firefly-linux-kernel-4.4.55.git
9 years agompls: Fix mpls_gso handler.
Pravin B Shelar [Thu, 30 Oct 2014 07:49:57 +0000 (00:49 -0700)]
mpls: Fix mpls_gso handler.

mpls gso handler needs to pull skb after segmenting skb.

CC: Simon Horman <simon.horman@netronome.com>
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoMerge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 31 Oct 2014 19:43:52 +0000 (12:43 -0700)]
Merge branch 'core-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull core fixes from Ingo Molnar:
 "The tree contains two RCU fixes and a compiler quirk comment fix"

* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  rcu: Make rcu_barrier() understand about missing rcuo kthreads
  compiler/gcc4+: Remove inaccurate comment about 'asm goto' miscompiles
  rcu: More on deadlock between CPU hotplug and expedited grace periods

9 years agoMerge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 31 Oct 2014 19:33:05 +0000 (12:33 -0700)]
Merge branch 'timers-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull timer fixes from Thomas Gleixner:
 "As you requested in the rc2 release mail the timer department serves
  you a few real bug fixes:

   - Fix the probe logic of the architected arm/arm64 timer
   - Plug a stack info leak in posix-timers
   - Prevent a shift out of bounds issue in the clockevents core"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  ARM/ARM64: arch-timer: fix arch_timer_probed logic
  clockevents: Prevent shift out of bounds
  posix-timers: Fix stack info leak in timer_create()

9 years agoMerge tag 'trace-fixes-v3.18-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 31 Oct 2014 19:28:38 +0000 (12:28 -0700)]
Merge tag 'trace-fixes-v3.18-rc1-2' of git://git./linux/kernel/git/rostedt/linux-trace

Pull tracing fix from Steven Rostedt:
 "ARM has system calls outside the NR_syscalls range, and the generic
  tracing system does not support that and without checks, it can cause
  an oops to be reported.

  Rabin Vincent added checks in the return code on syscall events to
  make sure that the system call number is within the range that tracing
  knows about, and if not, simply ignores the system call.

  The system call tracing infrastructure needs to be rewritten to handle
  these cases better, but for now, to keep from oopsing, this patch will
  do"

* tag 'trace-fixes-v3.18-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing/syscalls: Ignore numbers outside NR_syscalls' range

9 years agoMerge tag 'docs-for-linus' of git://git.lwn.net/linux-2.6
Linus Torvalds [Fri, 31 Oct 2014 18:55:40 +0000 (11:55 -0700)]
Merge tag 'docs-for-linus' of git://git.lwn.net/linux-2.6

Pull documentation fixes from Jonathan Corbet:
 "So this is my first pull request since I rashly agreed to look after
  the documentation subtree.  It contains some typo fixes, a few minor
  documentation improvements, and, most importantly, fixes for a couple
  of build problems in various bits of sample code.

  I fully intend to start sending pull requests with signed tags.
  However, due to poor planning on my part and the general obnoxiousness
  of life, I'm 2000 miles away from my private key which is sitting on a
  powered-down machine.  This should be fixed before my next request.

  Meanwhile git.lwn.net is a machine under my control, the patches are
  all trivial, and all have done time in linux-next"

* tag 'docs-for-linus' of git://git.lwn.net/linux-2.6:
  Documentation/SubmittingPatches: Reported-by tags and permission
  Documentation: remove outdated references to the linux-next wiki
  Documentation: Restrict TSC test code to x86
  doc: kernel-parameters.txt: Add ide-generic.probe-mask
  vdso: don't require 64-bit math in standalone test
  Documentation: Add CONFIG_DEBUG_KMEMLEAK_DEFAULT_OFF case
  Documentation: Add default kmemleak off case in kernel-parameters.txt
  Docs: Document that the sticky bit is understood by hugetlbfs
  DocBook: Reduce noise from make cleandocs
  Documentation: fix vdso_standalone_test_x86 on 32-bit
  Documentation: dt-bindings: Explain order in patch series
  Documentation/ABI/testing/sysfs-ibft: fix a typo

9 years agor8152: stop submitting intr for -EPROTO
hayeswang [Fri, 31 Oct 2014 05:35:57 +0000 (13:35 +0800)]
r8152: stop submitting intr for -EPROTO

For Renesas USB 3.0 host controller, when unplugging the usb hub which
has the RTL8153 plugged, the driver would get -EPROTO for interrupt
transfer. There is high probability to get the information of "HC died;
cleaning up", if the driver continues to submit the interrupt transfer
before the disconnect() is called.

[ 1024.197678] r8152 9-1.4:1.0 eth0: intr status -71
[ 1024.213673] r8152 9-1.4:1.0 eth0: intr status -71
[ 1024.229668] r8152 9-1.4:1.0 eth0: intr status -71
[ 1024.245661] r8152 9-1.4:1.0 eth0: intr status -71
[ 1024.261653] r8152 9-1.4:1.0 eth0: intr status -71
[ 1024.277648] r8152 9-1.4:1.0 eth0: intr status -71
[ 1024.293642] r8152 9-1.4:1.0 eth0: intr status -71
[ 1024.309638] r8152 9-1.4:1.0 eth0: intr status -71
[ 1024.325633] r8152 9-1.4:1.0 eth0: intr status -71
[ 1024.341627] r8152 9-1.4:1.0 eth0: intr status -71
[ 1024.357621] r8152 9-1.4:1.0 eth0: intr status -71
[ 1024.373615] r8152 9-1.4:1.0 eth0: intr status -71
[ 1024.383097] usb 9-1: USB disconnect, device number 2
[ 1024.383103] usb 9-1.4: USB disconnect, device number 6
[ 1029.391010] xhci_hcd 0000:04:00.0: xHCI host not responding to stop endpoint command.
[ 1029.391016] xhci_hcd 0000:04:00.0: Assuming host is dying, halting host.
[ 1029.392551] xhci_hcd 0000:04:00.0: HC died; cleaning up
[ 1029.421480] usb 8-1: USB disconnect, device number 2

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoRevert "Input: i8042 - disable active multiplexing by default"
Dmitry Torokhov [Fri, 31 Oct 2014 16:35:53 +0000 (09:35 -0700)]
Revert "Input: i8042 - disable active multiplexing by default"

This reverts commit 68da166491655bc54051bf04c78ce648e2e33508.

It turns out that the assertion about scope of regressions due to
always keeping keyboard controller in legacy mode was proven wrong.
There are laptops, such as Clevo W650SH, that only have internal
touchpad (no external PS/2 ports), that require active multiplexing
mode to switch the touchpad (Elantech) into native mode instead of
basic PS/2 emulation.

Reported-by: Roel Aaij <roel.aaij@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
9 years agoInput: altera_ps2 - use correct type for irq return value
Tobias Klauser [Fri, 31 Oct 2014 16:16:41 +0000 (09:16 -0700)]
Input: altera_ps2 - use correct type for irq return value

The irq function altera_ps2_rxint returns an irqreturn_t, so use the
same type for variable storing the return value.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
9 years agoInput: altera_ps2 - write to correct register when disabling interrupts
Tobias Klauser [Fri, 31 Oct 2014 16:16:19 +0000 (09:16 -0700)]
Input: altera_ps2 - write to correct register when disabling interrupts

In altera_ps2_close, the data register (offset 0) is written instead of
the control register (offset 4), leading to the RX interrupt not being
disabled. Fix this by calling writel() with the offset for the proper
register.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
9 years agoInput: max77693-haptic - fix potential overflow
Dmitry Torokhov [Tue, 28 Oct 2014 16:27:58 +0000 (09:27 -0700)]
Input: max77693-haptic - fix potential overflow

Expression haptic->pwm_dev->period * haptic->magnitude is of type
'unsigned int' and may overflow. We need to convert one of the operands
to u64 before multiplying, instead of casting result (potentially
overflown) to u64.

Reported by Coverity: CID 1248753

Acked-by : Jaewon Kim <jaewon02.kim@samsung.com>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
9 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf
David S. Miller [Fri, 31 Oct 2014 16:29:42 +0000 (12:29 -0400)]
Merge git://git./pub/scm/linux/kernel/git/pablo/nf

Pablo Neira Ayuso says:

====================
netfilter/ipvs fixes for net

The following patchset contains fixes for netfilter/ipvs. This round of
fixes is larger than usual at this stage, specifically because of the
nf_tables bridge reject fixes that I would like to see in 3.18. The
patches are:

1) Fix a null-pointer dereference that may occur when logging
   errors. This problem was introduced by 4a4739d56b0 ("ipvs: Pull
   out crosses_local_route_boundary logic") in v3.17-rc5.

2) Update hook mask in nft_reject_bridge so we can also filter out
   packets from there. This fixes 36d2af5 ("netfilter: nf_tables: allow
   to filter from prerouting and postrouting"), which needs this chunk
   to work.

3) Two patches to refactor common code to forge the IPv4 and IPv6
   reject packets from the bridge. These are required by the nf_tables
   reject bridge fix.

4) Fix nft_reject_bridge by avoiding the use of the IP stack to reject
   packets from the bridge. The idea is to forge the reject packets and
   inject them to the original port via br_deliver() which is now
   exported for that purpose.

5) Restrict nft_reject_bridge to bridge prerouting and input hooks.
   the original skbuff may cloned after prerouting when the bridge stack
   needs to flood it to several bridge ports, it is too late to reject
   the traffic.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agonetfilter: nft_reject_bridge: restrict reject to prerouting and input
Pablo Neira Ayuso [Mon, 27 Oct 2014 13:08:17 +0000 (14:08 +0100)]
netfilter: nft_reject_bridge: restrict reject to prerouting and input

Restrict the reject expression to the prerouting and input bridge
hooks. If we allow this to be used from forward or any other later
bridge hook, if the frame is flooded to several ports, we'll end up
sending several reject packets, one per cloned packet.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
9 years agonetfilter: nft_reject_bridge: don't use IP stack to reject traffic
Pablo Neira Ayuso [Sat, 25 Oct 2014 16:40:26 +0000 (18:40 +0200)]
netfilter: nft_reject_bridge: don't use IP stack to reject traffic

If the packet is received via the bridge stack, this cannot reject
packets from the IP stack.

