scsi: hisi_sas: Drop kmap_atomic() in SMP command completion

The call to kmap_atomic() in the SMP command completion code is
unnecessary, since kmap() is only really concerned with highmem, which is
not relevant on arm64. The controller only finds itself in arm64 systems.
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_v1_hw.c

@@ -1275,11 +1275,10 @@ static int slot_complete_v1_hw(struct hisi_hba *hisi_hba,
 	}
 	case SAS_PROTOCOL_SMP:
 	{
-		void *to;
 		struct scatterlist *sg_resp = &task->smp_task.smp_resp;
+		void *to = page_address(sg_page(sg_resp));
 
 		ts->stat = SAM_STAT_GOOD;
-		to = kmap_atomic(sg_page(sg_resp));
 
 		dma_unmap_sg(dev, &task->smp_task.smp_resp, 1,
 			     DMA_FROM_DEVICE);
@@ -1289,7 +1288,6 @@ static int slot_complete_v1_hw(struct hisi_hba *hisi_hba,
 		       hisi_sas_status_buf_addr_mem(slot) +
 		       sizeof(struct hisi_sas_err_record),
 		       sg_dma_len(sg_resp));
-		kunmap_atomic(to);
 		break;
 	}
 	case SAS_PROTOCOL_SATA:

drivers/scsi/hisi_sas/hisi_sas_v2_hw.c

@@ -2419,10 +2419,9 @@ slot_complete_v2_hw(struct hisi_hba *hisi_hba, struct hisi_sas_slot *slot)
 	case SAS_PROTOCOL_SMP:
 	{
 		struct scatterlist *sg_resp = &task->smp_task.smp_resp;
-		void *to;
+		void *to = page_address(sg_page(sg_resp));
 
 		ts->stat = SAM_STAT_GOOD;
-		to = kmap_atomic(sg_page(sg_resp));
 
 		dma_unmap_sg(dev, &task->smp_task.smp_resp, 1,
 			     DMA_FROM_DEVICE);
@@ -2432,7 +2431,6 @@ slot_complete_v2_hw(struct hisi_hba *hisi_hba, struct hisi_sas_slot *slot)
 		       hisi_sas_status_buf_addr_mem(slot) +
 		       sizeof(struct hisi_sas_err_record),
 		       sg_dma_len(sg_resp));
-		kunmap_atomic(to);
 		break;
 	}
 	case SAS_PROTOCOL_SATA:

drivers/scsi/hisi_sas/hisi_sas_v3_hw.c

@@ -2211,10 +2211,9 @@ slot_complete_v3_hw(struct hisi_hba *hisi_hba, struct hisi_sas_slot *slot)
 	}
 	case SAS_PROTOCOL_SMP: {
 		struct scatterlist *sg_resp = &task->smp_task.smp_resp;
-		void *to;
+		void *to = page_address(sg_page(sg_resp));
 
 		ts->stat = SAM_STAT_GOOD;
-		to = kmap_atomic(sg_page(sg_resp));
 
 		dma_unmap_sg(dev, &task->smp_task.smp_resp, 1,
 			     DMA_FROM_DEVICE);
@@ -2224,7 +2223,6 @@ slot_complete_v3_hw(struct hisi_hba *hisi_hba, struct hisi_sas_slot *slot)
 			hisi_sas_status_buf_addr_mem(slot) +
 		       sizeof(struct hisi_sas_err_record),
 		       sg_dma_len(sg_resp));
-		kunmap_atomic(to);
 		break;
 	}
 	case SAS_PROTOCOL_SATA: