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coresight: tmc: Fix mem_lock dead lock

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Mem_lock was not unlocked when multiple sources were enabled and
one of them was disabled first. Free mem_lock in that path.

Change-Id: I380b2ce89c2df2dfd91754d2257503ade69545ce
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
This commit is contained in:
Tingwei Zhang 2019-12-18 19:16:40 -08:00
commit 59430433d6
1 changed files with 1 additions and 0 deletions
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1
drivers/hwtracing/coresight/coresight-tmc-etr.c
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@ -1650,6 +1650,7 @@ static int tmc_disable_etr_sink(struct coresight_device *csdev)
if (atomic_dec_return(csdev->refcnt)) {
spin_unlock_irqrestore(&drvdata->spinlock, flags);
mutex_unlock(&drvdata->mem_lock);
return -EBUSY;
}