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 34a7110..f0208a9 100644 (file)
--- 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. */