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coresight: etm3x: Release CLAIM tag when operated from perf

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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 <mathieu.poirier@linaro.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mathieu Poirier 2018-11-30 11:43:06 -07:00 committed by Greg Kroah-Hartman
parent 6dd4402f24
commit 34e6c35638
1 changed files with 1 additions and 0 deletions
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1
drivers/hwtracing/coresight/coresight-etm3x.c
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@ -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);
}