properly cleans up rather than returning directly.

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
12 years agoMerge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
Linus Torvalds [Thu, 12 Apr 2012 03:56:28 +0000 (20:56 -0700)]
Merge branch 'merge' of git://git./linux/kernel/git/benh/powerpc

Pull powerpc fixes from Benjamin Herrenschmidt:
 "Fixes for two nasty regression affecting powerpc in 3.4."

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  powerpc: Fix typo in runlatch code
  powerpc: Fix page fault with lockdep regression

12 years agoMerge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland...
Linus Torvalds [Wed, 11 Apr 2012 20:24:52 +0000 (13:24 -0700)]
Merge tag 'rdma-for-linus' of git://git./linux/kernel/git/roland/infiniband

Pull infiniband fixes from Roland Dreier:
 "Fix a regression in the /sys/class/infiniband/.../rate attribute --
  old kernels used to just return something, even if the underlying
  value was out-of-bounds, while 3.4-rc1 returned EINVAL to userspace.
  This breaks some applications that check for the error, so go back to
  the old behavior."

* tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
  IB/core: Don't return EINVAL from sysfs rate attribute for invalid speeds
  IB/mlx4: Don't return an invalid speed when a port is down

12 years agodrm/i915: make rc6 module parameter read-only
Jesse Barnes [Wed, 11 Apr 2012 16:39:02 +0000 (09:39 -0700)]
drm/i915: make rc6 module parameter read-only

People have been getting confused and thinking this is a runtime control.

Cc: stable@vger.kernel.org
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
12 years agoNFC: Fix the LLCP Tx fragmentation loop
Samuel Ortiz [Tue, 10 Apr 2012 17:43:03 +0000 (19:43 +0200)]
NFC: Fix the LLCP Tx fragmentation loop

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
12 years agortlwifi: Add missing DMA buffer unmapping for PCI drivers
Larry Finger [Mon, 26 Mar 2012 15:48:20 +0000 (10:48 -0500)]
rtlwifi: Add missing DMA buffer unmapping for PCI drivers

In https://bugzilla.kernel.org/show_bug.cgi?id=42976, a system with driver
rtl8192se used as an AP suffers from "Out of SW-IOMMU space" errors. These
are caused by the DMA buffers used for beacons never being unmapped.

This bug was also reported at
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/961618

Reported-and-Tested-by: Da Xue <da@lessconfused.com>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Stable <stable@vger.kernel.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
12 years agortlwifi: Preallocate USB read buffers and eliminate kalloc in read routine
Larry Finger [Mon, 19 Mar 2012 20:44:31 +0000 (15:44 -0500)]
rtlwifi: Preallocate USB read buffers and eliminate kalloc in read routine

The current version of rtlwifi for USB operations uses kmalloc to
acquire a 32-bit buffer for each read of the device. When
_usb_read_sync() is called with the rcu_lock held, the result is
a "sleeping function called from invalid context" BUG. This is
reported for two cases in https://bugzilla.kernel.org/show_bug.cgi?id=42775.
The first case has the lock originating from within rtlwifi and could
be fixed by rearranging the locking; however, the second originates from
within mac80211. The kmalloc() call is removed from _usb_read_sync()
by creating a ring buffer pointer in the private area and
allocating the buffer data in the probe routine.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Stable <stable@vger.kernel.org> [This version good for 3.3+ - different patch for 3.2 - 2.6.39]
Signed-off-by: John W. Linville <linville@tuxdriver.com>
12 years agoMerge branch 'stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux...
Linus Torvalds [Wed, 11 Apr 2012 18:08:20 +0000 (11:08 -0700)]
Merge branch 'stable' of git://git./linux/kernel/git/cmetcalf/linux-tile

Pull arch/tile fixes from Chris Metcalf:
 "This is one important change from Srivatsa Bhat that got dropped when
  I put together my pull request for -rc2, plus a trivial change to
  remove a compiler warning."

