From: Mathieu Poirier <mathieu.poirier@linaro.org>
To: linux-arm-kernel@lists.infradead.org
Cc: alexander.shishkin@linux.intel.com, leo.yan@linaro.org,
suzuki.poulose@arm.com, coresight@lists.linaro.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v2 4/4] coresight: etm3x: Release CLAIM tag when operated from perf
Date: Wed, 7 Nov 2018 16:08:52 -0700 [thread overview]
Message-ID: <1541632132-1252-5-git-send-email-mathieu.poirier@linaro.org> (raw)
In-Reply-To: <1541632132-1252-1-git-send-email-mathieu.poirier@linaro.org>
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 | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/hwtracing/coresight/coresight-etm3x.c b/drivers/hwtracing/coresight/coresight-etm3x.c
index 4f638d81a66a..d7f452e62193 100644
--- a/drivers/hwtracing/coresight/coresight-etm3x.c
+++ b/drivers/hwtracing/coresight/coresight-etm3x.c
@@ -602,6 +602,7 @@ 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);
}
--
2.7.4
next prev parent reply other threads:[~2018-11-07 23:09 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-07 23:08 [PATCH v2 0/4] coresight: Fix miscellaneous problems with CLAIM tags Mathieu Poirier
2018-11-07 23:08 ` [PATCH v2 1/4] coresight: etb10: Add support for CLAIM tag Mathieu Poirier
2018-11-07 23:08 ` [PATCH v2 2/4] coresight: etf: Release CLAIM tag after disabling the HW Mathieu Poirier
2018-11-07 23:08 ` [PATCH v2 3/4] coresight: etm3x: Deal with CLAIM tag before and after accessing HW Mathieu Poirier
2018-11-08 17:13 ` Suzuki K Poulose
2018-11-09 17:59 ` Mathieu Poirier
2018-11-09 18:06 ` Suzuki K Poulose
2018-11-07 23:08 ` Mathieu Poirier [this message]
2018-11-08 17:28 ` [PATCH v2 4/4] coresight: etm3x: Release CLAIM tag when operated from perf Suzuki K Poulose
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