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Eliad Peller a7b545f7fe mac80211: add missing locking in ieee80211_reconfig 
When suspending an associated system, and then resuming,
the station vif is being reconfigured without taking the
sdata->u.mgd.mtx lock, which results in the following warning:

WARNING: at net/mac80211/mlme.c:101 ieee80211_ap_probereq_get+0x58/0xb8 [mac80211]()
Modules linked in: wl12xx_sdio wl12xx firmware_class crc7 mac80211 cfg80211 [last unloaded: crc7]
Backtrace:
[<c005432c>] (dump_backtrace+0x0/0x118) from [<c0376e28>] (dump_stack+0x20/0x24)
 r7:00000000 r6:bf12d6ec r5:bf154aac r4:00000065
[<c0376e08>] (dump_stack+0x0/0x24) from [<c0079104>] (warn_slowpath_common+0x5c/0x74)
[<c00790a8>] (warn_slowpath_common+0x0/0x74) from [<c0079148>] (warn_slowpath_null+0x2c/0x34)
 r9:000024ff r8:cd006460 r7:00000001 r6:00000000 r5:00000000
r4:cf1394a0
[<c007911c>] (warn_slowpath_null+0x0/0x34) from [<bf12d6ec>] (ieee80211_ap_probereq_get+0x58/0xb8 [mac80211])
[<bf12d694>] (ieee80211_ap_probereq_get+0x0/0xb8 [mac80211]) from [<bf19cd04>] (wl1271_cmd_build_ap_probe_req+0x30/0xf8 [wl12xx])
 r4:cd007440
[<bf19ccd4>] (wl1271_cmd_build_ap_probe_req+0x0/0xf8 [wl12xx]) from [<bf1995f4>] (wl1271_op_bss_info_changed+0x4c4/0x808 [wl12xx])
 r5:cd007440 r4:000003b4
[<bf199130>] (wl1271_op_bss_info_changed+0x0/0x808 [wl12xx]) from [<bf122168>] (ieee80211_bss_info_change_notify+0x1a4/0x1f8 [mac80211])
[<bf121fc4>] (ieee80211_bss_info_change_notify+0x0/0x1f8 [mac80211]) from [<bf141e80>] (ieee80211_reconfig+0x4d0/0x668 [mac80211])
 r8:cf0eeea4 r7:cd00671c r6:00000000 r5:cd006460 r4:cf1394a0
[<bf1419b0>] (ieee80211_reconfig+0x0/0x668 [mac80211]) from [<bf137dd4>] (ieee80211_resume+0x60/0x70 [mac80211])
[<bf137d74>] (ieee80211_resume+0x0/0x70 [mac80211]) from [<bf0eb930>] (wiphy_resume+0x6c/0x7c [cfg80211])
 r5:cd006248 r4:cd006110
[<bf0eb8c4>] (wiphy_resume+0x0/0x7c [cfg80211]) from [<c0241024>] (legacy_resume+0x38/0x70)
 r7:00000000 r6:00000000 r5:cd006248 r4:cd0062fc
[<c0240fec>] (legacy_resume+0x0/0x70) from [<c0241478>] (device_resume+0x168/0x1a0)
 r8:c04ca8d8 r7:cd00627c r6:00000010 r5:cd006248 r4:cd0062fc
[<c0241310>] (device_resume+0x0/0x1a0) from [<c0241600>] (dpm_resume_end+0xf8/0x3bc)
 r7:00000000 r6:00000005 r5:cd006248 r4:cd0062fc
[<c0241508>] (dpm_resume_end+0x0/0x3bc) from [<c00b2a24>] (suspend_devices_and_enter+0x1b0/0x204)
[<c00b2874>] (suspend_devices_and_enter+0x0/0x204) from [<c00b2b68>] (enter_state+0xf0/0x148)
 r7:c037e978 r6:00000003 r5:c043d807 r4:00000000
[<c00b2a78>] (enter_state+0x0/0x148) from [<c00b20a4>] (state_store+0xa4/0xcc)
 r7:c037e978 r6:00000003 r5:00000003 r4:c043d807
[<c00b2000>] (state_store+0x0/0xcc) from [<c01fc90c>] (kobj_attr_store+0x20/0x24)
[<c01fc8ec>] (kobj_attr_store+0x0/0x24) from [<c0157120>] (sysfs_write_file+0x11c/0x150)
[<c0157004>] (sysfs_write_file+0x0/0x150) from [<c0100f84>] (vfs_write+0xc0/0x14c)
[<c0100ec4>] (vfs_write+0x0/0x14c) from [<c01010e4>] (sys_write+0x4c/0x78)
 r8:40126000 r7:00000004 r6:cf1a7c80 r5:00000000 r4:00000000
[<c0101098>] (sys_write+0x0/0x78) from [<c00500c0>] (ret_fast_syscall+0x0/0x30)
 r8:c00502c8 r7:00000004 r6:403525e8 r5:40126000 r4:00000004

Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-02-09 15:35:13 -05:00
..