This adds functions to build the reject packet and send it from the
bridge stack. Comments and assumptions on this patch:

1) Validate the IPv4 and IPv6 headers before further processing,
   given that the packet comes from the bridge stack, we cannot assume
   they are clean. Truncated packets are dropped, we follow similar
   approach in the existing iptables match/target extensions that need
   to inspect layer 4 headers that is not available. This also includes
   packets that are directed to multicast and broadcast ethernet
   addresses.

2) br_deliver() is exported to inject the reject packet via
   bridge localout -> postrouting. So the approach is similar to what
   we already do in the iptables reject target. The reject packet is
   sent to the bridge port from which we have received the original
   packet.

3) The reject packet is forged based on the original packet. The TTL
   is set based on sysctl_ip_default_ttl for IPv4 and per-net
   ipv6.devconf_all hoplimit for IPv6.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
9 years agonetfilter: nf_reject_ipv6: split nf_send_reset6() in smaller functions
Pablo Neira Ayuso [Sun, 26 Oct 2014 11:35:54 +0000 (12:35 +0100)]
netfilter: nf_reject_ipv6: split nf_send_reset6() in smaller functions

That can be reused by the reject bridge expression to build the reject
packet. The new functions are:

* nf_reject_ip6_tcphdr_get(): to sanitize and to obtain the TCP header.
* nf_reject_ip6hdr_put(): to build the IPv6 header.
* nf_reject_ip6_tcphdr_put(): to build the TCP header.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
9 years agonetfilter: nf_reject_ipv4: split nf_send_reset() in smaller functions
Pablo Neira Ayuso [Sat, 25 Oct 2014 16:24:57 +0000 (18:24 +0200)]
netfilter: nf_reject_ipv4: split nf_send_reset() in smaller functions

That can be reused by the reject bridge expression to build the reject
packet. The new functions are:

* nf_reject_ip_tcphdr_get(): to sanitize and to obtain the TCP header.
* nf_reject_iphdr_put(): to build the IPv4 header.
* nf_reject_ip_tcphdr_put(): to build the TCP header.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
9 years agonetfilter: nf_tables_bridge: update hook_mask to allow {pre,post}routing
Pablo Neira Ayuso [Sat, 25 Oct 2014 10:25:06 +0000 (12:25 +0200)]
netfilter: nf_tables_bridge: update hook_mask to allow {pre,post}routing

Fixes: 36d2af5 ("netfilter: nf_tables: allow to filter from prerouting and postrouting")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
9 years agoReturn short read or 0 at end of a raw device, not EIO
David Jeffery [Mon, 29 Sep 2014 14:21:10 +0000 (10:21 -0400)]
Return short read or 0 at end of a raw device, not EIO

Author: David Jeffery <djeffery@redhat.com>
Changes to the basic direct I/O code have broken the raw driver when reading
to the end of a raw device.  Instead of returning a short read for a read that
extends partially beyond the device's end or 0 when at the end of the device,
these reads now return EIO.

The raw driver needs the same end of device handling as was added for normal
block devices.  Using blkdev_read_iter, which has the needed size checks,
prevents the EIO conditions at the end of the device.

Signed-off-by: David Jeffery <djeffery@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agoisofs: don't bother with ->d_op for normal case
Al Viro [Tue, 28 Oct 2014 22:40:11 +0000 (18:40 -0400)]
isofs: don't bother with ->d_op for normal case

we only need it for joliet and case-insensitive mounts

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agodrm/vmwgfx: Filter out modes those cannot be supported by the current VRAM size.
Sinclair Yeh [Fri, 31 Oct 2014 08:58:06 +0000 (09:58 +0100)]
drm/vmwgfx: Filter out modes those cannot be supported by the current VRAM size.

When screen objects are enabled, the bpp is assumed to be 32, otherwise
it is set to 16.

v2:
* Use u32 instead of u64 for assumed_bpp.
* Fixed mechanism to check for screen objects
* Limit the back buffer size to VRAM.

Signed-off-by: Sinclair Yeh <syeh@vmware.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Cc: <stable@vger.kernel.org>
9 years agodrm/vmwgfx: Fix hash key computation
Thomas Hellstrom [Fri, 31 Oct 2014 08:54:22 +0000 (09:54 +0100)]
drm/vmwgfx: Fix hash key computation

The hash key computation in vmw_cmdbuf_res_remove incorrectly didn't take
the resource type into account, contrary to all the other related functions.
This becomes important when the cmdbuf resource manager handles more than
one resource type.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
9 years agodrm/vmwgfx: fix lock breakage
Rob Clark [Thu, 30 Oct 2014 17:39:04 +0000 (13:39 -0400)]
drm/vmwgfx: fix lock breakage

After:

commit d059f652e73c35678d28d4cd09ab2cec89696af9
Author:     Daniel Vetter <daniel.vetter@ffwll.ch>
AuthorDate: Fri Jul 25 18:07:40 2014 +0200

    drm: Handle legacy per-crtc locking with full acquire ctx

drm_mode_cursor_common() was switched to use drm_modeset_(un)lock_crtc()
which uses full aquire ctx.  So dropping/reaquiring the lock via
drm_modeset_(un)lock() directly isn't the right thing to do, as lockdep
kindly points out.

The 'FIXME's about sorting out whether vmwgfx *really* needs to lock-all
for cursor updates still apply.

Signed-off-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>
Tested-by: Thomas Hellstrom <thellstrom@vmware.com>
9 years agopowerpc/powernv: Properly fix LPC debugfs endianness
Benjamin Herrenschmidt [Thu, 30 Oct 2014 05:19:13 +0000 (16:19 +1100)]
powerpc/powernv: Properly fix LPC debugfs endianness

Endian is hard, especially when I designed a stupid FW interface, and
I should know better... oh well, this is attempt #2 at fixing this
properly. This time it seems to work with all access sizes and I
can run my flashing tool (which exercises all sort of access sizes
and types to access the SPI controller in the BMC) just fine.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: stable@vger.kernel.org
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
9 years agopowerpc: do_notify_resume can be called with bad thread_info flags argument
Anton Blanchard [Fri, 31 Oct 2014 05:50:57 +0000 (16:50 +1100)]
powerpc: do_notify_resume can be called with bad thread_info flags argument

Back in 7230c5644188 ("powerpc: Rework lazy-interrupt handling") we
added a call out to restore_interrupts() (written in c) before calling
do_notify_resume:

        bl      restore_interrupts
        addi    r3,r1,STACK_FRAME_OVERHEAD
        bl      do_notify_resume

Unfortunately do_notify_resume takes two arguments, the second one
being the thread_info flags:

void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags)

We do populate r4 (the second argument) earlier, but
restore_interrupts() is free to muck it up all it wants. My guess is
the gcc compiler gods shone down on us and its register allocator
never used r4. Sometimes, rarely, luck is on our side.

LLVM on the other hand did trample r4.

Signed-off-by: Anton Blanchard <anton@samba.org>
Cc: stable@vger.kernel.org
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
9 years agodrivers/net: macvtap and tun depend on INET
Ben Hutchings [Fri, 31 Oct 2014 03:10:31 +0000 (03:10 +0000)]
drivers/net: macvtap and tun depend on INET

These drivers now call ipv6_proxy_select_ident(), which is defined
only if CONFIG_INET is enabled.  However, they have really depended
on CONFIG_INET for as long as they have allowed sending GSO packets
from userland.

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Fixes: f43798c27684 ("tun: Allow GSO using virtio_net_hdr")
Fixes: b9fb9ee07e67 ("macvtap: add GSO/csum offload support")
Fixes: 5188cd44c55d ("drivers/net, ipv6: Select IPv6 fragment idents for virtio UFO packets")
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agotracing/syscalls: Ignore numbers outside NR_syscalls' range
Rabin Vincent [Wed, 29 Oct 2014 22:06:58 +0000 (23:06 +0100)]
tracing/syscalls: Ignore numbers outside NR_syscalls' range

ARM has some private syscalls (for example, set_tls(2)) which lie
outside the range of NR_syscalls.  If any of these are called while
syscall tracing is being performed, out-of-bounds array access will
occur in the ftrace and perf sys_{enter,exit} handlers.

 # trace-cmd record -e raw_syscalls:* true && trace-cmd report
 ...
 true-653   [000]   384.675777: sys_enter:            NR 192 (0, 1000, 3, 4000022ffffffff, 0)
 true-653   [000]   384.675812: sys_exit:             NR 192 = 1995915264
 true-653   [000]   384.675971: sys_enter:            NR 983045 (76f7448076f7400076f74b2876f7448076f76f74, 1)
 true-653   [000]   384.675988: sys_exit:             NR 983045 = 0
 ...

 # trace-cmd record -e syscalls:* true
 [   17.289329] Unable to handle kernel paging request at virtual address aaaaaace
 [   17.289590] pgd = 9e71c000
 [   17.289696] [aaaaaace] *pgd=00000000
 [   17.289985] Internal error: Oops: 5 [#1] PREEMPT SMP ARM
 [   17.290169] Modules linked in:
 [   17.290391] CPU: 0 PID: 704 Comm: true Not tainted 3.18.0-rc2+ #21
 [   17.290585] task: 9f4dab00 ti: 9e710000 task.ti: 9e710000
 [   17.290747] PC is at ftrace_syscall_enter+0x48/0x1f8
 [   17.290866] LR is at syscall_trace_enter+0x124/0x184

Fix this by ignoring out-of-NR_syscalls-bounds syscall numbers.

