Commit 4f8ef210 authored Sep 20, 2018 by Suzuki K Poulose Committed by Greg Kroah-Hartman Sep 25, 2018

coresight: perf: Disable trace path upon source error



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>

parent f9d81a65

drivers/hwtracing/coresight/coresight-etm-perf.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -317,11 +317,13 @@ 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;

		out:
		return;

		fail_disable_path:
		coresight_disable_path(path);
		fail_end_stop:
		perf_aux_output_flag(handle, PERF_AUX_FLAG_TRUNCATED);
		perf_aux_output_end(handle, 0);

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