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linux/drivers/net/wireless/ath
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Mohammed Shafi Shajakhan c2cac2f74a ath10k: fix soft lockup during firmware crash/hw-restart 
During firmware crash (or) user requested manual restart
the system gets into a soft lock up state because of the
below root cause.

During user requested hardware restart / firmware crash
the system goes into a soft lockup state as 'napi_synchronize'
is called after 'napi_disable' (which sets 'NAPI_STATE_SCHED'
bit) and it sleeps into infinite loop as it waits for
'NAPI_STATE_SCHED' to be cleared. This condition is hit because
'ath10k_hif_stop' is called twice as below (resulting in calling
'napi_synchronize' after 'napi_disable')

'ath10k_core_restart' -> 'ath10k_hif_stop' (ATH10K_STATE_ON) ->
-> 'ieee80211_restart_hw' -> 'ath10k_start' -> 'ath10k_halt' ->
'ath10k_core_stop' -> 'ath10k_hif_stop' (ATH10K_STATE_RESTARTING)

Fix this by calling 'ath10k_halt' in ath10k_core_restart itself
as it makes more sense before informing mac80211 to restart h/w
Also remove 'ath10k_halt' in ath10k_start for the state of 'restarting'

Fixes: 3c97f5de1f ("ath10k: implement NAPI support")
Cc: <stable@vger.kernel.org> # v4.9
Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
2016-12-01 13:13:13 +02:00
..
ar5523 net: wireless: ath: ar5523: ar5523: don't print error when allocating urb fails 2016-08-13 14:53:40 -07:00
ath5k ath5k: fix EEPROM dumping via debugfs 2016-09-03 13:02:24 +03:00
ath6kl wireless: fix bogus maybe-uninitialized warning 2016-11-17 08:46:38 +02:00
ath9k ath9k: feed only active spectral / dfs-detector 2016-12-01 12:29:24 +02:00
ath10k ath10k: fix soft lockup during firmware crash/hw-restart 2016-12-01 13:13:13 +02:00
carl9170 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2016-10-05 10:11:24 -07:00
wcn36xx wcn36xx: Silence error about unsupported smd event 188 2016-07-08 17:04:40 +03:00
wil6210 wil6210: support NL80211_ATTR_WIPHY_RETRY_SHORT 2016-11-23 16:50:07 +02:00
ath.h ath9k: add a helper to get the string representation of ath_bus_type 2016-11-15 16:55:37 +02:00
debug.c
dfs_pattern_detector.c ath: constify local structures 2016-09-14 20:01:39 +03:00
dfs_pattern_detector.h
dfs_pri_detector.c
dfs_pri_detector.h ath9k/ath: move dfs pattern detector to ath 2013-10-18 14:03:54 -04:00
hw.c
Kconfig ath: unify Kconfig with other vendors 2015-11-18 14:28:31 +02:00
key.c
main.c ath9k: add a helper to get the string representation of ath_bus_type 2016-11-15 16:55:37 +02:00
Makefile
reg.h
regd.c ath: export alpha2 helper 2016-10-04 18:01:48 +03:00
regd.h ath: export alpha2 helper 2016-10-04 18:01:48 +03:00
regd_common.h
spectral_common.h
trace.c ath: Add support for tracing 2014-10-02 14:23:14 -04:00
trace.h