linux-kernel - [PATCH -next] ASoC: rt700: fix return value check in rt700_sdw

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Message-ID: <20200115143027.94364-1-weiyongjun1@huawei.com>
Date:   Wed, 15 Jan 2020 14:30:27 +0000
From:   Wei Yongjun <weiyongjun1@...wei.com>
To:     Bard Liao <bardliao@...ltek.com>,
        Oder Chiou <oder_chiou@...ltek.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Shuming Fan <shumingf@...ltek.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: rt700: fix return value check in rt700_sdw_probe()

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

Fixes: 7d2a5f9ae41e ("ASoC: rt700: add rt700 codec driver")
Signed-off-by: Wei Yongjun <weiyongjun1@...wei.com>
---
 sound/soc/codecs/rt700-sdw.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/rt700-sdw.c b/sound/soc/codecs/rt700-sdw.c
index 314103601af3..a4b95425886f 100644
--- a/sound/soc/codecs/rt700-sdw.c
+++ b/sound/soc/codecs/rt700-sdw.c
@@ -460,8 +460,8 @@ static int rt700_sdw_probe(struct sdw_slave *slave,
 
 	regmap = devm_regmap_init(&slave->dev, NULL,
 		&slave->dev, &rt700_regmap);
-	if (!regmap)
-		return -EINVAL;
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
 
 	rt700_init(&slave->dev, sdw_regmap, regmap, slave);