scsi: libsas: Introduce more SAM status code aliases in enum exec_status

This patch prepares for converting SAM status codes into an enum. Without
this patch converting SAM status codes into an enumeration type would
trigger complaints about enum type mismatches for the SAS code.

Link: https://lore.kernel.org/r/[e-mail]
Cc: Hannes Reinecke <[e-mail]>
Cc: Artur Paszkiewicz <[e-mail]>
Cc: Jason Yan <[e-mail]>
Reviewed-by: John Garry <[e-mail]>
Reviewed-by: Himanshu Madhani <[e-mail]>
Acked-by: Jack Wang <[e-mail]>
Signed-off-by: Bart Van Assche <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/aic94xx/aic94xx_task.c

···
 	switch (opcode) {
 	case TC_NO_ERROR:
 		ts->resp = SAS_TASK_COMPLETE;
-		ts->stat = SAM_STAT_GOOD;
+		ts->stat = SAS_SAM_STAT_GOOD;
 		break;
 	case TC_UNDERRUN:
 		ts->resp = SAS_TASK_COMPLETE;

drivers/scsi/hisi_sas/hisi_sas_v1_hw.c

···
 		}
 		default:
 		{
-			ts->stat = SAM_STAT_CHECK_CONDITION;
+			ts->stat = SAS_SAM_STAT_CHECK_CONDITION;
 			break;
 		}
 		}
 	}
 		break;
 	case SAS_PROTOCOL_SMP:
-		ts->stat = SAM_STAT_CHECK_CONDITION;
+		ts->stat = SAS_SAM_STAT_CHECK_CONDITION;
 		break;
 
 	case SAS_PROTOCOL_SATA:
···
 		struct scatterlist *sg_resp = &task->smp_task.smp_resp;
 		void *to = page_address(sg_page(sg_resp));
 
-		ts->stat = SAM_STAT_GOOD;
+		ts->stat = SAS_SAM_STAT_GOOD;
 
 		dma_unmap_sg(dev, &task->smp_task.smp_req, 1,
 			     DMA_TO_DEVICE);
···
 		break;
 
 	default:
-		ts->stat = SAM_STAT_CHECK_CONDITION;
+		ts->stat = SAS_SAM_STAT_CHECK_CONDITION;
 		break;
 	}
 

drivers/scsi/hisi_sas/hisi_sas_v2_hw.c

···
 	}
 		break;
 	case SAS_PROTOCOL_SMP:
-		ts->stat = SAM_STAT_CHECK_CONDITION;
+		ts->stat = SAS_SAM_STAT_CHECK_CONDITION;
 		break;
 
 	case SAS_PROTOCOL_SATA:
···
 		struct scatterlist *sg_resp = &task->smp_task.smp_resp;
 		void *to = page_address(sg_page(sg_resp));
 
-		ts->stat = SAM_STAT_GOOD;
+		ts->stat = SAS_SAM_STAT_GOOD;
 
 		dma_unmap_sg(dev, &task->smp_task.smp_req, 1,
 			     DMA_TO_DEVICE);
···
 	case SAS_PROTOCOL_STP:
 	case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
 	{
-		ts->stat = SAM_STAT_GOOD;
+		ts->stat = SAS_SAM_STAT_GOOD;
 		hisi_sas_sata_done(task, slot);
 		break;
 	}
 	default:
-		ts->stat = SAM_STAT_CHECK_CONDITION;
+		ts->stat = SAS_SAM_STAT_CHECK_CONDITION;
 		break;
 	}
 

drivers/scsi/hisi_sas/hisi_sas_v3_hw.c

···
 		hisi_sas_sata_done(task, slot);
 		break;
 	case SAS_PROTOCOL_SMP:
-		ts->stat = SAM_STAT_CHECK_CONDITION;
+		ts->stat = SAS_SAM_STAT_CHECK_CONDITION;
 		break;
 	default:
 		break;
···
 		struct scatterlist *sg_resp = &task->smp_task.smp_resp;
 		void *to = page_address(sg_page(sg_resp));
 
-		ts->stat = SAM_STAT_GOOD;
+		ts->stat = SAS_SAM_STAT_GOOD;
 
 		dma_unmap_sg(dev, &task->smp_task.smp_req, 1,
 			     DMA_TO_DEVICE);
···
 	case SAS_PROTOCOL_SATA:
 	case SAS_PROTOCOL_STP:
 	case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
-		ts->stat = SAM_STAT_GOOD;
+		ts->stat = SAS_SAM_STAT_GOOD;
 		hisi_sas_sata_done(task, slot);
 		break;
 	default:
-		ts->stat = SAM_STAT_CHECK_CONDITION;
+		ts->stat = SAS_SAM_STAT_CHECK_CONDITION;
 		break;
 	}
 

