x86/apic: Disable I/O APIC before shutdown of the local APIC

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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 <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/1382578212-4677-1-git-send-email-fenghua.yu@intel.com
Cc: <stable@kernel.org>
[ I suppose the 'issue' is a hang during shutdown. It's a fine change nevertheless. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>

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Fenghua Yu 2013-10-23 18:30:12 -07:00 • committed by Ingo Molnar

parent 5e01dc7b26

commit 522e664644

2 changed files with 5 additions and 5 deletions

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2

arch/x86/kernel/crash.c

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8

arch/x86/kernel/reboot.c

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