Btrfs: refactor error handling to drop inode in btrfs_create()

Refactor it by checking whether the inode has been created and needs to be
dropped (drop_inode_on_err) and also if the err variable is set. That way the
variable doesn't need to be set on each and every error handling block.

Signed-off-by: Filipe Brandenburger <filbranden@google.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index adab791e1ce9d2b2edc03efd47b670e5e67b0980..657f16d9c78b38ba6a425ec0a3e53dc591dd5ec9 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -4989,7 +4989,7 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry,
        struct btrfs_trans_handle *trans;
        struct btrfs_root *root = BTRFS_I(dir)->root;
        struct inode *inode = NULL;
-       int drop_inode = 0;
+       int drop_inode_on_err = 0;
        int err;
        u64 objectid;
        u64 index = 0;
@@ -5014,12 +5014,11 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry,
                err = PTR_ERR(inode);
                goto out_unlock;
        }
+       drop_inode_on_err = 1;
 
        err = btrfs_init_inode_security(trans, inode, dir, &dentry->d_name);
-       if (err) {
-               drop_inode = 1;
+       if (err)
                goto out_unlock;
-       }
 
        /*
        * If the active LSM wants to access the inode during
@@ -5032,16 +5031,16 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry,
 
        err = btrfs_add_nondir(trans, dir, dentry, inode, 0, index);
        if (err)
-               drop_inode = 1;
-       else {
-               inode->i_mapping->a_ops = &btrfs_aops;
-               inode->i_mapping->backing_dev_info = &root->fs_info->bdi;
-               BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops;
-               d_instantiate(dentry, inode);
-       }
+               goto out_unlock;
+
+       inode->i_mapping->a_ops = &btrfs_aops;
+       inode->i_mapping->backing_dev_info = &root->fs_info->bdi;
+       BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops;
+       d_instantiate(dentry, inode);
+
 out_unlock:
        btrfs_end_transaction(trans, root);
-       if (drop_inode) {
+       if (err && drop_inode_on_err) {
                inode_dec_link_count(inode);
                iput(inode);
        }