scsi: core: Convert to scsi_execute_cmd()

scsi_execute_req() is going to be removed. Convert SCSI midlayer to
scsi_execute_cmd().
Signed-off-by: NMike Christie <michael.christie@oracle.com>
Reviewed-by: NJohn Garry <john.g.garry@oracle.com>
Reviewed-by: NBart Van Assche <bvanassche@acm.org>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/scsi.c

@@ -309,8 +309,8 @@ static int scsi_vpd_inquiry(struct scsi_device *sdev, unsigned char *buffer,
 	 * I'm not convinced we need to try quite this hard to get VPD, but
 	 * all the existing users tried this hard.
 	 */
-	result = scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buffer,
-				  len, NULL, 30 * HZ, 3, NULL);
+	result = scsi_execute_cmd(sdev, cmd, REQ_OP_DRV_IN, buffer, len,
+				  30 * HZ, 3, NULL);
 	if (result)
 		return -EIO;
 
@@ -510,6 +510,9 @@ int scsi_report_opcode(struct scsi_device *sdev, unsigned char *buffer,
 	unsigned char cmd[16];
 	struct scsi_sense_hdr sshdr;
 	int result, request_len;
+	const struct scsi_exec_args exec_args = {
+		.sshdr = &sshdr,
+	};
 
 	if (sdev->no_report_opcodes || sdev->scsi_level < SCSI_SPC_3)
 		return -EINVAL;
@@ -531,9 +534,8 @@ int scsi_report_opcode(struct scsi_device *sdev, unsigned char *buffer,
 	put_unaligned_be32(request_len, &cmd[6]);
 	memset(buffer, 0, len);
 
-	result = scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buffer,
-				  request_len, &sshdr, 30 * HZ, 3, NULL);
-
+	result = scsi_execute_cmd(sdev, cmd, REQ_OP_DRV_IN, buffer,
+				  request_len, 30 * HZ, 3, &exec_args);
 	if (result < 0)
 		return result;
 	if (result && scsi_sense_valid(&sshdr) &&

drivers/scsi/scsi_ioctl.c

@@ -69,12 +69,15 @@ static int ioctl_internal_command(struct scsi_device *sdev, char *cmd,
 {
 	int result;
 	struct scsi_sense_hdr sshdr;
+	const struct scsi_exec_args exec_args = {
+		.sshdr = &sshdr,
+	};
 
 	SCSI_LOG_IOCTL(1, sdev_printk(KERN_INFO, sdev,
 				      "Trying ioctl with scsi command %d\n", *cmd));
 
-	result = scsi_execute_req(sdev, cmd, DMA_NONE, NULL, 0,
-				  &sshdr, timeout, retries, NULL);
+	result = scsi_execute_cmd(sdev, cmd, REQ_OP_DRV_IN, NULL, 0, timeout,
+				  retries, &exec_args);
 
 	SCSI_LOG_IOCTL(2, sdev_printk(KERN_INFO, sdev,
 				      "Ioctl returned  0x%x\n", result));

drivers/scsi/scsi_lib.c

@@ -2084,6 +2084,9 @@ int scsi_mode_select(struct scsi_device *sdev, int pf, int sp,
 {
 	unsigned char cmd[10];
 	unsigned char *real_buffer;
+	const struct scsi_exec_args exec_args = {
+		.sshdr = sshdr,
+	};
 	int ret;
 
 	memset(cmd, 0, sizeof(cmd));
@@ -2133,8 +2136,8 @@ int scsi_mode_select(struct scsi_device *sdev, int pf, int sp,
 		cmd[4] = len;
 	}
 
-	ret = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, real_buffer, len,
-			       sshdr, timeout, retries, NULL);
+	ret = scsi_execute_cmd(sdev, cmd, REQ_OP_DRV_OUT, real_buffer, len,
+			       timeout, retries, &exec_args);
 	kfree(real_buffer);
 	return ret;
 }
@@ -2165,6 +2168,10 @@ scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage,
 	int header_length;
 	int result, retry_count = retries;
 	struct scsi_sense_hdr my_sshdr;
+	const struct scsi_exec_args exec_args = {
+		/* caller might not be interested in sense, but we need it */
+		.sshdr = sshdr ? : &my_sshdr,
+	};
 
 	memset(data, 0, sizeof(*data));
 	memset(&cmd[0], 0, 12);
@@ -2173,9 +2180,7 @@ scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage,
 	cmd[1] = dbd & 0x18;	/* allows DBD and LLBA bits */
 	cmd[2] = modepage;
 
-	/* caller might not be interested in sense, but we need it */
-	if (!sshdr)
-		sshdr = &my_sshdr;
+	sshdr = exec_args.sshdr;
 
  retry:
 	use_10_for_ms = sdev->use_10_for_ms || len > 255;
@@ -2198,8 +2203,8 @@ scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage,
 
 	memset(buffer, 0, len);
 
