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authorBartosz Golaszewski <brgl@bgdev.pl>2017-05-25 10:37:37 +0200
committerLinus Walleij <linus.walleij@linaro.org>2017-05-29 13:33:42 +0200
commitd76e8babe420edbf9f9f9c78e42ef01f0e62dc07 (patch)
tree23d83d6663f192c2e2189b6a2f94cb3ca0c1b7c2 /drivers/gpio/gpio-sta2x11.c
parent09445a103eb4e6a0b881056c1dc5f4ca8a186671 (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>
Diffstat (limited to 'drivers/gpio/gpio-sta2x11.c')
-rw-r--r--drivers/gpio/gpio-sta2x11.c12
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);