From 7dd0e0af64afe4aa08ccdd167f64bd007f09b515 Mon Sep 17 00:00:00 2001 From: Len Brown Date: Wed, 27 May 2015 17:11:37 -0400 Subject: [PATCH] intel_idle: allow idle states to be freeze-mode specific intel_idle uses a NULL "enter" field in a cpuidle state to recognize the invalid entry terminating a variable-length array. Linux-4.0 added support for the system-wide "freeze" state in cpuidle drivers via the new "enter_freeze" field. The natural way to expose a deep idle state for freeze, but not for run-time idle is to supply "enter_freeze" without "enter"; so we update the driver to accept such states. Signed-off-by: Len Brown --- drivers/idle/intel_idle.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c index 2a36a95..008e943 100644 --- a/drivers/idle/intel_idle.c +++ b/drivers/idle/intel_idle.c @@ -965,7 +965,8 @@ static int __init intel_idle_cpuidle_driver_init(void) for (cstate = 0; cstate < CPUIDLE_STATE_MAX; ++cstate) { int num_substates, mwait_hint, mwait_cstate; - if (cpuidle_state_table[cstate].enter == NULL) + if ((cpuidle_state_table[cstate].enter == NULL) && + (cpuidle_state_table[cstate].enter_freeze == NULL)) break; if (cstate + 1 > max_cstate) { -- 2.7.4