From 34e6c35638b95f6efa3f065a04950416ce4bec7f Mon Sep 17 00:00:00 2001 From: Mathieu Poirier Date: Fri, 30 Nov 2018 11:43:06 -0700 Subject: [PATCH] coresight: etm3x: Release CLAIM tag when operated from perf This patch deals with the release of the CLAIM tag when the ETM is operated from perf. Otherwise the tag is left asserted and subsequent requests to use the device fail. Signed-off-by: Mathieu Poirier Reviewed-by: Suzuki K Poulose Signed-off-by: Greg Kroah-Hartman --- drivers/hwtracing/coresight/coresight-etm3x.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/hwtracing/coresight/coresight-etm3x.c b/drivers/hwtracing/coresight/coresight-etm3x.c index 6f30d52da9e4..9a63e87ea5f3 100644 --- a/drivers/hwtracing/coresight/coresight-etm3x.c +++ b/drivers/hwtracing/coresight/coresight-etm3x.c @@ -601,6 +601,7 @@ static void etm_disable_perf(struct coresight_device *csdev) * power down the tracer. */ etm_set_pwrdwn(drvdata); + coresight_disclaim_device_unlocked(drvdata->base); CS_LOCK(drvdata->base); }