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-rw-r--r--arch/x86/kernel/io_apic_32.c1
-rw-r--r--arch/x86/kernel/io_apic_64.c1
2 files changed, 2 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");
diff --git a/arch/x86/kernel/io_apic_64.c b/arch/x86/kernel/io_apic_64.c
index 6c4635fa97a6..0e20b7d7c1c7 100644
--- a/arch/x86/kernel/io_apic_64.c
+++ b/arch/x86/kernel/io_apic_64.c
@@ -1691,6 +1691,7 @@ static inline void __init check_timer(void)
* legacy devices should be connected to IO APIC #0
*/
setup_timer_IRQ0_pin(apic2, pin2, cfg->vector);
+ unmask_IO_APIC_irq(0);
enable_8259A_irq(0);
if (timer_irq_works()) {
apic_printk(APIC_VERBOSE," works.\n");