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qcacmn: Release the platform_info spin lock before del_timer_sync

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In qdf_mc_timer_stop_sync acquires the platform_info spinlock
and call's the del_tymer_sync. del_timer_sync waits for callbacks
to execute all CPU's. But callback scheduler_mc_timer_callback
tries to acquire the platform_info lock to execute. This can
lead to deadlock.

Change-Id: Ib21ee5b57e11d1c98e1308ee5318fb47d78a6ba2
CRs-Fixed: 2453603
This commit is contained in:
Bala Venkatesh 2019-05-16 13:58:49 +05:30 • committed by nshrivas
commit 94b9ce4320
1 changed files with 3 additions and 4 deletions
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7
qdf/linux/src/qdf_mc_timer.c
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@ -745,10 +745,10 @@ QDF_STATUS qdf_mc_timer_stop(qdf_mc_timer_t *timer)
timer->state = QDF_TIMER_STATE_STOPPED;
del_timer(&(timer->platform_info.timer));
qdf_spin_unlock_irqrestore(&timer->platform_info.spinlock);
del_timer(&(timer->platform_info.timer));
qdf_try_allowing_sleep(timer->type);
return QDF_STATUS_SUCCESS;
@ -787,9 +787,8 @@ QDF_STATUS qdf_mc_timer_stop_sync(qdf_mc_timer_t *timer)
timer->state = QDF_TIMER_STATE_STOPPED;
del_timer_sync(&(timer->platform_info.timer));
qdf_spin_unlock_irqrestore(&timer->platform_info.spinlock);
del_timer_sync(&(timer->platform_info.timer));
qdf_try_allowing_sleep(timer->type);