gpio: mpc8xxx: Prevent NULL pointer deref in demux handler

[pandora-kernel.git] / drivers / gpio / gpio-mpc8xxx.c

diff --git a/drivers/gpio/gpio-mpc8xxx.c b/drivers/gpio/gpio-mpc8xxx.c
index e6568c1..5a1817e 100644 (file)
--- a/drivers/gpio/gpio-mpc8xxx.c
+++ b/drivers/gpio/gpio-mpc8xxx.c
@@ -163,7 +163,8 @@ static void mpc8xxx_gpio_irq_cascade(unsigned int irq, struct irq_desc *desc)
        if (mask)
                generic_handle_irq(irq_linear_revmap(mpc8xxx_gc->irq,
                                                     32 - ffs(mask)));
-       chip->irq_eoi(&desc->irq_data);
+       if (chip->irq_eoi)
+               chip->irq_eoi(&desc->irq_data);
 }
 
 static void mpc8xxx_irq_unmask(struct irq_data *d)