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-rw-r--r--drivers/idle/intel_idle.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index bcf1198e89..e486027f8b 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -1934,7 +1934,8 @@ static void __init spr_idle_state_table_update(void)
static bool __init intel_idle_verify_cstate(unsigned int mwait_hint)
{
- unsigned int mwait_cstate = MWAIT_HINT2CSTATE(mwait_hint) + 1;
+ unsigned int mwait_cstate = (MWAIT_HINT2CSTATE(mwait_hint) + 1) &
+ MWAIT_CSTATE_MASK;
unsigned int num_substates = (mwait_substates >> mwait_cstate * 4) &
MWAIT_SUBSTATE_MASK;