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 3/3] coresight: etm3x: Release CLAIM tag when operated from perf
Date: Mon, 5 Nov 2018 15:26:30 -0700 [thread overview]
Message-ID: <1541456790-28282-4-git-send-email-mathieu.poirier@linaro.org> (raw)
In-Reply-To: <1541456790-28282-1-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 | 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);
}
--
2.7.4
next prev parent reply other threads:[~2018-11-05 22:26 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-05 22:26 [PATCH 0/3] coresight: Fix miscellaneous problems with CLAIM tags Mathieu Poirier
2018-11-05 22:26 ` [PATCH 1/3] coresight: etb10: Add support for CLAIM tag Mathieu Poirier
2018-11-06 9:21 ` Suzuki K Poulose
2018-11-05 22:26 ` [PATCH 2/3] coresight: etf: Release CLAIM tag after disabling the HW Mathieu Poirier
2018-11-06 9:27 ` Suzuki K Poulose
2018-11-05 22:26 ` Mathieu Poirier [this message]
2018-11-07 3:23 ` [PATCH 3/3] coresight: etm3x: Release CLAIM tag when operated from perf leo.yan
2018-11-08 9:49 ` Suzuki K Poulose
2018-11-08 17:10 ` Mathieu Poirier
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