1 files changed, 2 insertions, 1 deletions

diff --git a/arch/alpha/kernel/irq_i8259.c b/arch/alpha/kernel/irq_i8259.c
index 39299fbb637..9e493958895 100644
--- a/arch/alpha/kernel/irq_i8259.c
+++ b/arch/alpha/kernel/irq_i8259.c
@@ -79,7 +79,8 @@ i8259a_startup_irq(unsigned int irq)
 void
 i8259a_end_irq(unsigned int irq)
 {
-        if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
+        struct irq_desc *desc = irq_to_desc(irq);
+        if (desc || !(desc->status & (IRQ_DISABLED|IRQ_INPROGRESS)))
                 i8259a_enable_irq(irq);
 }