scsi: hisi_sas: Code cleanup and minor bug fixes

The patch does some code cleanup and fixes some small bugs:

- Correct return status of phy_up_v3_hw() and phy_bcast_v3_hw()
- Add static for function phy_get_max_linkrate_v3_hw()
- Change exception return status when no reset method
- Change magic value to ts->stat in slot_complete_vx_hw()
- Remove unnecessary check for dev_is_sata()
- Fix some issues of alignment and indents (Authored by Xiaofei Tan in
  another patch, but added here to be practical)
Signed-off-by: Xiaofei Tan <tanxiaofei@huawei.com>
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/hisi_sas/hisi_sas_main.c

@@ -33,7 +33,7 @@ u8 hisi_sas_get_ata_protocol(struct host_to_dev_fis *fis, int direction)
 	case ATA_CMD_FPDMA_RECV:
 	case ATA_CMD_FPDMA_SEND:
 	case ATA_CMD_NCQ_NON_DATA:
-	return HISI_SAS_SATA_PROTOCOL_FPDMA;
+		return HISI_SAS_SATA_PROTOCOL_FPDMA;
 
 	case ATA_CMD_DOWNLOAD_MICRO:
 	case ATA_CMD_ID_ATA:
@@ -45,7 +45,7 @@ u8 hisi_sas_get_ata_protocol(struct host_to_dev_fis *fis, int direction)
 	case ATA_CMD_WRITE_LOG_EXT:
 	case ATA_CMD_PIO_WRITE:
 	case ATA_CMD_PIO_WRITE_EXT:
-	return HISI_SAS_SATA_PROTOCOL_PIO;
+		return HISI_SAS_SATA_PROTOCOL_PIO;
 
 	case ATA_CMD_DSM:
 	case ATA_CMD_DOWNLOAD_MICRO_DMA:
@@ -64,7 +64,7 @@ u8 hisi_sas_get_ata_protocol(struct host_to_dev_fis *fis, int direction)
 	case ATA_CMD_WRITE_LOG_DMA_EXT:
 	case ATA_CMD_WRITE_STREAM_DMA_EXT:
 	case ATA_CMD_ZAC_MGMT_IN:
-	return HISI_SAS_SATA_PROTOCOL_DMA;
+		return HISI_SAS_SATA_PROTOCOL_DMA;
 
 	case ATA_CMD_CHK_POWER:
 	case ATA_CMD_DEV_RESET:
@@ -77,21 +77,21 @@ u8 hisi_sas_get_ata_protocol(struct host_to_dev_fis *fis, int direction)
 	case ATA_CMD_STANDBY:
 	case ATA_CMD_STANDBYNOW1:
 	case ATA_CMD_ZAC_MGMT_OUT:
-	return HISI_SAS_SATA_PROTOCOL_NONDATA;
+		return HISI_SAS_SATA_PROTOCOL_NONDATA;
 	default:
 	{
 		if (fis->command == ATA_CMD_SET_MAX) {
 			switch (fis->features) {
 			case ATA_SET_MAX_PASSWD:
 			case ATA_SET_MAX_LOCK:
-			return HISI_SAS_SATA_PROTOCOL_PIO;
+				return HISI_SAS_SATA_PROTOCOL_PIO;
 
 			case ATA_SET_MAX_PASSWD_DMA:
 			case ATA_SET_MAX_UNLOCK_DMA:
-			return HISI_SAS_SATA_PROTOCOL_DMA;
+				return HISI_SAS_SATA_PROTOCOL_DMA;
 
 			default:
-			return HISI_SAS_SATA_PROTOCOL_NONDATA;
+				return HISI_SAS_SATA_PROTOCOL_NONDATA;
 			}
 		}
 		if (direction == DMA_NONE)

drivers/scsi/hisi_sas/hisi_sas_v1_hw.c

@@ -651,8 +651,10 @@ static int reset_hw_v1_hw(struct hisi_hba *hisi_hba)
 			dev_err(dev, "De-reset failed\n");
 			return -EIO;
 		}
-	} else
+	} else {
 		dev_warn(dev, "no reset method\n");
+		return -EINVAL;
+	}
 
 	return 0;
 }

drivers/scsi/hisi_sas/hisi_sas_v2_hw.c

@@ -1095,8 +1095,10 @@ static int reset_hw_v2_hw(struct hisi_hba *hisi_hba)
 			dev_err(dev, "SAS de-reset fail.\n");
 			return -EIO;
 		}
-	} else
-		dev_warn(dev, "no reset method\n");
+	} else {
+		dev_err(dev, "no reset method\n");
+		return -EINVAL;
+	}
 
 	return 0;
 }
@@ -2408,7 +2410,7 @@ slot_complete_v2_hw(struct hisi_hba *hisi_hba, struct hisi_sas_slot *slot)
 		spin_lock_irqsave(&hisi_hba->lock, flags);
 		hisi_sas_slot_task_free(hisi_hba, task, slot);
 		spin_unlock_irqrestore(&hisi_hba->lock, flags);
-		return -1;
+		return ts->stat;
 	}
 
 	if (unlikely(!sas_dev)) {
@@ -2667,7 +2669,7 @@ static int prep_abort_v2_hw(struct hisi_hba *hisi_hba,
 	/* dw0 */
 	hdr->dw0 = cpu_to_le32((5 << CMD_HDR_CMD_OFF) | /*abort*/
 			       (port->id << CMD_HDR_PORT_OFF) |
-			       ((dev_is_sata(dev) ? 1:0) <<
+			       (dev_is_sata(dev) <<
 				CMD_HDR_ABORT_DEVICE_TYPE_OFF) |
 			       (abort_flag << CMD_HDR_ABORT_FLAG_OFF));
 

drivers/scsi/hisi_sas/hisi_sas_v3_hw.c

@@ -670,8 +670,10 @@ static int reset_hw_v3_hw(struct hisi_hba *hisi_hba)
 			dev_err(dev, "Reset failed\n");
 			return -EIO;
 		}
-	} else
+	} else {
 		dev_err(dev, "no reset method!\n");
+		return -EINVAL;
+	}
 
 	return 0;
 }
@@ -731,7 +733,7 @@ static void phy_hard_reset_v3_hw(struct hisi_hba *hisi_hba, int phy_no)
 	start_phy_v3_hw(hisi_hba, phy_no);
 }
 
