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>

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;