From d8c3245c97490cb68ceaa983b5fce19055b4e331 Mon Sep 17 00:00:00 2001 From: Fenghua Yu Date: Wed, 23 Oct 2013 18:30:12 -0700 Subject: [PATCH] x86/apic: Disable I/O APIC before shutdown of the local APIC commit 522e66464467543c0d88d023336eec4df03ad40b upstream. In reboot and crash path, when we shut down the local APIC, the I/O APIC is still active. This may cause issues because external interrupts can still come in and disturb the local APIC during shutdown process. To quiet external interrupts, disable I/O APIC before shutdown local APIC. Signed-off-by: Fenghua Yu Link: http://lkml.kernel.org/r/1382578212-4677-1-git-send-email-fenghua.yu@intel.com [ I suppose the 'issue' is a hang during shutdown. It's a fine change nevertheless. ] Signed-off-by: Ingo Molnar [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings --- Reading git-format-patch failed