diff --git a/tools/testing/nvdimm/test/nfit.c b/tools/testing/nvdimm/test/nfit.c
index a59174ba1d2a..ddf9b3095bfa 100644
--- a/tools/testing/nvdimm/test/nfit.c
+++ b/tools/testing/nvdimm/test/nfit.c
@@ -1224,6 +1224,11 @@ static int nfit_test_ctl(struct nvdimm_bus_descriptor *nd_desc,
 			i = get_dimm(nfit_mem, func);
 			if (i < 0)
 				return i;
+			if (i >= NUM_DCR) {
+				dev_WARN_ONCE(&t->pdev.dev, 1,
+						"ND_CMD_CALL only valid for nfit_test0\n");
+				return -EINVAL;
+			}
 
 			switch (func) {
 			case NVDIMM_INTEL_GET_SECURITY_STATE:
@@ -1252,11 +1257,11 @@ static int nfit_test_ctl(struct nvdimm_bus_descriptor *nd_desc,
 				break;
 			case NVDIMM_INTEL_OVERWRITE:
 				rc = nd_intel_test_cmd_overwrite(t,
-						buf, buf_len, i - t->dcr_idx);
+						buf, buf_len, i);
 				break;
 			case NVDIMM_INTEL_QUERY_OVERWRITE:
 				rc = nd_intel_test_cmd_query_overwrite(t,
-						buf, buf_len, i - t->dcr_idx);
+						buf, buf_len, i);
 				break;
 			case NVDIMM_INTEL_SET_MASTER_PASSPHRASE:
 				rc = nd_intel_test_cmd_master_set_pass(t,
@@ -1272,48 +1277,45 @@ static int nfit_test_ctl(struct nvdimm_bus_descriptor *nd_desc,
 				break;
 			case ND_INTEL_FW_GET_INFO:
 				rc = nd_intel_test_get_fw_info(t, buf,
-						buf_len, i - t->dcr_idx);
+						buf_len, i);
 				break;
 			case ND_INTEL_FW_START_UPDATE:
 				rc = nd_intel_test_start_update(t, buf,
-						buf_len, i - t->dcr_idx);
+						buf_len, i);
 				break;
 			case ND_INTEL_FW_SEND_DATA:
 				rc = nd_intel_test_send_data(t, buf,
-						buf_len, i - t->dcr_idx);
+						buf_len, i);
 				break;
 			case ND_INTEL_FW_FINISH_UPDATE:
 				rc = nd_intel_test_finish_fw(t, buf,
-						buf_len, i - t->dcr_idx);
+						buf_len, i);
 				break;
 			case ND_INTEL_FW_FINISH_QUERY:
 				rc = nd_intel_test_finish_query(t, buf,
-						buf_len, i - t->dcr_idx);
+						buf_len, i);
 				break;
 			case ND_INTEL_SMART:
 				rc = nfit_test_cmd_smart(buf, buf_len,
-						&t->smart[i - t->dcr_idx]);
+						&t->smart[i]);
 				break;
 			case ND_INTEL_SMART_THRESHOLD:
 				rc = nfit_test_cmd_smart_threshold(buf,
 						buf_len,
-						&t->smart_threshold[i -
-							t->dcr_idx]);
+						&t->smart_threshold[i]);
 				break;
 			case ND_INTEL_SMART_SET_THRESHOLD:
 				rc = nfit_test_cmd_smart_set_threshold(buf,
 						buf_len,
-						&t->smart_threshold[i -
-							t->dcr_idx],
-						&t->smart[i - t->dcr_idx],
+						&t->smart_threshold[i],
+						&t->smart[i],
 						&t->pdev.dev, t->dimm_dev[i]);
 				break;
 			case ND_INTEL_SMART_INJECT:
 				rc = nfit_test_cmd_smart_inject(buf,
 						buf_len,
-						&t->smart_threshold[i -
-							t->dcr_idx],
-						&t->smart[i - t->dcr_idx],
+						&t->smart_threshold[i],
+						&t->smart[i],
 						&t->pdev.dev, t->dimm_dev[i]);
 				break;
 			default: