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null_blk: Use blk_init_request_from_bio() instead of open-coding it

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This patch changes the behavior of the null_blk driver for the
LightNVM mode as follows:
* REQ_FAILFAST_MASK is set for read-ahead requests.
* If no I/O priority has been set in the bio, the I/O priority is
  copied from the I/O context.
* The rq_disk member is initialized if bio->bi_bdev != NULL.
* req->errors is initialized to zero.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Matias Bjørling <m@bjorling.me>
Cc: Adam Manzanares <adam.manzanares@wdc.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Bart Van Assche 2017-04-19 14:01:25 -07:00 committed by Jens Axboe
parent da8d7f079b
commit 2644a3ccee
1 changed files with 1 additions and 8 deletions
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9
drivers/block/null_blk.c
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@ -443,14 +443,7 @@ static int null_lnvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
if (IS_ERR(rq))
return -ENOMEM;
rq->__sector = bio->bi_iter.bi_sector;
rq->ioprio = bio_prio(bio);
if (bio_has_data(bio))
rq->nr_phys_segments = bio_phys_segments(q, bio);
rq->__data_len = bio->bi_iter.bi_size;
rq->bio = rq->biotail = bio;
blk_init_request_from_bio(rq, bio);
rq->end_io_data = rqd;