[4.19,347/422] coresight: perf: Disable trace path upon source error

Message ID 20191119051421.497738470@linuxfoundation.org
State Superseded
Headers show
  • Untitled series #25073
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Commit Message

Greg KH Nov. 19, 2019, 5:19 a.m.
From: Suzuki K Poulose <suzuki.poulose@arm.com>

[ Upstream commit 4f8ef21007531c3d7cb5b826e7b2c8999b65ecae ]

We enable the trace path, before activating the source.
If we fail to enable the source, we must disable the path
to make sure it is available for another session.

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: Sasha Levin <sashal@kernel.org>

 drivers/hwtracing/coresight/coresight-etm-perf.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)



diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c
index 4b53d55788a07..c3c6452015142 100644
--- a/drivers/hwtracing/coresight/coresight-etm-perf.c
+++ b/drivers/hwtracing/coresight/coresight-etm-perf.c
@@ -306,11 +306,13 @@  static void etm_event_start(struct perf_event *event, int flags)
 	/* Finally enable the tracer */
 	if (source_ops(csdev)->enable(csdev, event, CS_MODE_PERF))
-		goto fail_end_stop;
+		goto fail_disable_path;
+	coresight_disable_path(path);
 	perf_aux_output_flag(handle, PERF_AUX_FLAG_TRUNCATED);
 	perf_aux_output_end(handle, 0);