f2fs: clean up error path in f2fs_readdir

No logic changes, just clean up the error path.
Signed-off-by: NChao Yu <chao2.yu@samsung.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/dir.c

@@ -867,16 +867,13 @@ static int f2fs_readdir(struct file *file, struct dir_context *ctx)
 
 		make_dentry_ptr(inode, &d, (void *)dentry_blk, 1);
 
-		if (f2fs_fill_dentries(ctx, &d, n * NR_DENTRY_IN_BLOCK, &fstr))
-			goto stop;
-
-		ctx->pos = (n + 1) * NR_DENTRY_IN_BLOCK;
+		if (f2fs_fill_dentries(ctx, &d, n * NR_DENTRY_IN_BLOCK, &fstr)) {
 			kunmap(dentry_page);
 			f2fs_put_page(dentry_page, 1);
-		dentry_page = NULL;
+			break;
 		}
-stop:
-	if (dentry_page && !IS_ERR(dentry_page)) {
+
+		ctx->pos = (n + 1) * NR_DENTRY_IN_BLOCK;
 		kunmap(dentry_page);
 		f2fs_put_page(dentry_page, 1);
 	}