Commit 59430433 authored Dec 18, 2019 by Tingwei Zhang

coresight: tmc: Fix mem_lock dead lock



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>

parent a70116e1

drivers/hwtracing/coresight/coresight-tmc-etr.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -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;
		}