linux-kernel - [PATCH 2/3] PM / cpuidle: Make ladder governor use the "disabled" state flag

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Message-Id: <201208140022.12197.rjw@sisk.pl>
Date:	Tue, 14 Aug 2012 00:22:11 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Linux PM list <linux-pm@...r.kernel.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	"Linux-sh list" <linux-sh@...r.kernel.org>,
	Magnus Damm <magnus.damm@...il.com>
Subject: [PATCH 2/3] PM / cpuidle: Make ladder governor use the "disabled" state flag


For the mechanism introduced by commit cbc9ef0 (PM / Domains: Add
preliminary support for cpuidle, v2) to work with the ladder
governor, that governor should respect the "disabled" state flag
added by that commit.  Change the ladder governor accordingly.

Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
---
 drivers/cpuidle/governors/ladder.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Index: linux/drivers/cpuidle/governors/ladder.c
===================================================================
--- linux.orig/drivers/cpuidle/governors/ladder.c
+++ linux/drivers/cpuidle/governors/ladder.c
@@ -88,6 +88,7 @@ static int ladder_select_state(struct cp
 
 	/* consider promotion */
 	if (last_idx < drv->state_count - 1 &&
+	    !drv->states[last_idx + 1].disabled &&
 	    !dev->states_usage[last_idx + 1].disable &&
 	    last_residency > last_state->threshold.promotion_time &&
 	    drv->states[last_idx + 1].exit_latency <= latency_req) {
@@ -101,7 +102,8 @@ static int ladder_select_state(struct cp
 
 	/* consider demotion */
 	if (last_idx > CPUIDLE_DRIVER_STATE_START &&
-	    (dev->states_usage[last_idx].disable ||
+	    (drv->states[last_idx].disabled ||
+	    dev->states_usage[last_idx].disable ||
 	    drv->states[last_idx].exit_latency > latency_req)) {
 		int i;
 

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