diff --git a/plugins/memblaze/memblaze-nvme.c b/plugins/memblaze/memblaze-nvme.c
index a1888f46a0..88df87e97a 100644
--- a/plugins/memblaze/memblaze-nvme.c
+++ b/plugins/memblaze/memblaze-nvme.c
@@ -422,7 +422,7 @@ static int mb_get_additional_smart_log(int argc, char **argv, struct command *cm
 	    "Get Memblaze vendor specific additional smart log, and show it.";
 	const char *namespace = "(optional) desired namespace";
 	const char *raw = "dump output in binary format";
-	struct nvme_dev *dev;
+	_cleanup_nvme_dev_ struct nvme_dev *dev = NULL;
 	struct config {
 		__u32 namespace_id;
 		bool  raw_binary;
@@ -455,7 +455,6 @@ static int mb_get_additional_smart_log(int argc, char **argv, struct command *cm
 	if (err > 0)
 		nvme_show_status(err);
 
-	dev_close(dev);
 	return err;
 }
 
@@ -479,7 +478,7 @@ static int mb_get_powermanager_status(int argc, char **argv, struct command *cmd
 	const char *desc = "Get Memblaze power management ststus\n	(value 0 - 25w, 1 - 20w, 2 - 15w)";
 	__u32 result;
 	__u32 feature_id = MB_FEAT_POWER_MGMT;
-	struct nvme_dev *dev;
+	_cleanup_nvme_dev_ struct nvme_dev *dev = NULL;
 	int err;
 
 	OPT_ARGS(opts) = {
@@ -511,7 +510,6 @@ static int mb_get_powermanager_status(int argc, char **argv, struct command *cmd
 		       mb_feature_to_string(feature_id), nvme_select_to_string(0), result);
 	else if (err > 0)
 		nvme_show_status(err);
-	dev_close(dev);
 	return err;
 }
 
@@ -521,7 +519,7 @@ static int mb_set_powermanager_status(int argc, char **argv, struct command *cmd
 	const char *desc = "Set Memblaze power management status\n	(value 0 - 25w, 1 - 20w, 2 - 15w)";
 	const char *value = "new value of feature (required)";
 	const char *save = "specifies that the controller shall save the attribute";
-	struct nvme_dev *dev;
+	_cleanup_nvme_dev_ struct nvme_dev *dev = NULL;
 	__u32 result;
 	int err;
 
@@ -571,7 +569,6 @@ static int mb_set_powermanager_status(int argc, char **argv, struct command *cmd
 	else if (err > 0)
 		nvme_show_status(err);
 
-	dev_close(dev);
 	return err;
 }
 
@@ -587,7 +584,7 @@ static int mb_set_high_latency_log(int argc, char **argv, struct command *cmd,
 			   "	p2 value: 1 .. 5000 ms";
 	const char *param = "input parameters";
 	int param1 = 0, param2 = 0;
-	struct nvme_dev *dev;
+	_cleanup_nvme_dev_ struct nvme_dev *dev = NULL;
 	__u32 result;
 	int err;
 
@@ -614,12 +611,10 @@ static int mb_set_high_latency_log(int argc, char **argv, struct command *cmd,
 
 	if (parse_params(cfg.param, 2, &param1, &param2)) {
 		printf("setfeature: invalid formats %s\n", cfg.param);
-		dev_close(dev);
 		return -EINVAL;
 	}
 	if ((param1 == 1) && (param2 < P2MIN || param2 > P2MAX)) {
 		printf("setfeature: invalid high io latency threshold %d\n", param2);
-		dev_close(dev);
 		return -EINVAL;
 	}
 	cfg.value = (param1 << MB_FEAT_HIGH_LATENCY_VALUE_SHIFT) | param2;
@@ -648,7 +643,6 @@ static int mb_set_high_latency_log(int argc, char **argv, struct command *cmd,
 	else if (err > 0)
 		nvme_show_status(err);
 
-	dev_close(dev);
 	return err;
 }
 
@@ -744,7 +738,7 @@ static int mb_high_latency_log_print(int argc, char **argv, struct command *cmd,
 {
 	const char *desc = "Get Memblaze high latency log";
 	char buf[LOG_PAGE_SIZE];
-	struct nvme_dev *dev;
+	_cleanup_nvme_dev_ struct nvme_dev *dev = NULL;
 	FILE *fdi = NULL;
 	int err;
 
