linux-kernel - [PATCH -mm] swsusp: Use reasonable default for hibernation

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Message-Id: <200705082246.17166.rjw@sisk.pl>
Date:	Tue, 8 May 2007 22:46:16 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Johannes Berg <johannes@...solutions.net>,
	LKML <linux-kernel@...r.kernel.org>, Pavel Machek <pavel@....cz>,
	Nigel Cunningham <nigel@...el.suspend2.net>,
	Pekka Enberg <penberg@...helsinki.fi>
Subject: [PATCH -mm] swsusp: Use reasonable default for hibernation_mode

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

Make sure that hibernation_mode is set to a reasonable value by default.

Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
---
 kernel/power/disk.c |    9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

Index: linux-2.6.21/kernel/power/disk.c
===================================================================
--- linux-2.6.21.orig/kernel/power/disk.c	2007-05-06 14:40:12.000000000 +0200
+++ linux-2.6.21/kernel/power/disk.c	2007-05-08 22:12:02.000000000 +0200
@@ -30,8 +30,6 @@ char resume_file[256] = CONFIG_PM_STD_PA
 dev_t swsusp_resume_device;
 sector_t swsusp_resume_block;
 
-static int hibernation_mode;
-
 enum {
 	HIBERNATION_INVALID,
 	HIBERNATION_PLATFORM,
@@ -45,6 +43,8 @@ enum {
 #define HIBERNATION_MAX (__HIBERNATION_AFTER_LAST-1)
 #define HIBERNATION_FIRST (HIBERNATION_INVALID + 1)
 
+static int hibernation_mode = HIBERNATION_SHUTDOWN;
+
 struct hibernation_ops *hibernation_ops;
 
 /**
@@ -60,6 +60,11 @@ void hibernation_set_ops(struct hibernat
 	}
 	mutex_lock(&pm_mutex);
 	hibernation_ops = ops;
+	if (ops)
+		hibernation_mode = HIBERNATION_PLATFORM;
+	else if (hibernation_mode == HIBERNATION_PLATFORM)
+		hibernation_mode = HIBERNATION_SHUTDOWN;
+
 	mutex_unlock(&pm_mutex);
 }
 
-
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