Commit cd0980fc8add "tracing: Check invalid syscall nr while tracing syscalls"
added the check for less than zero, but it should have also checked
for greater than NR_syscalls.

Link: http://lkml.kernel.org/p/1414620418-29472-1-git-send-email-rabin@rab.in
Fixes: cd0980fc8add "tracing: Check invalid syscall nr while tracing syscalls"
Cc: stable@vger.kernel.org # 2.6.33+
Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
9 years agoMerge branch 'ufo-fix'
David S. Miller [Fri, 31 Oct 2014 00:01:27 +0000 (20:01 -0400)]
Merge branch 'ufo-fix'

Ben Hutchings says:

====================
drivers/net,ipv6: Fix IPv6 fragment ID selection for virtio

The virtio net protocol supports UFO but does not provide for passing a
fragment ID for fragmentation of IPv6 packets.  We used to generate a
fragment ID wherever such a packet was fragmented, but currently we
always use ID=0!

v2: Add blank lines after declarations
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agodrivers/net, ipv6: Select IPv6 fragment idents for virtio UFO packets
Ben Hutchings [Thu, 30 Oct 2014 18:27:17 +0000 (18:27 +0000)]
drivers/net, ipv6: Select IPv6 fragment idents for virtio UFO packets

UFO is now disabled on all drivers that work with virtio net headers,
but userland may try to send UFO/IPv6 packets anyway.  Instead of
sending with ID=0, we should select identifiers on their behalf (as we
used to).

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Fixes: 916e4cf46d02 ("ipv6: reuse ip6_frag_id from ip6_ufo_append_data")
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agodrivers/net: Disable UFO through virtio
Ben Hutchings [Thu, 30 Oct 2014 18:27:12 +0000 (18:27 +0000)]
drivers/net: Disable UFO through virtio

IPv6 does not allow fragmentation by routers, so there is no
fragmentation ID in the fixed header.  UFO for IPv6 requires the ID to
be passed separately, but there is no provision for this in the virtio
net protocol.

Until recently our software implementation of UFO/IPv6 generated a new
ID, but this was a bug.  Now we will use ID=0 for any UFO/IPv6 packet
passed through a tap, which is even worse.

Unfortunately there is no distinction between UFO/IPv4 and v6
features, so disable UFO on taps and virtio_net completely until we
have a proper solution.

We cannot depend on VM managers respecting the tap feature flags, so
keep accepting UFO packets but log a warning the first time we do
this.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Fixes: 916e4cf46d02 ("ipv6: reuse ip6_frag_id from ip6_ufo_append_data")
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agonet: skb_fclone_busy() needs to detect orphaned skb
Eric Dumazet [Thu, 30 Oct 2014 17:32:34 +0000 (10:32 -0700)]
net: skb_fclone_busy() needs to detect orphaned skb

Some drivers are unable to perform TX completions in a bound time.
They instead call skb_orphan()

Problem is skb_fclone_busy() has to detect this case, otherwise
we block TCP retransmits and can freeze unlucky tcp sessions on
mostly idle hosts.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Fixes: 1f3279ae0c13 ("tcp: avoid retransmits of TCP packets hanging in host queues")
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agogre: Use inner mac length when computing tunnel length
Tom Herbert [Thu, 30 Oct 2014 15:40:56 +0000 (08:40 -0700)]
gre: Use inner mac length when computing tunnel length

Currently, skb_inner_network_header is used but this does not account
for Ethernet header for ETH_P_TEB. Use skb_inner_mac_header which
handles TEB and also should work with IP encapsulation in which case
inner mac and inner network headers are the same.

Tested: Ran TCP_STREAM over GRE, worked as expected.

Signed-off-by: Tom Herbert <therbert@google.com>
Acked-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoMerge branch 'mellanox-net'
David S. Miller [Thu, 30 Oct 2014 23:49:20 +0000 (19:49 -0400)]
Merge branch 'mellanox-net'

Or Gerlitz says:

====================
mlx4 driver encapsulation/steering fixes

The 1st patch fixes a bug in the TX path that supports offloading the
TX checksum of (VXLAN) encapsulated TCP packets. It turns out that the
bug is revealed only when the receiver runs in non-offloaded mode, so
we somehow missed it so far... please queue it for -stable >= 3.14

The 2nd patch makes sure not to leak steering entry on error flow,
please queue it to 3.17-stable
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agomlx4: Avoid leaking steering rules on flow creation error flow
Or Gerlitz [Thu, 30 Oct 2014 13:59:28 +0000 (15:59 +0200)]
mlx4: Avoid leaking steering rules on flow creation error flow

If mlx4_ib_create_flow() attempts to create > 1 rules with the
firmware, and one of these registrations fail, we leaked the
already created flow rules.

One example of the leak is when the registration of the VXLAN ghost
steering rule fails, we didn't unregister the original rule requested
by the user, introduced in commit d2fce8a9060d "mlx4: Set
user-space raw Ethernet QPs to properly handle VXLAN traffic".

While here, add dump of the VXLAN portion of steering rules
so it can actually be seen when flow creation fails.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agonet/mlx4_en: Don't attempt to TX offload the outer UDP checksum for VXLAN
Or Gerlitz [Thu, 30 Oct 2014 13:59:27 +0000 (15:59 +0200)]
net/mlx4_en: Don't attempt to TX offload the outer UDP checksum for VXLAN

For VXLAN/NVGRE encapsulation, the current HW doesn't support offloading
both the outer UDP TX checksum and the inner TCP/UDP TX checksum.

The driver doesn't advertize SKB_GSO_UDP_TUNNEL_CSUM, however we are wrongly
telling the HW to offload the outer UDP checksum for encapsulated packets,
fix that.

Fixes: 837052d0ccc5 ('net/mlx4_en: Add netdev support for TCP/IP
     offloads of vxlan tunneling')
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoMerge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net
David S. Miller [Thu, 30 Oct 2014 23:46:33 +0000 (19:46 -0400)]
Merge branch 'master' of git://git./linux/kernel/git/jkirsher/net

Jeff Kirsher says:

====================
Intel Wired LAN Driver Updates 2014-10-30

This series contains updates to e1000, igb and ixgbe.

Francesco Ruggeri fixes an issue with e1000 where in a VM the driver did
not support unicast filtering.

Roman Gushchin fixes an issue with igb where the driver was re-using
mapped pages so that packets were still getting dropped even if all
the memory issues are gone and there is free memory.

Junwei Zhang found where in the ixgbe_clean_rx_ring() we were repeating
the assignment of NULL to the receive buffer skb and fixes it.

Emil fixes a race condition between setup_link and SFP detection routine
in the watchdog when setting the advertised speed.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoipv4: Do not cache routing failures due to disabled forwarding.
Nicolas Cavallari [Thu, 30 Oct 2014 09:09:53 +0000 (10:09 +0100)]
ipv4: Do not cache routing failures due to disabled forwarding.

If we cache them, the kernel will reuse them, independently of
whether forwarding is enabled or not.  Which means that if forwarding is
disabled on the input interface where the first routing request comes
from, then that unreachable result will be cached and reused for
other interfaces, even if forwarding is enabled on them.  The opposite
is also true.

This can be verified with two interfaces A and B and an output interface
C, where B has forwarding enabled, but not A and trying
ip route get $dst iif A from $src && ip route get $dst iif B from $src

Signed-off-by: Nicolas Cavallari <nicolas.cavallari@green-communications.fr>
Reviewed-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agofs: allow open(dir, O_TMPFILE|..., 0) with mode 0
Eric Rannaud [Thu, 30 Oct 2014 08:51:01 +0000 (01:51 -0700)]
fs: allow open(dir, O_TMPFILE|..., 0) with mode 0

The man page for open(2) indicates that when O_CREAT is specified, the
'mode' argument applies only to future accesses to the file:

Note that this mode applies only to future accesses of the newly
created file; the open() call that creates a read-only file
may well return a read/write file descriptor.

The man page for open(2) implies that 'mode' is treated identically by
O_CREAT and O_TMPFILE.

O_TMPFILE, however, behaves differently:

int fd = open("/tmp", O_TMPFILE | O_RDWR, 0);
assert(fd == -1);
assert(errno == EACCES);

int fd = open("/tmp", O_TMPFILE | O_RDWR, 0600);
assert(fd > 0);

For O_CREAT, do_last() sets acc_mode to MAY_OPEN only:

if (*opened & FILE_CREATED) {
/* Don't check for write permission, don't truncate */
open_flag &= ~O_TRUNC;
will_truncate = false;
acc_mode = MAY_OPEN;
path_to_nameidata(path, nd);
goto finish_open_created;
}

But for O_TMPFILE, do_tmpfile() passes the full op->acc_mode to
may_open().

This patch lines up the behavior of O_TMPFILE with O_CREAT. After the
inode is created, may_open() is called with acc_mode = MAY_OPEN, in
do_tmpfile().

A different, but related glibc bug revealed the discrepancy:
https://sourceware.org/bugzilla/show_bug.cgi?id=17523

The glibc lazily loads the 'mode' argument of open() and openat() using
va_arg() only if O_CREAT is present in 'flags' (to support both the 2
argument and the 3 argument forms of open; same idea for openat()).
However, the glibc ignores the 'mode' argument if O_TMPFILE is in
'flags'.

On x86_64, for open(), it magically works anyway, as 'mode' is in
RDX when entering open(), and is still in RDX on SYSCALL, which is where
the kernel looks for the 3rd argument of a syscall.

But openat() is not quite so lucky: 'mode' is in RCX when entering the
glibc wrapper for openat(), while the kernel looks for the 4th argument
of a syscall in R10. Indeed, the syscall calling convention differs from
the regular calling convention in this respect on x86_64. So the kernel
sees mode = 0 when trying to use glibc openat() with O_TMPFILE, and
fails with EACCES.

