linux-kernel - [PATCH AUTOSEL 5.4 08/10] perf/arm_pmu_platform: fix tests for platform_get

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Message-Id: <20220910211901.70760-8-sashal@kernel.org>
Date:   Sat, 10 Sep 2022 17:18:59 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Yu Zhe <yuzhe@...china.com>, Will Deacon <will@...nel.org>,
        Sasha Levin <sashal@...nel.org>, mark.rutland@....com,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH AUTOSEL 5.4 08/10] perf/arm_pmu_platform: fix tests for platform_get_irq() failure

From: Yu Zhe <yuzhe@...china.com>

[ Upstream commit 6bb0d64c100091e131cd16710b62fda3319cd0af ]

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

Signed-off-by: Yu Zhe <yuzhe@...china.com>
Link: https://lore.kernel.org/r/20220825011844.8536-1-yuzhe@nfschina.com
Signed-off-by: Will Deacon <will@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 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 e35cb76c8d104..6eb077db7384d 100644
--- a/drivers/perf/arm_pmu_platform.c
+++ b/drivers/perf/arm_pmu_platform.c
@@ -118,7 +118,7 @@ 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);
 	}
 
-- 
2.35.1