Btrfs: remove unnecessary code in btree_get_extent()

Unnecessary lookup_extent_mapping() is removed because an error is
returned to the caller.
This patch was made based on the advice from Stefan Behrens, thanks.

Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>

1 files changed, 1 insertions, 7 deletions

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 8db87bc53d27..8d633e3e3919 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -217,16 +217,10 @@ static struct extent_map *btree_get_extent(struct inode *inode,
         write_lock(&em_tree->lock);
         ret = add_extent_mapping(em_tree, em);
         if (ret == -EEXIST) {
-                u64 failed_start = em->start;
-                u64 failed_len = em->len;
-
                 free_extent_map(em);
                 em = lookup_extent_mapping(em_tree, start, len);
-                if (!em) {
-                        lookup_extent_mapping(em_tree, failed_start,
-                                              failed_len);
+                if (!em)
                         em = ERR_PTR(-EIO);
-                }
         } else if (ret) {
                 free_extent_map(em);
                 em = ERR_PTR(ret);