| commit | 6f9b41006af1bc489030f84ee247abc0df1edccd | |
| author | Andreas Herrmann <herrmann.der.user@googlemail.com> | |
| Tue, 27 Oct 2009 10:01:38 +0000 (27 11:01 +0100) | ||
| committer | Ingo Molnar <mingo@elte.hu> | |
| Tue, 27 Oct 2009 13:54:21 +0000 (27 14:54 +0100) | ||
| tree | 94bbecb0774d1a82dfb87b3db64c876e4693bf0d | treesnapshot (tar.gz zip) |
| parent | f88f2b4fdb1e098433ad2b005b6f7353f7268ce1 | commitdiff |
x86, apic: Clear APIC Timer Initial Count Register on shutdown
Commit a98f8fd24fb24fcb9a359553e64dd6aac5cf4279 (x86: apic reset
counter on shutdown) set the counter to max to avoid spurious
interrupts when the timer is re-enabled.
(In theory) you'll still get a spurious interrupt if spending
more than 344 seconds with this interrupt disabled and then
unmasking it.
The right thing to do is to clear the register. This disables
the interrupt from happening (at least it does on AMD hardware).
Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
LKML-Reference: <20091027100138.GB30802@alberich.amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Commit a98f8fd24fb24fcb9a359553e64dd6aac5cf4279 (x86: apic reset
counter on shutdown) set the counter to max to avoid spurious
interrupts when the timer is re-enabled.
(In theory) you'll still get a spurious interrupt if spending
more than 344 seconds with this interrupt disabled and then
unmasking it.
The right thing to do is to clear the register. This disables
the interrupt from happening (at least it does on AMD hardware).
Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
LKML-Reference: <20091027100138.GB30802@alberich.amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| arch/x86/kernel/apic/apic.c | diffblobblamehistory |