gfs2: gfs2_create_inode error handling fix

BugLink: https://bugs.launchpad.net/bugs/2119603

[ Upstream commit af4044fd0b77e915736527dd83011e46e6415f01 ]

When gfs2_create_inode() finds a directory, make sure to return -EISDIR.

Fixes: 571a4b5 ("GFS2: bugger off early if O_CREAT open finds a directory")
Signed-off-by: Andreas Gruenbacher <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
Signed-off-by: Manuel Diewald <[email protected]>
Signed-off-by: Mehmet Basaran <[email protected]>

Author: Andreas Gruenbacher

fs/gfs2/inode.c

@@ -659,7 +659,8 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
 	if (!IS_ERR(inode)) {
 		if (S_ISDIR(inode->i_mode)) {
 			iput(inode);
-			inode = ERR_PTR(-EISDIR);
+			inode = NULL;
+			error = -EISDIR;
 			goto fail_gunlock;
 		}
 		d_instantiate(dentry, inode);