openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity
linux/net/wireless
History
John W. Linville c3d34d5d96 wireless: register wiphy rfkill w/o holding cfg80211_mutex 
Otherwise lockdep complains...

https://bugzilla.kernel.org/show_bug.cgi?id=17311

[ INFO: possible circular locking dependency detected ]
2.6.36-rc2-git4 #12
-------------------------------------------------------
kworker/0:3/3630 is trying to acquire lock:
 (rtnl_mutex){+.+.+.}, at: [<ffffffff813396c7>] rtnl_lock+0x12/0x14

but task is already holding lock:
 (rfkill_global_mutex){+.+.+.}, at: [<ffffffffa014b129>]
rfkill_switch_all+0x24/0x49 [rfkill]

which lock already depends on the new lock.

the existing dependency chain (in reverse order) is:

-> #2 (rfkill_global_mutex){+.+.+.}:
       [<ffffffff81079ad7>] lock_acquire+0x120/0x15b
       [<ffffffff813ae869>] __mutex_lock_common+0x54/0x52e
       [<ffffffff813aede9>] mutex_lock_nested+0x34/0x39
       [<ffffffffa014b4ab>] rfkill_register+0x2b/0x29c [rfkill]
       [<ffffffffa0185ba0>] wiphy_register+0x1ae/0x270 [cfg80211]
       [<ffffffffa0206f01>] ieee80211_register_hw+0x1b4/0x3cf [mac80211]
       [<ffffffffa0292e98>] iwl_ucode_callback+0x9e9/0xae3 [iwlagn]
       [<ffffffff812d3e9d>] request_firmware_work_func+0x54/0x6f
       [<ffffffff81065d15>] kthread+0x8c/0x94
       [<ffffffff8100ac24>] kernel_thread_helper+0x4/0x10

-> #1 (cfg80211_mutex){+.+.+.}:
       [<ffffffff81079ad7>] lock_acquire+0x120/0x15b
       [<ffffffff813ae869>] __mutex_lock_common+0x54/0x52e
       [<ffffffff813aede9>] mutex_lock_nested+0x34/0x39
       [<ffffffffa018605e>] cfg80211_get_dev_from_ifindex+0x1b/0x7c [cfg80211]
       [<ffffffffa0189f36>] cfg80211_wext_giwscan+0x58/0x990 [cfg80211]
       [<ffffffff8139a3ce>] ioctl_standard_iw_point+0x1a8/0x272
       [<ffffffff8139a529>] ioctl_standard_call+0x91/0xa7
       [<ffffffff8139a687>] T.723+0xbd/0x12c
       [<ffffffff8139a727>] wext_handle_ioctl+0x31/0x6d
       [<ffffffff8133014e>] dev_ioctl+0x63d/0x67a
       [<ffffffff8131afd9>] sock_ioctl+0x48/0x21d
       [<ffffffff81102abd>] do_vfs_ioctl+0x4ba/0x509
       [<ffffffff81102b5d>] sys_ioctl+0x51/0x74
       [<ffffffff81009e02>] system_call_fastpath+0x16/0x1b

-> #0 (rtnl_mutex){+.+.+.}:
       [<ffffffff810796b0>] __lock_acquire+0xa93/0xd9a
       [<ffffffff81079ad7>] lock_acquire+0x120/0x15b
       [<ffffffff813ae869>] __mutex_lock_common+0x54/0x52e
       [<ffffffff813aede9>] mutex_lock_nested+0x34/0x39
       [<ffffffff813396c7>] rtnl_lock+0x12/0x14
       [<ffffffffa0185cb5>] cfg80211_rfkill_set_block+0x1a/0x7b [cfg80211]
       [<ffffffffa014aed0>] rfkill_set_block+0x80/0xd5 [rfkill]
       [<ffffffffa014b07e>] __rfkill_switch_all+0x3f/0x6f [rfkill]
       [<ffffffffa014b13d>] rfkill_switch_all+0x38/0x49 [rfkill]
       [<ffffffffa014b821>] rfkill_op_handler+0x105/0x136 [rfkill]
       [<ffffffff81060708>] process_one_work+0x248/0x403
       [<ffffffff81062620>] worker_thread+0x139/0x214
       [<ffffffff81065d15>] kthread+0x8c/0x94
       [<ffffffff8100ac24>] kernel_thread_helper+0x4/0x10

