While starting off the etm event, just abort and truncate the perf record if the perf handle as no space left. This avoids configuring both source and sink devices in case the data cannot be consumed in perf.
Cc: Mathieu Poirier mathieu.poirier@linaro.org Cc: Mike Leach mike.leach@linaro.org Cc: Suzuki K Poulose suzuki.poulose@arm.com Signed-off-by: Anshuman Khandual anshuman.khandual@arm.com --- drivers/hwtracing/coresight/coresight-etm-perf.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c index eb9e7e9..e776a07 100644 --- a/drivers/hwtracing/coresight/coresight-etm-perf.c +++ b/drivers/hwtracing/coresight/coresight-etm-perf.c @@ -347,6 +347,9 @@ static void etm_event_start(struct perf_event *event, int flags) if (!event_data) goto fail;
+ if (!handle->size) + goto fail_end_stop; + /* * Check if this ETM is allowed to trace, as decided * at etm_setup_aux(). This could be due to an unreachable