diff --git a/drivers/scsi/stex.c b/drivers/scsi/stex.c
index 72f6d8015358..4b6861cf0417 100644
--- a/drivers/scsi/stex.c
+++ b/drivers/scsi/stex.c
@@ -461,23 +461,6 @@ static void stex_internal_copy(struct scsi_cmnd *cmd,
 	}
 }
 
-static int stex_direct_copy(struct scsi_cmnd *cmd,
-	const void *src, size_t count)
-{
-	size_t cp_len = count;
-	int n_elem = 0;
-
-	n_elem = scsi_dma_map(cmd);
-	if (n_elem < 0)
-		return 0;
-
-	stex_internal_copy(cmd, src, &cp_len, n_elem, ST_TO_CMD);
-
-	scsi_dma_unmap(cmd);
-
-	return cp_len == count;
-}
-
 static void stex_controller_info(struct st_hba *hba, struct st_ccb *ccb)
 {
 	struct st_frame *p;
@@ -569,8 +552,10 @@ stex_queuecommand(struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd *))
 		unsigned char page;
 		page = cmd->cmnd[2] & 0x3f;
 		if (page == 0x8 || page == 0x3f) {
-			stex_direct_copy(cmd, ms10_caching_page,
-					sizeof(ms10_caching_page));
+			size_t cp_len = sizeof(ms10_caching_page);
+			stex_internal_copy(cmd, ms10_caching_page,
+					   &cp_len, scsi_sg_count(cmd),
+					   ST_TO_CMD);
 			cmd->result = DID_OK << 16 | COMMAND_COMPLETE << 8;
 			done(cmd);
 		} else
@@ -599,8 +584,10 @@ stex_queuecommand(struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd *))
 		if (id != host->max_id - 1)
 			break;
 		if (lun == 0 && (cmd->cmnd[1] & INQUIRY_EVPD) == 0) {
-			stex_direct_copy(cmd, console_inq_page,
-				sizeof(console_inq_page));
+			size_t cp_len = sizeof(console_inq_page);
+			stex_internal_copy(cmd, console_inq_page,
+					   &cp_len, scsi_sg_count(cmd),
+					   ST_TO_CMD);
 			cmd->result = DID_OK << 16 | COMMAND_COMPLETE << 8;
 			done(cmd);
 		} else
@@ -609,6 +596,7 @@ stex_queuecommand(struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd *))
 	case PASSTHRU_CMD:
 		if (cmd->cmnd[1] == PASSTHRU_GET_DRVVER) {
 			struct st_drvver ver;
+			size_t cp_len = sizeof(ver);
 			ver.major = ST_VER_MAJOR;
 			ver.minor = ST_VER_MINOR;
 			ver.oem = ST_OEM;
@@ -616,7 +604,9 @@ stex_queuecommand(struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd *))
 			ver.signature[0] = PASSTHRU_SIGNATURE;
 			ver.console_id = host->max_id - 1;
 			ver.host_no = hba->host->host_no;
-			cmd->result = stex_direct_copy(cmd, &ver, sizeof(ver)) ?
+			stex_internal_copy(cmd, &ver, &cp_len,
+					   scsi_sg_count(cmd), ST_TO_CMD);
+			cmd->result = sizeof(ver) == cp_len ?
 				DID_OK << 16 | COMMAND_COMPLETE << 8 :
 				DID_ERROR << 16 | COMMAND_COMPLETE << 8;
 			done(cmd);