[Xen-devel] [PATCH]Fix a racing condition for cpufreq dbs timer while S3 resuming

["Wei, Gang" <gang.wei@xxxxxxxxx>]

Fix a racing condition for cpufreq dbs timer while S3 resuming

The cpufreq_dbs_timer_suspend/resume may race with dbs_timer_init while s3 
resuming before this patch.
This patch along with cset 21030 fix the bug 1586 
http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1586.

Signed-off-by: Yu Ke <ke.yu@xxxxxxxxx>
Signed-off-by: Wei Gang <gang.wei@xxxxxxxxx>

diff -r c1f272c3a441 xen/drivers/cpufreq/cpufreq_ondemand.c
--- a/xen/drivers/cpufreq/cpufreq_ondemand.c    Mon Mar 15 17:08:29 2010 +0000
+++ b/xen/drivers/cpufreq/cpufreq_ondemand.c    Wed Mar 17 16:40:22 2010 +0800
@@ -211,6 +211,7 @@ static void dbs_timer_exit(struct cpu_db
 static void dbs_timer_exit(struct cpu_dbs_info_s *dbs_info)
 {
     dbs_info->enable = 0;
+    dbs_info->stoppable = 0;
     stop_timer(&dbs_timer[dbs_info->cpu]);
 }

Attachment: fix-s3-reboot.patch
Description: fix-s3-reboot.patch

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