* 'stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
  arch/tile: avoid unused variable warning in proc.c for tilegx
  tile/CPU hotplug: Add missing call to notify_cpu_starting()

12 years agoMerge tag 'sound-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Linus Torvalds [Wed, 11 Apr 2012 18:07:38 +0000 (11:07 -0700)]
Merge tag 'sound-3.4' of git://git./linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 - A series of fixes for Conexant 20549 HD-audio codec chip
 - A workaround for HDMI hotplug debug prints that annoyed people
 - A fix for the new support of platform DAPM contexts
 - Many driver-specific minor fixes

* tag 'sound-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda - hide HDMI/ELD printks unless snd.debug=2
  ALSA: sound/isa/sscape.c: add missing resource-release code
  sound: sound/oss/msnd_pinnacle.c: add vfrees
  ALSA: hda - clean up CX20549 test mixer setup
  ALSA: hda - CX20549 doesn't need pin_amp_workaround.
  ALSA: hda - Remove CD control from model=benq for CX20549
  ALSA: hda - fix record volume controls of CX20459 ("Venice")
  ALSA: hda - Rename capture sources of CX20549 to match common conventions
  ALSA: hda - Fix proc output for ADC amp values of CX20549
  ASoC: tegra: fix i2s compilation when !CONFIG_DEBUG_FS
  ASoC: set idle_bias_off=1 for all platform DAPM contexts
  ASoC: imx-audmux: Check for NULL pointer
  ASoC: imx-audmux: Fix ssi port numbers in sysfs
  ASoC: ak4642: fixup: mute needs +1 step
  MAINTAINERS: Don't list everyone working on Wolfson drivers
  MAINTAINERS: Add missing ASoC OMAP co-maintainer
  ASoC: pxa: pxa2xx-i2s: add io.h for IOMEM macro
  ASoC: tegra: ensure clocks are enabled when touching registers
  ASoC: sgtl5000: Enable VAG when DAC/ADC up
  ALSA: asihpi - fix return value of hpios_locked_mem_alloc()

12 years agoMerge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
Linus Torvalds [Wed, 11 Apr 2012 18:05:34 +0000 (11:05 -0700)]
Merge branch 'v4l_for_linus' of git://git./linux/kernel/git/mchehab/linux-media

Pull media fixes from Mauro Carvalho Chehab:

 - dvb core: there is a regression found when used with xine.  For
   whatever unknown reason, xine (and xine-lib clients) wants that the
   frontend to tell what frequency he is using even before the PLL lock
   (or at least, it expects a non-zero frequency).

   On DVB, the frequency is only actually known after a frequency
   zig-zag seek, done by the DVB core.  Anyway, the fix was trivial.
   That solves Fedora BZ#808871.

 - ivtv: fix a regression when selecting the language channel

 - uvc: fix a race-related crash

 - it913x: fixes firmware loading

 - two trivial patches (a dependency issue at a radio driver at sound
   Kconfig, and a warning fix on dvb).

* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
  [media] uvcvideo: Fix race-related crash in uvc_video_clock_update()
  [media] Drivers/media/radio: Fix build error
  [media] dvb_frontend: fix compiler warning
  [media] it913x: fix firmware loading errors
  [media] ivtv: Fix AUDIO_(BILINGUAL_)CHANNEL_SELECT regression
  [media] dvb_frontend: regression fix: userspace ABI broken for xine

12 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-fixes
Linus Torvalds [Wed, 11 Apr 2012 18:04:45 +0000 (11:04 -0700)]
Merge git://git./linux/kernel/git/steve/gfs2-3.0-fixes

Pull GFS2 fixes from Steven Whitehouse

* git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-fixes:
  GFS2: Allow caching of rindex glock
  GFS2: Make sure rindex is uptodate before starting transactions
  GFS2: use depends instead of select in kconfig
  GFS2: put glock reference in error patch of read_rindex_entry

12 years agoarch/tile: avoid unused variable warning in proc.c for tilegx
Chris Metcalf [Wed, 11 Apr 2012 16:45:20 +0000 (12:45 -0400)]
arch/tile: avoid unused variable warning in proc.c for tilegx

Until we push the unaligned access support for tilegx, it's silly
to have arch/tile/kernel/proc.c generate a warning about an unused
variable.  Extend the #ifdef to cover all the code and data for now.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
12 years agox86: merge 32/64-bit versions of 'strncpy_from_user()' and speed it up
Linus Torvalds [Fri, 6 Apr 2012 21:32:32 +0000 (14:32 -0700)]
x86: merge 32/64-bit versions of 'strncpy_from_user()' and speed it up

This merges the 32- and 64-bit versions of the x86 strncpy_from_user()
by just rewriting it in C rather than the ancient inline asm versions
that used lodsb/stosb and had been duplicated for (trivial) differences
between the 32-bit and 64-bit versions.

