scsi: hisi_sas: fix some small bugs related to parameters of scsi_shot and scsi_host_template

For v1/v3 hw, need to fill shost->can_queue with max_command_entries-96. And
also in scsi layer, it will assign sht->can_queue to shost->can_queue, which
will be covered by shost->can_queue in hisi_sas_probe() or hisi_sas_v3_probe(),
so it is no need to assign sht->can_queue in scsi_host_template.

Fixes: 7cca9a0fa469 ("scsi: hisi_sas: Use block layer tag instead of IPTT
defined in LLDD")
Signed-off-by: NXiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: NJohn Garry <john.garry@huawei.com>

drivers/scsi/hisi_sas/hisi_sas_main.c

@@ -2356,8 +2356,15 @@ int hisi_sas_probe(struct platform_device *pdev,
 	shost->max_channel = 1;
 	shost->max_cmd_len = 16;
 	shost->sg_tablesize = min_t(u16, SG_ALL, HISI_SAS_SGE_PAGE_CNT);
-	shost->can_queue = hisi_hba->hw->max_command_entries;
-	shost->cmd_per_lun = hisi_hba->hw->max_command_entries;
+	if (hisi_hba->hw->slot_index_alloc) {
+		shost->can_queue = hisi_hba->hw->max_command_entries;
+		shost->cmd_per_lun = hisi_hba->hw->max_command_entries;
+	} else {
+		shost->can_queue = hisi_hba->hw->max_command_entries -
+			HISI_SAS_RESERVED_IPTT_CNT;
+		shost->cmd_per_lun = hisi_hba->hw->max_command_entries -
+			HISI_SAS_RESERVED_IPTT_CNT;
+	}
 
 	sha->sas_ha_name = DRV_NAME;
 	sha->dev = hisi_hba->dev;

drivers/scsi/hisi_sas/hisi_sas_v1_hw.c

@@ -1807,7 +1807,6 @@ static struct scsi_host_template sht_v1_hw = {
 	.scan_start		= hisi_sas_scan_start,
 	.change_queue_depth	= sas_change_queue_depth,
 	.bios_param		= sas_bios_param,
-	.can_queue		= 1,
 	.this_id		= -1,
 	.sg_tablesize		= SG_ALL,
 	.max_sectors		= SCSI_DEFAULT_MAX_SECTORS,

drivers/scsi/hisi_sas/hisi_sas_v2_hw.c

@@ -3560,7 +3560,6 @@ static struct scsi_host_template sht_v2_hw = {
 	.scan_start		= hisi_sas_scan_start,
 	.change_queue_depth	= sas_change_queue_depth,
 	.bios_param		= sas_bios_param,
-	.can_queue		= 1,
 	.this_id		= -1,
 	.sg_tablesize		= SG_ALL,
 	.max_sectors		= SCSI_DEFAULT_MAX_SECTORS,

drivers/scsi/hisi_sas/hisi_sas_v3_hw.c

@@ -2135,7 +2135,6 @@ static struct scsi_host_template sht_v3_hw = {
 	.scan_start		= hisi_sas_scan_start,
 	.change_queue_depth	= sas_change_queue_depth,
 	.bios_param		= sas_bios_param,
-	.can_queue		= 1,
 	.this_id		= -1,
 	.sg_tablesize		= SG_ALL,
 	.max_sectors		= SCSI_DEFAULT_MAX_SECTORS,
@@ -2286,7 +2285,8 @@ hisi_sas_v3_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	shost->sg_tablesize = min_t(u16, SG_ALL, HISI_SAS_SGE_PAGE_CNT);
 	shost->can_queue = hisi_hba->hw->max_command_entries -
 		HISI_SAS_RESERVED_IPTT_CNT;
-	shost->cmd_per_lun = hisi_hba->hw->max_command_entries;
+	shost->cmd_per_lun = hisi_hba->hw->max_command_entries -
+		HISI_SAS_RESERVED_IPTT_CNT;
 
 	sha->sas_ha_name = DRV_NAME;
 	sha->dev = dev;