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From:   Arvind Yadav <arvind.yadav.cs@gmail.com>
To:     lgirdwood@gmail.com, broonie@kernel.org, perex@perex.cz,
        tiwai@suse.com, matthias.bgg@gmail.com,
        linux-arm-kernel@lists.infradead.org,
        linux-mediatek@lists.infradead.org, linux@armlinux.org.uk
Cc:     linux-kernel@vger.kernel.org, alsa-devel@alsa-project.org
Subject: [PATCH 1/5 v4] ASoC: ep93xx-ac97: Fix platform_get_irq's error checking
Date:   Sun, 19 Nov 2017 09:45:00 +0530
Message-Id: <082d4479211d425219f4ab275ecc12e1011eca2f.1511062844.git.arvind.yadav.cs@gmail.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

The platform_get_irq() function returns negative if an error occurs.
zero or positive number on success. platform_get_irq() error checking
for zero is not correct.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
---
changes in v2 :
               irq was unsigned. so changed it to signed.
changes in v3 :
              Add failure case '<= 0' instead of '< 0'. IRQ0 is not valid.
changes in v4 :
              Return -ENODEV insted of irq.

 sound/soc/cirrus/ep93xx-ac97.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/cirrus/ep93xx-ac97.c b/sound/soc/cirrus/ep93xx-ac97.c
index bbf7a92..efeecee 100644
--- a/sound/soc/cirrus/ep93xx-ac97.c
+++ b/sound/soc/cirrus/ep93xx-ac97.c
@@ -365,7 +365,7 @@ static int ep93xx_ac97_probe(struct platform_device *pdev)
 {
 	struct ep93xx_ac97_info *info;
 	struct resource *res;
-	unsigned int irq;
+	int irq;
 	int ret;
 
 	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
@@ -378,7 +378,7 @@ static int ep93xx_ac97_probe(struct platform_device *pdev)
 		return PTR_ERR(info->regs);
 
 	irq = platform_get_irq(pdev, 0);
-	if (!irq)
+	if (irq <= 0)
 		return -ENODEV;
 
 	ret = devm_request_irq(&pdev->dev, irq, ep93xx_ac97_interrupt,
-- 
2.7.4


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