While doing that, it also speeds them up by doing the accesses a word at
a time.  Finally, the new routines also properly handle the case of
hitting the end of the address space, which we have never done correctly
before (fs/namei.c has a hack around it for that reason).

Despite all these improvements, it actually removes more lines than it
adds, due to the de-duplication.  Also, we no longer export (or define)
the legacy __strncpy_from_user() function (that was defined to not do
the user permission checks), since it's not actually used anywhere, and
the user address space checks are built in to the new code.

Other architecture maintainers have been notified that the old hack in
fs/namei.c will be going away in the 3.5 merge window, in case they
copied the x86 approach of being a bit cavalier about the end of the
address space.

Cc: linux-arch@vger.kernel.org
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Anvin" <hpa@zytor.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agocred: copy_process() should clear child->replacement_session_keyring
Oleg Nesterov [Mon, 9 Apr 2012 19:03:50 +0000 (21:03 +0200)]
cred: copy_process() should clear child->replacement_session_keyring

keyctl_session_to_parent(task) sets ->replacement_session_keyring,
it should be processed and cleared by key_replace_session_keyring().

However, this task can fork before it notices TIF_NOTIFY_RESUME and
the new child gets the bogus ->replacement_session_keyring copied by
dup_task_struct(). This is obviously wrong and, if nothing else, this
leads to put_cred(already_freed_cred).

change copy_creds() to clear this member. If copy_process() fails
before this point the wrong ->replacement_session_keyring doesn't
matter, exit_creds() won't be called.

Cc: <stable@vger.kernel.org>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agotcp: avoid order-1 allocations on wifi and tx path
Eric Dumazet [Tue, 10 Apr 2012 20:30:48 +0000 (20:30 +0000)]
tcp: avoid order-1 allocations on wifi and tx path

Marc Merlin reported many order-1 allocations failures in TX path on its
wireless setup, that dont make any sense with MTU=1500 network, and non
SG capable hardware.

After investigation, it turns out TCP uses sk_stream_alloc_skb() and
used as a convention skb_tailroom(skb) to know how many bytes of data
payload could be put in this skb (for non SG capable devices)

Note : these skb used kmalloc-4096 (MTU=1500 + MAX_HEADER +
sizeof(struct skb_shared_info) being above 2048)

Later, mac80211 layer need to add some bytes at the tail of skb
(IEEE80211_ENCRYPT_TAILROOM = 18 bytes) and since no more tailroom is
available has to call pskb_expand_head() and request order-1
allocations.

This patch changes sk_stream_alloc_skb() so that only
sk->sk_prot->max_header bytes of headroom are reserved, and use a new
skb field, avail_size to hold the data payload limit.

This way, order-0 allocations done by TCP stack can leave more than 2 KB
of tailroom and no more allocation is performed in mac80211 layer (or
any layer needing some tailroom)

avail_size is unioned with mark/dropcount, since mark will be set later
in IP stack for output packets. Therefore, skb size is unchanged.

Reported-by: Marc MERLIN <marc@merlins.org>
Tested-by: Marc MERLIN <marc@merlins.org>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agonet: allow pskb_expand_head() to get maximum tailroom
Eric Dumazet [Tue, 10 Apr 2012 20:08:39 +0000 (20:08 +0000)]
net: allow pskb_expand_head() to get maximum tailroom

Marc Merlin reported many order-1 allocations failures in TX path on its
wireless setup, that dont make any sense with MTU=1500 network, and non
SG capable hardware.

Turns out part of the problem comes from pskb_expand_head() not using
ksize() to get exact head size given by kmalloc(). Doing the same thing
than __alloc_skb() allows more tailroom in skb and can prevent future
reallocations.

As a bonus, struct skb_shared_info becomes cache line aligned.

