linux-kernel - [PATCH] PM: avoid 'autosleep' in shutdown progress

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Date:	Thu, 11 Jul 2013 16:03:45 +0800
From:	shuox.liu@...el.com
To:	linux-kernel@...r.kernel.org
Cc:	len.brown@...el.com, pavel@....cz, rjw@...k.pl,
	yanmin_zhang@...ux.intel.com, linux-pm@...r.kernel.org
Subject: [PATCH] PM: avoid 'autosleep' in shutdown progress

From: Liu ShuoX <shuox.liu@...el.com>

In shutdown progress, system is possible to do power transition
(such as suspend-to-ram) in parallel. It is unreasonable. So,
fixes it by adding a system_state checking and queue try_to_suspend
again when system status is not running.

Signed-off-by: Liu ShuoX <shuox.liu@...el.com>
---
 kernel/power/autosleep.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/kernel/power/autosleep.c b/kernel/power/autosleep.c
index c6422ff..9012ecf 100644
--- a/kernel/power/autosleep.c
+++ b/kernel/power/autosleep.c
@@ -32,7 +32,8 @@ static void try_to_suspend(struct work_struct *work)
 
 	mutex_lock(&autosleep_lock);
 
-	if (!pm_save_wakeup_count(initial_count)) {
+	if (!pm_save_wakeup_count(initial_count) ||
+		system_state != SYSTEM_RUNNING) {
 		mutex_unlock(&autosleep_lock);
 		goto out;
 	}
-- 
1.7.1

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