gpio: 104-idio-16: Return IRQ_NONE if all relevant GPIO lines are masked

PATCH New William Breathitt Gray 1 participant 1 message Jan 20, 2016

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GPIO Acces 104-idio-16 GPIO driver

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William Breathitt Gray

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2016-01-20 18:20 UTC #0 lore raw

PATCH 1/1 gpio: 104-idio-16: Return IRQ_NONE if all relevant GPIO lines are masked

If the irq_mask member has a value of 0, then interrupts are disabled on the device. Therefore, IRQ_NONE should be returned if the irq_mask member is 0.

Signed-off-by William Breathitt Gray <[email protected]>

---
 drivers/gpio/gpio-104-idio-16.c | 3 +++
 1 file changed, 3 insertions(+)

drivers/gpio/gpio-104-idio-16.c +3 -0

index 4d69b50..09fe032 100644
@@ -175,6 +175,9 @@ static irqreturn_t idio_16_irq_handler(int irq, void *dev_id)
 	struct gpio_chip *const chip = &idio16gpio->chip;
 	int gpio;
 
+	if (!idio16gpio->irq_mask)
+		return IRQ_NONE;
+
 	for_each_set_bit(gpio, &idio16gpio->irq_mask, chip->ngpio)
 		generic_handle_irq(irq_find_mapping(chip->irqdomain, gpio));

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