md: clean up do_md_stop

There is only one error exit from do_md_stop, so make that more
explicit and discard the 'err' variable.
Also drop the 'revalidate' variable by moving the unlock calls around.

Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 9 insertions, 16 deletions

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 03dcbfbe250f..d44efb267a69 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -4767,7 +4767,6 @@ out:
  */
 static int do_md_stop(mddev_t * mddev, int mode, int is_open)
 {
-        int err = 0, revalidate = 0;
         struct gendisk *disk = mddev->gendisk;
         mdk_rdev_t *rdev;
 
@@ -4775,9 +4774,11 @@ static int do_md_stop(mddev_t * mddev, int mode, int is_open)
         if (atomic_read(&mddev->openers) > is_open ||
             mddev->sysfs_active) {
                 printk("md: %s still in use.\n",mdname(mddev));
-                err = -EBUSY;
-        } else if (mddev->pers) {
+                mutex_unlock(&mddev->open_mutex);
+                return -EBUSY;
+        }
 
+        if (mddev->pers) {
                 if (mddev->ro)
                         set_disk_ro(disk, 0);
 
@@ -4798,23 +4799,17 @@ static int do_md_stop(mddev_t * mddev, int mode, int is_open)
                         }
 
                 set_capacity(disk, 0);
-                revalidate = 1;
+                mutex_unlock(&mddev->open_mutex);
+                revalidate_disk(disk);
 
                 if (mddev->ro)
                         mddev->ro = 0;
-                
-                err = 0;
-        }
-        mutex_unlock(&mddev->open_mutex);
-        if (revalidate)
-                revalidate_disk(disk);
-        if (err)
-                return err;
+        } else
+                mutex_unlock(&mddev->open_mutex);
         /*
          * Free resources if final stop
          */
         if (mode == 0) {
-
                 printk(KERN_INFO "md: %s stopped.\n", mdname(mddev));
 
                 bitmap_destroy(mddev);
@@ -4831,13 +4826,11 @@ static int do_md_stop(mddev_t * mddev, int mode, int is_open)
                 kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE);
                 if (mddev->hold_active == UNTIL_STOP)
                         mddev->hold_active = 0;
-
         }
-        err = 0;
         blk_integrity_unregister(disk);
         md_new_event(mddev);
         sysfs_notify_dirent_safe(mddev->sysfs_state);
-        return err;
+        return 0;
 }
 
 #ifndef MODULE