move more stuff down into bio_copy_user_iov()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

block/bio.c

@@ -1289,6 +1289,9 @@ struct bio *bio_copy_user_iov(struct request_queue *q,
 	if (ret)
 		goto cleanup;
 
+	if (map_data)
+		map_data->offset += bio->bi_iter.bi_size;
+
 	/*
 	 * success
 	 */
@@ -1301,6 +1304,8 @@ struct bio *bio_copy_user_iov(struct request_queue *q,
 	iov_iter_advance(iter, bio->bi_iter.bi_size);
 
 	bio->bi_private = bmd;
+	if (map_data && map_data->null_mapped)
+		bio_set_flag(bio, BIO_NULL_MAPPED);
 	return bio;
 cleanup:
 	if (!map_data)

block/blk-map.c

@@ -66,12 +66,6 @@ static int __blk_rq_map_user_iov(struct request *rq,
 	bio->bi_opf &= ~REQ_OP_MASK;
 	bio->bi_opf |= req_op(rq);
 
-	if (map_data && map_data->null_mapped)
-		bio_set_flag(bio, BIO_NULL_MAPPED);
-
-	if (map_data)
-		map_data->offset += bio->bi_iter.bi_size;
-
 	orig_bio = bio;
 
 	/*