firefly-linux-kernel-4.4.55.git
14 years agomac80211: fix possible null-pointer de-reference
Christian Lamparter [Fri, 8 Oct 2010 20:27:07 +0000 (22:27 +0200)]
mac80211: fix possible null-pointer de-reference

This patch not only fixes a null-pointer de-reference
that would be triggered by a PLINK_OPEN frame with mis-
matching/incompatible mesh configuration, but also
responds correctly to non-compatible PLINK_OPEN frames
by generating a PLINK_CLOSE with the right reason code.

The original bug was detected by smatch.
( http://repo.or.cz/w/smatch.git )

net/mac80211/mesh_plink.c +574 mesh_rx_plink_frame(168)
error: we previously assumed 'sta' could be null.

Cc: <stable@kernel.org>
Reviewed-and-Tested-by: Steve deRosier <steve@cozybit.com>
Reviewed-and-Tested-by: Javier Cardona <javier@cozybit.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agoath5k: use the common cycle counter / listen time implementation
Felix Fietkau [Fri, 8 Oct 2010 20:13:54 +0000 (22:13 +0200)]
ath5k: use the common cycle counter / listen time implementation

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Bruno Randolf <br1@einfach.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agoath9k_hw: move the cycle counter tracking to ath
Felix Fietkau [Fri, 8 Oct 2010 20:13:53 +0000 (22:13 +0200)]
ath9k_hw: move the cycle counter tracking to ath

Instead of keeping track of wraparound, clear the counters on every
access and keep separate deltas for ANI and later survey use.
Also moves the function for calculating the 'listen time' for ANI

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Bruno Randolf <br1@einfach.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agoath5k: store the clock rate in common data on channel changes
Felix Fietkau [Fri, 8 Oct 2010 20:13:52 +0000 (22:13 +0200)]
ath5k: store the clock rate in common data on channel changes

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agoath9k_hw: store the clock rate in common data on channel changes
Felix Fietkau [Fri, 8 Oct 2010 20:13:51 +0000 (22:13 +0200)]
ath9k_hw: store the clock rate in common data on channel changes

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agoath5k: Adjust opmode when interfaces are removed.
Ben Greear [Fri, 8 Oct 2010 19:01:15 +0000 (12:01 -0700)]
ath5k: Adjust opmode when interfaces are removed.

Otherwise, if there is an AP and a STATION, and AP
is removed, the NIC will not revert back to STATION mode.

Reported-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agoath5k: Print out opmode in debugfs.
Ben Greear [Fri, 8 Oct 2010 16:43:29 +0000 (09:43 -0700)]
ath5k: Print out opmode in debugfs.

Helps debug multi-VIF scenarios.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agowireless: Set some stats used by /proc/net/wireless (wext)
Ben Greear [Thu, 7 Oct 2010 23:39:20 +0000 (16:39 -0700)]
wireless: Set some stats used by /proc/net/wireless (wext)

Some stats for /proc/net/wireless (and wext in general) are not
being set.  This patch addresses a few of those with values easily
obtained from mac80211 core.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agomac80211: Improve mlme probe response log messages.
Ben Greear [Thu, 7 Oct 2010 23:12:06 +0000 (16:12 -0700)]
mac80211: Improve mlme probe response log messages.

Old messages didn't mention the device in question.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agoRevert "wireless: Use first phyX name available when registering phy devices."
Johannes Berg [Mon, 11 Oct 2010 18:46:52 +0000 (14:46 -0400)]
Revert "wireless: Use first phyX name available when registering phy devices."

This reverts commit 5a254ffe3ffdfa84fe076009bd8e88da412180d2.

The commit failed to take into account that allocated wireless devices
(wiphys) are not added into the device list upon allocation, but only
when they are registered. Therefore, it opened up a race between
allocating and registering a name, so that if two processes allocate and
register concurrently ("alloc, alloc, register, register" rather than
"alloc, register, alloc, register") the code will attempt to use the
same name twice.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
14 years agoMerge branch 'wireless-next' of git://git.kernel.org/pub/scm/linux/kernel/git/luca...
John W. Linville [Mon, 11 Oct 2010 18:43:46 +0000 (14:43 -0400)]
Merge branch 'wireless-next' of git://git./linux/kernel/git/luca/wl12xx

14 years agowl1271: sdio: add suspend/resume support
Ohad Ben-Cohen [Fri, 8 Oct 2010 13:16:27 +0000 (16:16 +0300)]
wl1271: sdio: add suspend/resume support

Add required suspend/resume support to prevent the SDIO
core from removing our card completely during system suspend.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Tested-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>
14 years agowl1271: sdio: enable runtime PM
Ohad Ben-Cohen [Fri, 8 Oct 2010 13:16:16 +0000 (16:16 +0300)]
wl1271: sdio: enable runtime PM

Enable runtime PM for the wl1271 SDIO device.

We request power whenever the WLAN interface is brought up,
and release it after the WLAN interface is taken down.

As a result, power is released immediately after probe returns,
since at that point power has not been explicitly requested yet
(i.e. the WLAN interface is still down).

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Acked-by: Luciano Coelho <luciano.coelho@nokia.com>
Tested-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>
14 years agoiwlagn: add temperature offset calib for 6000g2
Shanyu Zhao [Tue, 21 Sep 2010 23:54:01 +0000 (16:54 -0700)]
iwlagn: add temperature offset calib for 6000g2

6000g2 devices need to have temperature offset calibration. The runtime
uCode needs to receive the calibration results just like BB and LO
calibration. To do this, driver reads the offset value from NVM and send
it to uCode after runtime uCode is alive.

Signed-off-by: Shanyu Zhao <shanyu.zhao@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agoiwlagn: fix default calibration table size
Shanyu Zhao [Tue, 21 Sep 2010 19:06:18 +0000 (12:06 -0700)]
iwlagn: fix default calibration table size

iwlagn driver uses the IWL_MAX_STANDARD_PHY_CALIBRATE_TBL_SIZE
as the chain noise reset calibration index and
IWL_MAX_STANDARD_PHY_CALIBRATE_TBL_SIZE+1 as the chain noise gain
calibration index, if not specified by the TLV value in the new
firmware format.

