Btrfs: use dget_parent where we can UPDATED

[mirror_ubuntu-hirsute-kernel.git] / fs / btrfs / transaction.c

diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 1fffbc017bdfe0451cc2e67ccf5fd85623a12aee..f50e931fc217b978b0bcf1fb54f0d661d3b53562 100644 (file)
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -902,6 +902,7 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
        struct btrfs_root *root = pending->root;
        struct btrfs_root *parent_root;
        struct inode *parent_inode;
+       struct dentry *parent;
        struct dentry *dentry;
        struct extent_buffer *tmp;
        struct extent_buffer *old;
@@ -941,7 +942,8 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
        trans->block_rsv = &pending->block_rsv;
 
        dentry = pending->dentry;
-       parent_inode = dentry->d_parent->d_inode;
+       parent = dget_parent(dentry);
+       parent_inode = parent->d_inode;
        parent_root = BTRFS_I(parent_inode)->root;
        record_root_in_trans(trans, parent_root);
 
@@ -989,6 +991,7 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
                                 parent_inode->i_ino, index,
                                 dentry->d_name.name, dentry->d_name.len);
        BUG_ON(ret);
+       dput(parent);
 
        key.offset = (u64)-1;
        pending->snap = btrfs_read_fs_root_no_name(root->fs_info, &key);