Signed-off-by: Eric Rannaud <e@nanocritical.com>
Acked-by: Andy Lutomirski <luto@amacapital.net>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agoMerge branch 'drm-fixes-3.18' of git://people.freedesktop.org/~agd5f/linux into drm...
Dave Airlie [Thu, 30 Oct 2014 20:54:51 +0000 (06:54 +1000)]
Merge branch 'drm-fixes-3.18' of git://people.freedesktop.org/~agd5f/linux into drm-fixes

- dpm stability fixes for SI and KV
- remove an invalid pci id
- kmalloc_array fixes
- minor cleanups

* 'drm-fixes-3.18' of git://people.freedesktop.org/~agd5f/linux:
  drm/radeon: remove some buggy dead code
  drm/radeon: remove invalid pci id
  drm/radeon: dpm fixes for asrock systems
  radeon: clean up coding style differences in radeon_get_bios()
  drm/radeon: Use drm_malloc_ab instead of kmalloc_array
  drm/radeon/dpm: disable ulv support on SI

9 years agoMerge tag 'drm-intel-fixes-2014-10-30' of git://anongit.freedesktop.org/drm-intel...
Dave Airlie [Thu, 30 Oct 2014 20:54:10 +0000 (06:54 +1000)]
Merge tag 'drm-intel-fixes-2014-10-30' of git://anongit.freedesktop.org/drm-intel into drm-fixes

bunch of DP fixes, and some backlight fix.

* tag 'drm-intel-fixes-2014-10-30' of git://anongit.freedesktop.org/drm-intel:
  drm/i915/dp: only use training pattern 3 on platforms that support it
  drm/i915: Ignore VBT backlight check on Macbook 2, 1
  drm/i915: Fix GMBUSFREQ on vlv/chv
  drm/i915: Ignore long hpds on eDP ports
  drm/i915: Do a dummy DPCD read before the actual read

9 years agocxgb4 : Fix missing initialization of win0_lock
Anish Bhatt [Thu, 30 Oct 2014 00:54:03 +0000 (17:54 -0700)]
cxgb4 : Fix missing initialization of win0_lock

win0_lock was being used un-initialized, resulting in warning traces
being seen when lock debugging is enabled (and just wrong)

Fixes : fc5ab0209650 ('cxgb4: Replaced the backdoor mechanism to access the HW
 memory with PCIe Window method')

Signed-off-by: Anish Bhatt <anish@chelsio.com>
Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agoMerge branch 'r8152-net'
David S. Miller [Thu, 30 Oct 2014 19:49:05 +0000 (15:49 -0400)]
Merge branch 'r8152-net'

Hayes Wang says:

====================
r8152: patches for autosuspend

There are unexpected processes when enabling autosuspend.
These patches are used to fix them.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agor8152: check WORK_ENABLE in suspend function
hayeswang [Wed, 29 Oct 2014 03:12:17 +0000 (11:12 +0800)]
r8152: check WORK_ENABLE in suspend function

Avoid unnecessary behavior when autosuspend occurs during open().
The relative processes should only be run after finishing open().

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agor8152: reset tp->speed before autoresuming in open function
hayeswang [Wed, 29 Oct 2014 03:12:16 +0000 (11:12 +0800)]
r8152: reset tp->speed before autoresuming in open function

If (tp->speed & LINK_STATUS) is not zero, the rtl8152_resume()
would call rtl_start_rx() before enabling the tx/rx. Avoid this
by resetting it to zero.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agor8152: clear SELECTIVE_SUSPEND when autoresuming
hayeswang [Wed, 29 Oct 2014 03:12:15 +0000 (11:12 +0800)]
r8152: clear SELECTIVE_SUSPEND when autoresuming

The flag of SELECTIVE_SUSPEND should be cleared when autoresuming.
Otherwise, when the system suspend and resume occur, it may have
the wrong flow.

Besides, because the flag of SELECTIVE_SUSPEND couldn't be used
to check if the hw enables the relative feature, it should alwayes
be disabled in close().

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9 years agortlwifi: rtl8192se: Fix firmware loading
Larry Finger [Thu, 30 Oct 2014 04:17:13 +0000 (23:17 -0500)]
rtlwifi: rtl8192se: Fix firmware loading

An error in the code makes the allocated space for firmware to be too
small.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Murilo Opsfelder Araujo <mopsfelder@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
9 years agortlwifi: rtl8192ce: Add missing section to read descriptor setting
Larry Finger [Thu, 30 Oct 2014 04:17:11 +0000 (23:17 -0500)]
rtlwifi: rtl8192ce: Add missing section to read descriptor setting

The new version of rtlwifi needs code in rtl92ce_get_desc() that returns
the buffer address for read operations.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Murilo Opsfelder Araujo <mopsfelder@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
9 years agortlwifi: rtl8192se: Add missing section to read descriptor setting
Larry Finger [Thu, 30 Oct 2014 04:17:10 +0000 (23:17 -0500)]
rtlwifi: rtl8192se: Add missing section to read descriptor setting

The new version of rtlwifi needs code in rtl92se_get_desc() that returns
the buffer address for read operations.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Murilo Opsfelder Araujo <mopsfelder@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
9 years agortlwifi: rtl8192se: Fix duplicate calls to ieee80211_register_hw()
Larry Finger [Thu, 30 Oct 2014 04:17:09 +0000 (23:17 -0500)]
rtlwifi: rtl8192se: Fix duplicate calls to ieee80211_register_hw()

Driver rtlwifi has been modified to call ieee80211_register_hw()
from the probe routine; however, the existing call in the callback
routine for deferred firmware loading was not removed.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Murilo Opsfelder Araujo <mopsfelder@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
9 years agortlwifi: rtl8192ce: rtl8192de: rtl8192se: Fix handling for missing get_btc_status
Larry Finger [Thu, 30 Oct 2014 04:17:08 +0000 (23:17 -0500)]
rtlwifi: rtl8192ce: rtl8192de: rtl8192se: Fix handling for missing get_btc_status

The recent changes in checking for Bluetooth status added some callbacks to code
in rtlwifi. To make certain that all callbacks are defined, a dummy routine has been
added to rtlwifi, and the drivers that need to use it are modified.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Murilo Opsfelder Araujo <mopsfelder@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
9 years agomwifiex: restart rxreorder timer correctly
Marc Yang [Wed, 29 Oct 2014 17:14:34 +0000 (22:44 +0530)]
mwifiex: restart rxreorder timer correctly

During 11n RX reordering, if there is a hole in RX table,
driver will not send packets to kernel until the rxreorder
timer expires or the table is full.
However, currently driver always restarts rxreorder timer when
receiving a packet, which causes the timer hardly to expire.
So while connected with to 11n AP in a busy environment,
ping packets may get blocked for about 30 seconds.

This patch fixes this timer restarting by ensuring rxreorder timer
would only be restarted either timer is not set or start_win
has changed.

Signed-off-by: Chin-Ran Lo <crlo@marvell.com>
Signed-off-by: Plus Chen <pchen@marvell.com>
Signed-off-by: Marc Yang <yangyang@marvell.com>
Signed-off-by: Cathy Luo <cluo@marvell.com>
Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
9 years agoath9k: fix some debugfs output
Dan Carpenter [Wed, 29 Oct 2014 15:48:05 +0000 (18:48 +0300)]
ath9k: fix some debugfs output

The right shift operation has higher precedence than the mask so we
left shift by "(i * 3)" and then immediately right shift by "(i * 3)"
then we mask.  It should be left shift, mask, and then right shift.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
9 years agowireless: rt2x00: add new rt2800usb device
Cyril Brulebois [Tue, 28 Oct 2014 15:42:41 +0000 (16:42 +0100)]
wireless: rt2x00: add new rt2800usb device

0x1b75 0xa200 AirLive WN-200USB wireless 11b/g/n dongle

References: https://bugs.debian.org/766802
Reported-by: Martin Mokrejs <mmokrejs@fold.natur.cuni.cz>
Cc: stable@vger.kernel.org
Signed-off-by: Cyril Brulebois <kibi@debian.org>
Acked-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
9 years ago[media] ds3000: fix LNB supply voltage on Tevii S480 on initialization
Ulrich Eckhardt [Fri, 10 Oct 2014 17:19:12 +0000 (14:19 -0300)]
[media] ds3000: fix LNB supply voltage on Tevii S480 on initialization

The Tevii S480 outputs 18V on startup for the LNB supply voltage and does not
automatically power down. This blocks other receivers connected
to a satellite channel router (EN50494), since the receivers can not send the
required DiSEqC sequences when the Tevii card is connected to a the same SCR.

This patch switches off the LNB supply voltage on initialization of the frontend.

[mchehab@osg.samsung.com: add a comment about why we're explicitly
 turning off voltage at device init]
Cc: stable@vger.kernel.org
Signed-off-by: Ulrich Eckhardt <uli@uli-eckhardt.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
9 years agoPCI: Rename sysfs 'enabled' file back to 'enable'
Greg Kroah-Hartman [Thu, 30 Oct 2014 16:30:28 +0000 (09:30 -0700)]
PCI: Rename sysfs 'enabled' file back to 'enable'

Back in commit 5136b2da770d ("PCI: convert bus code to use dev_groups"),
I misstyped the 'enable' sysfs filename as 'enabled', which broke the
userspace API.  This patch fixes that issue by renaming the file back.

Fixes: 5136b2da770d ("PCI: convert bus code to use dev_groups")
Reported-by: Jeff Epler <jepler@unpythonic.net>
Tested-by: Jeff Epler <jepler@unpythonic.net> # on v3.14-rt
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: stable@vger.kernel.org # 3.13
9 years agoMerge tag 'fbdev-fixes-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba...
Linus Torvalds [Thu, 30 Oct 2014 16:34:35 +0000 (09:34 -0700)]
Merge tag 'fbdev-fixes-3.18' of git://git./linux/kernel/git/tomba/linux

Pull fbdev fixes from Tomi Valkeinen:

 - fix fb console option parsing

 - fixes for OMAPDSS/OMAPFB crashes related to module unloading and
   device/driver binding & unbinding.

