[PATCH] ARM: OMAP: Add a loop to test for GPIO interrupts

On some OMAPs GPIO interrupts can be lost withouth this loop.
This patch was originally suggested by Ladislav Michl.

arch/arm/plat-omap/gpio.c

@@ -806,14 +806,15 @@ static void gpio_irq_handler(unsigned int irq, struct irqdesc *desc,
 		isr_reg = bank->base + OMAP24XX_GPIO_IRQSTATUS1;
 #endif
 
+	while(1) {
 		isr = __raw_readl((void __iomem *)isr_reg);
 		_enable_gpio_irqbank(bank, isr, 0);
 		_clear_gpio_irqbank(bank, isr);
 		_enable_gpio_irqbank(bank, isr, 1);
 		desc->chip->unmask(irq);
 
-	if (unlikely(!isr))
-		return;
+		if (!isr)
+			break;
 
 		gpio_irq = bank->virtual_irq_start;
 		for (; isr != 0; isr >>= 1, gpio_irq++) {
@@ -823,6 +824,7 @@ static void gpio_irq_handler(unsigned int irq, struct irqdesc *desc,
 			d = irq_desc + gpio_irq;
 			d->handle(gpio_irq, d, regs);
 		}
+        }
 }
 
 static void gpio_ack_irq(unsigned int irq)