Reported-by: Marc MERLIN <marc@merlins.org>
Tested-by: Marc MERLIN <marc@merlins.org>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agobridge: Do not send queries on multicast group leaves
Herbert Xu [Wed, 4 Apr 2012 01:01:20 +0000 (01:01 +0000)]
bridge: Do not send queries on multicast group leaves

As it stands the bridge IGMP snooping system will respond to
group leave messages with queries for remaining membership.
This is both unnecessary and undesirable.  First of all any
multicast routers present should be doing this rather than us.
What's more the queries that we send may end up upsetting other
multicast snooping swithces in the system that are buggy.

In fact, we can simply remove the code that send these queries
because the existing membership expiry mechanism doesn't rely
on them anyway.

So this patch simply removes all code associated with group
queries in response to group leave messages.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agodrm/i915: implement ColorBlt w/a
Daniel Vetter [Sat, 31 Mar 2012 09:21:57 +0000 (11:21 +0200)]
drm/i915: implement ColorBlt w/a

According to an internal workaround master list, we need to set bit 5
of register 9400 to avoid issues with color blits.

Testing shows that this seems to fix the blitter hangs when fbc is
enabled on snb, thanks to Chris Wilson for figuring this out.

Tested-by: Chris Wilson <chris@chris-wilson.co.uk>
Tested-by: Michael "brot" Groh <michael.groh@minad.de>
Acked-by: Ben Widawsky <ben@bwidawsk.net>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
12 years agodrm/i915/ringbuffer: Exclude last 2 cachlines of ring on 845g
Chris Wilson [Mon, 9 Apr 2012 12:59:46 +0000 (13:59 +0100)]
drm/i915/ringbuffer: Exclude last 2 cachlines of ring on 845g

The 845g shares the errata with i830 whereby executing a command
within 2 cachelines of the end of the ringbuffer may cause a GPU hang.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: stable@kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
12 years agoRevert "drm/i915: reenable gmbus on gen3+ again"
Daniel Vetter [Mon, 9 Apr 2012 19:10:38 +0000 (21:10 +0200)]
Revert "drm/i915: reenable gmbus on gen3+ again"

This reverts commit c3dfefa0a6d235bd465309e12f4c56ea16e71111.

gmbus in 3.4 has simply too many known issues:
- gmbus is too noisy, we need to rework the logging:
  https://bugs.freedesktop.org/show_bug.cgi?id=48248
- zero-length writes cause an OOPS, and they are
  userspace-triggerable:
  https://lkml.org/lkml/2012/3/30/176
- same for zero-length reads:
  https://bugs.freedesktop.org/show_bug.cgi?id=48269

We can try again for 3.5.

Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
12 years agodrm/radeon: only add the mm i2c bus if the hw_i2c module param is set
Alex Deucher [Tue, 10 Apr 2012 16:14:27 +0000 (12:14 -0400)]
drm/radeon: only add the mm i2c bus if the hw_i2c module param is set

It seems it can corrupt the monitor EDID in certain cases on certain
boards when running sensors detect.  It's rarely used anyway outside
of AIW boards.

http://lists.lm-sensors.org/pipermail/lm-sensors/2012-April/035847.html
http://lists.freedesktop.org/archives/xorg/2011-January/052239.html

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
12 years agovgaarb.h: fix build warnings
Randy Dunlap [Mon, 30 Jan 2012 19:43:52 +0000 (11:43 -0800)]
vgaarb.h: fix build warnings

Fix build warnings by providing a struct stub since no fields of
the struct are used:

include/linux/vgaarb.h:66:9: warning: 'struct pci_dev' declared inside parameter list
include/linux/vgaarb.h:66:9: warning: its scope is only this definition or declaration, which is probably not what you want
include/linux/vgaarb.h:99:34: warning: 'struct pci_dev' declared inside parameter list
include/linux/vgaarb.h:109:6: warning: 'struct pci_dev' declared inside parameter list
include/linux/vgaarb.h:121:8: warning: 'struct pci_dev' declared inside parameter list
include/linux/vgaarb.h:140:37: warning: 'struct pci_dev' declared inside parameter list

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>
12 years agoirqdomain: Fix debugfs formatting
Grant Likely [Wed, 11 Apr 2012 06:26:25 +0000 (00:26 -0600)]
irqdomain: Fix debugfs formatting

