From 7c2b564e54a4d89c01b381dc503d00ba5ce228b1 Mon Sep 17 00:00:00 2001
From: Evgeny Kuznetsov <ext-eugeny.kuznetsov@nokia.com>
Date: Tue, 7 Dec 2010 16:25:40 -0800
Subject: [PATCH] --- yaml --- r: 226461 b: refs/heads/master c:
 b1cc4c55c69efed3ebbb2a13e4c77a2a1a4a6bc9 h: refs/heads/master i:   226459:
 86f0229fca00f43840e30dece791382c61d8d29f v: v3

---
 [refs]                          | 2 +-
 trunk/arch/arm/plat-omap/gpio.c | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 813fec1529e6..7333ad129e63 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: be40f7a3d7b53c1a44e11b376b4a395d6b91f58d
+refs/heads/master: b1cc4c55c69efed3ebbb2a13e4c77a2a1a4a6bc9
diff --git a/trunk/arch/arm/plat-omap/gpio.c b/trunk/arch/arm/plat-omap/gpio.c
index c05c653d1674..e0e2fa725269 100644
--- a/trunk/arch/arm/plat-omap/gpio.c
+++ b/trunk/arch/arm/plat-omap/gpio.c
@@ -1318,6 +1318,10 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
 	if (bank->method == METHOD_GPIO_44XX)
 		isr_reg = bank->base + OMAP4_GPIO_IRQSTATUS0;
 #endif
+
+	if (WARN_ON(!isr_reg))
+		goto exit;
+
 	while(1) {
 		u32 isr_saved, level_mask = 0;
 		u32 enabled;
@@ -1377,6 +1381,7 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
 	configured, we must unmask the bank interrupt only after
 	handler(s) are executed in order to avoid spurious bank
 	interrupt */
+exit:
 	if (!unmasked)
 		desc->chip->unmask(irq);