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 --- drivers/hwtracing/coresight/coresight-etm3x.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/hwtracing/coresight/coresight-etm3x.c b/drivers/hwtracing/coresight/coresight-etm3x.c index fd5c4cca7db5..000796394662 100644 --- a/drivers/hwtracing/coresight/coresight-etm3x.c +++ b/drivers/hwtracing/coresight/coresight-etm3x.c @@ -603,6 +603,8 @@ static void etm_disable_perf(struct coresight_device *csdev) */ etm_set_pwrdwn(drvdata);
+ coresight_disclaim_device_unlocked(drvdata->base); + CS_LOCK(drvdata->base); }