watchdog: xen: don't unconditionally enable the watchdog during resume
This was found to be a problem particularly after guest migration.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reported-by: Wouter de Geus <benv-xensource.com@junerules.com>
Reported-by: Ian Campbell <Ian.Campbell@citrix.com>
Tested-by: Wouter de Geus <benv-xensource.com@junerules.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
diff --git a/drivers/watchdog/xen_wdt.c b/drivers/watchdog/xen_wdt.c
index 79aa7f9..e04fd6c 100644
--- a/drivers/watchdog/xen_wdt.c
+++ b/drivers/watchdog/xen_wdt.c
@@ -296,11 +296,18 @@
static int xen_wdt_suspend(struct platform_device *dev, pm_message_t state)
{
- return xen_wdt_stop();
+ typeof(wdt.id) id = wdt.id;
+ int rc = xen_wdt_stop();
+
+ wdt.id = id;
+ return rc;
}
static int xen_wdt_resume(struct platform_device *dev)
{
+ if (!wdt.id)
+ return 0;
+ wdt.id = 0;
return xen_wdt_start();
}