x86: fix 32-bit ioapic lockup with sparseirqs

Missed two lines when copying.

Fix panic on one of Ingo's machines that need to adjust ioapic id when
acpi off/ 32bit.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/x86/kernel/io_apic.c b/arch/x86/kernel/io_apic.c
index 7ca556690474..4e44fd1f466e 100644
--- a/arch/x86/kernel/io_apic.c
+++ b/arch/x86/kernel/io_apic.c
@@ -2077,6 +2077,8 @@ static void __init setup_ioapic_ids_from_mpc(void)
 
                 reg_00.bits.ID = mp_ioapics[apic].mp_apicid;
                 spin_lock_irqsave(&ioapic_lock, flags);
+                io_apic_write(apic, 0, reg_00.raw);
+                spin_unlock_irqrestore(&ioapic_lock, flags);
 
                 /*
                  * Sanity check