 - fix for OMAP HDMI PLL locking failing in certain cases

 - misc minor fixes for atmel lcdfb and OMAP

* tag 'fbdev-fixes-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux:
  omap: dss: connector-analog-tv: Add missing module device table
  OMAPDSS: DSI: Fix PLL_SELFEQDCO field width
  OMAPDSS: fix dispc register dump for preload & mflag
  OMAPDSS: DISPC: fix mflag offset
  OMAPDSS: HDMI: fix regsd write
  OMAPDSS: HDMI: fix PLL GO bit handling
  OMAPFB: fix releasing overlays
  OMAPFB: fix overlay disable when freeing resources.
  OMAPDSS: apply: wait pending updates on manager disable
  OMAPFB: remove __exit annotation
  OMAPDSS: set suppress_bind_attrs
  OMAPFB: add missing MODULE_ALIAS()
  drivers: video: fbdev: atmel_lcdfb.c: remove unnecessary header
  video/console: Resolve several shadow warnings
  fbcon: Fix option parsing control flow in fb_console_setup

9 years agoarm64: psci: fix cpu_suspend to check idle state type for index
Amit Daniel Kachhap [Thu, 30 Oct 2014 12:24:51 +0000 (12:24 +0000)]
arm64: psci: fix cpu_suspend to check idle state type for index

This fix rectifies the psci cpu_suspend implementation to check the
PSCI power state parameter type field associated with the requested idle
state index.

Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Amit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
9 years agoMerge tag 'sound-3.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai...
Linus Torvalds [Thu, 30 Oct 2014 16:11:38 +0000 (09:11 -0700)]
Merge tag 'sound-3.18-rc3' of git://git./linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "Although the diffstat looks scary, it's just because of the removal of
  the dead code (s6000), thus it must not affect anything serious.

  Other than that, all small fixes.  The only core fix is zero-clear for
  a PCM compat ioctl.  The rest are driver-specific, bebob, sgtl500,
  adau1761, intel-sst, ad1889 and a few HD-audio quirks as usual"

* tag 'sound-3.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda - Add workaround for CMI8888 snoop behavior
  ALSA: pcm: Zero-clear reserved fields of PCM status ioctl in compat mode
  ALSA: bebob: Uninitialized id returned by saffirepro_both_clk_src_get
  ALSA: hda/realtek - New SSID for Headset quirk
  ALSA: ad1889: Fix probable mask then right shift defects
  ALSA: bebob: fix wrong decoding of clock information for Terratec PHASE 88 Rack FW
  ALSA: hda/realtek - Update restore default value for ALC283
  ALSA: hda/realtek - Update restore default value for ALC282
  ASoC: fsl: use strncpy() to prevent copying of over-long names
  ASoC: adau1761: Fix input PGA volume
  ASoC: s6000: remove driver
  ASoC: Intel: HSW/BDW only support S16 and S24 formats.
  ASoC: sgtl500: Document the required supplies

9 years agoMAINTAINERS: drop list entry for davinci
Lad, Prabhakar [Wed, 29 Oct 2014 09:44:21 +0000 (09:44 +0000)]
MAINTAINERS: drop list entry for davinci

As davinci-linux-open-source@linux.davincidsp.com is now
shut and no more maintained by TI, drop this entry from
DAVINCI MACHINE SUPPORT and DAVINCI SERIES MEDIA DRIVER.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Cc: arm@kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Acked-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Kevin Hilman <khilman@linaro.org>
9 years agoext4: make ext4_ext_convert_to_initialized() return proper number of blocks
Jan Kara [Thu, 30 Oct 2014 14:53:17 +0000 (10:53 -0400)]
ext4: make ext4_ext_convert_to_initialized() return proper number of blocks

ext4_ext_convert_to_initialized() can return more blocks than are
actually allocated from map->m_lblk in case where initial part of the
on-disk extent is zeroed out. Luckily this doesn't have serious
consequences because the caller currently uses the return value
only to unmap metadata buffers. Anyway this is a data
corruption/exposure problem waiting to happen so fix it.

Coverity-id: 1226848
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
9 years agoext4: bail early when clearing inode journal flag fails
Jan Kara [Thu, 30 Oct 2014 14:53:17 +0000 (10:53 -0400)]
ext4: bail early when clearing inode journal flag fails

When clearing inode journal flag, we call jbd2_journal_flush() to force
all the journalled data to their final locations. Currently we ignore
when this fails and continue clearing inode journal flag. This isn't a
big problem because when jbd2_journal_flush() fails, journal is likely
aborted anyway. But it can still lead to somewhat confusing results so
rather bail out early.

Coverity-id: 989044
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
9 years agoext4: bail out from make_indexed_dir() on first error
Jan Kara [Thu, 30 Oct 2014 14:53:17 +0000 (10:53 -0400)]
ext4: bail out from make_indexed_dir() on first error

When ext4_handle_dirty_dx_node() or ext4_handle_dirty_dirent_node()
fail, there's really something wrong with the fs and there's no point in
continuing further. Just return error from make_indexed_dir() in that
case. Also initialize frames array so that if we return early due to
error, dx_release() doesn't try to dereference uninitialized memory
(which could happen also due to error in do_split()).

Coverity-id: 741300
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@vger.kernel.org
9 years agojbd2: use a better hash function for the revoke table
Theodore Ts'o [Thu, 30 Oct 2014 14:53:17 +0000 (10:53 -0400)]
jbd2: use a better hash function for the revoke table

The old hash function didn't work well for 64-bit block numbers, and
used undefined (negative) shift right behavior.  Use the generic
64-bit hash function instead.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reported-by: Andrey Ryabinin <a.ryabinin@samsung.com>
9 years agoext4: prevent bugon on race between write/fcntl
Dmitry Monakhov [Thu, 30 Oct 2014 14:53:16 +0000 (10:53 -0400)]
ext4: prevent bugon on race between write/fcntl

O_DIRECT flags can be toggeled via fcntl(F_SETFL). But this value checked
twice inside ext4_file_write_iter() and __generic_file_write() which
result in BUG_ON inside ext4_direct_IO.

Let's initialize iocb->private unconditionally.

TESTCASE: xfstest:generic/036  https://patchwork.ozlabs.org/patch/402445/

#TYPICAL STACK TRACE:
kernel BUG at fs/ext4/inode.c:2960!
invalid opcode: 0000 [#1] SMP
Modules linked in: brd iTCO_wdt lpc_ich mfd_core igb ptp dm_mirror dm_region_hash dm_log dm_mod
CPU: 6 PID: 5505 Comm: aio-dio-fcntl-r Not tainted 3.17.0-rc2-00176-gff5c017 #161
Hardware name: Intel Corporation W2600CR/W2600CR, BIOS SE5C600.86B.99.99.x028.061320111235 06/13/2011
task: ffff88080e95a7c0 ti: ffff88080f908000 task.ti: ffff88080f908000
RIP: 0010:[<ffffffff811fabf2>]  [<ffffffff811fabf2>] ext4_direct_IO+0x162/0x3d0
RSP: 0018:ffff88080f90bb58  EFLAGS: 00010246
RAX: 0000000000000400 RBX: ffff88080fdb2a28 RCX: 00000000a802c818
RDX: 0000040000080000 RSI: ffff88080d8aeb80 RDI: 0000000000000001
RBP: ffff88080f90bbc8 R08: 0000000000000000 R09: 0000000000001581
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88080d8aeb80
R13: ffff88080f90bbf8 R14: ffff88080fdb28c8 R15: ffff88080fdb2a28
FS:  00007f23b2055700(0000) GS:ffff880818400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f23b2045000 CR3: 000000080cedf000 CR4: 00000000000407e0
Stack:
 ffff88080f90bb98 0000000000000000 7ffffffffffffffe ffff88080fdb2c30
 0000000000000200 0000000000000200 0000000000000001 0000000000000200
 ffff88080f90bbc8 ffff88080fdb2c30 ffff88080f90be08 0000000000000200
Call Trace:
 [<ffffffff8112ca9d>] generic_file_direct_write+0xed/0x180
 [<ffffffff8112f2b2>] __generic_file_write_iter+0x222/0x370
 [<ffffffff811f495b>] ext4_file_write_iter+0x34b/0x400
 [<ffffffff811bd709>] ? aio_run_iocb+0x239/0x410
 [<ffffffff811bd709>] ? aio_run_iocb+0x239/0x410
 [<ffffffff810990e5>] ? local_clock+0x25/0x30
 [<ffffffff810abd94>] ? __lock_acquire+0x274/0x700
 [<ffffffff811f4610>] ? ext4_unwritten_wait+0xb0/0xb0
 [<ffffffff811bd756>] aio_run_iocb+0x286/0x410
 [<ffffffff810990e5>] ? local_clock+0x25/0x30
 [<ffffffff810ac359>] ? lock_release_holdtime+0x29/0x190
 [<ffffffff811bc05b>] ? lookup_ioctx+0x4b/0xf0
 [<ffffffff811bde3b>] do_io_submit+0x55b/0x740
 [<ffffffff811bdcaa>] ? do_io_submit+0x3ca/0x740
 [<ffffffff811be030>] SyS_io_submit+0x10/0x20
 [<ffffffff815ce192>] system_call_fastpath+0x16/0x1b
Code: 01 48 8b 80 f0 01 00 00 48 8b 18 49 8b 45 10 0f 85 f1 01 00 00 48 03 45 c8 48 3b 43 48 0f 8f e3 01 00 00 49 83 7c
24 18 00 75 04 <0f> 0b eb fe f0 ff 83 ec 01 00 00 49 8b 44 24 18 8b 00 85 c0 89
RIP  [<ffffffff811fabf2>] ext4_direct_IO+0x162/0x3d0
 RSP <ffff88080f90bb58>

Reported-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Cc: stable@vger.kernel.org
9 years agoext4: remove extent status procfs files if journal load fails
Darrick J. Wong [Thu, 30 Oct 2014 14:53:16 +0000 (10:53 -0400)]
ext4: remove extent status procfs files if journal load fails

If we can't load the journal, remove the procfs files for the extent
status information file to avoid leaking resources.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@vger.kernel.org
9 years agoext4: disallow changing journal_csum option during remount
Darrick J. Wong [Thu, 30 Oct 2014 14:53:16 +0000 (10:53 -0400)]
ext4: disallow changing journal_csum option during remount

ext4 does not permit changing the metadata or journal checksum feature
flag while mounted.  Until we decide to support that, don't allow a
remount to change the journal_csum flag (right now we silently fail to
change anything).