However, this is broken if we need to add more calibrations like
the temperature offset calibration because we increased
IWL_MAX_STANDARD_PHY_CALIBRATE_TBL_SIZE by 1.

To fix this issue, define IWL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE
and use it as the calibration index instead. We still keep the
IWL_MAX_STANDARD_PHY_CALIBRATE_TBL_SIZE as a sanity check for
the TLV value given by ucode.

Signed-off-by: Shanyu Zhao <shanyu.zhao@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agoiwlagn: no version check for experimental uCode
Wey-Yi Guy [Tue, 21 Sep 2010 23:15:58 +0000 (16:15 -0700)]
iwlagn: no version check for experimental uCode

For experimental uCode, it should work with the driver
if driver has experimental uCode support option enabled;
remove the API version checking.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agoiwlwifi: fix dual-mode scanning
Johannes Berg [Wed, 22 Sep 2010 14:32:13 +0000 (07:32 -0700)]
iwlwifi: fix dual-mode scanning

The recent scanning code shuffle accidentally
moved the SCAN_HW bit setting _after_ the PAN
parameters are modified, which means that they
don't take the scan into account -- fix that.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agoiwlwifi: remove iwl_check_bits
Johannes Berg [Wed, 22 Sep 2010 16:02:12 +0000 (18:02 +0200)]
iwlwifi: remove iwl_check_bits

The function is used exactly once, and the caller
doesn't even need the special check, it can be
simplified to a simple bit check.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agoiwlwifi: clean up declarations
Johannes Berg [Wed, 22 Sep 2010 16:02:11 +0000 (18:02 +0200)]
iwlwifi: clean up declarations

A number of declarations in iwl-core.h should
be in agn specific files, and also rename the
iwl-calib.h file to iwl-agn-calib.h to better
reflect that it belongs to agn.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agoiwlwifi: remove apm_ops.stop
Johannes Berg [Wed, 22 Sep 2010 16:02:10 +0000 (18:02 +0200)]
iwlwifi: remove apm_ops.stop

Since all devices share the same operation here,
there's no need to call it indirectly.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agoiwlwifi: remove set_pwr_src operation
Johannes Berg [Wed, 22 Sep 2010 16:02:09 +0000 (18:02 +0200)]
iwlwifi: remove set_pwr_src operation

The set_pwr_src operation is only ever used from
within the same sub-driver that it is declared
in, so it can just be called directly instead of
being an operation. Also, it is never called to
set the power source to V_aux, so change the two
functions accordingly (but keep the V_aux code
for documentation purposes in a comment).

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agoiwlwifi: remove set_ct_kill operation
Johannes Berg [Wed, 22 Sep 2010 16:02:08 +0000 (18:02 +0200)]
iwlwifi: remove set_ct_kill operation

This operation is only ever called from set_hw_params,
which is also already based on the config/ops, so that
there's no need to have a separate set_ct_kill op and
we can just call the right ct_threshold function.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agoiwlwifi: move iwl_dump_fh to agn
Johannes Berg [Wed, 22 Sep 2010 16:02:07 +0000 (18:02 +0200)]
iwlwifi: move iwl_dump_fh to agn

The iwl_dump_fh function is only used
by the agn module, so it can be there
instead of being exported by the core.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agoiwlwifi: move iwl_dump_csr to agn
Johannes Berg [Wed, 22 Sep 2010 16:02:06 +0000 (18:02 +0200)]
iwlwifi: move iwl_dump_csr to agn

The iwl_dump_csr function is only used
within the agn module, so it can be
moved there instead of being exported
by the core.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agoiwlwifi: move iwl_toggle_rx_ant to agn
Johannes Berg [Wed, 22 Sep 2010 16:02:05 +0000 (18:02 +0200)]
iwlwifi: move iwl_toggle_rx_ant to agn

The iwl_toggle_tx_ant function is only used
by agn code, so it can be moved into the
agn module instead of being exported from
the core.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agoiwlwifi: remove agn rates info there
Johannes Berg [Wed, 22 Sep 2010 16:02:04 +0000 (18:02 +0200)]
iwlwifi: remove agn rates info there

Code and data related to agn bitrates can be
part of the agn module rather than being in
the core module.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agoiwlwifi: remove spurious exports
Johannes Berg [Wed, 22 Sep 2010 16:02:03 +0000 (18:02 +0200)]
iwlwifi: remove spurious exports

A number of exports, especially related to
thermal throttling, are unnecessary because
the code lives in the same module that it
is used in, so remove them.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agoiwlwifi: move tx fail code to agn
Johannes Berg [Wed, 22 Sep 2010 16:02:02 +0000 (18:02 +0200)]
iwlwifi: move tx fail code to agn

The code to print out TX failure reasons is
AGN specific, so it can be in the AGN module.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agoiwlwifi: move agn specific station code there
Johannes Berg [Wed, 22 Sep 2010 16:02:01 +0000 (18:02 +0200)]
iwlwifi: move agn specific station code there

By duplicating a little bit of code between 3945
and agn, we can move a lot of code into an agn
specific station management file and thus reduce
the amount of code in core that is dead to 3945.

before:
   text    data     bss     dec     hex filename
 212886    3872      96  216854   34f16 iwlcore.ko
 620542   10448     304  631294   9a1fe iwlagn.ko
 314013    3264     196  317473   4d821 iwl3945.ko

after:
   text    data     bss     dec     hex filename
 202857    3872      92  206821   327e5 iwlcore.ko
 629102   10448     308  639858   9c372 iwlagn.ko
 314240    3264     196  317700   4d904 iwl3945.ko

delta:
 -10029   iwlcore.ko
   8560   iwlagn.ko
    227   iwl3945.ko

so it's a net win even if you have both loaded,
likely because a lot of EXPORT_SYMBOLs go away.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agoiwlwifi: remove verify_signature eeprom operation
Johannes Berg [Wed, 22 Sep 2010 16:02:00 +0000 (18:02 +0200)]
iwlwifi: remove verify_signature eeprom operation

