[PATCH v1 4/5] gpio: max77620: Don't handle disabled interrupts

[Dmitry Osipenko <digetx-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

Check whether GPIO IRQ is enabled before proceeding with handling the
interrupt request. The interrupt handler now returns IRQ_NONE if none
of interrupts were handled, which is usually a sign of a problem.

Signed-off-by: Dmitry Osipenko <digetx-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 drivers/gpio/gpio-max77620.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpio/gpio-max77620.c b/drivers/gpio/gpio-max77620.c
index dd83c16a1ec6..8d54bc4307c2 100644
--- a/drivers/gpio/gpio-max77620.c
+++ b/drivers/gpio/gpio-max77620.c
@@ -37,7 +37,9 @@ static irqreturn_t max77620_gpio_irqhandler(int irq, void *data)
 		return IRQ_NONE;
 	}
 
-	pending = value;
+	pending = value & gpio->irq_enb_mask;
+	if (!pending)
+		return IRQ_NONE;
 
 	for_each_set_bit(offset, &pending, MAX77620_GPIO_NR) {
 		unsigned int virq;
-- 
2.26.0