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authorLior David <qca_liord@qca.qualcomm.com>2016-11-23 16:06:41 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-08-06 19:19:41 -0700
commit461b44fdf02f17bc98480a521dd754d016f19f67 (patch)
tree5b579f1633658df7625cd2ac0695c2d951391186 /drivers/net/wireless
parent91cc7296913720b86e4bb8d226ea1469d9fd83e5 (diff)
wil6210: fix deadlock when using fw_no_recovery option
commit dfb5b098e0f40b68aa07f2ec55f4dd762efefbfa upstream. 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> Signed-off-by: Amit Pundir <amit.pundir@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/net/wireless')
-rw-r--r--drivers/net/wireless/ath/wil6210/main.c15
1 files changed, 8 insertions, 7 deletions
diff --git a/drivers/net/wireless/ath/wil6210/main.c b/drivers/net/wireless/ath/wil6210/main.c
index bb69a5949aea..85bca557a339 100644
--- a/drivers/net/wireless/ath/wil6210/main.c
+++ b/drivers/net/wireless/ath/wil6210/main.c
@@ -330,18 +330,19 @@ 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;