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authorChristoph Hellwig <hch@lst.de>2016-07-19 11:31:53 +0200
committerJens Axboe <axboe@fb.com>2016-07-21 01:38:35 +0200
commit4613c5f1df92f3cb5a8f89c7dfefc37402c16bd8 (patch)
treee31b141cd7540e79c4d0bc199f5a4a71db261b69 /drivers/scsi/osd
parenttarget: stop using blk_make_request (diff)
downloadlinux-4613c5f1df92f3cb5a8f89c7dfefc37402c16bd8.tar.xz
linux-4613c5f1df92f3cb5a8f89c7dfefc37402c16bd8.zip
scsi/osd: open code blk_make_request
I wish the OSD code could simply use blk_rq_map_* helpers like everyone else, but the complex nature of deciding if we have DATA IN and/or DATA OUT buffers might make this impossible (at least for a mere human like me). But using blk_rq_append_bio at least allows sharing the setup code between request with or without dat a buffers, and given that this is the last user of blk_make_request it allows getting rid of that somewhat awkward interface. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Boaz Harrosh <ooo@electrozaur.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/scsi/osd')
-rw-r--r--drivers/scsi/osd/osd_initiator.c25
1 files changed, 16 insertions, 9 deletions
diff --git a/drivers/scsi/osd/osd_initiator.c b/drivers/scsi/osd/osd_initiator.c
index daa4dc17f172..2f2a9910e30e 100644
--- a/drivers/scsi/osd/osd_initiator.c
+++ b/drivers/scsi/osd/osd_initiator.c
@@ -1558,18 +1558,25 @@ static int _osd_req_finalize_data_integrity(struct osd_request *or,
static struct request *_make_request(struct request_queue *q, bool has_write,
struct _osd_io_info *oii, gfp_t flags)
{
- if (oii->bio)
- return blk_make_request(q, oii->bio, flags);
- else {
- struct request *req;
-
- req = blk_get_request(q, has_write ? WRITE : READ, flags);
- if (IS_ERR(req))
- return req;
+ struct request *req;
+ struct bio *bio = oii->bio;
+ int ret;
- blk_rq_set_block_pc(req);
+ req = blk_get_request(q, has_write ? WRITE : READ, flags);
+ if (IS_ERR(req))
return req;
+ blk_rq_set_block_pc(req);
+
+ for_each_bio(bio) {
+ struct bio *bounce_bio = bio;
+
+ blk_queue_bounce(req->q, &bounce_bio);
+ ret = blk_rq_append_bio(req, bounce_bio);
+ if (ret)
+ return ERR_PTR(ret);
}
+
+ return req;
}
static int _init_blk_request(struct osd_request *or,