[3/5,v5] ASoC: nuc900: Fix platform_get_irq's error checking
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Message ID 0703b0d6d8ba826a42f244eec6bce71514edd563.1511970158.git.arvind.yadav.cs@gmail.com
State Accepted
Commit fa8cc38165c2f6f73bf947087b3cdc5dd9b9b560
Headers show

Commit Message

Arvind Yadav Nov. 29, 2017, 4:17 p.m. UTC
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 using signed variable ret.
changes in v3 :
              Add failure case '<= 0' instead of '< 0'. IRQ0 is not valid.
changes in v4 :
              Return -EBUSY insted of irq.
changes in v5 :
              Add separate error for irq == 0 and irq < 0.

 sound/soc/nuc900/nuc900-ac97.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Patch
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diff --git a/sound/soc/nuc900/nuc900-ac97.c b/sound/soc/nuc900/nuc900-ac97.c
index b6615af..5e4fbd2 100644
--- a/sound/soc/nuc900/nuc900-ac97.c
+++ b/sound/soc/nuc900/nuc900-ac97.c
@@ -346,8 +346,8 @@  static int nuc900_ac97_drvprobe(struct platform_device *pdev)
 	}
 
 	nuc900_audio->irq_num = platform_get_irq(pdev, 0);
-	if (!nuc900_audio->irq_num) {
-		ret = -EBUSY;
+	if (nuc900_audio->irq_num <= 0) {
+		ret = nuc900_audio->irq_num < 0 ? nuc900_audio->irq_num : -EBUSY;
 		goto out;
 	}