linux-kernel - [PATCH 5/5 v1] PM / Domains: Do not restore all devices on power off error

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Message-Id: <201107062301.22277.rjw@sisk.pl>
Date:	Wed, 6 Jul 2011 23:01:21 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Linux PM mailing list <linux-pm@...ts.linux-foundation.org>
Cc:	LKML <linux-kernel@...r.kernel.org>, Kevin Hilman <khilman@...com>,
	Alan Stern <stern@...land.harvard.edu>,
	MyungJoo Ham <myungjoo.ham@...sung.com>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Paul Walmsley <paul@...an.com>, Greg KH <gregkh@...e.de>,
	Magnus Damm <magnus.damm@...il.com>
Subject: [PATCH 5/5 v1] PM / Domains: Do not restore all devices on power off error

From: Rafael J. Wysocki <rjw@...k.pl>

Since every device in a PM domain has its own need_restore
flag, which is set by __pm_genpd_save_device(), there's no need to
walk the domain's device list and restore all devices on an error
from one of the drivers' .runtime_suspend() callbacks.

Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
---
 drivers/base/power/domain.c |    3 ---
 1 file changed, 3 deletions(-)

Index: linux-2.6/drivers/base/power/domain.c
===================================================================
--- linux-2.6.orig/drivers/base/power/domain.c
+++ linux-2.6/drivers/base/power/domain.c
@@ -299,9 +299,6 @@ static int pm_genpd_poweroff(struct gene
 	return 0;
 
  err_dev:
-	list_for_each_entry_continue(dle, &genpd->dev_list, node)
-		__pm_genpd_restore_device(dle, genpd);
-
 	genpd_set_active(genpd);
 	wake_up_all(&genpd->status_wait_queue);
 

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