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Commit 07359fc6 authored by FUJITA Tomonori's avatar FUJITA Tomonori Committed by Jens Axboe
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block: add bounce support to blk_rq_map_user_iov 



blk_rq_map_user_iov can't handle the bounce buffer (it means that the
bio_map_user_iov path doesn't work with a LLD that needs GFP_DMA).

This patch fixes blk_rq_map_user_iov to support the bounce buffer.

Signed-off-by: default avatarFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
parent c265a7f4

block/blk-map.c

+1 −0
Original line number Diff line number Diff line
@@ -210,6 +210,7 @@ int blk_rq_map_user_iov(struct request_queue *q, struct request *rq, 
	if (!bio_flagged(bio, BIO_USER_MAPPED))

		rq->cmd_flags |= REQ_COPY_USER;



	blk_queue_bounce(q, &bio);

	bio_get(bio);

	blk_rq_bio_prep(q, rq, bio);

	rq->buffer = rq->data = NULL;