diff options
| author | Christoph Hellwig <hch@lst.de> | 2017-01-27 09:46:29 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2017-01-27 15:08:35 -0700 |
| commit | 82ed4db499b8598f16f8871261bff088d6b0597f (patch) | |
| tree | e1cc0a433bf5ae2b9723837291617bdfeeb61816 /block/bsg-lib.c | |
| parent | 8ae94eb65be9425af4d57a4f4cfebfdf03081e93 (diff) | |
block: split scsi_request out of struct request
And require all drivers that want to support BLOCK_PC to allocate it
as the first thing of their private data. To support this the legacy
IDE and BSG code is switched to set cmd_size on their queues to let
the block layer allocate the additional space.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/bsg-lib.c')
| -rw-r--r-- | block/bsg-lib.c | 34 |
1 files changed, 23 insertions, 11 deletions
diff --git a/block/bsg-lib.c b/block/bsg-lib.c index c74acf426840..cd15f9dbb147 100644 --- a/block/bsg-lib.c +++ b/block/bsg-lib.c @@ -71,22 +71,24 @@ void bsg_job_done(struct bsg_job *job, int result, { struct request *req = job->req; struct request *rsp = req->next_rq; + struct scsi_request *rq = scsi_req(req); int err; err = job->req->errors = result; if (err < 0) /* we're only returning the result field in the reply */ - job->req->sense_len = sizeof(u32); + rq->sense_len = sizeof(u32); else - job->req->sense_len = job->reply_len; + rq->sense_len = job->reply_len; /* we assume all request payload was transferred, residual == 0 */ - req->resid_len = 0; + rq->resid_len = 0; if (rsp) { - WARN_ON(reply_payload_rcv_len > rsp->resid_len); + WARN_ON(reply_payload_rcv_len > scsi_req(rsp)->resid_len); /* set reply (bidi) residual */ - rsp->resid_len -= min(reply_payload_rcv_len, rsp->resid_len); + scsi_req(rsp)->resid_len -= + min(reply_payload_rcv_len, scsi_req(rsp)->resid_len); } blk_complete_request(req); } @@ -113,6 +115,7 @@ static int bsg_map_buffer(struct bsg_buffer *buf, struct request *req) if (!buf->sg_list) return -ENOMEM; sg_init_table(buf->sg_list, req->nr_phys_segments); + scsi_req(req)->resid_len = blk_rq_bytes(req); buf->sg_cnt = blk_rq_map_sg(req->q, req, buf->sg_list); buf->payload_len = blk_rq_bytes(req); return 0; @@ -127,6 +130,7 @@ static int bsg_create_job(struct device *dev, struct request *req) { struct request *rsp = req->next_rq; struct request_queue *q = req->q; + struct scsi_request *rq = scsi_req(req); struct bsg_job *job; int ret; @@ -140,9 +144,9 @@ static int bsg_create_job(struct device *dev, struct request *req) job->req = req; if (q->bsg_job_size) job->dd_data = (void *)&job[1]; - job->request = req->cmd; - job->request_len = req->cmd_len; - job->reply = req->sense; + job->request = rq->cmd; + job->request_len = rq->cmd_len; + job->reply = rq->sense; job->reply_len = SCSI_SENSE_BUFFERSIZE; /* Size of sense buffer * allocated */ if (req->bio) { @@ -228,9 +232,15 @@ struct request_queue *bsg_setup_queue(struct device *dev, char *name, struct request_queue *q; int ret; - q = blk_init_queue(bsg_request_fn, NULL); + q = blk_alloc_queue(GFP_KERNEL); if (!q) return ERR_PTR(-ENOMEM); + q->cmd_size = sizeof(struct scsi_request); + q->request_fn = bsg_request_fn; + + ret = blk_init_allocated_queue(q); + if (ret) + goto out_cleanup_queue; q->queuedata = dev; q->bsg_job_size = dd_job_size; @@ -243,10 +253,12 @@ struct request_queue *bsg_setup_queue(struct device *dev, char *name, if (ret) { printk(KERN_ERR "%s: bsg interface failed to " "initialize - register queue\n", dev->kobj.name); - blk_cleanup_queue(q); - return ERR_PTR(ret); + goto out_cleanup_queue; } return q; +out_cleanup_queue: + blk_cleanup_queue(q); + return ERR_PTR(ret); } EXPORT_SYMBOL_GPL(bsg_setup_queue); |