[PATCH 2/5 v5] ASoC: mt8173: Fix platform_get_irq's error checking

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
Cc: linux-kernel@vger.kernel.org, alsa-devel@alsa-project.org,
	linux-arm-kernel@lists.infradead.org,
	linux-mediatek@lists.infradead.org
Subject: [PATCH 2/5 v5] ASoC: mt8173: Fix platform_get_irq's error checking
Date: Wed, 29 Nov 2017 21:47:11 +0530	[thread overview]
Message-ID: <79e17e6083f5142c4707c94519577b6682a76566.1511970158.git.arvind.yadav.cs@gmail.com> (raw)
In-Reply-To: <4ce907b8389af30eb0677e70cf543a2b795cca12.1511970158.git.arvind.yadav.cs@gmail.com>
In-Reply-To: <4ce907b8389af30eb0677e70cf543a2b795cca12.1511970158.git.arvind.yadav.cs@gmail.com>

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 -ENXIO insted of irq.
changes in v5 :
              Add separate error for irq == 0 and irq < 0.

 sound/soc/mediatek/mt8173/mt8173-afe-pcm.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/sound/soc/mediatek/mt8173/mt8173-afe-pcm.c b/sound/soc/mediatek/mt8173/mt8173-afe-pcm.c
index 8a643a3..c7f7f8a 100644
--- a/sound/soc/mediatek/mt8173/mt8173-afe-pcm.c
+++ b/sound/soc/mediatek/mt8173/mt8173-afe-pcm.c
@@ -1083,7 +1083,7 @@ static int mt8173_afe_init_audio_clk(struct mtk_base_afe *afe)
 static int mt8173_afe_pcm_dev_probe(struct platform_device *pdev)
 {
 	int ret, i;
-	unsigned int irq_id;
+	int irq_id;
 	struct mtk_base_afe *afe;
 	struct mt8173_afe_private *afe_priv;
 	struct resource *res;
@@ -1105,9 +1105,9 @@ static int mt8173_afe_pcm_dev_probe(struct platform_device *pdev)
 	afe->dev = &pdev->dev;
 
 	irq_id = platform_get_irq(pdev, 0);
-	if (!irq_id) {
+	if (irq_id <= 0) {
 		dev_err(afe->dev, "np %s no irq\n", afe->dev->of_node->name);
-		return -ENXIO;
+		return irq_id < 0 ? irq_id : -ENXIO;
 	}
 	ret = devm_request_irq(afe->dev, irq_id, mt8173_afe_irq_handler,
 			       0, "Afe_ISR_Handle", (void *)afe);
-- 
2.7.4
