[PATCH -next] sound: n64: Fix return value check in n64audio_probe()

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In case of error, the function devm_platform_ioremap_resource()
returns ERR_PTR() and never returns NULL. The NULL test in the
return value check should be replaced with IS_ERR().

Fixes: 1448f8acf4cc ("sound: Add n64 driver")
Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: Wei Yongjun <weiyongjun1@xxxxxxxxxx>
---
 sound/mips/snd-n64.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/sound/mips/snd-n64.c b/sound/mips/snd-n64.c
index ca6b4b99da98..e35e93157755 100644
--- a/sound/mips/snd-n64.c
+++ b/sound/mips/snd-n64.c
@@ -312,14 +312,14 @@ static int __init n64audio_probe(struct platform_device *pdev)
 	}
 
 	priv->mi_reg_base = devm_platform_ioremap_resource(pdev, 0);
-	if (!priv->mi_reg_base) {
-		err = -EINVAL;
+	if (IS_ERR(priv->mi_reg_base)) {
+		err = PTR_ERR(priv->mi_reg_base);
 		goto fail_dma_alloc;
 	}
 
 	priv->ai_reg_base = devm_platform_ioremap_resource(pdev, 1);
-	if (!priv->ai_reg_base) {
-		err = -EINVAL;
+	if (IS_ERR(priv->ai_reg_base)) {
+		err = PTR_ERR(priv->ai_reg_base);
 		goto fail_dma_alloc;
 	}
 




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