Btrfs: csum_verify_file_block locking fix
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c
index e7510ac..2c98b62 100644
--- a/fs/btrfs/file-item.c
+++ b/fs/btrfs/file-item.c
@@ -110,6 +110,7 @@
file_key.offset = offset;
file_key.flags = 0;
btrfs_set_key_type(&file_key, BTRFS_CSUM_ITEM_KEY);
+ mutex_lock(&root->fs_info->fs_mutex);
ret = btrfs_search_slot(NULL, root, &file_key, path, 0, 0);
if (ret)
goto fail;
@@ -123,6 +124,7 @@
fail:
btrfs_release_path(root, path);
btrfs_free_path(path);
+ mutex_unlock(&root->fs_info->fs_mutex);
return ret;
}