All drivers share the same implementation, so
there's no need to call this via a function
pointer nor to export it.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agoiwlwifi: rename iwl_mac_beacon_update
Johannes Berg [Wed, 22 Sep 2010 16:01:59 +0000 (18:01 +0200)]
iwlwifi: rename iwl_mac_beacon_update

Rename iwl_mac_beacon_update to iwlcore_beacon_update
and make the calling convention a bit different. The
old name with _mac_ indicated that it was a mac80211
callback, but that's no longer true.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agoiwlwifi: move chain settings to agn
Johannes Berg [Wed, 22 Sep 2010 16:01:58 +0000 (18:01 +0200)]
iwlwifi: move chain settings to agn

The core module doesn't need to carry around
the code for chain settings that is used for
HT drivers (agn) only.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agoiwl3945: use iwl3945_commit_rxon
Johannes Berg [Wed, 22 Sep 2010 16:01:57 +0000 (18:01 +0200)]
iwl3945: use iwl3945_commit_rxon

There's no need to go via the indirect function
call from within the 3945 subdriver.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agoiwlwifi: introduce post_scan hook
Johannes Berg [Wed, 22 Sep 2010 16:01:56 +0000 (18:01 +0200)]
iwlwifi: introduce post_scan hook

The different drivers need to do different things
after a scan, so create a post_scan hook to allow
them to do this.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agoiwlagn: rename iwl_commit_rxon
Johannes Berg [Wed, 22 Sep 2010 16:01:55 +0000 (18:01 +0200)]
iwlagn: rename iwl_commit_rxon

iwl_commit_rxon really should be named
iwlagn_commit_rxon, so rename it.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agoath9k_hw: Fix hw reset failure with HTC driver
Rajkumar Manoharan [Thu, 7 Oct 2010 15:28:39 +0000 (20:58 +0530)]
ath9k_hw: Fix hw reset failure with HTC driver

The following commit removed DISABLE_REGWRITE_BUFFER ops. The unnecessary
REGWRITE_BUFFER_FLUSH was not removed properly which is causing failure on
hw reset.

Author: Felix Fietkau <nbd@openwrt.org>
Date:   Tue Oct 5 12:03:42 2010 +0200

    ath9k_hw: clean up register write buffering

Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agocfg80211: constify WDS address
Johannes Berg [Thu, 7 Oct 2010 11:11:09 +0000 (13:11 +0200)]
cfg80211: constify WDS address

There's no need for the WDS peer address
to not be const, so make it const.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agonl80211: use new genl helpers for WDS
Johannes Berg [Thu, 7 Oct 2010 11:10:30 +0000 (13:10 +0200)]
nl80211: use new genl helpers for WDS

Bill Jordan's patch to allow setting the WDS
peer crossed with my patch removing all the
boilerplate code in nl80211, and consequently
he didn't make use of it yet. Fix that.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agomac80211: fix sw scan locking
Johannes Berg [Thu, 7 Oct 2010 10:55:24 +0000 (12:55 +0200)]
mac80211: fix sw scan locking

The recent scan overhaul broke locking
because now we can jump to code that
attempts to unlock, while we don't have
the mutex held. Fix this by holding the
mutex around all the relevant code.

Reported-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agowl1271: Support FEM autodetection
Juuso Oikarinen [Thu, 7 Oct 2010 07:16:42 +0000 (10:16 +0300)]
wl1271: Support FEM autodetection

In the NVS/INI-parameters for the driver/firmware there is the FEM
(front end module) selection option, which may configure the hardware FEM
via autodetection or manual selection. So far, there has been support for
manual selection only.

Add support for FEM autodetection.

Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agoMerge branch 'wireless-next-2.6' of git://git.kernel.org/pub/scm/linux/kernel/git...
John W. Linville [Thu, 7 Oct 2010 18:40:26 +0000 (14:40 -0400)]
Merge branch 'wireless-next-2.6' of git://git./linux/kernel/git/iwlwifi/iwlwifi-2.6

14 years agoMerge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
John W. Linville [Thu, 7 Oct 2010 18:39:03 +0000 (14:39 -0400)]
Merge branch 'master' of git://git./linux/kernel/git/linville/wireless-2.6

14 years agoRevert "mac80211: use netif_receive_skb in ieee80211_tx_status callpath"
John W. Linville [Thu, 7 Oct 2010 15:35:40 +0000 (11:35 -0400)]
Revert "mac80211: use netif_receive_skb in ieee80211_tx_status callpath"

This reverts commit 5ed3bc7288487bd4f891f420a07319e0b538b4fe.

It turns-out that not all drivers are calling ieee80211_tx_status from a
compatible context.  Revert this for now and try again later...

Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agoRevert "rtl8180: use NAPI for bottom-half processing"
John W. Linville [Thu, 7 Oct 2010 15:31:56 +0000 (11:31 -0400)]
Revert "rtl8180: use NAPI for bottom-half processing"

This reverts commit 030725d2c7c1fafec7ede618647bf30ed79601f0.

This commit relies on commit 5ed3bc7288487bd4f891f420a07319e0b538b4fe
("mac80211: use netif_receive_skb in ieee80211_tx_status callpath")
Unfortunately not all drivers are calling ieee80211_tx_status from a
compatible context, so that commit needs to be reverted in 2.6.36.

Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agoiwlagn: add define for MODULE_FIRMWARE
Wey-Yi Guy [Wed, 6 Oct 2010 23:39:18 +0000 (16:39 -0700)]
iwlagn: add define for MODULE_FIRMWARE

Adding MODULE_FIRMWARE define for 130 series of devices

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agoiwlagn: fix module firmware name for 130 series device
Wey-Yi Guy [Wed, 6 Oct 2010 23:39:17 +0000 (16:39 -0700)]
iwlagn: fix module firmware name for 130 series device

130 series device should use firmware name with 130 in it.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agomac80211: avoid uninitialized var warning in ieee80211_scan_cancel
John W. Linville [Wed, 6 Oct 2010 20:40:40 +0000 (16:40 -0400)]
mac80211: avoid uninitialized var warning in ieee80211_scan_cancel

net/mac80211/scan.c: In function â€˜ieee80211_scan_cancel’:
net/mac80211/scan.c:794: warning: â€˜finish’ may be used uninitialized in this function

Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agocfg80211: fix BSS double-unlinking
Johannes Berg [Wed, 6 Oct 2010 19:18:04 +0000 (21:18 +0200)]
cfg80211: fix BSS double-unlinking

When multiple interfaces are actively trying
to associate with the same BSS, they may both
find that the BSS isn't there and then try to
unlink it. This can cause errors since the
unlinking code can't currently deal with items
that have already been unlinked.

Normally this doesn't happen as most people
don't try to use multiple station interfaces
that associate at the same time too.

Fix this by using the list entry as a flag to
see if the item is still on a list.

Cc: stable@kernel.org
Reported-by: Ben Greear <greearb@candelatech.com>
Tested-by: Hun-Kyi Wynn <hkwynn@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agonl80211/mac80211: Add retry and failed transmission count to station info
Bruno Randolf [Wed, 6 Oct 2010 09:34:12 +0000 (18:34 +0900)]
nl80211/mac80211: Add retry and failed transmission count to station info

This information is already available in mac80211, we just need to export it
via cfg80211 and nl80211.

Signed-off-by: Bruno Randolf <br1@einfach.org>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agoRevert "iwlwifi: do not perferm force reset while doing scan"
Stanislaw Gruszka [Wed, 6 Oct 2010 09:22:13 +0000 (11:22 +0200)]
Revert "iwlwifi: do not perferm force reset while doing scan"

This reverts commit 7acc7c683a747689aaaaad4fce1683fc3f85e552. It was
applied to avoid possible warning in ieee80211_restart_hw, however
reason of the warning were races in mac80211, currently hopefully fixed.

Not reseting device when performing scan is bad for two reasons.

When forcing reset from iwl_check_stuck_queue(), in case of fail,
reset will be repeated until scan finish. But since firmware is in bad
shape, scan only finish after scan_check work (about 7s). So we will
delay the reset, what is not good behaviour.

When forcing reset from iwl_recover_from_statistics(), we will not
repeat the reset, so we will not perform reset at all when needed.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agomac80211: compete scan to cfg80211 if deferred scan fail to start
Stanislaw Gruszka [Wed, 6 Oct 2010 09:22:12 +0000 (11:22 +0200)]
mac80211: compete scan to cfg80211 if deferred scan fail to start

We nulify local->scan_req on failure in __ieee80211_start_scan, so
__ieee80211_scan_completed will not call cfg80211_scan_done. Fix that.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agomac80211: do not requeue scan work when not needed
Stanislaw Gruszka [Wed, 6 Oct 2010 09:22:11 +0000 (11:22 +0200)]
mac80211: do not requeue scan work when not needed

When performing hw scan and not abort it, __ieee80211_scan_completed()
is currently called from scan work, so does not need to reschedule work
to call drv_hw_scan().

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agomac80211: assure we also cancel deferred scan request
Stanislaw Gruszka [Wed, 6 Oct 2010 09:22:10 +0000 (11:22 +0200)]
mac80211: assure we also cancel deferred scan request

This is partial revert and fix for commit
85f72bc839705294b32b6c16b491c0422f0a71b3 "mac80211: only cancel
software-based scans on suspend"

When cfg80211 request the scan and mac80211 perform some management work,
we defer the scan request. We do not canceling such requests when calling
ieee80211_scan_cancel(), because of SCAN_SW_SCANNING bit check just
before the call. So fix that problem.

Another problem, which commit 85f72bc839705294b32b6c16b491c0422f0a71b3
tries to solve, is we can not cancel HW scan. Hence patch make
ieee80211_scan_cancel() ignore HW scan (see code comments). Keeping
local->mtx lock assures that the deferred scan will not become
"working" HW scan.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agomac80211: keep lock when calling __ieee80211_scan_completed()
Stanislaw Gruszka [Wed, 6 Oct 2010 09:22:09 +0000 (11:22 +0200)]
mac80211: keep lock when calling __ieee80211_scan_completed()

We are taking local->mtx inside __ieee80211_scan_completed(), but just
before call to that function we drop the lock. Dropping/taking lock is not
good, because can lead to hard to understand race conditions.

Patch split scan_completed() code into two functions, first must be called
with local->mtx taken and second without it.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agomac80211: reduce number of __ieee80211_scan_completed calls
Stanislaw Gruszka [Wed, 6 Oct 2010 09:22:08 +0000 (11:22 +0200)]
mac80211: reduce number of __ieee80211_scan_completed calls

Use goto instruction to call __ieee80211_scan_completed only ones in
ieee80211_scan_work. This is prepare for the next patch.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agob43: N-PHY: don't duplicate setting channel in shared memory
Rafał Miłecki [Wed, 6 Oct 2010 05:50:08 +0000 (07:50 +0200)]
b43: N-PHY: don't duplicate setting channel in shared memory

It's already set in PHY common code.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agob43: define B43_SHM_SH_CHAN_40MHZ
Rafał Miłecki [Wed, 6 Oct 2010 05:50:07 +0000 (07:50 +0200)]
b43: define B43_SHM_SH_CHAN_40MHZ

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agob43: N-PHY: simplify channel switching
Rafał Miłecki [Wed, 6 Oct 2010 05:50:06 +0000 (07:50 +0200)]
b43: N-PHY: simplify channel switching

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agonl80211: fix error in generic netif_running check
Johannes Berg [Tue, 5 Oct 2010 19:34:11 +0000 (21:34 +0200)]
nl80211: fix error in generic netif_running check

Yikes! The error return keeps a netdev reference
and the rdev mutex locked, fix that!

