From: Rafael J. Wysocki <rjw@sisk.pl>
Date: Thu, 22 Mar 2007 08:11:20 +0000 (-0800)
Subject: [PATCH] swsusp: Fix SNAPSHOT_S2RAM ioctl
X-Git-Tag: v2.6.21-rc5~41
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=93c9a7ff50a5b39dbdf80129c5da89e6d6256bea;p=linux-2.6

[PATCH] swsusp: Fix SNAPSHOT_S2RAM ioctl

The SNAPSHOT_S2RAM ioctl does not disable the nonboot CPUs before entering
the suspend, although it should do this.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/kernel/power/user.c b/kernel/power/user.c
index d6a8dcc26a..bf211fee12 100644
--- a/kernel/power/user.c
+++ b/kernel/power/user.c
@@ -368,9 +368,12 @@ static int snapshot_ioctl(struct inode *inode, struct file *filp,
 		if (error) {
 			printk(KERN_ERR "Failed to suspend some devices.\n");
 		} else {
-			/* Enter S3, system is already frozen */
-			suspend_enter(PM_SUSPEND_MEM);
-
+			error = disable_nonboot_cpus();
+			if (!error) {
+				/* Enter S3, system is already frozen */
+				suspend_enter(PM_SUSPEND_MEM);
+				enable_nonboot_cpus();
+			}
 			/* Wake up devices */
 			device_resume();
 		}