From: Tingwei Zhang <tingwei@codeaurora.org>
Date: Mon, 28 Sep 2020 10:34:56 -0600
Subject: coresight: etm: perf: Fix warning caused by etm_setup_aux failure
Git-commit: 716f5652a13122364a65e694386b9b26f5e98c51
Patch-mainline: v5.10-rc1
References: jsc#SLE-13629,jsc#SLE-14776
When coresight_build_path() fails on all the cpus, etm_setup_aux
calls etm_free_aux() to free allocated event_data.
WARN_ON(cpumask_empty(mask) will be triggered since cpu mask is empty.
Check event_data->snk_config is not NULL first to avoid this
warning.
Fixes: f5200aa9831f38 ("coresight: perf: Refactor function free_event_data()")
Reviewed-by: Mike Leach <mike.leach@linaro.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200928163513.70169-9-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@suse.com>
---
drivers/hwtracing/coresight/coresight-etm-perf.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c
index 644805e0a9ec..47894a0dcf5e 100644
--- a/drivers/hwtracing/coresight/coresight-etm-perf.c
+++ b/drivers/hwtracing/coresight/coresight-etm-perf.c
@@ -126,10 +126,10 @@ static void free_sink_buffer(struct etm_event_data *event_data)
cpumask_t *mask = &event_data->mask;
struct coresight_device *sink;
- if (WARN_ON(cpumask_empty(mask)))
+ if (!event_data->snk_config)
return;
- if (!event_data->snk_config)
+ if (WARN_ON(cpumask_empty(mask)))
return;
cpu = cpumask_first(mask);
--
2.26.2