diff options
Diffstat (limited to 'drivers/gpio/gpiolib.c')
| -rw-r--r-- | drivers/gpio/gpiolib.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 340b021..a68c6d7 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1999,13 +1999,22 @@ EXPORT_SYMBOL_GPL(gpiod_cansleep); */ int gpiod_to_irq(const struct gpio_desc *desc) { - struct gpio_chip *chip; - int offset; + struct gpio_chip *chip; + int offset; VALIDATE_DESC(desc); chip = desc->gdev->chip; offset = gpio_chip_hwgpio(desc); - return chip->to_irq ? chip->to_irq(chip, offset) : -ENXIO; + if (chip->to_irq) { + int retirq = chip->to_irq(chip, offset); + + /* Zero means NO_IRQ */ + if (!retirq) + return -ENXIO; + + return retirq; + } + return -ENXIO; } EXPORT_SYMBOL_GPL(gpiod_to_irq); |
