From: Ralph Walden <ralphw@everest-co.com>
Date: Mon, 5 Sep 2005 07:46:34 +0000 (+0300)
Subject: [PATCH] ARM: OMAP: Add a loop to test for GPIO interrupts
X-Git-Tag: v2.6.13-omap1~7
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=743daad9f59cc5a67951d5e11b3efada943a7494;p=linux-2.6-omap-h63xx.git

[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.
---

diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c
index c4fb50ed5ed..2a53e090f8e 100644
--- a/arch/arm/plat-omap/gpio.c
+++ b/arch/arm/plat-omap/gpio.c
@@ -806,23 +806,25 @@ static void gpio_irq_handler(unsigned int irq, struct irqdesc *desc,
 		isr_reg = bank->base + OMAP24XX_GPIO_IRQSTATUS1;
 #endif
 
-	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;
+	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 (!isr)
+			break;
 
-	gpio_irq = bank->virtual_irq_start;
-	for (; isr != 0; isr >>= 1, gpio_irq++) {
-		struct irqdesc *d;
-		if (!(isr & 1))
-			continue;
-		d = irq_desc + gpio_irq;
-		d->handle(gpio_irq, d, regs);
-	}
+		gpio_irq = bank->virtual_irq_start;
+		for (; isr != 0; isr >>= 1, gpio_irq++) {
+			struct irqdesc *d;
+			if (!(isr & 1))
+				continue;
+			d = irq_desc + gpio_irq;
+			d->handle(gpio_irq, d, regs);
+		}
+        }
 }
 
 static void gpio_ack_irq(unsigned int irq)