linux-kernel - [PATCH -next] coresight: Fix incorrect handling for return value of devm

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Message-ID: <20250908122022.1315399-1-linyujun809@h-partners.com>
Date: Mon, 8 Sep 2025 20:20:22 +0800
From: Lin Yujun <linyujun809@...artners.com>
To: <suzuki.poulose@....com>, <mike.leach@...aro.org>,
	<james.clark@...aro.org>, <alexander.shishkin@...ux.intel.com>,
	<anshuman.khandual@....com>
CC: <linux-kernel@...r.kernel.org>
Subject: [PATCH -next] coresight: Fix incorrect handling for return value of devm_kzalloc

The return value of devm_kzalloc could be an null pointer,
use "!desc.pdata" to fix incorrect handling return value
of devm_kzalloc.

Fixes: 4277f035d227 ("coresight: trbe: Add a representative coresight_platform_data for TRBE")
Signed-off-by: Lin Yujun <linyujun809@...artners.com>
---
 drivers/hwtracing/coresight/coresight-trbe.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwtracing/coresight/coresight-trbe.c b/drivers/hwtracing/coresight/coresight-trbe.c
index 8267dd1a2130..caf873adfc3a 100644
--- a/drivers/hwtracing/coresight/coresight-trbe.c
+++ b/drivers/hwtracing/coresight/coresight-trbe.c
@@ -1277,11 +1277,11 @@ static void arm_trbe_register_coresight_cpu(struct trbe_drvdata *drvdata, int cp
 	 * ends up failing. Instead let's allocate a dummy zeroed
 	 * coresight_platform_data structure and assign that back
 	 * into the device for that purpose.
 	 */
 	desc.pdata = devm_kzalloc(dev, sizeof(*desc.pdata), GFP_KERNEL);
-	if (IS_ERR(desc.pdata))
+	if (!desc.pdata)
 		goto cpu_clear;
 
 	desc.type = CORESIGHT_DEV_TYPE_SINK;
 	desc.subtype.sink_subtype = CORESIGHT_DEV_SUBTYPE_SINK_PERCPU_SYSMEM;
 	desc.ops = &arm_trbe_cs_ops;
-- 
2.34.1