gfs2_atomic_open(): simplify the use of finish_no_open()

In ->atomic_open(inode, dentry, file, opened) calling finish_no_open(file, NULL)
is equivalent to dget(dentry); return finish_no_open(file, dentry);

No need to open-code that...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/gfs2/inode.c

@@ -1249,11 +1249,8 @@ static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry,
 	if (d != NULL)
 		dentry = d;
 	if (dentry->d_inode) {
-		if (!(*opened & FILE_OPENED)) {
-			if (d == NULL)
-				dget(dentry);
-			return finish_no_open(file, dentry);
-		}
+		if (!(*opened & FILE_OPENED))
+			return finish_no_open(file, d);
 		dput(d);
 		return 0;
 	}