While running on wireless-testing + netns pending patches + wow patches:
wpa_supplicant -D wext -i wlan1 -c mosca.conf
[ 233.096916] phy0: device now idle
[ 233.114625] ADDRCONF(NETDEV_UP): wlan1: link is not ready
[ 234.116189] phy0: device no longer idle - scanning
[ 234.233767]
[ 234.233772] =======================================================
[ 234.233797] [ INFO: possible circular locking dependency detected ]
[ 234.233807] 2.6.31-rc3-wl #16
[ 234.233814] -------------------------------------------------------
[ 234.233824] wpa_supplicant/3089 is trying to acquire lock:
[ 234.233835] (cfg80211_mutex){+.+.+.}, at: [<f83eb185>]
cfg80211_get_dev_from_ifindex+0x15/0x80 [cfg80211]
[ 234.233887]
[ 234.233889] but task is already holding lock:
[ 234.233901] (rtnl_mutex){+.+.+.}, at: [<c049de2f>] rtnl_lock+0xf/0x20
[ 234.233932]
[ 234.233934] which lock already depends on the new lock.
[ 234.233936]
[ 234.233957]
[ 234.233958] the existing dependency chain (in reverse order) is:
[ 234.233970]
[ 234.233972] -> #1 (rtnl_mutex){+.+.+.}:
[ 234.233996] [<c0169b35>] __lock_acquire+0xba5/0x1020
[ 234.234014] [<c016a06b>] lock_acquire+0xbb/0xe0
[ 234.234029] [<c05838f4>] mutex_lock_nested+0x54/0x300
[ 234.234045] [<c049de2f>] rtnl_lock+0xf/0x20
[ 234.234061] [<f83f734a>]
nl80211_send_reg_change_event+0x1aa/0x250 [cfg80211]
[ 234.234101] [<f83ed75b>] set_regdom+0x21b/0x4b0 [cfg80211]
[ 234.234133] [<f83f1d84>] nl80211_set_reg+0xe4/0x270 [cfg80211]
[ 234.234165] [<c04b04cf>] genl_rcv_msg+0x1df/0x210
[ 234.234183] [<c04af6c6>] netlink_rcv_skb+0x76/0xa0
[ 234.234199] [<c04b02de>] genl_rcv+0x1e/0x30
[ 234.234215] [<c04af3fb>] netlink_unicast+0x23b/0x250
[ 234.234231] [<c04afedb>] netlink_sendmsg+0x1db/0x2d0
[ 234.234246] [<c048481a>] soc[ 234.234265]
[<c0484951>] sys_sendmsg+0x111/0x230
[ 234.234281] [<c04850fa>] sys_socketcall+0xca/0x2a0
[ 234.234297] [<c010300c>] sysenter_do_call+0x12/0x38
[ 234.234314] [<ffffffff>] 0xffffffff
[ 234.234353]
[ 234.234355] -> #0 (cfg80211_mutex){+.+.+.}:
[ 234.234383] [<c0169be6>] __lock_acquire+0xc56/0x1020
[ 234.234400] [<c016a06b>] lock_acquire+0xbb/0xe0
[ 234.234415] [<c05838f4>] mutex_lock_nested+0x54/0x300
[ 234.234431] [<f83eb185>]
cfg80211_get_dev_from_ifindex+0x15/0x80 [cfg80211]
[ 234.234462] [<f83ef595>] cfg80211_wext_giwscan+0x35/0xc00 [cfg80211]
[ 234.234492] [<c0566fe9>] ioctl_standard_call+0x199/0x3a0
[ 234.234508] [<c0566aef>] wext_handle_ioctl+0x14f/0x230
[ 234.234524] [<c0495524>] dev_ioctl+0x474/0x540
[ 234.234541] [<c0482e75>] sock_ioctl+0xf5/0x270
[ 234.234555] [<c01f11a8>] vfs_ioctl+0x28/0x90
[ 234.234573] [<c01f135a>] do_vfs_ioctl+0x6a/0x5e0
[ 234.234589] [<c01f1933>] sys_ioctl+0x63/0x70
[ 234.234607] [<c010300c>] sysenter_do_call+0x12/0x38
[ 234.234622] [<ffffffff>] 0xffffffff
[ 234.234640]
[ 234.234641] other info that might help us debug this:
k_sendmsg+0xea/0x110
[ 234.234658] 1 lock held by wpa_supplicant/3089:
[ 234.234665] #0: (rtnl_mutex){+.+.+.}, at: [<c049de2f>] rtnl_lock+0xf/0x20
[ 234.234693]
[ 234.234695] stack backtrace:
[ 234.234710] Pid: 3089, comm: wpa_supplicant Not tainted 2.6.31-rc3-wl #16
