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pinctrl: sunxi: Fix potential null pointer dereference

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kzalloc can fail. Add a null check to avoid null pointer
dereference error while accessing the pointer later.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Sachin Kamat 2014-05-30 15:50:52 +05:30 committed by Linus Walleij
parent 7171511eae
commit bd07894e21
1 changed files with 4 additions and 0 deletions
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4
drivers/pinctrl/sunxi/pinctrl-sunxi.c
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@ -211,6 +211,10 @@ static int sunxi_pctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
configlen++;
pinconfig = kzalloc(configlen * sizeof(*pinconfig), GFP_KERNEL);
if (!pinconfig) {
kfree(*map);
return -ENOMEM;
}
if (!of_property_read_u32(node, "allwinner,drive", &val)) {
u16 strength = (val + 1) * 10;