genirq: Prevent potential NULL dereference in irq_set_irq_wake()

[pandora-kernel.git] / kernel / irq / manage.c

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index d64bafb..0a7840a 100644 (file)
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -491,6 +491,9 @@ int irq_set_irq_wake(unsigned int irq, unsigned int on)
        struct irq_desc *desc = irq_get_desc_buslock(irq, &flags);
        int ret = 0;
 
        struct irq_desc *desc = irq_get_desc_buslock(irq, &flags);
        int ret = 0;
 

+       if (!desc)
+               return -EINVAL;
+

        /* wakeup-capable irqs can be shared between drivers that
         * don't need to have the same sleep mode behaviors.
         */
        /* wakeup-capable irqs can be shared between drivers that
         * don't need to have the same sleep mode behaviors.
         */