configfs: simplify the configfs_dirent_is_ready

mainline inclusion
from mainline-v5.15-rc1
commit 899587c8
category: bugfix
bugzilla: 187567, https://gitee.com/openeuler/kernel/issues/I5PK1G
CVE: NA

--------------------------------

Return the error directly instead of using a goto.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NZhihao Cheng <chengzhihao1@huawei.com>
Reviewed-by: NZhang Yi <yi.zhang@huawei.com>
Signed-off-by: NYongqiang Liu <liuyongqiang13@huawei.com>

fs/configfs/dir.c

@@ -494,9 +494,8 @@ static struct dentry * configfs_lookup(struct inode *dir,
 	 * not complete their initialization, since the dentries of the
 	 * attributes won't be instantiated.
 	 */
-	err = -ENOENT;
 	if (!configfs_dirent_is_ready(parent_sd))
-		goto out;
+		return ERR_PTR(-ENOENT);
 
 	list_for_each_entry(sd, &parent_sd->s_children, s_sibling) {
 		if (sd->s_type & CONFIGFS_NOT_PINNED) {
@@ -520,7 +519,6 @@ static struct dentry * configfs_lookup(struct inode *dir,
 		return NULL;
 	}
 
-out:
 	return ERR_PTR(err);
 }