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agocfg80211/mac80211: allow per-station GTKs
Johannes Berg [Tue, 5 Oct 2010 17:39:30 +0000 (19:39 +0200)]
cfg80211/mac80211: allow per-station GTKs

This adds API to allow adding per-station GTKs,
updates mac80211 to support it, and also allows
drivers to remove a key from hwaccel again when
this may be necessary due to multiple GTKs.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agomac80211: avoid transmitting delBA to old AP
Johannes Berg [Tue, 5 Oct 2010 17:37:40 +0000 (19:37 +0200)]
mac80211: avoid transmitting delBA to old AP

When roaming while we have active BA session,
we can end up transmitting delBA frames to
the old AP while we're already on the new AP's
channel, which can cause warnings.

Simply avoid sending those frames, but still
tear down the internal session state, since
they are not really necessary anyway as we
will implicitly disassociate when sending the
association to the new AP.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agoath9k: Introduce a wrapper for power save disable.
Senthil Balasubramanian [Tue, 5 Oct 2010 15:06:41 +0000 (20:36 +0530)]
ath9k: Introduce a wrapper for power save disable.

Signed-off-by: Senthil Balasubramanian <senthilkumar@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agoath9k: remove unnecessary power save flags.
Senthil Balasubramanian [Tue, 5 Oct 2010 15:06:40 +0000 (20:36 +0530)]
ath9k: remove unnecessary power save flags.

drv_config callback is called only after the ack for the nullframe
is received and so driver need not do anything special for this.

So remove NULLFUNC_COMPLETED, PS_ENABLED flags and bf_isnullfunc
flags from ath9k as mac80211 already handles them properly.

Signed-off-by: Senthil Balasubramanian <senthilkumar@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agoath9k_hw: merge ath9k_hw_ani_monitor_old and ath9k_hw_ani_monitor_new
Felix Fietkau [Mon, 4 Oct 2010 18:09:50 +0000 (20:09 +0200)]
ath9k_hw: merge ath9k_hw_ani_monitor_old and ath9k_hw_ani_monitor_new

After the last rounds of cleanup, these functions are now functionally
equivalent and can thus be merged.
Also get rid of some excessive (and redundant) debug messages.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agoath9k_hw: remove function pointer abstraction for internal ANI ops
Felix Fietkau [Mon, 4 Oct 2010 18:09:49 +0000 (20:09 +0200)]
ath9k_hw: remove function pointer abstraction for internal ANI ops

The code gets more concise and readable when making the new ANI functions
fall back to the old ones if ANI v2 is disabled. This also makes further code
cleanup easier.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agoath9k_hw: remove code duplication in phy error counter handling
Felix Fietkau [Mon, 4 Oct 2010 18:09:48 +0000 (20:09 +0200)]
ath9k_hw: remove code duplication in phy error counter handling

Split out the PHY error counter update from ath9k_hw_ani_monitor_*, reuse
it in ath9k_hw_proc_mib_event (merged from ath9k_hw_proc_mib_event_old
and ath9k_hw_proc_mib_event_new).

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agoath9k_hw: clean up ANI state handling
Felix Fietkau [Mon, 4 Oct 2010 18:09:47 +0000 (20:09 +0200)]
ath9k_hw: clean up ANI state handling

ANI state is kept per channel, so instead of keeping an array of ANI states
with an arbitrary size of 255, move the ANI state into the channel struct.

Move some config settings that are not per-channel out of
the per-channel struct to save some memory.

With those changes, ath9k_ani_restart_old and ath9k_ani_restart_new can
be merged into a single function.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agoath9k_hw: add a helper function to check for the new ANI implementation
Felix Fietkau [Mon, 4 Oct 2010 18:09:46 +0000 (20:09 +0200)]
ath9k_hw: add a helper function to check for the new ANI implementation

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agoath9k_hw: clean up register write buffering
Felix Fietkau [Tue, 5 Oct 2010 10:03:42 +0000 (12:03 +0200)]
ath9k_hw: clean up register write buffering

Throughout the code, DISABLE_REGWRITE_BUFFER is always called right after
REGWRITE_BUFFER_FLUSH. Since that's unlikely to change any time soon, that
makes keeping those ops separate rather pointless, as it only increases
code size and line number counts.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agoath9k_hw: merge codepaths that access the cycle counter registers
Felix Fietkau [Sun, 3 Oct 2010 17:07:17 +0000 (19:07 +0200)]
ath9k_hw: merge codepaths that access the cycle counter registers

The cycle counters are used by ANI to determine the amount of time that the
radio spent not receiving or transmitting. They're also used for debugging
purposes if the baseband watchdog on AR9003 detects a lockup.
In the future, we want to use these counters to determine the medium utilization
and export this information via survey. For that, we need to make sure that
the counter is only accessed from one place, which also ensures that
wraparounds won't occur at inconvenient points in time.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agoath9k_hw: clean up calibration flags
Felix Fietkau [Sun, 3 Oct 2010 17:07:16 +0000 (19:07 +0200)]
ath9k_hw: clean up calibration flags

The calibration actual calibration flags are only used by the per chip family
source files, so it makes more sense to define them in those files instead
of globally. That way the code has to test for less flags.

Also instead of using a separate callback for testing whether a particular
calibration type is supported, simply adjust ah->supp_cals in the calibration
init which is called right after the hardware reset, before any of the
calibrations are run.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agoMerge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
John W. Linville [Wed, 6 Oct 2010 20:25:52 +0000 (16:25 -0400)]
Merge branch 'master' of git://git./linux/kernel/git/linville/wireless-2.6

14 years agomac80211: delete AddBA response timer
Johannes Berg [Tue, 5 Oct 2010 19:40:33 +0000 (21:40 +0200)]
mac80211: delete AddBA response timer

We never delete the addBA response timer, which
is typically fine, but if the station it belongs
to is deleted very quickly after starting the BA
session, before the peer had a chance to reply,
the timer may fire after the station struct has
been freed already. Therefore, we need to delete
the timer in a suitable spot -- best when the
session is being stopped (which will happen even
then) in which case the delete will be a no-op
most of the time.

