fs/ntfs3: Remove impossible fault condition in fill_super

mainline inclusion
from mainline-v5.15
commit 5d7d6b16
category: feature
bugzilla:
https://gitee.com/openeuler/kernel/issues/I4G67J?from=project-issue
CVE: NA

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

Remove root drop when we fault out. This can never happened because
when we allocate root we eather fault when no root or success.
Signed-off-by: NKari Argillander <kari.argillander@gmail.com>
Signed-off-by: NKonstantin Komarov <almaz.alexandrovich@paragon-software.com>
Signed-off-by: NYin Xiujiang <yinxiujiang@kylinos.cn>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Acked-by: NHou Tao <houtao1@huawei.com>
Acked-by: NXie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

fs/ntfs3/super.c

@@ -1295,12 +1295,6 @@ static int ntfs_fill_super(struct super_block *sb, struct fs_context *fc)
 
 out:
 	iput(inode);
-
-	if (sb->s_root) {
-		d_drop(sb->s_root);
-		sb->s_root = NULL;
-	}
-
 	return err;
 }