UBI: get device when opening volume

When a volume is opened, get its kref via get_device() call.
And put the reference when closing the volume. With this, we
may have a bit saner volume delete.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

1 files changed, 0 insertions, 5 deletions

diff --git a/drivers/mtd/ubi/vmt.c b/drivers/mtd/ubi/vmt.c
index ec2dd3c65c43..9dd3689aecd3 100644
--- a/drivers/mtd/ubi/vmt.c
+++ b/drivers/mtd/ubi/vmt.c
@@ -435,7 +435,6 @@ int ubi_remove_volume(struct ubi_volume_desc *desc)
         vol->eba_tbl = NULL;
         cdev_del(&vol->cdev);
         volume_sysfs_close(vol);
-        kfree(desc);
 
         spin_lock(&ubi->volumes_lock);
         ubi->rsvd_pebs -= reserved_pebs;
@@ -453,10 +452,6 @@ int ubi_remove_volume(struct ubi_volume_desc *desc)
         spin_unlock(&ubi->volumes_lock);
 
         paranoid_check_volumes(ubi);
-        mutex_unlock(&ubi->volumes_mutex);
-        module_put(THIS_MODULE);
-        return 0;
-
 out:
         mutex_unlock(&ubi->volumes_mutex);
         return err;