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linux/net/wireless
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Arend Van Spriel 1b57b6210f cfg80211: make cfg80211_sched_scan_results() work from atomic context 
Drivers should be able to call cfg80211_sched_scan_results() from atomic
context. However, with the introduction of multiple scheduled scan feature
this requirement was not taken into account resulting in regression shown
below.

[  119.021594] BUG: scheduling while atomic: irq/47-iwlwifi/517/0x00000200
[  119.021604] Modules linked in: [...]
[  119.021759] CPU: 1 PID: 517 Comm: irq/47-iwlwifi Not tainted 4.12.0-rc2-t440s-20170522+ #1
[  119.021763] Hardware name: LENOVO 20AQS03H00/20AQS03H00, BIOS GJET91WW (2.41 ) 09/21/2016
[  119.021766] Call Trace:
[  119.021778]  ? dump_stack+0x5c/0x84
[  119.021784]  ? __schedule_bug+0x4c/0x70
[  119.021792]  ? __schedule+0x496/0x5c0
[  119.021798]  ? schedule+0x2d/0x80
[  119.021804]  ? schedule_preempt_disabled+0x5/0x10
[  119.021810]  ? __mutex_lock.isra.0+0x18e/0x4c0
[  119.021817]  ? __wake_up+0x2f/0x50
[  119.021833]  ? cfg80211_sched_scan_results+0x19/0x60 [cfg80211]
[  119.021844]  ? cfg80211_sched_scan_results+0x19/0x60 [cfg80211]
[  119.021859]  ? iwl_mvm_rx_lmac_scan_iter_complete_notif+0x17/0x30 [iwlmvm]
[  119.021869]  ? iwl_pcie_rx_handle+0x2a9/0x7e0 [iwlwifi]
[  119.021878]  ? iwl_pcie_irq_handler+0x17c/0x730 [iwlwifi]
[  119.021884]  ? irq_forced_thread_fn+0x60/0x60
[  119.021887]  ? irq_thread_fn+0x16/0x40
[  119.021892]  ? irq_thread+0x109/0x180
[  119.021896]  ? wake_threads_waitq+0x30/0x30
[  119.021901]  ? kthread+0xf2/0x130
[  119.021905]  ? irq_thread_dtor+0x90/0x90
[  119.021910]  ? kthread_create_on_node+0x40/0x40
[  119.021915]  ? ret_from_fork+0x26/0x40

Fixes: b34939b983 ("cfg80211: add request id to cfg80211_sched_scan_*() api")
Reported-by: Sander Eikelenboom <linux@eikelenboom.it>
Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2017-05-23 14:36:46 +02:00
..
.gitignore
ap.c cfg80211: Make pre-CAC results valid only for ETSI domain 2017-03-06 13:54:15 +01:00
chan.c cfg80211: Share Channel DFS state across wiphys of same DFS domain 2017-03-06 13:54:20 +01:00
core.c cfg80211: add request id to cfg80211_sched_scan_*() api 2017-04-28 14:51:43 +02:00
core.h cfg80211: add request id to cfg80211_sched_scan_*() api 2017-04-28 14:51:43 +02:00
db.txt
debugfs.c cfg80211 debugfs: Cleanup some checkpatch issues 2017-02-08 09:15:59 +01:00
debugfs.h
ethtool.c cfg80211: make ethtool the driver's responsibility 2014-06-23 11:05:33 +02:00
genregdb.awk wireless: fixup genregdb.awk for remove of antenna gain from wireless-regd 2014-07-21 12:24:20 +02:00
ibss.c cfg80211: Make pre-CAC results valid only for ETSI domain 2017-03-06 13:54:15 +01:00
Kconfig cfg80211: Fix some linguistics in Kconfig 2016-02-24 09:04:23 +01:00
lib80211_crypt_ccmp.c lib80211: ratelimit key index mismatch 2015-12-04 14:43:32 +01:00
lib80211_crypt_tkip.c wireless: fix bogus maybe-uninitialized warning 2016-11-17 08:46:38 +02:00
lib80211_crypt_wep.c lib80211: Use skcipher and ahash 2016-01-27 20:36:03 +08:00
lib80211.c lib80211: remove unused print_ssid() 2014-10-14 02:18:27 +02:00
Makefile For 4.11, we seem to have more than in the past few releases: 2017-01-14 12:02:15 -05:00
mesh.c cfg80211: Make pre-CAC results valid only for ETSI domain 2017-03-06 13:54:15 +01:00
mlme.c cfg80211: Use a structure to pass connect response params 2017-03-31 08:31:26 +02:00
nl80211.c nl80211: correctly validate MU-MIMO groups 2017-05-08 11:24:34 +02:00
nl80211.h cfg80211: unify cfg80211_roamed() and cfg80211_roamed_bss() 2017-04-28 12:28:44 +02:00
ocb.c cfg80211: ocb: Fix null pointer deref if join_ocb is unimplemented 2015-12-04 14:43:32 +01:00
of.c cfg80211: support ieee80211-freq-limit DT property 2017-01-06 14:01:13 +01:00
radiotap.c cfg80211: add radiotap VHT info to rtap_namespace_sizes 2016-02-24 09:04:41 +01:00
rdev-ops.h cfg80211: add request id parameter to .sched_scan_stop() signature 2017-04-26 23:17:40 +02:00
reg.c cfg80211: Fix dfs state propagation for non-DFS center channel 2017-04-25 21:42:52 +02:00
reg.h cfg80211: Share Channel DFS state across wiphys of same DFS domain 2017-03-06 13:54:20 +01:00
regdb.h
scan.c cfg80211: make cfg80211_sched_scan_results() work from atomic context 2017-05-23 14:36:46 +02:00
sme.c cfg80211: unify cfg80211_roamed() and cfg80211_roamed_bss() 2017-04-28 12:28:44 +02:00
sysfs.c cfg80211: check rdev resume callback only for registered wiphy 2017-03-29 09:11:29 +02:00
sysfs.h net: misc: Remove extern from function prototypes 2013-10-19 19:12:11 -04:00
trace.c
trace.h cfg80211: add request id to cfg80211_sched_scan_*() api 2017-04-28 14:51:43 +02:00
util.c mac80211: strictly check mesh address extension mode 2017-05-17 14:24:29 +02:00
wext-compat.c cfg80211: move add/change interface monitor flags into params 2017-04-13 13:41:38 +02:00
wext-compat.h cfg80211-wext: export symbols only when needed 2015-02-28 21:31:09 +01:00
wext-core.c wext: uninline stream addition functions 2017-01-13 09:38:42 +01:00
wext-priv.c
wext-proc.c net: proc: change proc_net_remove to remove_proc_entry 2013-02-18 14:53:08 -05:00
wext-sme.c cfg80211: wext does not need to set monitor channel in managed mode 2017-01-11 14:10:44 +01:00
wext-spy.c