drivers/scsi/isci/request.c

···
 			if (!idev)
 				*status_ptr = SAS_DEVICE_UNKNOWN;
 			else
-				*status_ptr = SAM_STAT_TASK_ABORTED;
+				*status_ptr = SAS_SAM_STAT_TASK_ABORTED;
 
 			clear_bit(IREQ_COMPLETE_IN_TARGET, &request->flags);
 		}
···
 	default:
 		/* Task in the target is not done. */
 		*response_ptr = SAS_TASK_UNDELIVERED;
-		*status_ptr = SAM_STAT_TASK_ABORTED;
+		*status_ptr = SAS_SAM_STAT_TASK_ABORTED;
 
 		if (task->task_proto == SAS_PROTOCOL_SMP)
 			set_bit(IREQ_COMPLETE_IN_TARGET, &request->flags);
···
 	if (ac_err_mask(fis->status))
 		ts->stat = SAS_PROTO_RESPONSE;
 	else
-		ts->stat = SAM_STAT_GOOD;
+		ts->stat = SAS_SAM_STAT_GOOD;
 
 	ts->resp = SAS_TASK_COMPLETE;
 }
···
 	case SCI_IO_SUCCESS_IO_DONE_EARLY:
 
 		response = SAS_TASK_COMPLETE;
-		status   = SAM_STAT_GOOD;
+		status   = SAS_SAM_STAT_GOOD;
 		set_bit(IREQ_COMPLETE_IN_TARGET, &request->flags);
 
 		if (completion_status == SCI_IO_SUCCESS_IO_DONE_EARLY) {
···
 
 		/* Fail the I/O. */
 		response = SAS_TASK_UNDELIVERED;
-		status = SAM_STAT_TASK_ABORTED;
+		status = SAS_SAM_STAT_TASK_ABORTED;
 
 		clear_bit(IREQ_COMPLETE_IN_TARGET, &request->flags);
 		break;

drivers/scsi/isci/task.c

···
 
 			isci_task_refuse(ihost, task,
 					 SAS_TASK_UNDELIVERED,
-					 SAM_STAT_TASK_ABORTED);
+					 SAS_SAM_STAT_TASK_ABORTED);
 		} else {
 			task->task_state_flags |= SAS_TASK_AT_INITIATOR;
 			spin_unlock_irqrestore(&task->task_state_lock, flags);

drivers/scsi/libsas/sas_ata.c

···
 		}
 	}
 
-	if (stat->stat == SAS_PROTO_RESPONSE || stat->stat == SAM_STAT_GOOD ||
-	    ((stat->stat == SAM_STAT_CHECK_CONDITION &&
-	      dev->sata_dev.class == ATA_DEV_ATAPI))) {
+	if (stat->stat == SAS_PROTO_RESPONSE ||
+	    stat->stat == SAS_SAM_STAT_GOOD ||
+	    (stat->stat == SAS_SAM_STAT_CHECK_CONDITION &&
+	      dev->sata_dev.class == ATA_DEV_ATAPI)) {
 		memcpy(dev->sata_dev.fis, resp->ending_fis, ATA_RESP_FIS_SIZE);
 
 		if (!link->sactive) {

drivers/scsi/libsas/sas_expander.c

···
 			}
 		}
 		if (task->task_status.resp == SAS_TASK_COMPLETE &&
-		    task->task_status.stat == SAM_STAT_GOOD) {
+		    task->task_status.stat == SAS_SAM_STAT_GOOD) {
 			res = 0;
 			break;
 		}

drivers/scsi/libsas/sas_task.c

···
 	else if (iu->datapres == 1)
 		tstat->stat = iu->resp_data[3];
 	else if (iu->datapres == 2) {
-		tstat->stat = SAM_STAT_CHECK_CONDITION;
+		tstat->stat = SAS_SAM_STAT_CHECK_CONDITION;
 		tstat->buf_valid_size =
 			min_t(int, SAS_STATUS_BUF_SIZE,
 			      be32_to_cpu(iu->sense_data_len));
···
 	}
 	else
 		/* when datapres contains corrupt/unknown value... */
-		tstat->stat = SAM_STAT_CHECK_CONDITION;
+		tstat->stat = SAS_SAM_STAT_CHECK_CONDITION;
 }
 EXPORT_SYMBOL_GPL(sas_ssp_task_response);
 

