linux-kernel - [PATCH -next] mfd: hi655x: Fix return value check in hi655x_pmic

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Message-Id: <1466270767-3888-1-git-send-email-weiyj_lk@163.com>
Date:	Sat, 18 Jun 2016 17:26:07 +0000
From:	weiyj_lk@....com
To:	Lee Jones <lee.jones@...aro.org>
Cc:	Wei Yongjun <yongjun_wei@...ndmicro.com.cn>,
	linux-kernel@...r.kernel.org
Subject: [PATCH -next] mfd: hi655x: Fix return value check in hi655x_pmic_probe()

From: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>

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(). Also remove unneeded error handling of
platform_get_resource().

Signed-off-by: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
---
 drivers/mfd/hi655x-pmic.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/mfd/hi655x-pmic.c b/drivers/mfd/hi655x-pmic.c
index 05ddc78..58bf149 100644
--- a/drivers/mfd/hi655x-pmic.c
+++ b/drivers/mfd/hi655x-pmic.c
@@ -80,12 +80,9 @@ static int hi655x_pmic_probe(struct platform_device *pdev)
 	pmic->dev = dev;
 
 	pmic->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!pmic->res)
-		return -ENOENT;
-
 	base = devm_ioremap_resource(dev, pmic->res);
-	if (!base)
-		return -ENOMEM;
+	if (IS_ERR(base))
+		return PTR_ERR(base);
 
 	pmic->regmap = devm_regmap_init_mmio_clk(dev, NULL, base,
 						 &hi655x_regmap_config);