Comment 1 for bug 1457587

issue still exists.
wifi crash

dmesg

[ 8032.285863] ------------[ cut here ]------------
[ 8032.285881] WARNING: CPU: 1 PID: 25804 at /build/buildd/linux-3.19.0/net/mac80211/driver-ops.h:12 ieee80211_do_stop+0x8e7/0x8f0 [mac80211]()
[ 8032.285882] wlan0: Failed check-sdata-in-driver check, flags: 0x4
[ 8032.285884] Modules linked in: cpuid ctr ccm snd_hda_codec_hdmi uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev media snd_h$
[ 8032.285925] CPU: 1 PID: 25804 Comm: kworker/1:2 Tainted: G W 3.19.0-18-generic #18-Ubuntu
[ 8032.285926] Hardware name: TOSHIBA Satellite P300/Satellite P300, BIOS V4.20 01/05/2009
[ 8032.285937] Workqueue: events ieee80211_restart_work [mac80211]
[ 8032.285938] ffffffffc0512768 ffff88012d737b48 ffffffff817c27cd 0000000000000007
[ 8032.285941] ffff88012d737b98 ffff88012d737b88 ffffffff8107593a ffff88013a4093a0
[ 8032.285944] ffff8800bba328c0 ffff8800b8890680 ffff8800b8891530 ffff8800b8891548
[ 8032.285947] Call Trace:
[ 8032.285952] [<ffffffff817c27cd>] dump_stack+0x45/0x57
[ 8032.285955] [<ffffffff8107593a>] warn_slowpath_common+0x8a/0xc0
[ 8032.285957] [<ffffffff810759b6>] warn_slowpath_fmt+0x46/0x50
[ 8032.285971] [<ffffffffc04b1947>] ieee80211_do_stop+0x8e7/0x8f0 [mac80211]
[ 8032.285977] [<ffffffff816e2fb3>] ? dev_deactivate_many+0x213/0x260
[ 8032.285990] [<ffffffffc04b196a>] ieee80211_stop+0x1a/0x20 [mac80211]
[ 8032.285994] [<ffffffff816b9145>] __dev_close_many+0x95/0xf0
[ 8032.285996] [<ffffffff816b9221>] dev_close_many+0x81/0x120
[ 8032.285999] [<ffffffff816bb7e6>] dev_close.part.68+0x36/0x50
[ 8032.286001] [<ffffffff816bb821>] dev_close+0x21/0x30
[ 8032.286015] [<ffffffffc036ca5d>] cfg80211_shutdown_all_interfaces+0x4d/0xc0 [cfg80211]
[ 8032.286031] [<ffffffffc04cc1c5>] ieee80211_reconfig+0x325/0x1620 [mac80211]
[ 8032.286043] [<ffffffffc049b1c2>] ieee80211_restart_work+0x42/0x80 [mac80211]
[ 8032.286045] [<ffffffff8108eb58>] process_one_work+0x158/0x430
[ 8032.286048] [<ffffffff8108f69b>] worker_thread+0x5b/0x530
[ 8032.286051] [<ffffffff8108f640>] ? rescuer_thread+0x3a0/0x3a0
[ 8032.286054] [<ffffffff81094739>] kthread+0xc9/0xe0
[ 8032.286057] [<ffffffff81094670>] ? kthread_create_on_node+0x1c0/0x1c0
[ 8032.286060] [<ffffffff817c9858>] ret_from_fork+0x58/0x90
[ 8032.286063] [<ffffffff81094670>] ? kthread_create_on_node+0x1c0/0x1c0
[ 8032.286065] ---[ end trace 3eac86e3392e1eb7 ]---
[ 8032.287650] cfg80211: Calling CRDA to update world regulatory domain
[ 8032.347519] cfg80211: World regulatory domain updated:
[ 8032.347525] cfg80211: DFS Master region: unset
[ 8032.347527] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[ 8032.347530] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 8032.347533] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 8032.347536] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 8032.347538] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 8032.347541] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 8140.005150] iwl3945 0000:02:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[ 8140.005156] iwl3945 0000:02:00.0: Unable to set up bootstrap uCode: -5
[ 8140.051859] iwl3945 0000:02:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[ 8140.051862] iwl3945 0000:02:00.0: Unable to set up bootstrap uCode: -5
[ 8140.098569] iwl3945 0000:02:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[ 8140.098572] iwl3945 0000:02:00.0: Unable to set up bootstrap uCode: -5
[ 8140.145279] iwl3945 0000:02:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[ 8140.145282] iwl3945 0000:02:00.0: Unable to set up bootstrap uCode: -5
[ 8140.191984] iwl3945 0000:02:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[ 8140.191987] iwl3945 0000:02:00.0: Unable to set up bootstrap uCode: -5
[ 8140.229229] iwl3945 0000:02:00.0: Unable to initialize device after 5 attempts.
[ 8140.279224] iwl3945 0000:02:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[ 8140.279230] iwl3945 0000:02:00.0: Unable to set up bootstrap uCode: -5
[ 8140.325943] iwl3945 0000:02:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[ 8140.325946] iwl3945 0000:02:00.0: Unable to set up bootstrap uCode: -5
[ 8140.372656] iwl3945 0000:02:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[ 8140.372660] iwl3945 0000:02:00.0: Unable to set up bootstrap uCode: -5
[ 8140.419362] iwl3945 0000:02:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[ 8140.419365] iwl3945 0000:02:00.0: Unable to set up bootstrap uCode: -5
[ 8140.466076] iwl3945 0000:02:00.0: BSM uCode verification failed at addr 0x00003800+0 (of 900), is 0xa5a5a5a2, s/b 0xf802020
[ 8140.466078] iwl3945 0000:02:00.0: Unable to set up bootstrap uCode: -5
[ 8140.502835] iwl3945 0000:02:00.0: Unable to initialize device after 5 attempts.

and after, when I try to restart wifi, my laptop freeze ~2 seconds