This patch fixes the irq_domain_mapping debugfs output to pad pointer
values with leading zeros so that pointer values are displayed
correctly.  Otherwise you get output similar to "0x 5e0000000000000".
Also, when the irq_domain is set to 'null'

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Cc: David Daney <david.daney@cavium.com>
Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
12 years agoirq_domain: correct the debugfs file name
Mika Westerberg [Tue, 10 Apr 2012 12:25:42 +0000 (15:25 +0300)]
irq_domain: correct the debugfs file name

The actual name of the irq_domain mapping debugfs file is
"irq_domain_mapping" not "virq_mapping".

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
12 years agoirq: Kill pointless irqd_to_hw export
Grant Likely [Tue, 3 Apr 2012 13:11:04 +0000 (07:11 -0600)]
irq: Kill pointless irqd_to_hw export

It makes no sense to export this trivial function.  Make it a static inline
instead.

This patch also drops virq_to_hw from arch/c6x since it is unused by that
architecture.

v2: Move irq_hw_number_t into types.h to fix ARM build failure

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agoirq/irq_domain: Quit ignoring error returns from irq_alloc_desc_from().
David Daney [Thu, 5 Apr 2012 23:52:13 +0000 (16:52 -0700)]
irq/irq_domain: Quit ignoring error returns from irq_alloc_desc_from().

In commit 4bbdd45a (irq_domain/powerpc: eliminate irq_map; use
irq_alloc_desc() instead) code was added that ignores error returns
from irq_alloc_desc_from() by (silently) casting the return value to
unsigned.  The negitive value error return now suddenly looks like a
valid irq number.

Commits cc79ca69 (irq_domain: Move irq_domain code from powerpc to
kernel/irq) and 1bc04f2c (irq_domain: Add support for base irq and
hwirq in legacy mappings) move this code to its current location in
irqdomain.c

The result of all of this is a null pointer dereference OOPS if one of
the error cases is hit.

The fix: Don't cast away the negativeness of the return value and then
check for errors.

Signed-off-by: David Daney <david.daney@cavium.com>
Acked-by: Rob Herring <rob.herring@calxeda.com>
[grant.likely: dropped addition of new 'irq' variable]
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
12 years agoMAINTAINERS: Mark NATSEMI driver as orphan'd.
David S. Miller [Wed, 11 Apr 2012 01:10:43 +0000 (21:10 -0400)]
MAINTAINERS: Mark NATSEMI driver as orphan'd.

After discussion with Tim Hockin.

Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agopowerpc: Fix typo in runlatch code
Benjamin Herrenschmidt [Wed, 11 Apr 2012 00:42:15 +0000 (10:42 +1000)]
powerpc: Fix typo in runlatch code

Commit fe1952fc0afb9a2e4c79f103c08aef5d13db1873
"powerpc: Rework runlatch code" has a nasty typo
where it uses "TLF_RUNLATCH" instead of "_TLF_RUNLATCH"
(bit number instead of bit mask), causing some flags to
be potentially lost such as _TLF_RESTORE_SIGMASK

(Brown paper bag for me ! We should be able to make
that break at compile time with a bit of magic, any
volunteer ?)

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
12 years agoSmack: build when CONFIG_AUDIT not defined
Kees Cook [Tue, 10 Apr 2012 20:26:44 +0000 (13:26 -0700)]
Smack: build when CONFIG_AUDIT not defined

This fixes builds where CONFIG_AUDIT is not defined and
CONFIG_SECURITY_SMACK=y.

This got introduced by the stack-usage reducation commit 48c62af68a40
("LSM: shrink the common_audit_data data union").

Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Eric Paris <eparis@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoMerge tag 'dmaengine-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw...
Linus Torvalds [Tue, 10 Apr 2012 22:30:16 +0000 (15:30 -0700)]
Merge tag 'dmaengine-fixes' of git://git./linux/kernel/git/djbw/dmaengine

Pull dmaengine fixes from Dan Williams:

1/ regression fix for Xen as it now trips over a broken assumption
   about the dma address size on 32-bit builds

2/ new quirk for netdma to ignore dma channels that cannot meet
   netdma alignment requirements

3/ fixes for two long standing issues in ioatdma (ring size overflow)
   and iop-adma (potential stack corruption)

* tag 'dmaengine-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/dmaengine:
  netdma: adding alignment check for NETDMA ops
  ioatdma: DMA copy alignment needed to address IOAT DMA silicon errata
  ioat: ring size variables need to be 32bit to avoid overflow
  iop-adma: Corrected array overflow in RAID6 Xscale(R) test.
  ioat: fix size of 'completion' for Xen

12 years agotcp: fix tcp_rcv_rtt_update() use of an unscaled RTT sample
Neal Cardwell [Tue, 10 Apr 2012 07:59:20 +0000 (07:59 +0000)]
tcp: fix tcp_rcv_rtt_update() use of an unscaled RTT sample

Fix a code path in tcp_rcv_rtt_update() that was comparing scaled and
unscaled RTT samples.

The intent in the code was to only use the 'm' measurement if it was a
new minimum.  However, since 'm' had not yet been shifted left 3 bits
but 'new_sample' had, this comparison would nearly always succeed,
leading us to erroneously set our receive-side RTT estimate to the 'm'
sample when that sample could be nearly 8x too high to use.

The overall effect is to often cause the receive-side RTT estimate to
be significantly too large (up to 40% too large for brief periods in
my tests).

Signed-off-by: Neal Cardwell <ncardwell@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agotcp: restore correct limit
Eric Dumazet [Tue, 10 Apr 2012 00:56:42 +0000 (00:56 +0000)]
tcp: restore correct limit

Commit c43b874d5d714f (tcp: properly initialize tcp memory limits) tried
to fix a regression added in commits 4acb4190 & 3dc43e3,
but still get it wrong.

Result is machines with low amount of memory have too small tcp_rmem[2]
value and slow tcp receives : Per socket limit being 1/1024 of memory
instead of 1/128 in old kernels, so rcv window is capped to small
values.

Fix this to match comment and previous behavior.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Glauber Costa <glommer@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
12 years agoMerge branch 'master' of git://1984.lsi.us.es/net
David S. Miller [Tue, 10 Apr 2012 18:38:31 +0000 (14:38 -0400)]
Merge branch 'master' of git://1984.lsi.us.es/net

12 years agoRevert "ath9k: fix going to full-sleep on PS idle"
Sujith Manoharan [Tue, 10 Apr 2012 06:56:11 +0000 (12:26 +0530)]
Revert "ath9k: fix going to full-sleep on PS idle"

This reverts commit c1afdaff90538ef085b756454f12b29575411214.

Users have reported connection failures in 3.3.1 and suspend/resume
failures in 3.4-rcX. Revert this commit for now - PS IDLE can be
fixed in a clean manner later on.

Cc: stable@vger.kernel.org
Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
12 years agort2x00: Fix rfkill_polling register function.
Chen, Chien-Chia [Thu, 29 Mar 2012 10:21:47 +0000 (18:21 +0800)]
rt2x00: Fix rfkill_polling register function.

  Move rt2x00rfkill_register(rt2x00dev) to rt2x00lib_probe_dev
  function. It fixes of starting rfkill_poll function at the
  right time if sets hard rfkill block and reboot. rt2x00mac_rfkill_poll
  should be starting before bringing up the wireless interface.

Signed-off-by: Chen, Chien-Chia <machen@suse.com>
Acked-by: Helmut Schaa <helmut.schaa@googlemail.com>
CC: Kevin Chou <kevin.chou@mediatek.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
12 years agobcma: fix build error on MIPS; implicit pcibios_enable_device
Paul Gortmaker [Mon, 26 Mar 2012 00:02:55 +0000 (20:02 -0400)]
bcma: fix build error on MIPS; implicit pcibios_enable_device

The following is seen during allmodconfig builds for MIPS:

drivers/bcma/driver_pci_host.c:518:2: error: implicit declaration
of function 'pcibios_enable_device' [-Werror=implicit-function-declaration]
cc1: some warnings being treated as errors
make[3]: *** [drivers/bcma/driver_pci_host.o] Error 1

Most likey introduced by commit 49dc9577155576b10ff79f0c1486c816b01f58bf

    "bcma: add PCIe host controller"

Add the header instead of implicitly assuming it will be present.
Sounds like a good idea, but that alone doesn't fix anything.