I've reproduced the scenario and tested the fix.

This fixes the crash reported at
http://mid.gmane.org/4CAB6F96.6090701@candelatech.com

Cc: stable@kernel.org
Reported-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agoath9k_hw: fix regression in ANI listen time calculation
Felix Fietkau [Sun, 3 Oct 2010 17:07:19 +0000 (19:07 +0200)]
ath9k_hw: fix regression in ANI listen time calculation

  wireless-testing
  commit 37e5bf6535a4d697fb9fa6f268a8354a612cbc00
  Author: Luis R. Rodriguez <lrodriguez@atheros.com>
  Date:   Sat Jun 12 00:33:40 2010 -0400

    ath9k_hw: fix clock rate calculations for ANI

This commit accidentally broke clock rate calculation by doubling the
calculated clock rate

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agoiwlagn: define 130 series of WiFi/BT combo devices
Wey-Yi Guy [Wed, 6 Oct 2010 15:14:21 +0000 (08:14 -0700)]
iwlagn: define 130 series of WiFi/BT combo devices

add new structures and defines need to identify 130 devices.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agoiwlagn: rename iwl5000_tx_resp
Wey-Yi Guy [Mon, 20 Sep 2010 16:12:33 +0000 (09:12 -0700)]
iwlagn: rename iwl5000_tx_resp

iwl5000_tx_resp really should be iwlagn_tx_resp, rename it.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agoiwlwifi: remove uncorrect comments
Wey-Yi Guy [Mon, 20 Sep 2010 16:12:32 +0000 (09:12 -0700)]
iwlwifi: remove uncorrect comments

some structure belong to _agn devices, not just 5000. Fix it.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agoiwlagn: rename iwl5000_tx_power_dbm_cmd
Wey-Yi Guy [Mon, 20 Sep 2010 16:12:31 +0000 (09:12 -0700)]
iwlagn: rename iwl5000_tx_power_dbm_cmd

iwl5000_tx_power_dbm_cmd really should be iwlagn_tx_power_dbm_cmd,
so rename it.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agoiwlagn: reduce redundant parameter definitions
Wey-Yi Guy [Wed, 6 Oct 2010 15:10:00 +0000 (08:10 -0700)]
iwlagn: reduce redundant parameter definitions

move paramater definitions to a device paramater structure only
leaving the device name, which antennas are used and what firmware
file to use in the iwl_cfg structure.  this will not completely
remove the redundancies but greatly reduce them for devices that
only vary by name or antennas.  the parameters that are more
likely to change within a given device family are left in iwl_cfg.
also separate bt param structure added to help reduce more.

Signed-off-by: Jay Sternberg <jay.e.sternberg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agoiwlwifi: schedule to deprecate software scan support
Wey-Yi Guy [Wed, 6 Oct 2010 14:42:43 +0000 (07:42 -0700)]
iwlwifi: schedule to deprecate software scan support

Hardware scan is the prefer method for all iwlwifi devices;
especially for dual-mode functions. Schedule to deprecate the
software scan support in kernel 2.6.40

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
14 years agoMerge branch 'wireless-next' of git://git.kernel.org/pub/scm/linux/kernel/git/luca...
John W. Linville [Tue, 5 Oct 2010 17:50:27 +0000 (13:50 -0400)]
Merge branch 'wireless-next' of git://git./linux/kernel/git/luca/wl12xx

14 years agomac80211: fix channel assumption for association done work
Luis R. Rodriguez [Fri, 1 Oct 2010 21:05:19 +0000 (17:05 -0400)]
mac80211: fix channel assumption for association done work

Be consistent and use the wk->chan instead of the
local->hw.conf.channel for the association done work.
This prevents any possible races against channel changes
while we run this work.

In the case that the race did happen we would be initializing
the bit rates for the new AP under the assumption of a wrong
channel and in the worst case, wrong band. This could lead
to trying to assuming we could use CCK frames on 5 GHz, for
example.

This patch has a fix for kernels >= v2.6.34

Cc: stable@kernel.org
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agonl80211: fix remain-on-channel documentation
Johannes Berg [Tue, 5 Oct 2010 14:19:42 +0000 (16:19 +0200)]
nl80211: fix remain-on-channel documentation

The documentation for NL80211_CMD_REMAIN_ON_CHANNEL
isn't accurate, an interface index is required by
the command. Update it accordingly.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agoath9k: get correct tx gain type in ath9k_hw_4k_get_eeprom
Gabor Juhos [Tue, 5 Oct 2010 09:32:17 +0000 (11:32 +0200)]
ath9k: get correct tx gain type in ath9k_hw_4k_get_eeprom

The base_eep_header_4k structure contains information that the
device supports high power tx gain table or not. However the
ath9k_hw_4k_get_eeprom function does not return that value when
it is called with EEP_TXGAIN_TYPE. This leads to that the tx gain
initialization will use the init values from the original tx gain
table even if the device inidicates that the high power table
should be used.

Changes-licensed-under: ISC
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Shu Hwa Shen <shensh@zcomm.com.cn>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agoath5k: Don't wake internal queues
Bruno Randolf [Tue, 5 Oct 2010 04:27:17 +0000 (13:27 +0900)]
ath5k: Don't wake internal queues

We should only wake up queues which mac80211 knows about (queues 0-3). We have
another internal queue ("CAB", queue number 6) which we use for power-saved
frames. When transmitted frames are processed from this queue, we have to make
sure we don't bother mac80211 with waking a queue it doesn't know about.

this fixes:

WARNING: at /home/br1/ath/wireless-testing/net/mac80211/util.c:275
  __ieee80211_wake_queue+0xd6/0xe0 [mac80211]()

Signed-off-by: Bruno Randolf <br1@einfach.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agomac80211: fix deadlock with multiple interfaces
Johannes Berg [Tue, 5 Oct 2010 08:41:47 +0000 (10:41 +0200)]
mac80211: fix deadlock with multiple interfaces

The locking around ieee80211_recalc_smps is
buggy -- it cannot acquire another interface's
mutex while the iflist mutex is held because
another code path could be holding the iface
mutex and trying to acquire the iflist mutex.

