scsi: tcm_loop: 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/20210809230355.8186-51-bvanassche@acm.orgSigned-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/target/loopback/tcm_loop.c

@@ -183,7 +183,7 @@ static int tcm_loop_queuecommand(struct Scsi_Host *sh, struct scsi_cmnd *sc)
 
 	memset(tl_cmd, 0, sizeof(*tl_cmd));
 	tl_cmd->sc = sc;
-	tl_cmd->sc_cmd_tag = sc->request->tag;
+	tl_cmd->sc_cmd_tag = scsi_cmd_to_rq(sc)->tag;
 
 	tcm_loop_target_queue_cmd(tl_cmd);
 	return 0;
@@ -249,7 +249,7 @@ static int tcm_loop_abort_task(struct scsi_cmnd *sc)
 	tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host);
 	tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id];
 	ret = tcm_loop_issue_tmr(tl_tpg, sc->device->lun,
-				 sc->request->tag, TMR_ABORT_TASK);
+				 scsi_cmd_to_rq(sc)->tag, TMR_ABORT_TASK);
 	return (ret == TMR_FUNCTION_COMPLETE) ? SUCCESS : FAILED;
 }