The real problem is that the Kconfig has settings related to whether
PCI is possible, i.e.

  config BCMA_HOST_PCI_POSSIBLE
        bool
        depends on BCMA && PCI = y
        default y

  config BCMA_HOST_PCI
        bool "Support for BCMA on PCI-host bus"
        depends on BCMA_HOST_PCI_POSSIBLE

...but what is missing is that BCMA_DRIVER_PCI_HOSTMODE doesn't
have any dependencies on the above.  Add one.

CC: Hauke Mehrtens <hauke@hauke-m.de>
CC: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
12 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
Linus Torvalds [Tue, 10 Apr 2012 17:28:26 +0000 (10:28 -0700)]
Merge git://git./linux/kernel/git/davem/sparc

Pull sparc fixes from David Miller:

1) Build fix for LEON, from Sam Ravnborg.

2) Make the sparc side changes that go along with the infrastructure to
   retry faults when blocking on a disk transfer.  From Kautuk Consul.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc32,leon: fix leon build
  sparc/mm/fault_32.c: Port OOM changes to do_sparc_fault
  sparc/mm/fault_64.c: Port OOM changes to do_sparc64_fault

12 years agoMerge tag 'regulator-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie...
Linus Torvalds [Tue, 10 Apr 2012 17:26:41 +0000 (10:26 -0700)]
Merge tag 'regulator-3.4' of git://git./linux/kernel/git/broonie/regulator

Pull a regulator build fix from Mark Brown:
 "Fix a build warning in the anatop driver for 3.4

  This is a trivial rename to stop the build system complaining that
  we're referencing things we shouldn't be."

* tag 'regulator-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: anatop: fix 'anatop_regulator' name collision

12 years agodrm/i915: properly compute dp dithering for user-created modes
Daniel Vetter [Tue, 10 Apr 2012 08:42:36 +0000 (10:42 +0200)]
drm/i915: properly compute dp dithering for user-created modes

We've only computed whether we need to fall back to 6bpc due to dp
link bandwidth constrains in mode_valid, but not mode_fixup. Under
various circumstances X likes to create new modes which then lack
proper 6bpc flags (if required), resulting in mode_fixup failures and
ultimately black screens.

Chris Wilson pointed out that we still get things wrong for bpp > 24,
but that should be fixed in another patch (and it'll be easier because
this patch consolidates the logic).

The likely culprit for this regression is

commit 3d794f87238f74d80e78a7611c7fbde8a54c85c2
Author: Keith Packard <keithp@keithp.com>
Date:   Wed Jan 25 08:16:25 2012 -0800

    drm/i915: Force explicit bpp selection for intel_dp_link_required

v2: Fix indentation and tune down the too bold claim that this should
fix the world. Both noticed by Chris Wilson.

v3: Try to really git add things.

Reported-and-tested-by: Brice Goglin <Brice.Goglin@ens-lyon.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=48170
Cc: stable@kernel.org
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
12 years agoInput: gpio_mouse - use linux/gpio.h rather than asm/gpio.h
Mark Brown [Tue, 10 Apr 2012 16:03:03 +0000 (09:03 -0700)]
Input: gpio_mouse - use linux/gpio.h rather than asm/gpio.h

Direct usage of the asm include has long been deprecated by the
introduction of gpiolib.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
12 years agoMerge branch 'for-3.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml
Linus Torvalds [Tue, 10 Apr 2012 15:09:34 +0000 (08:09 -0700)]
Merge branch 'for-3.4-rc3' of git://git./linux/kernel/git/rw/uml

Pull UML fixes from Richard Weinberger.

* 'for-3.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
  um: uml_setup_stubs': warning: unused variable 'pages'
  um: Use asm-generic/switch_to.h
  um: Disintegrate asm/system.h
  um: switch cow_user.h to htobe{32,64}/betoh{32,64}
  um: several x86 hw-dependent crypto modules won't build on uml
  um: fix linker script generation

12 years agoi2c: prevent spurious interrupt on Designware controllers
Kristen Carlson Accardi [Tue, 10 Apr 2012 13:15:41 +0000 (14:15 +0100)]
i2c: prevent spurious interrupt on Designware controllers

Don't call i2c_enable on resume because it causes a spurious
interrupt.