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
9 years agoext4: enable journal checksum when metadata checksum feature enabled
Darrick J. Wong [Thu, 30 Oct 2014 14:53:16 +0000 (10:53 -0400)]
ext4: enable journal checksum when metadata checksum feature enabled

If metadata checksumming is turned on for the FS, we need to tell the
journal to use checksumming too.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@vger.kernel.org
9 years agoext4: fix oops when loading block bitmap failed
Jan Kara [Thu, 30 Oct 2014 14:53:16 +0000 (10:53 -0400)]
ext4: fix oops when loading block bitmap failed

When we fail to load block bitmap in __ext4_new_inode() we will
dereference NULL pointer in ext4_journal_get_write_access(). So check
for error from ext4_read_block_bitmap().

Coverity-id: 989065
Cc: stable@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
9 years agoext4: fix overflow when updating superblock backups after resize
Jan Kara [Thu, 30 Oct 2014 14:52:57 +0000 (10:52 -0400)]
ext4: fix overflow when updating superblock backups after resize

When there are no meta block groups update_backups() will compute the
backup block in 32-bit arithmetics thus possibly overflowing the block
number and corrupting the filesystem. OTOH filesystems without meta
block groups larger than 16 TB should be rare. Fix the problem by doing
the counting in 64-bit arithmetics.

Coverity-id: 741252
CC: stable@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Lukas Czerner <lczerner@redhat.com>
9 years agodrm/i915/dp: only use training pattern 3 on platforms that support it
Jani Nikula [Wed, 29 Oct 2014 09:03:26 +0000 (11:03 +0200)]
drm/i915/dp: only use training pattern 3 on platforms that support it

Ivybridge + 30" monitor prints a drm error on every modeset, since IVB
doesn't support DP3 we should even bother trying to use it.

This regression has been introduced in

commit 06ea66b6bb445043dc25a9626254d5c130093199
Author: Todd Previte <tprevite@gmail.com>
Date:   Mon Jan 20 10:19:39 2014 -0700

    drm/i915: Enable 5.4Ghz (HBR2) link rate for Displayport 1.2-capable
devices

Reported-by: Dave Airlie <airlied@redhat.com>
Reference: http://mid.gmane.org/1414566170-9868-1-git-send-email-airlied@gmail.com
Cc: Todd Previte <tprevite@gmail.com>
Cc: stable@vger.kernel.org (3.15+)
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
9 years agoMerge branch '3.18/omapdss-fixes' into 3.18/fbdev-fixes
Tomi Valkeinen [Thu, 30 Oct 2014 12:53:49 +0000 (14:53 +0200)]
Merge branch '3.18/omapdss-fixes' into 3.18/fbdev-fixes

9 years agoomap: dss: connector-analog-tv: Add missing module device table
Marek Belisko [Mon, 27 Oct 2014 20:24:03 +0000 (21:24 +0100)]
omap: dss: connector-analog-tv: Add missing module device table

Without that fix connector-analog-tv driver isn't probed when compiled
as module.

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
9 years agoixgbe: fix race when setting advertised speed
Emil Tantilov [Tue, 28 Oct 2014 05:50:03 +0000 (05:50 +0000)]
ixgbe: fix race when setting advertised speed

Following commands:

modprobe ixgbe
ifconfig ethX up
ethtool -s ethX advertise 0x020

can lead to "setup link failed with code -14" error due to the setup_link
call racing with the SFP detection routine in the watchdog.

This patch resolves this issue by protecting the setup_link call with check
for __IXGBE_IN_SFP_INIT.

Reported-by: Scott Harrison <scoharr2@cisco.com>
Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
9 years agoixgbe: need not repeat init skb with NULL
Junwei Zhang [Wed, 22 Oct 2014 15:29:03 +0000 (15:29 +0000)]
ixgbe: need not repeat init skb with NULL

Signed-off-by: Martin Zhang <martinbj2008@gmail.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
9 years agoigb: don't reuse pages with pfmemalloc flag
Roman Gushchin [Thu, 23 Oct 2014 03:32:27 +0000 (03:32 +0000)]
igb: don't reuse pages with pfmemalloc flag

Incoming packet is dropped silently by sk_filter(), if the skb was
allocated from pfmemalloc reserves and the corresponding socket is
not marked with the SOCK_MEMALLOC flag.

Igb driver allocates pages for DMA with __skb_alloc_page(), which
calls alloc_pages_node() with the __GFP_MEMALLOC flag. So, in case
of OOM condition, igb can get pages with pfmemalloc flag set.

If an incoming packet hits the pfmemalloc page and is large enough
(small packets are copying into the memory, allocated with
netdev_alloc_skb_ip_align(), so they are not affected), it will be
dropped.

This behavior is ok under high memory pressure, but the problem is
that the igb driver reuses these mapped pages. So, packets are still
dropping even if all memory issues are gone and there is a plenty
of free memory.

In my case, some TCP sessions hang on a small percentage (< 0.1%)
of machines days after OOMs.

Fix this by avoiding reuse of such pages.

Signed-off-by: Roman Gushchin <klamm@yandex-team.ru>
Tested-by: Aaron Brown "aaron.f.brown@intel.com"
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
9 years agoe1000: unset IFF_UNICAST_FLT on WMware 82545EM
Francesco Ruggeri [Wed, 22 Oct 2014 15:29:24 +0000 (15:29 +0000)]
e1000: unset IFF_UNICAST_FLT on WMware 82545EM

VMWare's e1000 implementation does not seem to support unicast filtering.
This can be observed by configuring a macvlan interface on eth0 in a VM in
VMWare Fusion 5.0.5, and trying to use that interface instead of eth0.
Tested on 3.16.

Signed-off-by: Francesco Ruggeri <fruggeri@arista.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
9 years ago[media] rc5-decoder: BZ#85721: Fix RC5-SZ decoding
Mauro Carvalho Chehab [Thu, 30 Oct 2014 09:54:12 +0000 (06:54 -0300)]
[media] rc5-decoder: BZ#85721: Fix RC5-SZ decoding

Changeset e87b540be2dd broke RC5-SZ decoding, as it forgot to add
the extra bit check for the enabled protocols at the beginning of
the logic.

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: David Härdeman <david@hardeman.nu>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
9 years ago[media] rc-core: fix protocol_change regression in ir_raw_event_register
Tomas Melin [Tue, 28 Oct 2014 18:43:14 +0000 (15:43 -0300)]
[media] rc-core: fix protocol_change regression in ir_raw_event_register

IR receiver using nuvoton-cir and lirc required additional configuration
steps after upgrade from kernel 3.16 to 3.17-rcX. Bisected regression to
commit da6e162d6a4607362f8478c715c797d84d449f8b ("[media] rc-core:
simplify sysfs code").

The regression comes from adding function change_protocol in ir-raw.c.
It changes behaviour so that only the protocol enabled by driver's
map_name will be active after registration. This breaks user space
behaviour, lirc does not get key press signals anymore.

Enable lirc protocol by default for ir raw decoders to restore original
behaviour.

Cc: stable@vger.kernel.org # for v3.17
Signed-off-by: Tomas Melin <tomas.melin@iki.fi>
Acked-by: David Härdeman <david@hardeman.nu>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
9 years agorbd: Fix error recovery in rbd_obj_read_sync()
Jan Kara [Wed, 22 Oct 2014 07:17:24 +0000 (09:17 +0200)]
rbd: Fix error recovery in rbd_obj_read_sync()

When we fail to allocate page vector in rbd_obj_read_sync() we just
basically ignore the problem and continue which will result in an oops
later. Fix the problem by returning proper error.

CC: Yehuda Sadeh <yehuda@inktank.com>
CC: Sage Weil <sage@inktank.com>
CC: ceph-devel@vger.kernel.org
CC: stable@vger.kernel.org
Coverity-id: 1226882
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Ilya Dryomov <idryomov@redhat.com>
9 years agolibceph: use memalloc flags for net IO
Mike Christie [Thu, 16 Oct 2014 06:50:19 +0000 (01:50 -0500)]
libceph: use memalloc flags for net IO

This patch has ceph's lib code use the memalloc flags.

If the VM layer needs to write data out to free up memory to handle new
allocation requests, the block layer must be able to make forward progress.
To handle that requirement we use structs like mempools to reserve memory for
objects like bios and requests.

The problem is when we send/receive block layer requests over the network
layer, net skb allocations can fail and the system can lock up.
To solve this, the memalloc related flags were added. NBD, iSCSI
and NFS uses these flags to tell the network/vm layer that it should
use memory reserves to fullfill allcation requests for structs like
skbs.

I am running ceph in a bunch of VMs in my laptop, so this patch was
not tested very harshly.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Reviewed-by: Ilya Dryomov <idryomov@redhat.com>
9 years agorbd: use a single workqueue for all devices
Ilya Dryomov [Thu, 9 Oct 2014 13:06:01 +0000 (17:06 +0400)]
rbd: use a single workqueue for all devices

Using one queue per device doesn't make much sense given that our
workfn processes "devices" and not "requests".  Switch to a single
workqueue for all devices.

