diff options
| author |   Mathieu Poirier <mathieu.poirier@linaro.org> | 2018-11-30 11:43:06 -0700 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-12-06 15:41:55 +0100 |
| commit | 34e6c35638b95f6efa3f065a04950416ce4bec7f (patch) | |
| tree | b83cd61846bb9dac96873894d49d5a8b83d4d37d /drivers/hwtracing/coresight | |
| parent | coresight: etm3x: Deal with CLAIM tag before and after accessing HW (diff) | |
| download | linux-dev-34e6c35638b95f6efa3f065a04950416ce4bec7f.tar.xz linux-dev-34e6c35638b95f6efa3f065a04950416ce4bec7f.zip | |
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 <mathieu.poirier@linaro.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hwtracing/coresight')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-etm3x.c | 1 |
1 files changed, 1 insertions, 0 deletions
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); } |