diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index eafcadc6ef07..94ff279b3b4a 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -4608,6 +4608,70 @@ static int resp_read_tape(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
 	return 0;
 }
 
+/*
+ * Returns 0 upon success or -1 with *scsi_status set to a SCSI status code upon
+ * failure.
+ */
+static int __resp_read_dt0_dix(struct scsi_cmnd *scp, u64 lba, u32 num,
+			       u32 ei_lba, int *scsi_status)
+{
+	const u8 *const cmd = scp->cmnd;
+
+	switch (prot_verify_read(scp, lba, num, ei_lba)) {
+	case 1: /* Guard tag error */
+		if (cmd[1] >> 5 != 3) { /* RDPROTECT != 3 */
+			mk_sense_buffer(scp, ABORTED_COMMAND,
+					LOGICAL_BLOCK_GUARD_CHECK_FAILED);
+			*scsi_status = check_condition_result;
+			return -1;
+		}
+		if (scp->prot_flags & SCSI_PROT_GUARD_CHECK) {
+			mk_sense_buffer(scp, ILLEGAL_REQUEST,
+					LOGICAL_BLOCK_GUARD_CHECK_FAILED);
+			*scsi_status = illegal_condition_result;
+			return -1;
+		}
+		break;
+	case 3: /* Reference tag error */
+		if (cmd[1] >> 5 != 3) { /* RDPROTECT != 3 */
+			mk_sense_buffer(scp, ABORTED_COMMAND,
+				LOGICAL_BLOCK_REFERENCE_TAG_CHECK_FAILED);
+			*scsi_status = check_condition_result;
+			return -1;
+		}
+		if (scp->prot_flags & SCSI_PROT_REF_CHECK) {
+			mk_sense_buffer(scp, ILLEGAL_REQUEST,
+				LOGICAL_BLOCK_REFERENCE_TAG_CHECK_FAILED);
+			*scsi_status = illegal_condition_result;
+			return -1;
+		}
+		break;
+	}
+	return 0;
+}
+
+/*
+ * Returns the number of bytes transferred, or -1 with *scsi_status set to a
+ * SCSI status code on failure.
+ */
+static int __resp_read_dt0(struct scsi_cmnd *scp, struct sdeb_store_info *sip,
+			   u64 lba, u32 num, u32 ei_lba, int *scsi_status)
+{
+	int ret;
+
+	/* DIX + T10 DIF */
+	if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
+		ret = __resp_read_dt0_dix(scp, lba, num, ei_lba, scsi_status);
+		if (ret < 0)
+			return ret;
+	}
+
+	ret = do_device_access(sip, scp, 0, lba, num, 0, false, false);
+	if (ret < 0)
+		*scsi_status = DID_ERROR << 16;
+	return ret;
+}
+
 static int resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
 {
 	bool check_prot;
@@ -4617,7 +4681,7 @@ static int resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
 	u64 lba;
 	struct sdeb_store_info *sip = devip2sip(devip, true);
 	u8 *cmd = scp->cmnd;
-	bool meta_data_locked = false;
+	int scsi_status;
 
 	switch (cmd[0]) {
 	case READ_16:
@@ -4699,48 +4763,16 @@ static int resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
 	}
 
 	if (sdebug_dev_is_zoned(devip) ||
-	    (sdebug_dix && scsi_prot_sg_count(scp)))  {
+	    (sdebug_dix && scsi_prot_sg_count(scp))) {
 		sdeb_meta_read_lock(sip);
-		meta_data_locked = true;
-	}
-
-	/* DIX + T10 DIF */
-	if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
-		switch (prot_verify_read(scp, lba, num, ei_lba)) {
-		case 1: /* Guard tag error */
-			if (cmd[1] >> 5 != 3) { /* RDPROTECT != 3 */
-				sdeb_meta_read_unlock(sip);
-				mk_sense_buffer(scp, ABORTED_COMMAND,
-					LOGICAL_BLOCK_GUARD_CHECK_FAILED);
-				return check_condition_result;
-			} else if (scp->prot_flags & SCSI_PROT_GUARD_CHECK) {
-				sdeb_meta_read_unlock(sip);
-				mk_sense_buffer(scp, ILLEGAL_REQUEST,
-					LOGICAL_BLOCK_GUARD_CHECK_FAILED);
-				return illegal_condition_result;
-			}
-			break;
-		case 3: /* Reference tag error */
-			if (cmd[1] >> 5 != 3) { /* RDPROTECT != 3 */
-				sdeb_meta_read_unlock(sip);
-				mk_sense_buffer(scp, ABORTED_COMMAND,
-				      LOGICAL_BLOCK_REFERENCE_TAG_CHECK_FAILED);
-				return check_condition_result;
-			} else if (scp->prot_flags & SCSI_PROT_REF_CHECK) {
-				sdeb_meta_read_unlock(sip);
-				mk_sense_buffer(scp, ILLEGAL_REQUEST,
-				      LOGICAL_BLOCK_REFERENCE_TAG_CHECK_FAILED);
-				return illegal_condition_result;
-			}
-			break;
-		}
-	}
-
-	ret = do_device_access(sip, scp, 0, lba, num, 0, false, false);
-	if (meta_data_locked)
+		ret = __resp_read_dt0(scp, sip, lba, num, ei_lba, &scsi_status);
 		sdeb_meta_read_unlock(sip);
-	if (unlikely(ret == -1))
-		return DID_ERROR << 16;
+	} else {
+		ret = __resp_read_dt0(scp, sip, lba, num, ei_lba, &scsi_status);
+	}
+
+	if (unlikely(ret < 0))
+		return scsi_status;
 
 	scsi_set_resid(scp, scsi_bufflen(scp) - ret);