linux-kernel - [PATCH] perf/arm_pmu_platform: fix tests for platform_get

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Message-Id: <20220825011844.8536-1-yuzhe@nfschina.com>
Date:   Thu, 25 Aug 2022 09:18:44 +0800
From:   Yu Zhe <yuzhe@...china.com>
To:     will@...nel.org, mark.rutland@....com
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        liqiong@...china.com, Yu Zhe <yuzhe@...china.com>
Subject: [PATCH] perf/arm_pmu_platform: fix tests for platform_get_irq() failure

The platform_get_irq() returns negative error codes.  It can't actually
return zero.

Signed-off-by: Yu Zhe <yuzhe@...china.com>
---
 drivers/perf/arm_pmu_platform.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/perf/arm_pmu_platform.c b/drivers/perf/arm_pmu_platform.c
index 513de1f54e2d..933b96e243b8 100644
--- a/drivers/perf/arm_pmu_platform.c
+++ b/drivers/perf/arm_pmu_platform.c
@@ -117,7 +117,7 @@ static int pmu_parse_irqs(struct arm_pmu *pmu)
 
 	if (num_irqs == 1) {
 		int irq = platform_get_irq(pdev, 0);
-		if (irq && irq_is_percpu_devid(irq))
+		if ((irq > 0) && irq_is_percpu_devid(irq))
 			return pmu_parse_percpu_irq(pmu, irq);
 	}
 
-- 
2.11.0