-enum sas_linkrate phy_get_max_linkrate_v3_hw(void)
+static enum sas_linkrate phy_get_max_linkrate_v3_hw(void)
 {
 	return SAS_LINK_RATE_12_0_GBPS;
 }
@@ -1096,7 +1098,7 @@ static int prep_abort_v3_hw(struct hisi_hba *hisi_hba,
 	/* dw0 */
 	hdr->dw0 = cpu_to_le32((5 << CMD_HDR_CMD_OFF) | /*abort*/
 			       (port->id << CMD_HDR_PORT_OFF) |
-				   ((dev_is_sata(dev) ? 1:0)
+				   (dev_is_sata(dev)
 					<< CMD_HDR_ABORT_DEVICE_TYPE_OFF) |
 					(abort_flag
 					 << CMD_HDR_ABORT_FLAG_OFF));
@@ -1112,9 +1114,9 @@ static int prep_abort_v3_hw(struct hisi_hba *hisi_hba,
 	return 0;
 }
 
-static int phy_up_v3_hw(int phy_no, struct hisi_hba *hisi_hba)
+static irqreturn_t phy_up_v3_hw(int phy_no, struct hisi_hba *hisi_hba)
 {
-	int i, res = 0;
+	int i, res;
 	u32 context, port_id, link_rate;
 	struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 	struct asd_sas_phy *sas_phy = &phy->sas_phy;
@@ -1186,7 +1188,7 @@ static int phy_up_v3_hw(int phy_no, struct hisi_hba *hisi_hba)
 	phy->port_id = port_id;
 	phy->phy_attached = 1;
 	hisi_sas_notify_phy_event(phy, HISI_PHYE_PHY_UP);
-
+	res = IRQ_HANDLED;
 end:
 	hisi_sas_phy_write32(hisi_hba, phy_no, CHL_INT0,
 			     CHL_INT0_SL_PHY_ENABLE_MSK);
@@ -1195,7 +1197,7 @@ static int phy_up_v3_hw(int phy_no, struct hisi_hba *hisi_hba)
 	return res;
 }
 
-static int phy_down_v3_hw(int phy_no, struct hisi_hba *hisi_hba)
+static irqreturn_t phy_down_v3_hw(int phy_no, struct hisi_hba *hisi_hba)
 {
 	u32 phy_state, sl_ctrl, txid_auto;
 	struct device *dev = hisi_hba->dev;
@@ -1217,10 +1219,10 @@ static int phy_down_v3_hw(int phy_no, struct hisi_hba *hisi_hba)
 	hisi_sas_phy_write32(hisi_hba, phy_no, CHL_INT0, CHL_INT0_NOT_RDY_MSK);
 	hisi_sas_phy_write32(hisi_hba, phy_no, PHYCTRL_NOT_RDY_MSK, 0);
 
-	return 0;
+	return IRQ_HANDLED;
 }
 
-static void phy_bcast_v3_hw(int phy_no, struct hisi_hba *hisi_hba)
+static irqreturn_t phy_bcast_v3_hw(int phy_no, struct hisi_hba *hisi_hba)
 {
 	struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
 	struct asd_sas_phy *sas_phy = &phy->sas_phy;
@@ -1231,6 +1233,8 @@ static void phy_bcast_v3_hw(int phy_no, struct hisi_hba *hisi_hba)
 	hisi_sas_phy_write32(hisi_hba, phy_no, CHL_INT0,
 			     CHL_INT0_SL_RX_BCST_ACK_MSK);
 	hisi_sas_phy_write32(hisi_hba, phy_no, SL_RX_BCAST_CHK_MSK, 0);
+
+	return IRQ_HANDLED;
 }
 
 static irqreturn_t int_phy_up_down_bcast_v3_hw(int irq_no, void *p)
@@ -1257,7 +1261,9 @@ static irqreturn_t int_phy_up_down_bcast_v3_hw(int irq_no, void *p)
 						res = IRQ_HANDLED;
 				if (irq_value & CHL_INT0_SL_RX_BCST_ACK_MSK)
 					/* phy bcast */
-					phy_bcast_v3_hw(phy_no, hisi_hba);
+					if (phy_bcast_v3_hw(phy_no, hisi_hba)
+							== IRQ_HANDLED)
+						res = IRQ_HANDLED;
 			} else {
 				if (irq_value & CHL_INT0_NOT_RDY_MSK)
 					/* phy down */
@@ -1573,7 +1579,7 @@ slot_complete_v3_hw(struct hisi_hba *hisi_hba, struct hisi_sas_slot *slot)
 		spin_lock_irqsave(&hisi_hba->lock, flags);
 		hisi_sas_slot_task_free(hisi_hba, task, slot);
 		spin_unlock_irqrestore(&hisi_hba->lock, flags);
-		return -1;
+		return ts->stat;
 	}
 
 	if (unlikely(!sas_dev)) {