1 files changed, 8 insertions, 1 deletions

diff --git a/arch/arm/plat-samsung/irq-uart.c b/arch/arm/plat-samsung/irq-uart.c
index 32582c0958e3..657405c481d0 100644
--- a/arch/arm/plat-samsung/irq-uart.c
+++ b/arch/arm/plat-samsung/irq-uart.c
@@ -54,8 +54,15 @@ static void __init s3c_init_uart_irq(struct s3c_uart_irq *uirq)
 
         gc = irq_alloc_generic_chip("s3c-uart", 1, uirq->base_irq, reg_base,
                                     handle_level_irq);
+
+        if (!gc) {
+                pr_err("%s: irq_alloc_generic_chip for IRQ %u failed\n",
+                       __func__, uirq->base_irq);
+                return;
+        }
+
         ct = gc->chip_types;
-        ct->chip.irq_ack = irq_gc_ack;
+        ct->chip.irq_ack = irq_gc_ack_set_bit;
         ct->chip.irq_mask = irq_gc_mask_set_bit;
         ct->chip.irq_unmask = irq_gc_mask_clr_bit;
         ct->regs.ack = S3C64XX_UINTP;