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pwm: brcmstb: Fix check of devm_ioremap_resource() return code

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commit c5857e3f94ab2719dfac649a146cb5dd6f21fcf3 upstream.

The change fixes potential oops while accessing iomem on invalid address
if devm_ioremap_resource() fails due to some reason.

The devm_ioremap_resource() function returns ERR_PTR() and never returns
NULL, which makes useless a following check for NULL.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Fixes: 3a9f5957020f ("pwm: Add Broadcom BCM7038 PWM controller support")
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Vladimir Zapolskiy 2016-03-06 03:21:46 +02:00 committed by Greg Kroah-Hartman
parent 385af1d582
commit 194de738b6
1 changed files with 2 additions and 2 deletions
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4
drivers/pwm/pwm-brcmstb.c
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@ -274,8 +274,8 @@ static int brcmstb_pwm_probe(struct platform_device *pdev)
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
p->base = devm_ioremap_resource(&pdev->dev, res);
if (!p->base) {
ret = -ENOMEM;
if (IS_ERR(p->base)) {
ret = PTR_ERR(p->base);
goto out_clk;
}