diff options
| author | Bartosz Golaszewski | 2017-05-25 10:37:37 +0200 |
|---|---|---|
| committer | Linus Walleij | 2017-05-29 13:33:42 +0200 |
| commit | d76e8babe420edbf9f9f9c78e42ef01f0e62dc07 (patch) | |
| tree | 23d83d6663f192c2e2189b6a2f94cb3ca0c1b7c2 | |
| parent | 09445a103eb4e6a0b881056c1dc5f4ca8a186671 (diff) | |
gpio: sta2x11: check the return value of irq_alloc_generic_chip()
This function can fail, so check the return value before dereferencing
the returned pointer.
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
| -rw-r--r-- | drivers/gpio/gpio-sta2x11.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/gpio/gpio-sta2x11.c b/drivers/gpio/gpio-sta2x11.c index 39df0620fa38..9e705162da8d 100644 --- a/drivers/gpio/gpio-sta2x11.c +++ b/drivers/gpio/gpio-sta2x11.c @@ -320,13 +320,16 @@ static irqreturn_t gsta_gpio_handler(int irq, void *dev_id) return ret; } -static void gsta_alloc_irq_chip(struct gsta_gpio *chip) +static int gsta_alloc_irq_chip(struct gsta_gpio *chip) { struct irq_chip_generic *gc; struct irq_chip_type *ct; gc = irq_alloc_generic_chip(KBUILD_MODNAME, 1, chip->irq_base, chip->reg_base, handle_simple_irq); + if (!gc) + return -ENOMEM; + gc->private = chip; ct = gc->chip_types; @@ -350,6 +353,8 @@ static void gsta_alloc_irq_chip(struct gsta_gpio *chip) } gc->irq_cnt = i - gc->irq_base; } + + return 0; } /* The platform device used here is instantiated by the MFD device */ @@ -400,7 +405,10 @@ static int gsta_probe(struct platform_device *dev) return err; } chip->irq_base = err; - gsta_alloc_irq_chip(chip); + + err = gsta_alloc_irq_chip(chip); + if (err) + return err; err = devm_request_irq(&dev->dev, pdev->irq, gsta_gpio_handler, IRQF_SHARED, KBUILD_MODNAME, chip); |