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| author | LABBE Corentin <clabbe.montjoie@gmail.com> | 2015-11-11 21:27:34 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2015-11-17 14:39:17 +0100 |
| commit | 56880a243c85668762dfec69b878862f86be6f04 (patch) | |
| tree | 9c051d9ff44218f26a21339f72bfa3f62334f86d /drivers/gpio/gpio-74xx-mmio.c | |
| parent | 8005c49d9aea74d382f474ce11afbbc7d7130bec (diff) | |
| download | linux-56880a243c85668762dfec69b878862f86be6f04.tar.gz linux-56880a243c85668762dfec69b878862f86be6f04.tar.bz2 linux-56880a243c85668762dfec69b878862f86be6f04.zip | |
gpio: 74xx: fix a possible NULL dereference
of_match_device could return NULL, and so cause a NULL pointer
dereference later at line 132:
priv->flags = (uintptr_t) of_id->data;
Reported-by: coverity (CID 1324141)
Signed-off-by: LABBE Corentin <clabbe.montjoie@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/gpio-74xx-mmio.c')
| -rw-r--r-- | drivers/gpio/gpio-74xx-mmio.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/gpio/gpio-74xx-mmio.c b/drivers/gpio/gpio-74xx-mmio.c index 6ed7c0fb3378..6b186829087c 100644 --- a/drivers/gpio/gpio-74xx-mmio.c +++ b/drivers/gpio/gpio-74xx-mmio.c @@ -113,13 +113,16 @@ static int mmio_74xx_dir_out(struct gpio_chip *gc, unsigned int gpio, int val) static int mmio_74xx_gpio_probe(struct platform_device *pdev) { - const struct of_device_id *of_id = - of_match_device(mmio_74xx_gpio_ids, &pdev->dev); + const struct of_device_id *of_id; struct mmio_74xx_gpio_priv *priv; struct resource *res; void __iomem *dat; int err; + of_id = of_match_device(mmio_74xx_gpio_ids, &pdev->dev); + if (!of_id) + return -ENODEV; + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; |