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pinctrl: nuvoton: check for devm_kasprintf() failure 

devm_kasprintf() may return NULL on failure of internal allocation thus
the assignment to  .label  is not safe if not checked. On error
npcm7xx_gpio_of() returns negative values so -ENOMEM in the
(unlikely) failure case of devm_kasprintf() should be fine here.

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Fixes: 3b588e43ee ("pinctrl: nuvoton: add NPCM7xx pinctrl and GPIO driver")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Nicholas Mc Guire 2018-11-23 17:12:58 +01:00 committed by Linus Walleij
parent 45fd26d390
commit 4be1eaf322
1 changed files with 3 additions and 0 deletions
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3
drivers/pinctrl/nuvoton/pinctrl-npcm7xx.c
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@ -1925,6 +1925,9 @@ static int npcm7xx_gpio_of(struct npcm7xx_pinctrl *pctrl)
pctrl->gpio_bank[id].gc.label =
devm_kasprintf(pctrl->dev, GFP_KERNEL, "%pOF",
np);
if (pctrl->gpio_bank[id].gc.label == NULL)
return -ENOMEM;
pctrl->gpio_bank[id].gc.dbg_show = npcmgpio_dbg_show;
pctrl->gpio_bank[id].direction_input =
pctrl->gpio_bank[id].gc.direction_input;