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Commit 76b461c2 authored by Venkatesh Pallipadi's avatar Venkatesh Pallipadi Committed by Linus Torvalds
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[PATCH] x86_64: Only switch to IPI broadcast timer on Intel when C3 is supported 



Bug in apic timer removal on C3 patch. We should switch to IPI from APIC timer
only when C3 state is valid.

Signed-off-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: default avatarAndi Kleen <ak@suse.de>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 226d7809

drivers/acpi/processor_idle.c

+1 −1
Original line number Diff line number Diff line
@@ -899,7 +899,7 @@ static int acpi_processor_power_verify(struct acpi_processor *pr) 
		case ACPI_STATE_C3:

			acpi_processor_power_verify_c3(pr, cx);

#ifdef ARCH_APICTIMER_STOPS_ON_C3

			if (c->x86_vendor == X86_VENDOR_INTEL) {

			if (cx->valid && c->x86_vendor == X86_VENDOR_INTEL) {

				on_each_cpu(switch_APIC_timer_to_ipi,

						&mask, 1, 1);

			}