drivers/scsi/mvsas/mv_sas.c

···
 		}
 
 		if (task->task_status.resp == SAS_TASK_COMPLETE &&
-		    task->task_status.stat == SAM_STAT_GOOD) {
+		    task->task_status.stat == SAS_SAM_STAT_GOOD) {
 			res = TMF_RESP_FUNC_COMPLETE;
 			break;
 		}
···
 	case SAS_PROTOCOL_SSP:
 		/* hw says status == 0, datapres == 0 */
 		if (rx_desc & RXQ_GOOD) {
-			tstat->stat = SAM_STAT_GOOD;
+			tstat->stat = SAS_SAM_STAT_GOOD;
 			tstat->resp = SAS_TASK_COMPLETE;
 		}
 		/* response frame present */
···
 						sizeof(struct mvs_err_info);
 			sas_ssp_task_response(mvi->dev, task, iu);
 		} else
-			tstat->stat = SAM_STAT_CHECK_CONDITION;
+			tstat->stat = SAS_SAM_STAT_CHECK_CONDITION;
 		break;
 
 	case SAS_PROTOCOL_SMP: {
 			struct scatterlist *sg_resp = &task->smp_task.smp_resp;
-			tstat->stat = SAM_STAT_GOOD;
+			tstat->stat = SAS_SAM_STAT_GOOD;
 			to = kmap_atomic(sg_page(sg_resp));
 			memcpy(to + sg_resp->offset,
 				slot->response + sizeof(struct mvs_err_info),
···
 		}
 
 	default:
-		tstat->stat = SAM_STAT_CHECK_CONDITION;
+		tstat->stat = SAS_SAM_STAT_CHECK_CONDITION;
 		break;
 	}
 	if (!slot->port->port_attached) {

drivers/scsi/pm8001/pm8001_hwi.c

···
 			   param);
 		if (param == 0) {
 			ts->resp = SAS_TASK_COMPLETE;
-			ts->stat = SAM_STAT_GOOD;
+			ts->stat = SAS_SAM_STAT_GOOD;
 		} else {
 			ts->resp = SAS_TASK_COMPLETE;
 			ts->stat = SAS_PROTO_RESPONSE;
···
 		pm8001_dbg(pm8001_ha, IO, "IO_SUCCESS\n");
 		if (param == 0) {
 			ts->resp = SAS_TASK_COMPLETE;
-			ts->stat = SAM_STAT_GOOD;
+			ts->stat = SAS_SAM_STAT_GOOD;
 			/* check if response is for SEND READ LOG */
 			if (pm8001_dev &&
 				(pm8001_dev->id & NCQ_READ_LOG_FLAG)) {
···
 	case IO_SUCCESS:
 		pm8001_dbg(pm8001_ha, IO, "IO_SUCCESS\n");
 		ts->resp = SAS_TASK_COMPLETE;
-		ts->stat = SAM_STAT_GOOD;
+		ts->stat = SAS_SAM_STAT_GOOD;
 		if (pm8001_dev)
 			atomic_dec(&pm8001_dev->running_req);
 		break;
···
 	case IO_ERROR_HW_TIMEOUT:
 		pm8001_dbg(pm8001_ha, IO, "IO_ERROR_HW_TIMEOUT\n");
 		ts->resp = SAS_TASK_COMPLETE;
-		ts->stat = SAM_STAT_BUSY;
+		ts->stat = SAS_SAM_STAT_BUSY;
 		break;
 	case IO_XFER_ERROR_BREAK:
 		pm8001_dbg(pm8001_ha, IO, "IO_XFER_ERROR_BREAK\n");
 		ts->resp = SAS_TASK_COMPLETE;
-		ts->stat = SAM_STAT_BUSY;
+		ts->stat = SAS_SAM_STAT_BUSY;
 		break;
 	case IO_XFER_ERROR_PHY_NOT_READY:
 		pm8001_dbg(pm8001_ha, IO, "IO_XFER_ERROR_PHY_NOT_READY\n");
 		ts->resp = SAS_TASK_COMPLETE;
-		ts->stat = SAM_STAT_BUSY;
+		ts->stat = SAS_SAM_STAT_BUSY;
 		break;
 	case IO_OPEN_CNX_ERROR_PROTOCOL_NOT_SUPPORTED:
 		pm8001_dbg(pm8001_ha, IO,
···
 	case IO_SUCCESS:
 		pm8001_dbg(pm8001_ha, EH, "IO_SUCCESS\n");
 		ts->resp = SAS_TASK_COMPLETE;
-		ts->stat = SAM_STAT_GOOD;
+		ts->stat = SAS_SAM_STAT_GOOD;
 		break;
 	case IO_NOT_VALID:
 		pm8001_dbg(pm8001_ha, EH, "IO_NOT_VALID\n");
···
 
 			spin_lock_irqsave(&task->task_state_lock, flags);
 			ts->resp = SAS_TASK_COMPLETE;
-			ts->stat = SAM_STAT_GOOD;
+			ts->stat = SAS_SAM_STAT_GOOD;
 			task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
 			task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
 			task->task_state_flags |= SAS_TASK_STATE_DONE;

