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authorThomas Gleixner <tglx@linutronix.de>2008-11-06 01:13:39 +0100
committerThomas Gleixner <tglx@linutronix.de>2008-11-11 14:56:55 +0100
commita98f8fd24fb24fcb9a359553e64dd6aac5cf4279 (patch)
tree3e24247b653bf567ecb96a8cd4a2f9b6987a9682 /arch/x86
parentba21ebb6abac5c46e1d818d2ceda82420bd099ba (diff)
x86: apic reset counter on shutdown
Impact: avoid spurious lapic timer events on shutdown The apic timer might be close to firing when it is shutdown. We can not really disable the timer - we just mask the interrupt. That way we can get an extra interrupt when it is reenabled. Set the counter to max on shutdown to avoid this. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/kernel/apic.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kernel/apic.c b/arch/x86/kernel/apic.c
index 70879c9e393..1d410ee4b06 100644
--- a/arch/x86/kernel/apic.c
+++ b/arch/x86/kernel/apic.c
@@ -441,6 +441,7 @@ static void lapic_timer_setup(enum clock_event_mode mode,
v = apic_read(APIC_LVTT);
v |= (APIC_LVT_MASKED | LOCAL_TIMER_VECTOR);
apic_write(APIC_LVTT, v);
+ apic_write(APIC_TMICT, 0xffffffff);
break;
case CLOCK_EVT_MODE_RESUME:
/* Nothing to do here */