ext4: Return exchanged blocks count to user space in failure

Return exchanged blocks count (moved_len) to user space,
if ext4_move_extents() failed on the way.

Signed-off-by: Akira Fujita <a-fujita@rs.jp.nec.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

1 files changed, 3 insertions, 4 deletions

diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 7050a9cd04a4..c1cdf613e725 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -243,10 +243,9 @@ setversion_out:
                                         me.donor_start, me.len, &me.moved_len);
                 fput(donor_filp);
 
-                if (!err)
-                        if (copy_to_user((struct move_extent *)arg,
-                                &me, sizeof(me)))
-                                return -EFAULT;
+                if (copy_to_user((struct move_extent *)arg, &me, sizeof(me)))
+                        return -EFAULT;
+
                 return err;
         }