-	result = scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buffer, len,
-				  sshdr, timeout, retries, NULL);
+	result = scsi_execute_cmd(sdev, cmd, REQ_OP_DRV_IN, buffer, len,
+				  timeout, retries, &exec_args);
 	if (result < 0)
 		return result;
 
@@ -2279,12 +2284,15 @@ scsi_test_unit_ready(struct scsi_device *sdev, int timeout, int retries,
 	char cmd[] = {
 		TEST_UNIT_READY, 0, 0, 0, 0, 0,
 	};
+	const struct scsi_exec_args exec_args = {
+		.sshdr = sshdr,
+	};
 	int result;
 
 	/* try to eat the UNIT_ATTENTION if there are enough retries */
 	do {
-		result = scsi_execute_req(sdev, cmd, DMA_NONE, NULL, 0, sshdr,
-					  timeout, 1, NULL);
+		result = scsi_execute_cmd(sdev, cmd, REQ_OP_DRV_IN, NULL, 0,
+					  timeout, 1, &exec_args);
 		if (sdev->removable && scsi_sense_valid(sshdr) &&
 		    sshdr->sense_key == UNIT_ATTENTION)
 			sdev->changed = 1;

drivers/scsi/scsi_scan.c

@@ -210,7 +210,7 @@ static void scsi_unlock_floptical(struct scsi_device *sdev,
 	scsi_cmd[3] = 0;
 	scsi_cmd[4] = 0x2a;     /* size */
 	scsi_cmd[5] = 0;
-	scsi_execute_req(sdev, scsi_cmd, DMA_FROM_DEVICE, result, 0x2a, NULL,
+	scsi_execute_cmd(sdev, scsi_cmd, REQ_OP_DRV_IN, result, 0x2a,
 			 SCSI_TIMEOUT, 3, NULL);
 }
 
@@ -646,8 +646,12 @@ static int scsi_probe_lun(struct scsi_device *sdev, unsigned char *inq_result,
 	unsigned char scsi_cmd[MAX_COMMAND_SIZE];
 	int first_inquiry_len, try_inquiry_len, next_inquiry_len;
 	int response_len = 0;
-	int pass, count, result;
+	int pass, count, result, resid;
 	struct scsi_sense_hdr sshdr;
+	const struct scsi_exec_args exec_args = {
+		.sshdr = &sshdr,
+		.resid = &resid,
+	};
 
 	*bflags = 0;
 
@@ -665,18 +669,16 @@ static int scsi_probe_lun(struct scsi_device *sdev, unsigned char *inq_result,
 
 	/* Each pass gets up to three chances to ignore Unit Attention */
 	for (count = 0; count < 3; ++count) {
-		int resid;
-
 		memset(scsi_cmd, 0, 6);
 		scsi_cmd[0] = INQUIRY;
 		scsi_cmd[4] = (unsigned char) try_inquiry_len;
 
 		memset(inq_result, 0, try_inquiry_len);
 
-		result = scsi_execute_req(sdev,  scsi_cmd, DMA_FROM_DEVICE,
-					  inq_result, try_inquiry_len, &sshdr,
+		result = scsi_execute_cmd(sdev,  scsi_cmd, REQ_OP_DRV_IN,
+					  inq_result, try_inquiry_len,
 					  HZ / 2 + HZ * scsi_inq_timeout, 3,
-					  &resid);
+					  &exec_args);
 
 		SCSI_LOG_SCAN_BUS(3, sdev_printk(KERN_INFO, sdev,
 				"scsi scan: INQUIRY %s with code 0x%x\n",
@@ -1402,6 +1404,9 @@ static int scsi_report_lun_scan(struct scsi_target *starget, blist_flags_t bflag
 	struct scsi_sense_hdr sshdr;
 	struct scsi_device *sdev;
 	struct Scsi_Host *shost = dev_to_shost(&starget->dev);
+	const struct scsi_exec_args exec_args = {
+		.sshdr = &sshdr,
+	};
 	int ret = 0;
 
 	/*
@@ -1476,9 +1481,10 @@ static int scsi_report_lun_scan(struct scsi_target *starget, blist_flags_t bflag
 				"scsi scan: Sending REPORT LUNS to (try %d)\n",
 				retries));
 
-		result = scsi_execute_req(sdev, scsi_cmd, DMA_FROM_DEVICE,
-					  lun_data, length, &sshdr,
-					  SCSI_REPORT_LUNS_TIMEOUT, 3, NULL);
+		result = scsi_execute_cmd(sdev, scsi_cmd, REQ_OP_DRV_IN,
+					  lun_data, length,
+					  SCSI_REPORT_LUNS_TIMEOUT, 3,
+					  &exec_args);
 
 		SCSI_LOG_SCAN_BUS(3, sdev_printk (KERN_INFO, sdev,
 				"scsi scan: REPORT LUNS"