scsi: qla2xxx: Stop using the SCSI pointer

Instead of using the SCp.ptr field to track whether or not a command is
in flight, use the sp->type field to track this information. sp->type
must be set for proper operation of the qla2xxx driver. See e.g. the
switch (sp->type) statement in qla2x00_ct_entry().

This patch prepares for removal of the SCSI pointer from struct scsi_cmnd.

Link: https://lore.kernel.org/r/20220218195117.25689-43-bvanassche@acm.org
Cc: Nilesh Javali <njavali@marvell.com>
Cc: Ewan D. Milne <emilne@redhat.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qla2xxx/qla_def.h

@@ -5201,8 +5201,6 @@ struct secure_flash_update_block_pk {
 
 #define	QLA_DSDS_PER_IOCB	37
 
-#define CMD_SP(Cmnd)		((Cmnd)->SCp.ptr)
-
 #define QLA_SG_ALL	1024
 
 enum nexus_wait_type {

drivers/scsi/qla2xxx/qla_os.c

@@ -739,7 +739,7 @@ void qla2x00_sp_compl(srb_t *sp, int res)
 	/* kref: INIT */
 	kref_put(&sp->cmd_kref, qla2x00_sp_release);
 	cmd->result = res;
-	CMD_SP(cmd) = NULL;
+	sp->type = 0;
 	scsi_done(cmd);
 	if (comp)
 		complete(comp);
@@ -831,7 +831,7 @@ void qla2xxx_qpair_sp_compl(srb_t *sp, int res)
 	/* ref: INIT */
 	kref_put(&sp->cmd_kref, qla2x00_sp_release);
 	cmd->result = res;
-	CMD_SP(cmd) = NULL;
+	sp->type = 0;
 	scsi_done(cmd);
 	if (comp)
 		complete(comp);
@@ -934,8 +934,6 @@ qla2xxx_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
 
 	sp->u.scmd.cmd = cmd;
 	sp->type = SRB_SCSI_CMD;
-
-	CMD_SP(cmd) = (void *)sp;
 	sp->free = qla2x00_sp_free_dma;
 	sp->done = qla2x00_sp_compl;
 
@@ -1025,7 +1023,6 @@ qla2xxx_mqueuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd,
 
 	sp->u.scmd.cmd = cmd;
 	sp->type = SRB_SCSI_CMD;
-	CMD_SP(cmd) = (void *)sp;
 	sp->free = qla2xxx_qpair_sp_free_dma;
 	sp->done = qla2xxx_qpair_sp_compl;
 
@@ -1071,6 +1068,7 @@ qla2x00_eh_wait_on_command(struct scsi_cmnd *cmd)
 	unsigned long wait_iter = ABORT_WAIT_ITER;
 	scsi_qla_host_t *vha = shost_priv(cmd->device->host);
 	struct qla_hw_data *ha = vha->hw;
+	srb_t *sp = scsi_cmd_priv(cmd);
 	int ret = QLA_SUCCESS;
 
 	if (unlikely(pci_channel_offline(ha->pdev)) || ha->flags.eeh_busy) {
@@ -1079,10 +1077,9 @@ qla2x00_eh_wait_on_command(struct scsi_cmnd *cmd)
 		return ret;
 	}
 
-	while (CMD_SP(cmd) && wait_iter--) {
+	while (sp->type && wait_iter--)
 		msleep(ABORT_POLLING_PERIOD);
-	}
-	if (CMD_SP(cmd))
+	if (sp->type)
 		ret = QLA_FUNCTION_FAILED;
 
 	return ret;