aes_ccm.c mac80211: Remove redundant checks for NULL before calls to crypto_free_cipher() 2010-11-15 13:26:11 -05:00
aes_ccm.h
aes_cmac.c mac80211: Remove redundant checks for NULL before calls to crypto_free_cipher() 2010-11-15 13:26:11 -05:00
aes_cmac.h mac80211: 802.11w - Add BIP (AES-128-CMAC) 2009-01-29 16:00:02 -05:00
agg-rx.c mac80211: use maximum number of AMPDU frames as default in BA RX 2011-01-13 15:46:45 -05:00
agg-tx.c mac80211: Add timeout to BA session start API 2010-12-15 17:03:59 -05:00
cfg.c mac80211: fix TX status cookie in HW offload case 2011-02-02 16:38:59 -05:00
cfg.h
chan.c cfg80211/mac80211: use lockdep_assert_held 2010-09-16 15:46:00 -04:00
debugfs.c mac80211: refactor debugfs function generation code 2010-11-15 13:24:48 -05:00
debugfs.h mac80211: refactor debugfs function generation code 2010-11-15 13:24:48 -05:00
debugfs_key.c mac80211: support separate default keys 2010-12-13 15:23:29 -05:00
debugfs_key.h mac80211: support separate default keys 2010-12-13 15:23:29 -05:00
debugfs_netdev.c nl80211/mac80211: define and allow configuring mesh element TTL 2010-12-06 16:01:28 -05:00
debugfs_netdev.h mac80211: reduce reliance on netdev 2009-12-21 18:38:52 -05:00
debugfs_sta.c mac80211: Add timeout to BA session start API 2010-12-15 17:03:59 -05:00
debugfs_sta.h
driver-ops.h mac80211: implement hardware offload for remain-on-channel 2011-01-05 16:07:12 -05:00
driver-trace.c mac80211: fix sparse warnings/errors 2009-08-04 16:43:25 -04:00
driver-trace.h mac80211: implement hardware offload for remain-on-channel 2011-01-05 16:07:12 -05:00
event.c cfg80211: use proper allocation flags 2009-07-10 15:01:49 -04:00
ht.c mac80211: fix SMPS request 2010-10-13 15:45:23 -04:00
ibss.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6 2010-12-15 16:33:28 -05:00
ieee80211_i.h mac80211: fix TX status cookie in HW offload case 2011-02-02 16:38:59 -05:00
iface.c mac80211: implement hardware offload for remain-on-channel 2011-01-05 16:07:12 -05:00
Kconfig Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-12-26 22:37:05 -08:00
key.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6 2011-01-05 14:35:41 -05:00
key.h mac80211: support separate default keys 2010-12-13 15:23:29 -05:00
led.c mac80211: remove stray extern 2011-01-05 16:07:12 -05:00
led.h mac80211: selective throughput LED trigger active 2010-12-22 14:33:37 -05:00
main.c mac80211: fix lockdep warning 2011-01-13 15:46:45 -05:00
Makefile mac80211: add the minstrel_ht rate control algorithm 2010-06-02 16:12:59 -04:00
mesh.c mac80211: Remove unused third address from mesh address extension header. 2010-12-20 14:49:47 -05:00
mesh.h mac80211: Remove unused third address from mesh address extension header. 2010-12-20 14:49:47 -05:00
mesh_hwmp.c nl80211/mac80211: define and allow configuring mesh element TTL 2010-12-06 16:01:28 -05:00
