12 static int scsi_bsg_sg_io_fn(struct request_queue *q, struct sg_io_v4 *hdr,  in scsi_bsg_sg_io_fn()  argument
20 	if (hdr->protocol != BSG_PROTOCOL_SCSI  ||  in scsi_bsg_sg_io_fn()
21 	    hdr->subprotocol != BSG_SUB_PROTOCOL_SCSI_CMD)  in scsi_bsg_sg_io_fn()
23 	if (hdr->dout_xfer_len && hdr->din_xfer_len) {  in scsi_bsg_sg_io_fn()
28 	rq = blk_get_request(q, hdr->dout_xfer_len ?  in scsi_bsg_sg_io_fn()
36 	sreq->cmd_len = hdr->request_len;  in scsi_bsg_sg_io_fn()
44 	if (copy_from_user(sreq->cmd, uptr64(hdr->request), sreq->cmd_len))  in scsi_bsg_sg_io_fn()
51 	if (hdr->dout_xfer_len) {  in scsi_bsg_sg_io_fn()
52 		ret = blk_rq_map_user(rq->q, rq, NULL, uptr64(hdr->dout_xferp),  in scsi_bsg_sg_io_fn()
53 				hdr->dout_xfer_len, GFP_KERNEL);  in scsi_bsg_sg_io_fn()
54 	} else if (hdr->din_xfer_len) {  in scsi_bsg_sg_io_fn()
55 		ret = blk_rq_map_user(rq->q, rq, NULL, uptr64(hdr->din_xferp),  in scsi_bsg_sg_io_fn()
56 				hdr->din_xfer_len, GFP_KERNEL);  in scsi_bsg_sg_io_fn()
63 	blk_execute_rq(NULL, rq, !(hdr->flags & BSG_FLAG_Q_AT_TAIL));  in scsi_bsg_sg_io_fn()
68 	hdr->device_status = sreq->result & 0xff;  in scsi_bsg_sg_io_fn()
69 	hdr->transport_status = host_byte(sreq->result);  in scsi_bsg_sg_io_fn()
70 	hdr->driver_status = 0;  in scsi_bsg_sg_io_fn()
72 		hdr->driver_status = DRIVER_SENSE;  in scsi_bsg_sg_io_fn()
73 	hdr->info = 0;  in scsi_bsg_sg_io_fn()
74 	if (hdr->device_status || hdr->transport_status || hdr->driver_status)  in scsi_bsg_sg_io_fn()
75 		hdr->info |= SG_INFO_CHECK;  in scsi_bsg_sg_io_fn()
76 	hdr->response_len = 0;  in scsi_bsg_sg_io_fn()
78 	if (sreq->sense_len && hdr->response) {  in scsi_bsg_sg_io_fn()
79 		int len = min_t(unsigned int, hdr->max_response_len,  in scsi_bsg_sg_io_fn()
82 		if (copy_to_user(uptr64(hdr->response), sreq->sense, len))  in scsi_bsg_sg_io_fn()
85 			hdr->response_len = len;  in scsi_bsg_sg_io_fn()
89 		hdr->din_resid = sreq->resid_len;  in scsi_bsg_sg_io_fn()
91 		hdr->dout_resid = sreq->resid_len;  in scsi_bsg_sg_io_fn()