From: Todd Poynor <toddpoynor@google.com>
Date: Mon, 18 Jul 2011 14:43:14 +0000 (-0700)
Subject: gpio/omap: check return value from irq_alloc_generic_chip
X-Git-Tag: v3.2-rc2~4^2^2
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=832337490f22987a1b739ba840e105c0c9af01bc;p=karo-tx-linux.git

gpio/omap: check return value from irq_alloc_generic_chip

Ensure return value of irq_alloc_generic_chip() is checked before continuing
on to use it.

Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>
---

diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index 34a7110d9bc8..f0208a958185 100644
--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -1090,6 +1090,11 @@ omap_mpuio_alloc_gc(struct gpio_bank *bank, unsigned int irq_start,
 
 	gc = irq_alloc_generic_chip("MPUIO", 1, irq_start, bank->base,
 				    handle_simple_irq);
+	if (!gc) {
+		dev_err(bank->dev, "Memory alloc failed for gc\n");
+		return;
+	}
+
 	ct = gc->chip_types;
 
 	/* NOTE: No ack required, reading IRQ status clears it. */