hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

wil6210: fix deadlock when using fw_no_recovery option 

When FW crashes with no_fw_recovery option, driver
waits for manual recovery with wil->mutex held, this
can easily create deadlocks.
Fix the problem by moving the wait outside the lock.

Signed-off-by: Lior David <qca_liord@qca.qualcomm.com>
Signed-off-by: Maya Erez <qca_merez@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Lior David 2016-11-23 16:06:41 +02:00 committed by Kalle Valo
parent 2c207eb8e6
commit dfb5b098e0
1 changed files with 8 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/net/wireless/ath/wil6210/main.c
View File

@ -388,18 +388,19 @@ static void wil_fw_error_worker(struct work_struct *work)
wil->last_fw_recovery = jiffies;
wil_info(wil, "fw error recovery requested (try %d)...\n",
wil->recovery_count);
if (!no_fw_recovery)
wil->recovery_state = fw_recovery_running;
if (wil_wait_for_recovery(wil) != 0)
return;
mutex_lock(&wil->mutex);
switch (wdev->iftype) {
case NL80211_IFTYPE_STATION:
case NL80211_IFTYPE_P2P_CLIENT:
case NL80211_IFTYPE_MONITOR:
wil_info(wil, "fw error recovery requested (try %d)...\n",
wil->recovery_count);
if (!no_fw_recovery)
wil->recovery_state = fw_recovery_running;
if (0 != wil_wait_for_recovery(wil))
break;
/* silent recovery, upper layers will see disconnect */
__wil_down(wil);
__wil_up(wil);
break;