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gpio: grgpio: Avoid potential NULL pointer dereference

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irqmap is optional property, so priv->domain can be NULL if !irqmap.
Thus add NULL test for priv->domain before calling irq_domain_remove()
to prevent NULL pointer dereference.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Axel Lin 2014-12-20 22:47:07 +08:00 committed by Linus Walleij
parent 5afb287a06
commit 879828c6ad
1 changed files with 2 additions and 1 deletions
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3
drivers/gpio/gpio-grgpio.c
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@ -441,7 +441,8 @@ static int grgpio_probe(struct platform_device *ofdev)
err = gpiochip_add(gc); err = gpiochip_add(gc);
if (err) { if (err) {
dev_err(&ofdev->dev, "Could not add gpiochip\n"); dev_err(&ofdev->dev, "Could not add gpiochip\n");
irq_domain_remove(priv->domain); if (priv->domain)
irq_domain_remove(priv->domain);
return err; return err;
} }