Signed-off-by: John W. Linville <linville@tuxdriver.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
 		2010-08-31 14:48:47 -04:00
..
.gitignore wireless: support internal statically compiled regulatory database 2009-12-21 18:56:10 -05:00
Kconfig wireless: remove CONFIG_WIRELESS_OLD_REGULATORY 2009-12-28 16:31:37 -05:00
Makefile wireless: support internal statically compiled regulatory database 2009-12-21 18:56:10 -05:00
chan.c cfg80211: don't refuse HT20 channels on devices that don't support HT40 2010-06-02 16:13:17 -04:00
core.c wireless: register wiphy rfkill w/o holding cfg80211_mutex 2010-08-31 14:48:47 -04:00
core.h cfg80211: make action channel type optional 2010-06-02 16:13:27 -04:00
db.txt wireless: support internal statically compiled regulatory database 2009-12-21 18:56:10 -05:00
debugfs.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
debugfs.h cfg80211/mac80211: use debugfs_remove_recursive 2009-10-30 16:49:18 -04:00
ethtool.c cfg80211: add firmware and hardware version to wiphy 2009-10-07 16:39:46 -04:00
ethtool.h net/wireless/ethtool.h: drop unnecessary include of linux/ethtool.h 2009-10-07 16:39:49 -04:00
genregdb.awk wireless: correct sparse warning in generated regdb.c 2010-07-20 16:49:37 -04:00
ibss.c cfg80211: fix IBSS default management key 2010-07-26 15:32:41 -04:00
lib80211.c lib80211: consolidate crypt init routines 2008-11-21 11:08:17 -05:00
lib80211_crypt_ccmp.c lib80211: remove unused host_build_iv option 2010-07-26 15:09:04 -04:00
lib80211_crypt_tkip.c lib80211: remove unused host_build_iv option 2010-07-26 15:09:04 -04:00
lib80211_crypt_wep.c lib80211: remove unused host_build_iv option 2010-07-26 15:09:04 -04:00
mlme.c cfg80211: fix locking in action frame TX 2010-08-09 15:18:57 -04:00
nl80211.c nl80211: Fix memory leaks 2010-07-28 16:24:01 -04:00
nl80211.h cfg80211: Add connection quality monitoring support to nl80211 2010-03-24 16:02:37 -04:00
radiotap.c wireless: update radiotap parser 2010-02-08 16:50:53 -05:00
reg.c cfg80211: Update of regulatory request initiator handling 2010-07-28 16:24:01 -04:00
reg.h wireless: move regulatory_init to .init.text 2010-06-18 15:11:13 -04:00
regdb.h wireless: support internal statically compiled regulatory database 2009-12-21 18:56:10 -05:00
scan.c cfg80211: don't get expired BSSes 2010-07-14 13:52:45 -04:00
sme.c wireless: mark cfg80211_is_all_idle as static 2010-07-20 16:49:38 -04:00
sysfs.c cfg80211: export multiple MAC addresses in sysfs 2010-01-22 16:11:16 -05:00
sysfs.h
…
util.c bridge: use rx_handler_data pointer to store net_bridge_port pointer 2010-06-15 11:48:58 -07:00
wext-compat.c wireless extensions: fix kernel heap content leak 2010-08-30 16:35:17 -04:00
wext-compat.h cfg80211: validate channel settings across interfaces 2009-08-14 09:13:42 -04:00
wext-core.c wireless extensions: fix kernel heap content leak 2010-08-30 16:35:17 -04:00
wext-priv.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
wext-proc.c net: spread __net_init, __net_exit 2010-01-17 19:16:02 -08:00
wext-sme.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem 2010-05-11 14:24:55 -04:00
wext-spy.c wext: refactor 2009-10-07 16:39:43 -04:00