linux-kernel - [PATCH] gpio: iop: fix devm_ioremap

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Date:	Tue, 18 Mar 2014 10:58:33 +0100
From:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To:	Linus Walleij <linus.walleij@...aro.org>,
	Alexandre Courbot <gnurou@...il.com>
Cc:	Lennert Buytenhek <kernel@...tstofly.org>,
	Dan Williams <dan.j.williams@...el.com>,
	Mikael Pettersson <mikpe@...uu.se>,
	Aaro Koskinen <aaro.koskinen@....fi>,
	linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] gpio: iop: fix devm_ioremap_resource() return value checking

devm_ioremap_resource() returns a pointer to the remapped memory or
an ERR_PTR() encoded error code on failure.  Fix the check inside
iop3xx_gpio_probe() accordingly.

Cc: Lennert Buytenhek <kernel@...tstofly.org>
Cc: Dan Williams <dan.j.williams@...el.com>
Cc: Mikael Pettersson <mikpe@...uu.se>
Cc: Aaro Koskinen <aaro.koskinen@....fi>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
---
Compile tested only.

 drivers/gpio/gpio-iop.c |    2 ++
 1 file changed, 2 insertions(+)

Index: b/drivers/gpio/gpio-iop.c
===================================================================
--- a/drivers/gpio/gpio-iop.c	2014-03-14 16:45:08.152724313 +0100
+++ b/drivers/gpio/gpio-iop.c	2014-03-18 10:50:01.903194680 +0100
@@ -111,6 +111,8 @@ static int iop3xx_gpio_probe(struct plat
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
 
 	return gpiochip_add(&iop3xx_chip);
 }

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