From: Aurelien Jarno <aurel...@aurel32.net>
Don't overflow when computing the 64-bit period from 32-bit registers.
Fixes sourceforge bug #2826486.
Signed-off-by: Aurelien Jarno <aurel...@aurel32.net>
Cc: sta...@kernel.org
Signed-off-by: Marcelo Tosatti <mtosa...@redhat.com>
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 9c8f901..3ca7767 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -658,7 +658,7 @@ static void start_apic_timer(struct kvm_lapic *apic)
{
ktime_t now = apic->lapic_timer.timer.base->get_time();
- apic->lapic_timer.period = apic_get_reg(apic, APIC_TMICT) *
+ apic->lapic_timer.period = (u64)apic_get_reg(apic, APIC_TMICT) *
APIC_BUS_CYCLE_NS * apic->divide_count;
atomic_set(&apic->lapic_timer.pending, 0);
--
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