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intel_idle: do not use the LAPIC timer for ATOM C2
author
Len Brown
<len.brown@intel.com>
Sun, 24 Oct 2010 03:25:53 +0000
(23:25 -0400)
committer
Len Brown
<len.brown@intel.com>
Tue, 26 Oct 2010 19:45:17 +0000
(15:45 -0400)
If we use the LAPIC timer during ATOM C2 on
some nvidia chisets, the system stalls.
https://bugzilla.kernel.org/show_bug.cgi?id=21032
Signed-off-by: Len Brown <len.brown@intel.com>
drivers/idle/intel_idle.c
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diff --git
a/drivers/idle/intel_idle.c
b/drivers/idle/intel_idle.c
index
d310590
..
b68d594
100644
(file)
--- a/
drivers/idle/intel_idle.c
+++ b/
drivers/idle/intel_idle.c
@@
-302,7
+302,7
@@
static int intel_idle_probe(void)
case 0x1C: /* 28 - Atom Processor */
case 0x26: /* 38 - Lincroft Atom Processor */
- lapic_timer_reliable_states = (1 <<
2) | (1 << 1); /* C2,
C1 */
+ lapic_timer_reliable_states = (1 <<
1); /*
C1 */
cpuidle_state_table = atom_cstates;
break;