But the locking is also unnecessary, we only
check "ifmgd->associated" as a bool, and don't
use the pointer (in check_mgd_smps).

Reported-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agonl80211: reduce dumping boilerplate
Johannes Berg [Mon, 4 Oct 2010 19:14:06 +0000 (21:14 +0200)]
nl80211: reduce dumping boilerplate

Consolidate boilerplate code needed for .dumpit
calls operating on netdevs.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agonl80211: use generic check for netif_running
Johannes Berg [Mon, 4 Oct 2010 19:14:05 +0000 (21:14 +0200)]
nl80211: use generic check for netif_running

Use a new flag that requires the netdev to be
UP and use it to check instead of coding the
check into all functions that require it.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agonl80211: use the new genetlink pre/post_doit hooks
Johannes Berg [Mon, 4 Oct 2010 19:36:35 +0000 (21:36 +0200)]
nl80211: use the new genetlink pre/post_doit hooks

This makes nl80211 use the new genetlink
pre_doit/post_doit hooks for locking and
checking the interface/wiphy index.

This significantly reduces the code size
and the likelihood of locking errors.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agogenetlink: introduce pre_doit/post_doit hooks
Johannes Berg [Mon, 4 Oct 2010 19:14:03 +0000 (21:14 +0200)]
genetlink: introduce pre_doit/post_doit hooks

Each family may have some amount of boilerplate
locking code that applies to most, or even all,
commands.

This allows a family to handle such things in
a more generic way, by allowing it to
 a) include private flags in each operation
 b) specify a pre_doit hook that is called,
    before an operation's doit() callback and
    may return an error directly,
 c) specify a post_doit hook that can undo
    locking or similar things done by pre_doit,
    and finally
 d) include two private pointers in each info
    struct passed between all these operations
    including doit(). (It's two because I'll
    need two in nl80211 -- can be extended.)

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agoipw2200: check for allocation failures
Dan Carpenter [Mon, 4 Oct 2010 12:31:46 +0000 (14:31 +0200)]
ipw2200: check for allocation failures

If kzalloc() fails then return should return with -ENOMEM.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agomac80211: Add WME information element for IBSS
Bruno Randolf [Mon, 4 Oct 2010 02:17:30 +0000 (11:17 +0900)]
mac80211: Add WME information element for IBSS

Enable WME QoS in IBSS mode by adding a WME information element to beacons and
probe respones and by checking for it and marking stations as WME capable if it
is present.

Signed-off-by: Bruno Randolf <br1@einfach.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agort2x00: Work around hw aggregation oddity in rt2800
Helmut Schaa [Sat, 2 Oct 2010 09:34:56 +0000 (11:34 +0200)]
rt2x00: Work around hw aggregation oddity in rt2800

If a frame is not meant to be sent as AMPDU or part of it the hw might
still decide to aggregate this frame if a previous frame started an
AMPDU. However, this will limit the usefulness of the reported tx rate
since the reported rate will be the one specified in the TXWI of the
first frame and thus it is not possible to reliably caculate the
number of retrys by substracting the reported tx rate from the tx rate
in the TXWI.

To fix this issue, only report the successful rate for frames that were
not meant to be aggregated but ended up in an aggregate.

Example:
Frame A (MCS7, AMPDU=1) B (MCS7, AMPDU=1) C (MCS12, AMDPU=0, PROBE_RATE)

Although frame C shoudn't be aggregated the hw might sill put it
into an AMPDU together with A and B. If the transmission succeeds the tx
status will contain MCS7 for all three frames. In that case we should
only report MCS7 as success rate and avoid reporting MCS12-MCS8 as
failed tx attempts as this will affect the future rate control
decisions.

This oddity might strike us in other scenarious as well but the most
common "wrong" report happened for frames used to probe a different tx
rate.

This improves the rate control decisions notable.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agort2x00: Improve cooperation between rt2800pci and minstrel
Helmut Schaa [Sat, 2 Oct 2010 09:34:26 +0000 (11:34 +0200)]
rt2x00: Improve cooperation between rt2800pci and minstrel

In order to lower the impact of probe rates don't send a frame as AMPDU
if the rate control algorithm sets IEEE80211_TX_CTL_RATE_CTRL_PROBE.
Otherwise a whole aggregate would be send with a probe rate which might
lead to numerous retries.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agort2x00: Fix oops caused by error path in rt2x00lib_start
Helmut Schaa [Sat, 2 Oct 2010 09:34:05 +0000 (11:34 +0200)]
rt2x00: Fix oops caused by error path in rt2x00lib_start

When rt2x00lib_enable_radio fails to enable the radio, rt2x00lib_start
will call rt2x00queue_uninitialize to uninitialize the queues. Since,
the queues are not initialized here but already in rt2x00lib_initialize
we shouldn't uninitialize the queues here. Otherwise, a consecutive call
to rt2x00lib_start will oops (see below) because it assumes the queues
are already initialized.

BUG: unable to handle kernel NULL pointer dereference at 00000010
IP: [<f8d2d901>] :rt2800pci:rt2800pci_clear_entry+0x1/0x40
*pde = 00000000
Oops: 0000 [#1] SMP
Modules linked in: ... rt2800pci ...

