Btrfs: don't call free_extent_buffer twice in iterate_irefs
Avoid calling free_extent_buffer more than once when the iterator function
returns non-zero. The only code that uses this is scrub repair for corrupted
nodatasum blocks.
Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index b332ff0..fb56bcc 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -1247,7 +1247,7 @@
struct btrfs_path *path,
iterate_irefs_t *iterate, void *ctx)
{
- int ret;
+ int ret = 0;
int slot;
u32 cur;
u32 len;
@@ -1259,7 +1259,7 @@
struct btrfs_inode_ref *iref;
struct btrfs_key found_key;
- while (1) {
+ while (!ret) {
ret = inode_ref_info(inum, parent ? parent+1 : 0, fs_root, path,
&found_key);
if (ret < 0)
@@ -1288,10 +1288,8 @@
(unsigned long long)found_key.objectid,
(unsigned long long)fs_root->objectid);
ret = iterate(parent, iref, eb, ctx);
- if (ret) {
- free_extent_buffer(eb);
+ if (ret)
break;
- }
len = sizeof(*iref) + name_len;
iref = (struct btrfs_inode_ref *)((char *)iref + len);
}