scsi: advansys: Use scsi_cmd_to_rq() instead of scsi_cmnd.request

Prepare for removal of the request pointer by using scsi_cmd_to_rq()
instead. This patch does not change any functionality.

Link: https://lore.kernel.org/r/20210809230355.8186-15-bvanassche@acm.orgSigned-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/advansys.c

@@ -7423,7 +7423,7 @@ static int asc_build_req(struct asc_board *boardp, struct scsi_cmnd *scp,
 	 * Set the srb_tag to the command tag + 1, as
 	 * srb_tag '0' is used internally by the chip.
 	 */
-	srb_tag = scp->request->tag + 1;
+	srb_tag = scsi_cmd_to_rq(scp)->tag + 1;
 	asc_scsi_q->q2.srb_tag = srb_tag;
 
 	/*
@@ -7637,7 +7637,7 @@ static int
 adv_build_req(struct asc_board *boardp, struct scsi_cmnd *scp,
 	      adv_req_t **adv_reqpp)
 {
-	u32 srb_tag = scp->request->tag;
+	u32 srb_tag = scsi_cmd_to_rq(scp)->tag;
 	adv_req_t *reqp;
 	ADV_SCSI_REQ_Q *scsiqp;
 	int ret;