read_tree_block() returns error pointers, and never NULL and so I have
updated the error handling.
Fixes: 74739121b4c7 ("Btrfs: add a extent ref verify tool")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
diff --git a/fs/btrfs/ref-verify.c b/fs/btrfs/ref-verify.c
index f65d78cf3c7e..34878699d363 100644
--- a/fs/btrfs/ref-verify.c
+++ b/fs/btrfs/ref-verify.c
@@ -584,7 +584,9 @@ static int walk_down_tree(struct btrfs_root *root, struct btrfs_path *path,
gen = btrfs_node_ptr_generation(path->nodes[level],
path->slots[level]);
eb = read_tree_block(fs_info, block_bytenr, gen);
- if (!eb || !extent_buffer_uptodate(eb)) {
+ if (IS_ERR(eb))
+ return PTR_ERR(eb);
+ if (!extent_buffer_uptodate(eb)) {
free_extent_buffer(eb);
return -EIO;
}
--
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