mesh_pathtbl.c nl80211/mac80211: define and allow configuring mesh element TTL 2010-12-06 16:01:28 -05:00
mesh_plink.c mac80211: Let userspace enable and configure vendor specific path selection. 2010-12-20 14:46:57 -05:00
michael.c
michael.h
mlme.c mac80211: fix a compiler warning 2010-12-07 17:08:06 -05:00
offchannel.c mac80211: implement off-channel TX using hw r-o-c offload 2011-01-05 16:07:12 -05:00
pm.c mac80211: assure we also cancel deferred scan request 2010-10-06 16:30:42 -04:00
rate.c cfg80211/mac80211: improve ad-hoc multicast rate handling 2010-11-24 16:19:35 -05:00
rate.h mac80211: add the minstrel_ht rate control algorithm 2010-06-02 16:12:59 -04:00
rc80211_minstrel.c minstrel: don't complain about feedback for unrequested rates 2010-07-26 15:09:04 -04:00
rc80211_minstrel.h minstrel: make the rate control ops reusable from another rc implementation 2010-03-10 17:44:23 -05:00
rc80211_minstrel_debugfs.c llseek: automatically add .llseek fop 2010-10-15 15:53:27 +02:00
rc80211_minstrel_ht.c mac80211: Add timeout to BA session start API 2010-12-15 17:03:59 -05:00
rc80211_minstrel_ht.h minstrel_ht: move minstrel_mcs_groups declaration to header file 2010-06-24 15:42:18 -04:00
rc80211_minstrel_ht_debugfs.c mac80211: disallow seeks in minstrel debug code 2010-09-16 10:33:17 +02:00
rc80211_pid.h mac80211/drivers: rewrite the rate control API 2008-10-31 19:00:23 -04:00
rc80211_pid_algo.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
rc80211_pid_debugfs.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2010-10-23 11:47:02 -07:00
rx.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem 2011-01-05 16:06:25 -05:00
scan.c mac80211: fix sw scan locking 2010-10-07 14:41:27 -04:00
spectmgmt.c mac80211: reduce reliance on netdev 2009-12-21 18:38:52 -05:00
sta_info.c nl80211/mac80211: Report signal average 2010-12-07 16:09:12 -05:00
sta_info.h mac80211: Add timeout to BA session start API 2010-12-15 17:03:59 -05:00
status.c mac80211: fix TX status cookie in HW offload case 2011-02-02 16:38:59 -05:00
tkip.c mac80211: remove wep dependency 2010-07-08 16:35:50 -04:00
tkip.h mac80211: remove wep dependency 2010-07-08 16:35:50 -04:00
tx.c mac80211: fix the skb cloned check in the tx path 2011-02-07 16:02:14 -05:00
util.c mac80211: add missing locking in ieee80211_reconfig 2011-02-09 15:35:13 -05:00
wep.c mac80211: don't kmalloc 16 bytes 2010-10-11 15:04:23 -04:00
wep.h mac80211: remove wep dependency 2010-07-08 16:35:50 -04:00
wme.c mac80211: cleanup select_queue 2010-12-22 15:44:22 -05:00
wme.h mac80211: fix skb buffering issue 2010-01-05 16:21:40 -05:00
work.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6 2010-12-15 16:33:28 -05:00
wpa.c mac80211: move packet flags into packet 2010-09-27 15:57:54 -04:00
wpa.h mac80211: 802.11w - Add BIP (AES-128-CMAC) 2009-01-29 16:00:02 -05:00