diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpio/gpiolib.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 74f3af2d8ca0..940180b5704e 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1858,6 +1858,16 @@ static void gpiochip_set_irq_hooks(struct gpio_chip *gpiochip) } if (WARN_ON(gpiochip->irq.irq_enable)) return; + /* Check if the irqchip already has this hook... */ + if (irqchip->irq_enable == gpiochip_irq_enable) { + /* + * ...and if so, give a gentle warning that this is bad + * practice. + */ + chip_info(gpiochip, + "detected irqchip that is shared with multiple gpiochips: please fix the driver.\n"); + return; + } gpiochip->irq.irq_enable = irqchip->irq_enable; gpiochip->irq.irq_disable = irqchip->irq_disable; irqchip->irq_enable = gpiochip_irq_enable; |