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>

diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c
index afe7e7fc1a930593d7ca1973a85517ea57e4e385..6db76ce6ba5f155f6147b30df0da5b37c82f60cc 100644 (file)
--- a/drivers/hwtracing/coresight/coresight-etm-perf.c
+++ b/drivers/hwtracing/coresight/coresight-etm-perf.c
@@ -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);