Signed-off-by: Ilya Dryomov <idryomov@redhat.com>
Reviewed-by: Sage Weil <sage@redhat.com>
9 years agoALSA: hda/realtek - Update Initial AMP for EAPD control
Kailang Yang [Wed, 29 Oct 2014 08:10:13 +0000 (16:10 +0800)]
ALSA: hda/realtek - Update Initial AMP for EAPD control

The default EAPD control uses verb command to control EAPD. Some codec
does not have verb command for EAPD. It needs to control by hidden
register.

This update will avoid wrong behavior for some codec.  This patch will
fix double setup for EAPD.  It just needs to turn on by one site for
verb command or hidden register controlled.

Detailed changes:
- alc889_coef_init() is replaced with alc_update_coef_idx() with a
  correct COEF value.
- for ALC262, ALC887 and ALC900, the EAPD setup via the hidden
  register is removed because this rather conflicts with the EAPD verb
  setup.
-  For ALC888-VC, also the hidden register access is removed in
  alc888_coef_init().
- Remove the dead #if 0 code for ALC267/ALC268.

Signed-off-by: Kailang Yang <kailang@realtek.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
9 years agoALSA: hda - change three SSID quirks to one pin quirk
David Henningsson [Thu, 30 Oct 2014 07:26:02 +0000 (08:26 +0100)]
ALSA: hda - change three SSID quirks to one pin quirk

These three HP machines all have the same pin config, so we can
change it to a pin quirk.

Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
9 years agoALSA: hda - Set GPIO 4 low for a few HP machines
David Henningsson [Thu, 30 Oct 2014 07:26:01 +0000 (08:26 +0100)]
ALSA: hda - Set GPIO 4 low for a few HP machines

These HP machines needs GPIO 4 low to enable the headphone amplifier.
In addition, we still need to control LEDs via vref and GPIO.

Cc: stable@vger.kernel.org
BugLink: https://bugs.launchpad.net/bugs/1387128
Tested-by: TienFu Chen <tienfu.chen@canonical.com>
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
9 years agoALSA: hda - Add ultra dock support for Thinkpad X240.
Lukas Bossard [Wed, 29 Oct 2014 17:31:07 +0000 (18:31 +0100)]
ALSA: hda - Add ultra dock support for Thinkpad X240.

Adding ultra doch support for Lenovo Thinkpad X240 (17aa:2214).
[Actually replaced the entry with ALC292_FIXUP_TPT440_DOCK -- tiwai]

Signed-off-by: Lukas Bossard <mr.bobukas@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
9 years agoMerge branch 'urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git...
Ingo Molnar [Thu, 30 Oct 2014 06:37:37 +0000 (07:37 +0100)]
Merge branch 'urgent-for-mingo' of git://git./linux/kernel/git/paulmck/linux-rcu into core/urgent

Pull two RCU fixes from Paul E. McKenney:

" - Complete the work of commit dd56af42bd82 (rcu: Eliminate deadlock
    between CPU hotplug and expedited grace periods), which was
    intended to allow synchronize_sched_expedited() to be safely
    used when holding locks acquired by CPU-hotplug notifiers.
    This commit makes the put_online_cpus() avoid the deadlock
    instead of just handling the get_online_cpus().

  - Complete the work of commit 35ce7f29a44a (rcu: Create rcuo
    kthreads only for onlined CPUs), which was intended to allow
    RCU to avoid allocating unneeded kthreads on systems where the
    firmware says that there are more CPUs than are really present.
    This commit makes rcu_barrier() aware of the mismatch, so that
    it doesn't hang waiting for non-existent CPUs. "

Signed-off-by: Ingo Molnar <mingo@kernel.org>
9 years agoMerge tag 'perf-urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git...
Ingo Molnar [Thu, 30 Oct 2014 06:32:34 +0000 (07:32 +0100)]
Merge tag 'perf-urgent-for-mingo' of git://git./linux/kernel/git/acme/linux into perf/urgent

Pull perf/urgent fixes from Arnaldo Carvalho de Melo:

 - Fix report -F (abort, in_tx, mispredict, etc) segfaults for sample.data files
   without branch info (Jiri Olsa)

 - Add patch that should have went in a previous patchkit to use global cache
   provided by libunwind (Namhyung Kim)

 - Make CPUINFO_PROC an array to support different kernels, problem
   detected when the information reported via /proc/cpuinfo changed on ARM (Wang Nan)

 - 'perf probe' --demangle typo fix and a new --quiet option (Masami Hiramatsu)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
9 years agopowerpc/fadump: Fix endianess issues in firmware assisted dump handling
Hari Bathini [Wed, 1 Oct 2014 07:02:30 +0000 (12:32 +0530)]
powerpc/fadump: Fix endianess issues in firmware assisted dump handling

Firmware-assisted dump (fadump) kernel code is not endian safe. The
below patch fixes this issue. Tested this patch with upstream kernel.
Below output shows crash tool successfully opening LE fadump vmcore.

    # crash vmlinux vmcore
    GNU gdb (GDB) 7.6
    This GDB was configured as "powerpc64le-unknown-linux-gnu"...

          KERNEL: vmlinux
        DUMPFILE: vmcore
     CPUS: 16
     DATE: Wed Dec 31 19:00:00 1969
          UPTIME: 00:03:28
    LOAD AVERAGE: 0.46, 0.86, 0.41
           TASKS: 268
        NODENAME: linux-dhr2
         RELEASE: 3.17.0-rc5-7-default
         VERSION: #6 SMP Tue Sep 30 01:06:34 EDT 2014
         MACHINE: ppc64le  (4116 Mhz)
          MEMORY: 40 GB
           PANIC: "Oops: Kernel access of bad area, sig: 11 [#1]" (check log for details)
      PID: 6223
         COMMAND: "bash"
     TASK: c0000009661b2500  [THREAD_INFO: c000000967ac0000]
      CPU: 2
           STATE: TASK_RUNNING (PANIC)

Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com>
[mpe: Make the comment in pSeries_lpar_hptab_clear() clearer]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
9 years agomtd: cfi_cmdset_0001.c: fix resume for LH28F640BF chips
Dmitry Eremin-Solenikov [Wed, 22 Oct 2014 23:23:01 +0000 (01:23 +0200)]
mtd: cfi_cmdset_0001.c: fix resume for LH28F640BF chips

After '#echo mem > /sys/power/state' some devices can not be properly resumed
because apparently the MTD Partition Configuration Register has been reset
to default thus the rootfs cannot be mounted cleanly on resume.
An example of this can be found in the SA-1100 Developer's Manual at 9.5.3.3
where the second step of the Sleep Shutdown Sequence is described:
"An internal reset is applied to the SA-1100. All units are reset...".

As workaround we refresh the PCR value as done initially on chip setup.

This behavior and the fix are confirmed by our tests done on 2 different Zaurus
collie units with kernel 3.17.

Fixes: 812c5fa82bae: ("mtd: cfi_cmdset_0001.c: add support for Sharp LH28F640BF NOR")
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Andrea Adami <andrea.adami@gmail.com>
Cc: <stable@vger.kernel.org> # 3.16+
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
9 years agomtd: omap: fix mtd devices not showing up
Frans Klaver [Mon, 27 Oct 2014 14:34:05 +0000 (15:34 +0100)]
mtd: omap: fix mtd devices not showing up

Since commit 6d178ef2fd5e ("mtd: nand: Move ELM driver and rename as
omap_elm"), I don't have any mtd devices present on my am335x. This
changes the link order of the omap_elm and omap2 objects, causing them
to probe in the wrong order.

To fix this, make elm_config defer probing until the omap_elm driver is
actually loaded.

Signed-off-by: Frans Klaver <frans.klaver@xsens.com>
Acked-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
9 years agopowerpc: Fix section mismatch warning
Fabian Frederick [Wed, 29 Oct 2014 20:14:27 +0000 (21:14 +0100)]
powerpc: Fix section mismatch warning

Add __init to MMU_setup() which uses __initdata boot_command_line.
Also MMU_setup() is only called from MMU_init(), which is also __init.

Warning appeared since commit 3e47d1474c2b.

Fixes: 3e47d1474c2b ("powerpc: Remove powerpc specific cmd_line")
Signed-off-by: Fabian Frederick <fabf@skynet.be>
[mpe: Update changelog]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
9 years agoMerge branch 'akpm' (incoming from Andrew Morton)
Linus Torvalds [Wed, 29 Oct 2014 23:38:48 +0000 (16:38 -0700)]
Merge branch 'akpm' (incoming from Andrew Morton)

Merge misc fixes from Andrew Morton:
 "21 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (21 commits)
  mm/balloon_compaction: fix deflation when compaction is disabled
  sh: fix sh770x SCIF memory regions
  zram: avoid NULL pointer access in concurrent situation
  mm/slab_common: don't check for duplicate cache names
  ocfs2: fix d_splice_alias() return code checking
  mm: rmap: split out page_remove_file_rmap()
  mm: memcontrol: fix missed end-writeback page accounting
  mm: page-writeback: inline account_page_dirtied() into single caller
  lib/bitmap.c: fix undefined shift in __bitmap_shift_{left|right}()
  drivers/rtc/rtc-bq32k.c: fix register value
  memory-hotplug: clear pgdat which is allocated by bootmem in try_offline_node()
  drivers/rtc/rtc-s3c.c: fix initialization failure without rtc source clock
  kernel/kmod: fix use-after-free of the sub_info structure
  drivers/rtc/rtc-pm8xxx.c: rework to support pm8941 rtc
  mm, thp: fix collapsing of hugepages on madvise
  drivers: of: add return value to of_reserved_mem_device_init()
  mm: free compound page with correct order
  gcov: add ARM64 to GCOV_PROFILE_ALL
  fsnotify: next_i is freed during fsnotify_unmount_inodes.
  mm/compaction.c: avoid premature range skip in isolate_migratepages_range
  ...

