commit c25d29952b2a8c9aaf00e081c9162a0e383030cd
author Len Brown <len.brown@intel.com> Sat Oct 23 23:25:53 2010 -0400
committer Len Brown <len.brown@intel.com> Tue Oct 26 15:45:17 2010 -0400
tree 8265cf39b244db917b56f31bfbb0c1452c465e7d
parent 00527cc6bbcac05ab7d54c40bda1ff2a0625ab10

intel_idle: do not use the LAPIC timer for ATOM C2

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

diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index d310590..b68d594 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -302,7 +302,7 @@
 
 	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;