gpio: pca953x: remove redundant variable and check in IRQ handler

We always will have at least one iteration of the loop due to pending
being guaranteed to be non-zero.  That is, we may remove extra variable
and check in the IRQ handler.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Andy Shevchenko <[email protected]>
Acked-by: Linus Walleij <[email protected]>
Cc: Bartosz Golaszewski <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Cc: Marek Vasut <[email protected]>
Cc: Rasmus Villemoes <[email protected]>
Cc: Thomas Petazzoni <[email protected]>
Cc: William Breathitt Gray <[email protected]>
Cc: Yury Norov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

Author: andy-shev

drivers/gpio/gpio-pca953x.c

@@ -743,7 +743,6 @@ static irqreturn_t pca953x_irq_handler(int irq, void *devid)
 	struct pca953x_chip *chip = devid;
 	u8 pending[MAX_BANK];
 	u8 level;
-	unsigned nhandled = 0;
 	int i;
 
 	if (!pca953x_irq_pending(chip, pending))
@@ -755,11 +754,10 @@ static irqreturn_t pca953x_irq_handler(int irq, void *devid)
 			handle_nested_irq(irq_find_mapping(chip->gpio_chip.irq.domain,
 							level + (BANK_SZ * i)));
 			pending[i] &= ~(1 << level);
-			nhandled++;
 		}
 	}
 
-	return (nhandled > 0) ? IRQ_HANDLED : IRQ_NONE;
+	return IRQ_HANDLED;
 }
 
 static int pca953x_irq_setup(struct pca953x_chip *chip,