linux-kernel - [PATCH] coresight: perf: Release Coresight path when alloc trace id failed

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Message-Id: <20230425032416.125542-1-tianruidong@linux.alibaba.com>
Date:   Tue, 25 Apr 2023 11:24:16 +0800
From:   Ruidong Tian <tianruidong@...ux.alibaba.com>
To:     tianruidong@...ux.alibaba.com, coresight@...ts.linaro.org
Cc:     suzuki.poulose@....com, mike.leach@...aro.org, leo.yan@...aro.org,
        alexander.shishkin@...ux.intel.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] coresight: perf: Release Coresight path when alloc trace id failed

Error handler for etm_setup_aux can not release coresight path because
cpu mask was cleared when coresight_trace_id_get_cpu_id failed.

Call coresight_release_path function explicitly when alloc trace id filed.

Signed-off-by: Ruidong Tian <tianruidong@...ux.alibaba.com>
---
 drivers/hwtracing/coresight/coresight-etm-perf.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c
index 711f451b6946..89e8ed214ea4 100644
--- a/drivers/hwtracing/coresight/coresight-etm-perf.c
+++ b/drivers/hwtracing/coresight/coresight-etm-perf.c
@@ -402,6 +402,7 @@ static void *etm_setup_aux(struct perf_event *event, void **pages,
 		trace_id = coresight_trace_id_get_cpu_id(cpu);
 		if (!IS_VALID_CS_TRACE_ID(trace_id)) {
 			cpumask_clear_cpu(cpu, mask);
+			coresight_release_path(path);
 			continue;
 		}
 
-- 
2.33.1