linux-kernel - [PATCH -next] ASoC: sprd: Fix return value check in sprd_mcdt

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Date:   Mon, 29 Apr 2019 12:25:12 +0000
From:   Wei Yongjun <weiyongjun1@...wei.com>
To:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Orson Zhai <orsonzhai@...il.com>,
        Baolin Wang <baolin.wang@...aro.org>,
        Chunyan Zhang <zhang.lyra@...il.com>
CC:     Wei Yongjun <weiyongjun1@...wei.com>,
        <alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>,
        <kernel-janitors@...r.kernel.org>
Subject: [PATCH -next] ASoC: sprd: Fix return value check in sprd_mcdt_probe()

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

Fixes: d7bff893e04f ("ASoC: sprd: Add Spreadtrum multi-channel data transfer support")
Signed-off-by: Wei Yongjun <weiyongjun1@...wei.com>
---
 sound/soc/sprd/sprd-mcdt.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/sprd/sprd-mcdt.c b/sound/soc/sprd/sprd-mcdt.c
index 28f5e649733d..e9318d7a4810 100644
--- a/sound/soc/sprd/sprd-mcdt.c
+++ b/sound/soc/sprd/sprd-mcdt.c
@@ -951,8 +951,8 @@ static int sprd_mcdt_probe(struct platform_device *pdev)
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	mcdt->base = devm_ioremap_resource(&pdev->dev, res);
-	if (!mcdt->base)
-		return -ENOMEM;
+	if (IS_ERR(mcdt->base))
+		return PTR_ERR(mcdt->base);
 
 	mcdt->dev = &pdev->dev;
 	spin_lock_init(&mcdt->lock);