linux-kernel - [PATCH] misc: atmel-ssc: fix error check return value of platform_get

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Message-Id: <20220413093222.2538066-1-lv.ruyi@zte.com.cn>
Date:   Wed, 13 Apr 2022 09:32:22 +0000
From:   cgel.zte@...il.com
To:     codrin.ciubotariu@...rochip.com
Cc:     arnd@...db.de, nicolas.ferre@...rochip.com,
        alexandre.belloni@...tlin.com, claudiu.beznea@...rochip.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Lv Ruyi <lv.ruyi@....com.cn>, Zeal Robot <zealci@....com.cn>
Subject: [PATCH] misc: atmel-ssc: fix error check return value of platform_get_irq()

From: Lv Ruyi <lv.ruyi@....com.cn>

platform_get_irq() return negative value on failure, so null check of
ssc->irq is incorrect. Fix it by comparing whether it is less than zero.

Reported-by: Zeal Robot <zealci@....com.cn>
Signed-off-by: Lv Ruyi <lv.ruyi@....com.cn>
---
 drivers/misc/atmel-ssc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/misc/atmel-ssc.c b/drivers/misc/atmel-ssc.c
index d6cd5537126c..5e7b290d9515 100644
--- a/drivers/misc/atmel-ssc.c
+++ b/drivers/misc/atmel-ssc.c
@@ -232,7 +232,7 @@ static int ssc_probe(struct platform_device *pdev)
 	clk_disable_unprepare(ssc->clk);
 
 	ssc->irq = platform_get_irq(pdev, 0);
-	if (!ssc->irq) {
+	if (ssc->irq < 0) {
 		dev_dbg(&pdev->dev, "could not get irq\n");
 		return -ENXIO;
 	}
-- 
2.25.1