Pid: 5995, comm: hostapd Not tainted (2.6.27.8 #1)
EIP: 0060:[<f8d2d901>] EFLAGS: 00210246 CPU: 3
EIP is at rt2800pci_clear_entry+0x1/0x40 [rt2800pci]
EAX: 00000000 EBX: f698863c ECX: 00200296 EDX: f8d2dee0
ESI: f6988600 EDI: f5b6f000 EBP: 00000000 ESP: f6d75e4c
 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
Process hostapd (pid: 5995, ti=f6d74000 task=f6ce2300 task.ti=f6d74000)
Stack: f698863c fa00eaec 00000000 f5b6f000 00000000 f7b67000 f5b6e280 fa00c629
      f5b6f000 00000000 fa00ca3d f7b67480 00000001 fa177d4c 01b6e890 f7b67000
      00000000 f7b67000 00000001 00001003 00001002 c066c366 f7b67000 c0668ad0
Call Trace:
 [<fa00eaec>] rt2x00queue_init_queues+0x5c/0x90 [rt2x00lib]
 [<fa00c629>] rt2x00lib_enable_radio+0x29/0xa0 [rt2x00lib]
 [<fa00ca3d>] rt2x00lib_start+0x5d/0xd0 [rt2x00lib]
 [<fa177d4c>] ieee80211_do_open+0x21c/0x510 [mac80211]
 [<c066c366>] dev_open+0x56/0xb0
 [<c0668ad0>] dev_set_rx_mode+0x20/0x40
 [<c066a67f>] dev_change_flags+0x7f/0x190
 [<c06b1495>] devinet_ioctl+0x515/0x690
 [<c0668d24>] __dev_get_by_name+0x74/0x90
 [<c065d3f0>] sock_ioctl+0xd0/0x240
 [<c065d320>] sock_ioctl+0x0/0x240
 [<c018179b>] vfs_ioctl+0x2b/0x90
 [<c0181a5b>] do_vfs_ioctl+0x25b/0x2a0
 [<c0181af6>] sys_ioctl+0x56/0x70
 [<c0103262>] syscall_call+0x7/0xb
 [<c0700000>] add_card+0xad0/0xba0
 =======================
Code: 83 78 08 0e 74 14 8b 02 8b 48 04 85 c9 0f 99 c0 0f b6 c0 c3 8d b6
      00 00 00 00 8b 02 8b 40 04 85 c0 0f 99 c0 0f b6 c0 c3 66 90 53 <8b>
      48 10 8b 58 08 8b 40 04 83 78 08 0e 74 15 8b 11 83 c2 04 8b
EIP: [<f8d2d901>] rt2800pci_clear_entry+0x1/0x40 [rt2800pci] SS:ESP 0068:f6d75e4c
---[ end trace cff9a5c094bb8837 ]---

Reported-by: Joshua Smith <jesmith@kaon.com>
Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agort2x00: Update comment about the AMPDU flag in the TXWI
Helmut Schaa [Sat, 2 Oct 2010 09:33:42 +0000 (11:33 +0200)]
rt2x00: Update comment about the AMPDU flag in the TXWI

During testing with AMPDUs it turned out that the rt2800 hw will aggregate
consecutive frames with the same RA and TID when the first frame in a
possible aggregate has set AMPDU=1 in the TXWI. If a following frame has
set AMPDU=0 in its TXWI it might sill end up in the aggregate of the
previous frame. Update the comment accordingly.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agort2x00: Enable rx aggregation in rt2800
Helmut Schaa [Sat, 2 Oct 2010 09:33:17 +0000 (11:33 +0200)]
rt2x00: Enable rx aggregation in rt2800

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agort2x00: Improve TX status entry validation
Ivo van Doorn [Sat, 2 Oct 2010 09:32:43 +0000 (11:32 +0200)]
rt2x00: Improve TX status entry validation

The TX_STA_FIFO contains some information for identifying
a outgoing frame, however matching by WCID and ACK status is
not sufficient to 100% identify the macthing queue_entry structure
(containing the SKB buffer) which belongs to the status report.

Within TX_STA_FIFO we have a 4-bit field named PACKETID, which is
currently used to encode the queue id. The queue ID is however
limited to values from 0 to 3, which means 2 bits are sufficient
to encode the value. With the remaining 2 bits we can encode a
partial queue_entry index number. The value of PACKETID is not
allowed to become 0, with the queue ID ranging from 0 to 3, at least
one of the bits for the entry identification must be 1.

That leaves us with 3 possible values we can still encode in the
bits. Altough this doesn't allow 100% accurate matching of the
TX_STA_FIFO queue to a queue_entry structure, it at least improves
the accuracy. This allows us to better detect if we have missed the
TX_STA_FIFO report, which in turn reduces the number of watchdog
warnings regarding the TX status timeout.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agort2x00: correctly set max_report_rates in rt61pci and rt2800
Helmut Schaa [Sat, 2 Oct 2010 09:32:16 +0000 (11:32 +0200)]
rt2x00: correctly set max_report_rates in rt61pci and rt2800

rt61pci and rt2800 devices can use up to 7 different rates per tx frame.
However, the device uses a global fallback table. Hence, the rc
algortihm cannot specify multiple rates to try but the device is able to
report multiple rates (based on the retry table). Specify that behavior
by correctly setting max_report_rates and max_rates.

This makes rt2x00 and minstrel play nicer together.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
14 years agomac80211: distinct between max rates and the number of rates the hw can report
Helmut Schaa [Sat, 2 Oct 2010 09:31:55 +0000 (11:31 +0200)]
mac80211: distinct between max rates and the number of rates the hw can report

Some drivers cannot handle multiple retry rates specified by the rc
algorithm but instead use their own retry table (for example rt2800).
However, if such a device registers itself with a max_rates value of 1
the rc algorithm cannot make use of the extended information the device
can provide about retried rates. On the other hand, if a device
registers itself with a max_rates value > 1 the rc algorithm assumes
that the device can handle multi rate retries.

Fix this issue by introducing another hw parameter max_report_rates that
can be set to a different value then max_rates to indicate if a device
is capable of reporting more rates then specified in max_rates.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>