drivers/scsi/pm8001/pm8001_sas.c

···
 		}
 
 		if (task->task_status.resp == SAS_TASK_COMPLETE &&
-			task->task_status.stat == SAM_STAT_GOOD) {
+			task->task_status.stat == SAS_SAM_STAT_GOOD) {
 			res = TMF_RESP_FUNC_COMPLETE;
 			break;
 		}
···
 		}
 
 		if (task->task_status.resp == SAS_TASK_COMPLETE &&
-			task->task_status.stat == SAM_STAT_GOOD) {
+			task->task_status.stat == SAS_SAM_STAT_GOOD) {
 			res = TMF_RESP_FUNC_COMPLETE;
 			break;
 

drivers/scsi/pm8001/pm80xx_hwi.c

···
 			   param);
 		if (param == 0) {
 			ts->resp = SAS_TASK_COMPLETE;
-			ts->stat = SAM_STAT_GOOD;
+			ts->stat = SAS_SAM_STAT_GOOD;
 		} else {
 			ts->resp = SAS_TASK_COMPLETE;
 			ts->stat = SAS_PROTO_RESPONSE;
···
 		pm8001_dbg(pm8001_ha, IO, "IO_SUCCESS\n");
 		if (param == 0) {
 			ts->resp = SAS_TASK_COMPLETE;
-			ts->stat = SAM_STAT_GOOD;
+			ts->stat = SAS_SAM_STAT_GOOD;
 			/* check if response is for SEND READ LOG */
 			if (pm8001_dev &&
 				(pm8001_dev->id & NCQ_READ_LOG_FLAG)) {
···
 	case IO_SUCCESS:
 		pm8001_dbg(pm8001_ha, IO, "IO_SUCCESS\n");
 		ts->resp = SAS_TASK_COMPLETE;
-		ts->stat = SAM_STAT_GOOD;
+		ts->stat = SAS_SAM_STAT_GOOD;
 		if (pm8001_dev)
 			atomic_dec(&pm8001_dev->running_req);
 		if (pm8001_ha->smp_exp_mode == SMP_DIRECT) {
···
 	case IO_ERROR_HW_TIMEOUT:
 		pm8001_dbg(pm8001_ha, IO, "IO_ERROR_HW_TIMEOUT\n");
 		ts->resp = SAS_TASK_COMPLETE;
-		ts->stat = SAM_STAT_BUSY;
+		ts->stat = SAS_SAM_STAT_BUSY;
 		break;
 	case IO_XFER_ERROR_BREAK:
 		pm8001_dbg(pm8001_ha, IO, "IO_XFER_ERROR_BREAK\n");
 		ts->resp = SAS_TASK_COMPLETE;
-		ts->stat = SAM_STAT_BUSY;
+		ts->stat = SAS_SAM_STAT_BUSY;
 		break;
 	case IO_XFER_ERROR_PHY_NOT_READY:
 		pm8001_dbg(pm8001_ha, IO, "IO_XFER_ERROR_PHY_NOT_READY\n");
 		ts->resp = SAS_TASK_COMPLETE;
-		ts->stat = SAM_STAT_BUSY;
+		ts->stat = SAS_SAM_STAT_BUSY;
 		break;
 	case IO_OPEN_CNX_ERROR_PROTOCOL_NOT_SUPPORTED:
 		pm8001_dbg(pm8001_ha, IO,
···
 
 			spin_lock_irqsave(&task->task_state_lock, flags);
 			ts->resp = SAS_TASK_COMPLETE;
-			ts->stat = SAM_STAT_GOOD;
+			ts->stat = SAS_SAM_STAT_GOOD;
 			task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
 			task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
 			task->task_state_flags |= SAS_TASK_STATE_DONE;

include/scsi/libsas.h

···
 };
 
 enum exec_status {
-	/* The SAM_STAT_.. codes fit in the lower 6 bits, alias some of
-	 * them here to silence 'case value not in enumerated type' warnings
+	/*
+	 * Values 0..0x7f are used to return the SAM_STAT_* codes.  To avoid
+	 * 'case value not in enumerated type' compiler warnings every value
+	 * returned through the exec_status enum needs an alias with the SAS_
+	 * prefix here.
 	 */
-	__SAM_STAT_CHECK_CONDITION = SAM_STAT_CHECK_CONDITION,
+	SAS_SAM_STAT_GOOD = SAM_STAT_GOOD,
+	SAS_SAM_STAT_BUSY = SAM_STAT_BUSY,
+	SAS_SAM_STAT_TASK_ABORTED = SAM_STAT_TASK_ABORTED,
+	SAS_SAM_STAT_CHECK_CONDITION = SAM_STAT_CHECK_CONDITION,
 
 	SAS_DEV_NO_RESPONSE = 0x80,
 	SAS_DATA_UNDERRUN,