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>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index 34a7110d9bc..f0208a95818 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. */