9 years agoxfs: rework zero range to prevent invalid i_size updates
Brian Foster [Wed, 29 Oct 2014 23:35:11 +0000 (10:35 +1100)]
xfs: rework zero range to prevent invalid i_size updates

The zero range operation is analogous to fallocate with the exception of
converting the range to zeroes. E.g., it attempts to allocate zeroed
blocks over the range specified by the caller. The XFS implementation
kills all delalloc blocks currently over the aligned range, converts the
range to allocated zero blocks (unwritten extents) and handles the
partial pages at the ends of the range by sending writes through the
pagecache.

The current implementation suffers from several problems associated with
inode size. If the aligned range covers an extending I/O, said I/O is
discarded and an inode size update from a previous write never makes it
to disk. Further, if an unaligned zero range extends beyond eof, the
page write induced for the partial end page can itself increase the
inode size, even if the zero range request is not supposed to update
i_size (via KEEP_SIZE, similar to an fallocate beyond EOF).

The latter behavior not only incorrectly increases the inode size, but
can lead to stray delalloc blocks on the inode. Typically, post-eof
preallocation blocks are either truncated on release or inode eviction
or explicitly written to by xfs_zero_eof() on natural file size
extension. If the inode size increases due to zero range, however,
associated blocks leak into the address space having never been
converted or mapped to pagecache pages. A direct I/O to such an
uncovered range cannot convert the extent via writeback and will BUG().
For example:

$ xfs_io -fc "pwrite 0 128k" -c "fzero -k 1m 54321" <file>
...
$ xfs_io -d -c "pread 128k 128k" <file>
<BUG>

If the entire delalloc extent happens to not have page coverage
whatsoever (e.g., delalloc conversion couldn't find a large enough free
space extent), even a full file writeback won't convert what's left of
the extent and we'll assert on inode eviction.

Rework xfs_zero_file_space() to avoid buffered I/O for partial pages.
Use the existing hole punch and prealloc mechanisms as primitives for
zero range. This implementation is not efficient nor ideal as we
writeback dirty data over the range and remove existing extents rather
than convert to unwrittern. The former writeback, however, is currently
the only mechanism available to ensure consistency between pagecache and
extent state. Even a pagecache truncate/delalloc punch prior to hole
punch has lead to inconsistencies due to racing with writeback.

This provides a consistent, correct implementation of zero range that
survives fsstress/fsx testing without assert failures. The
implementation can be optimized from this point forward once the
fundamental issue of pagecache and delalloc extent state consistency is
addressed.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
9 years agomm: Remove false WARN_ON from pagecache_isize_extended()
Jan Kara [Wed, 29 Oct 2014 23:35:00 +0000 (10:35 +1100)]
mm: Remove false WARN_ON from pagecache_isize_extended()

The WARN_ON checking whether i_mutex is held in
pagecache_isize_extended() was wrong because some filesystems (e.g.
XFS) use different locks for serialization of truncates / writes. So
just remove the check.

Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
9 years agoxfs: Check error during inode btree iteration in xfs_bulkstat()
Jan Kara [Wed, 29 Oct 2014 23:34:52 +0000 (10:34 +1100)]
xfs: Check error during inode btree iteration in xfs_bulkstat()

xfs_bulkstat() doesn't check error return from xfs_btree_increment(). In
case of specific fs corruption that could result in xfs_bulkstat()
entering an infinite loop because we would be looping over the same
chunk over and over again. Fix the problem by checking the return value
and terminating the loop properly.

Coverity-id: 1231338
cc: <stable@vger.kernel.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jie Liu <jeff.u.liu@gmail.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
9 years agomm/balloon_compaction: fix deflation when compaction is disabled
Konstantin Khlebnikov [Wed, 29 Oct 2014 21:51:02 +0000 (14:51 -0700)]
mm/balloon_compaction: fix deflation when compaction is disabled

If CONFIG_BALLOON_COMPACTION=n balloon_page_insert() does not link pages
with balloon and doesn't set PagePrivate flag, as a result
balloon_page_dequeue() cannot get any pages because it thinks that all
of them are isolated.  Without balloon compaction nobody can isolate
ballooned pages.  It's safe to remove this check.

Fixes: d6d86c0a7f8d ("mm/balloon_compaction: redesign ballooned pages management").
Signed-off-by: Konstantin Khlebnikov <k.khlebnikov@samsung.com>
Reported-by: Matt Mullins <mmullins@mmlx.us>
Cc: <stable@vger.kernel.org> [3.17]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agosh: fix sh770x SCIF memory regions
Andriy Skulysh [Wed, 29 Oct 2014 21:50:59 +0000 (14:50 -0700)]
sh: fix sh770x SCIF memory regions

Resources scif1_resources & scif2_resources overlap.  Actual SCIF region
size is 0x10.

This is regression from commit d850acf975be ("sh: Declare SCIF register
base and IRQ as resources")

Signed-off-by: Andriy Skulysh <askulysh@gmail.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agozram: avoid NULL pointer access in concurrent situation
Weijie Yang [Wed, 29 Oct 2014 21:50:57 +0000 (14:50 -0700)]
zram: avoid NULL pointer access in concurrent situation

There is a rare NULL pointer bug in mem_used_total_show() and
mem_used_max_store() in concurrent situation, like this:

zram is not initialized, process A is a mem_used_total reader which runs
periodically, while process B try to init zram.

process A  process B
  access meta, get a NULL value
init zram, done
  init_done() is true
  access meta->mem_pool, get a NULL pointer BUG

This patch fixes this issue.

Signed-off-by: Weijie Yang <weijie.yang@samsung.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Acked-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agomm/slab_common: don't check for duplicate cache names
Mikulas Patocka [Wed, 29 Oct 2014 21:50:55 +0000 (14:50 -0700)]
mm/slab_common: don't check for duplicate cache names

The SLUB cache merges caches with the same size and alignment and there
was long standing bug with this behavior:

 - create the cache named "foo"
 - create the cache named "bar" (which is merged with "foo")
 - delete the cache named "foo" (but it stays allocated because "bar"
   uses it)
 - create the cache named "foo" again - it fails because the name "foo"
   is already used

That bug was fixed in commit 694617474e33 ("slab_common: fix the check
for duplicate slab names") by not warning on duplicate cache names when
the SLUB subsystem is used.

Recently, cache merging was implemented the with SLAB subsystem too, in
12220dea07f1 ("mm/slab: support slab merge")).  Therefore we need stop
checking for duplicate names even for the SLAB subsystem.

This patch fixes the bug by removing the check.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agoocfs2: fix d_splice_alias() return code checking
Richard Weinberger [Wed, 29 Oct 2014 21:50:53 +0000 (14:50 -0700)]
ocfs2: fix d_splice_alias() return code checking

d_splice_alias() can return a valid dentry, NULL or an ERR_PTR.
Currently the code checks not for ERR_PTR and will cuase an oops in
ocfs2_dentry_attach_lock().  Fix this by using IS_ERR_OR_NULL().

Signed-off-by: Richard Weinberger <richard@nod.at>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agomm: rmap: split out page_remove_file_rmap()
Johannes Weiner [Wed, 29 Oct 2014 21:50:51 +0000 (14:50 -0700)]
mm: rmap: split out page_remove_file_rmap()

page_remove_rmap() has too many branches on PageAnon() and is hard to
follow.  Move the file part into a separate function.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Cc: Vladimir Davydov <vdavydov@parallels.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agomm: memcontrol: fix missed end-writeback page accounting
Johannes Weiner [Wed, 29 Oct 2014 21:50:48 +0000 (14:50 -0700)]
mm: memcontrol: fix missed end-writeback page accounting

Commit 0a31bc97c80c ("mm: memcontrol: rewrite uncharge API") changed
page migration to uncharge the old page right away.  The page is locked,
unmapped, truncated, and off the LRU, but it could race with writeback
ending, which then doesn't unaccount the page properly:

test_clear_page_writeback()              migration
                                           wait_on_page_writeback()
  TestClearPageWriteback()
                                           mem_cgroup_migrate()
                                             clear PCG_USED
  mem_cgroup_update_page_stat()
    if (PageCgroupUsed(pc))
      decrease memcg pages under writeback

  release pc->mem_cgroup->move_lock

The per-page statistics interface is heavily optimized to avoid a
function call and a lookup_page_cgroup() in the file unmap fast path,
which means it doesn't verify whether a page is still charged before
clearing PageWriteback() and it has to do it in the stat update later.

Rework it so that it looks up the page's memcg once at the beginning of
the transaction and then uses it throughout.  The charge will be
verified before clearing PageWriteback() and migration can't uncharge
the page as long as that is still set.  The RCU lock will protect the
memcg past uncharge.

As far as losing the optimization goes, the following test results are
from a microbenchmark that maps, faults, and unmaps a 4GB sparse file
three times in a nested fashion, so that there are two negative passes
that don't account but still go through the new transaction overhead.
There is no actual difference:

 old:     33.195102545 seconds time elapsed       ( +-  0.01% )
 new:     33.199231369 seconds time elapsed       ( +-  0.03% )

The time spent in page_remove_rmap()'s callees still adds up to the
same, but the time spent in the function itself seems reduced:

     # Children      Self  Command        Shared Object       Symbol
 old:     0.12%     0.11%  filemapstress  [kernel.kallsyms]   [k] page_remove_rmap
 new:     0.12%     0.08%  filemapstress  [kernel.kallsyms]   [k] page_remove_rmap

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: Vladimir Davydov <vdavydov@parallels.com>
Cc: <stable@vger.kernel.org> [3.17.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>