[PATCH v3 06/13] coresight: perf: Disable trace path upon source error
From: suzuki.poulose@arm.com (Suzuki K Poulose)
Date: 2018-07-26 12:55:11
Also in:
lkml
Subsystem:
arm/coresight framework and drivers, hardware tracing facilities, the rest · Maintainers:
Suzuki K Poulose, Alexander Shishkin, Linus Torvalds
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> --- 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 afe7e7f..6db76ce 100644
--- 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);
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2.7.4