Signed-off-by: Kristen Carlson Accardi <kristen@linux.intel.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
12 years agoALSA: hda - hide HDMI/ELD printks unless snd.debug=2
Fengguang Wu [Tue, 10 Apr 2012 09:00:35 +0000 (17:00 +0800)]
ALSA: hda - hide HDMI/ELD printks unless snd.debug=2

Also remove two warnings when CONFIG_SND_DEBUG is not set:

sound/pci/hda/patch_hdmi.c: In function ‘hdmi_intrinsic_event’:
sound/pci/hda/patch_hdmi.c:761:6: warning: unused variable ‘eldv’ [-Wunused-variable]
sound/pci/hda/patch_hdmi.c:760:6: warning: unused variable ‘pd’ [-Wunused-variable]

Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
12 years agoGFS2: Allow caching of rindex glock
Bob Peterson [Tue, 10 Apr 2012 12:56:04 +0000 (08:56 -0400)]
GFS2: Allow caching of rindex glock

This patch allows caching of the rindex glock. We were previously
setting the GL_NOCACHE bit when the glock was released. That forced
the rindex inode to be invalidated, which caused us to re-read
rindex at the next access. However, it caused the glock to be
unnecessarily bounced around the cluster. This patch allows
the glock to remain cached, but it still causes the rindex to be
re-read once it has been written to by gfs2_grow.

Ben and I have tested single-node gfs2_grow cases and I've tested
clustered gfs2_grow cases on my four-node cluster.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
12 years agonetfilter: nf_conntrack: fix incorrect logic in nf_conntrack_init_net
Gao feng [Sat, 7 Apr 2012 16:08:28 +0000 (16:08 +0000)]
netfilter: nf_conntrack: fix incorrect logic in nf_conntrack_init_net

in function nf_conntrack_init_net,when nf_conntrack_timeout_init falied,
we should call nf_conntrack_ecache_fini to do rollback.
but the current code calls nf_conntrack_timeout_fini.

Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
12 years agonetfilter: nf_ct_ipv4: packets with wrong ihl are invalid
Jozsef Kadlecsik [Tue, 3 Apr 2012 20:02:01 +0000 (22:02 +0200)]
netfilter: nf_ct_ipv4: packets with wrong ihl are invalid

It was reported that the Linux kernel sometimes logs:

klogd: [2629147.402413] kernel BUG at net / netfilter /
nf_conntrack_proto_tcp.c: 447!
klogd: [1072212.887368] kernel BUG at net / netfilter /
nf_conntrack_proto_tcp.c: 392

ipv4_get_l4proto() in nf_conntrack_l3proto_ipv4.c and tcp_error() in
nf_conntrack_proto_tcp.c should catch malformed packets, so the errors
at the indicated lines - TCP options parsing - should not happen.
However, tcp_error() relies on the "dataoff" offset to the TCP header,
calculated by ipv4_get_l4proto().  But ipv4_get_l4proto() does not check
bogus ihl values in IPv4 packets, which then can slip through tcp_error()
and get caught at the TCP options parsing routines.

The patch fixes ipv4_get_l4proto() by invalidating packets with bogus
ihl value.

The patch closes netfilter bugzilla id 771.

Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
12 years agodrm/radeon/kms: fix DVO setup on some r4xx chips
Alex Deucher [Tue, 3 Apr 2012 21:05:41 +0000 (17:05 -0400)]
drm/radeon/kms: fix DVO setup on some r4xx chips

Some r4xx chips have the wrong frev in the
DVOEncoderControl table.  It should always be 1
on r4xx.  Fixes modesetting on DVO on r4xx chips
with the bad frev.

Reported by twied on #radeon.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
12 years agodrm/savage: fix integer overflows in savage_bci_cmdbuf()
Xi Wang [Fri, 6 Apr 2012 21:38:24 +0000 (17:38 -0400)]
drm/savage: fix integer overflows in savage_bci_cmdbuf()

Since cmdbuf->size and cmdbuf->nbox are from userspace, a large value
would overflow the allocation size, leading to out-of-bounds access.

Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>