[ 234.234719] Call Trace:
[ 234.234733] [<c0582215>] ? printk+0x18/0x1b
[ 234.234747] [<c01685b4>] print_circular_bug_tail+0x84/0xd0
[ 234.234761] [<c0169be6>] __lock_acquire+0xc56/0x1020
[ 234.234774] [<c016a06b>] lock_acquire+0xbb/0xe0
[ 234.234802] [<f83eb185>] ? cfg80211_get_dev_from_ifindex+0x15/0x80
[cfg80211]
[ 234.234816] [<c05838f4>] mutex_lock_nested+0x54/0x300
[ 234.234842] [<f83eb185>] ? cfg80211_get_dev_from_ifindex+0x15/0x80
[cfg80211]
[ 234.234857] [<c012bb7b>] ? __wake_up+0x1b/0x50
[ 234.234869] [<c0585535>] ? _spin_unlock_irqrestore+0x35/0x60
[ 234.234896] [<f83eb185>] cfg80211_get_dev_from_ifindex+0x15/0x80 [cfg80211]
[ 234.234924] [<f83ef595>] cfg80211_wext_giwscan+0x35/0xc00 [cfg80211]
[ 234.234939] [<c01689f3>] ? mark_held_locks+0x63/0x80
[ 234.234951] [<c01dc23d>] ? __kmalloc+0x9d/0x1d0
[ 234.234964] [<c0168cbc>] ? trace_hardirqs_on_caller+0x12c/0x170
[ 234.234979] [<c0168d0b>] ? trace_hardirqs_on+0xb/0x10
[ 234.234991] [<c0566fb3>] ? ioctl_standard_call+0x163/0x3a0
[ 234.235004] [<c01689f3>] ? mark_held_locks+0x63/0x80
[ 234.235016] [<c0566fe9>] ioctl_standard_call+0x199/0x3a0
[ 234.235028] [<c049de2f>] ? rtnl_lock+0xf/0x20
[ 234.235043] [<c049499d>] ? __dev_get_by_name+0x7d/0xa0
[ 234.235055] [<c0566aef>] wext_handle_ioctl+0x14f/0x230
[ 234.235083] [<f83ef560>] ? cfg80211_wext_giwscan+0x0/0xc00 [cfg80211]
[ 234.235097] [<c0495524>] dev_ioctl+0x474/0x540
[ 234.235109] [<c0482d80>] ? sock_ioctl+0x0/0x270
[ 234.235121] [<c0482e75>] sock_ioctl+0xf5/0x270
[ 234.235132] [<c0482d80>] ? sock_ioctl+0x0/0x270
[ 234.235144] [<c01f11a8>] vfs_ioctl+0x28/0x90
[ 234.235157] [<c01f135a>] do_vfs_ioctl+0x6a/0x5e0
[ 234.235171] [<c01c3feb>] ? might_fault+0x4b/0xa0
[ 234.235183] [<c01c4037>] ? might_fault+0x97/0xa0
[ 234.235198] [<c01c3feb>] ? might_fault+0x4b/0xa0
[ 234.235210] [<c0103041>] ? sysenter_exit+0xf/0x1a
[ 234.235222] [<c01f1933>] sys_ioctl+0x63/0x70
[ 234.235234] [<c010300c>] sysenter_do_call+0x12/0x38
[ 234.792004] cfg80211: Found new beacon on frequency: 5180 MHz (Ch 36) on phy0
[ 234.906721] cfg80211: Found new beacon on frequency: 5200 MHz (Ch 40) on phy0
[ 235.089212] cfg80211: Found new beacon on frequency: 5220 MHz (Ch 44) on phy0
[ 235.231620] cfg80211: Found new beacon on frequency: 5240 MHz (Ch 48) on phy0
[ 235.231671] cfg80211: Found new beacon on frequency: 5240 MHz (Ch 48) on phy0
[ 235.231696] cfg80211: Found new beacon on frequency: 5240 MHz (Ch 48) on phy0
[ 235.866781] cfg80211: Found new beacon on frequency: 5745 MHz (Ch
149) on phy0
[ 236.416552] phy0: device now idle
[ 244.243725] phy0: device no longer idle - scanning
[ 246.257179] cfg80211: Found new beacon on frequency: 5785 MHz (Ch
157) on phy0
[ 246.533629] phy0: device now idle
[ 251.530506] phy0: device no longer idle - scanning
[ 253.822071] phy0: device now idle
[ 258.816267] phy0: device no longer idle - scanning
[ 261.109986] phy0: device now idle
[ 266.106730] phy0: device no longer idle - scanning
[ 268.409957] phy0: device now idle
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