[PATCH] device-mapper: Fix dm_swap_table error cases
Fix dm_swap_table() __bind error cases: a missing unlock, and EINVAL
preferable to EPERM.
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index bb3ad79..54fabbf 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -966,23 +966,20 @@
*/
int dm_swap_table(struct mapped_device *md, struct dm_table *table)
{
- int r;
+ int r = -EINVAL;
down_write(&md->lock);
/* device must be suspended */
- if (!test_bit(DMF_SUSPENDED, &md->flags)) {
- up_write(&md->lock);
- return -EPERM;
- }
+ if (!test_bit(DMF_SUSPENDED, &md->flags))
+ goto out;
__unbind(md);
r = __bind(md, table);
- if (r)
- return r;
+out:
up_write(&md->lock);
- return 0;
+ return r;
}
/*