Btrfs: fix ordered extent check in btrfs_punch_hole

If the ordered extent's last byte was 1 less than our region's
start byte, we would unnecessarily wait for the completion of
that ordered extent, because it doesn't intersect our target
range.

Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 6cd003c3f05ec318092b766fbc0e6322175911e2..740ae8c71701077de03396fc0c0bae377100ad4c 100644 (file)
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -2164,7 +2164,7 @@ static int btrfs_punch_hole(struct inode *inode, loff_t offset, loff_t len)
                 * we need to try again.
                 */
                if ((!ordered ||
-                   (ordered->file_offset + ordered->len < lockstart ||
+                   (ordered->file_offset + ordered->len <= lockstart ||
                     ordered->file_offset > lockend)) &&
                     !test_range_bit(&BTRFS_I(inode)->io_tree, lockstart,
                                     lockend, EXTENT_UPTODATE, 0,