btrfs: btrfs_iget never returns an is_bad_inode inode

Just get rid of pointless checks.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/free-space-cache.c

@@ -71,10 +71,6 @@ static struct inode *__lookup_free_space_inode(struct btrfs_root *root,
 	inode = btrfs_iget(fs_info->sb, &location, root, NULL);
 	if (IS_ERR(inode))
 		return inode;
-	if (is_bad_inode(inode)) {
-		iput(inode);
-		return ERR_PTR(-ENOENT);
-	}
 
 	mapping_set_gfp_mask(inode->i_mapping,
 			mapping_gfp_constraint(inode->i_mapping,

fs/btrfs/relocation.c

@@ -3470,11 +3470,8 @@ static int delete_block_group_cache(struct btrfs_fs_info *fs_info,
 	key.offset = 0;
 
 	inode = btrfs_iget(fs_info->sb, &key, root, NULL);
-	if (IS_ERR(inode) || is_bad_inode(inode)) {
-		if (!IS_ERR(inode))
-			iput(inode);
+	if (IS_ERR(inode))
 		return -ENOENT;
-	}
 
 truncate:
 	ret = btrfs_check_trunc_cache_free_space(fs_info,
@@ -4155,7 +4152,7 @@ struct inode *create_reloc_inode(struct btrfs_fs_info *fs_info,
 	key.type = BTRFS_INODE_ITEM_KEY;
 	key.offset = 0;
 	inode = btrfs_iget(fs_info->sb, &key, root, NULL);
-	BUG_ON(IS_ERR(inode) || is_bad_inode(inode));
+	BUG_ON(IS_ERR(inode));
 	BTRFS_I(inode)->index_cnt = group->key.objectid;
 
 	err = btrfs_orphan_add(trans, BTRFS_I(inode));

fs/btrfs/tree-log.c

@@ -545,12 +545,8 @@ static noinline struct inode *read_one_inode(struct btrfs_root *root,
 	key.type = BTRFS_INODE_ITEM_KEY;
 	key.offset = 0;
 	inode = btrfs_iget(root->fs_info->sb, &key, root, NULL);
-	if (IS_ERR(inode)) {
+	if (IS_ERR(inode))
 		inode = NULL;
-	} else if (is_bad_inode(inode)) {
-		iput(inode);
-		inode = NULL;
-	}
 	return inode;
 }