linux-kernel - [PATCH next] perf: arm-ni: Fix an NULL vs IS

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Message-ID: <04d6ccc3-6d31-4f0f-ab0f-7a88342cc09a@stanley.mountain>
Date: Wed, 11 Sep 2024 10:39:59 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Robin Murphy <robin.murphy@....com>
Cc: Will Deacon <will@...nel.org>, Mark Rutland <mark.rutland@....com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [PATCH next] perf: arm-ni: Fix an NULL vs IS_ERR() bug

The devm_ioremap() function never returns error pointers, it returns a
NULL pointer if there is an error.

Fixes: 4d5a7680f2b4 ("perf: Add driver for Arm NI-700 interconnect PMU")
Signed-off-by: Dan Carpenter <dan.carpenter@...aro.org>
---
 drivers/perf/arm-ni.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/perf/arm-ni.c b/drivers/perf/arm-ni.c
index b72df3aea93e..90fcfe693439 100644
--- a/drivers/perf/arm-ni.c
+++ b/drivers/perf/arm-ni.c
@@ -603,8 +603,8 @@ static int arm_ni_probe(struct platform_device *pdev)
 	 */
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
-	if (IS_ERR(base))
-		return PTR_ERR(base);
+	if (!base)
+		return -ENOMEM;
 
 	arm_ni_probe_domain(base, &cfg);
 	if (cfg.type != NI_GLOBAL)
-- 
2.45.2