1 files changed, 1 insertions, 0 deletions

diff --git a/arch/x86/kernel/io_apic_32.c b/arch/x86/kernel/io_apic_32.c
index ce682e873aa7..b381f93b79ae 100644
--- a/arch/x86/kernel/io_apic_32.c
+++ b/arch/x86/kernel/io_apic_32.c
@@ -2185,6 +2185,7 @@ static inline void __init check_timer(void)
                  * legacy devices should be connected to IO APIC #0
                  */
                 setup_timer_IRQ0_pin(apic2, pin2, vector);
+                unmask_IO_APIC_irq(0);
                 enable_8259A_irq(0);
                 if (timer_irq_works()) {
                         printk("works.\n");