dm ioctl: only issue uevent on resume if state changed

Only issue a uevent on a resume if the state of the device changed,
i.e. if it was suspended and/or its table was replaced.

Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@kernel.org
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index 1d66932..e3cf568 100644 (file)
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -897,16 +897,17 @@ static int do_resume(struct dm_ioctl *param)
                        set_disk_ro(dm_disk(md), 1);
        }
 
-       if (dm_suspended_md(md))
+       if (dm_suspended_md(md)) {
                r = dm_resume(md);
+               if (!r)
+                       dm_kobject_uevent(md, KOBJ_CHANGE, param->event_nr);
+       }
 
        if (old_map)
                dm_table_destroy(old_map);
 
-       if (!r) {
-               dm_kobject_uevent(md, KOBJ_CHANGE, param->event_nr);
+       if (!r)
                r = __dev_status(md, param);
-       }
 
        dm_put(md);
        return r;