From 8329aa9fff3fca84009e6a444d8d160193643bac Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Fri, 13 Feb 2015 10:26:18 -0800 Subject: [PATCH] Revert "x86/apic: Only disable CPU x2apic mode when necessary" This reverts commit 5fcee53ce705d49c766f8a302c7e93bdfc33c124. It causes the suspend to fail on at least the Chromebook Pixel, possibly other platforms too. Joerg Roedel points out that the logic should probably have been if (max_physical_apicid > 255 || !(IS_ENABLED(CONFIG_HYPERVISOR_GUEST) && hypervisor_x2apic_available())) { instead, but since the code is not in any fast-path, so we can just live without that optimization and just revert to the original code. Acked-by: Joerg Roedel Acked-by: Jiang Liu Signed-off-by: Linus Torvalds --- arch/x86/kernel/apic/apic.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index b665d241efad..ad3639ae1b9b 100644 --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -1580,8 +1580,7 @@ static __init void try_to_enable_x2apic(int remap_mode) * under KVM */ if (max_physical_apicid > 255 || - (IS_ENABLED(CONFIG_HYPERVISOR_GUEST) && - !hypervisor_x2apic_available())) { + !hypervisor_x2apic_available()) { pr_info("x2apic: IRQ remapping doesn't support X2APIC mode\n"); x2apic_disable(); return; -- 2.20.1