@@ -774,7 +768,6 @@ static int mb_high_latency_log_print(int argc, char **argv, struct command *cmd,
 
 	if (fdi)
 		fclose(fdi);
-	dev_close(dev);
 	return err;
 }
 
@@ -803,7 +796,7 @@ static int mb_selective_download(int argc, char **argv, struct command *cmd, str
 	int xfer = 4096;
 	void *fw_buf;
 	int selectNo, fw_fd, fw_size, err, offset = 0;
-	struct nvme_dev *dev;
+	_cleanup_nvme_dev_ struct nvme_dev *dev = NULL;
 	struct stat sb;
 	int i;
 
@@ -917,7 +910,6 @@ static int mb_selective_download(int argc, char **argv, struct command *cmd, str
 out_close:
 	close(fw_fd);
 out:
-	dev_close(dev);
 	return err;
 }
 
@@ -1011,7 +1003,7 @@ static int mb_lat_stats_log_print(int argc, char **argv, struct command *cmd, st
 	char stats[LOG_PAGE_SIZE];
 	char f1[] = FID_C1_LOG_FILENAME;
 	char f2[] = FID_C2_LOG_FILENAME;
-	struct nvme_dev *dev;
+	_cleanup_nvme_dev_ struct nvme_dev *dev = NULL;
 	int err;
 
 	const char *desc = "Get Latency Statistics log and show it.";
@@ -1041,7 +1033,6 @@ static int mb_lat_stats_log_print(int argc, char **argv, struct command *cmd, st
 	else
 		nvme_show_status(err);
 
-	dev_close(dev);
 	return err;
 }
 
@@ -1049,7 +1040,7 @@ static int memblaze_clear_error_log(int argc, char **argv, struct command *cmd,
 		struct plugin *plugin)
 {
 	char *desc = "Clear Memblaze devices error log.";
-	struct nvme_dev *dev;
+	_cleanup_nvme_dev_ struct nvme_dev *dev = NULL;
 	int err;
 
 	__u32 result;
@@ -1098,7 +1089,6 @@ static int memblaze_clear_error_log(int argc, char **argv, struct command *cmd,
 	else if (err > 0)
 		nvme_show_status(err);
 
-	dev_close(dev);
 	return err;
 }
 
@@ -1116,7 +1106,7 @@ static int mb_set_lat_stats(int argc, char **argv, struct command *command, stru
 	const __u32 cdw12 = 0x0;
 	const __u32 data_len = 32;
 	const __u32 save = 0;
-	struct nvme_dev *dev;
+	_cleanup_nvme_dev_ struct nvme_dev *dev = NULL;
 	void *buf = NULL;
 	__u32 result;
 	int err;
@@ -1190,7 +1180,6 @@ static int mb_set_lat_stats(int argc, char **argv, struct command *command, stru
 			       result);
 		} else {
 			printf("Could not read feature id 0xE2.\n");
-			dev_close(dev);
 			return err;
 		}
 		break;
@@ -1210,7 +1199,6 @@ static int mb_set_lat_stats(int argc, char **argv, struct command *command, stru
 		printf("%d not supported.\n", option);
 		err = EINVAL;
 	}
-	dev_close(dev);
 	return err;
 }
 
@@ -1620,9 +1608,7 @@ static int mb_get_smart_log_add(int argc, char **argv, struct command *cmd, stru
 		OPT_FLAG("raw-binary", 'b', &cfg.raw_binary, "dump the whole log buffer in binary format"),
 		OPT_END()};
 
-	// Open device
-
-	struct nvme_dev *dev = NULL;
+	_cleanup_nvme_dev_ struct nvme_dev *dev = NULL;
 
 	err = parse_and_open(&dev, argc, argv, cmd->help, opts);
 	if (err)
@@ -1645,9 +1631,6 @@ static int mb_get_smart_log_add(int argc, char **argv, struct command *cmd, stru
 		nvme_show_error("%s: %s", cmd->name, nvme_strerror(errno));
 	}
 
-	// Close device
-
-	dev_close(dev);
 	return err;
 }
 
@@ -1761,9 +1744,7 @@ static int mb_set_latency_feature(int argc, char **argv, struct command *cmd, st
 					"set trim high latency log threshold, it's a 0-based value and unit is 10ms"),
 		OPT_END()};
 
-	// Open device
-
-	struct nvme_dev *dev = NULL;
+	_cleanup_nvme_dev_ struct nvme_dev *dev = NULL;
 
 	err = parse_and_open(&dev, argc, argv, cmd->help, opts);
 	if (err)
@@ -1802,9 +1783,6 @@ static int mb_set_latency_feature(int argc, char **argv, struct command *cmd, st
 	else
 		nvme_show_error("%s: %s", cmd->name, nvme_strerror(errno));
 
-	// Close device
-
-	dev_close(dev);
 	return err;
 }
 
@@ -1817,9 +1795,7 @@ static int mb_get_latency_feature(int argc, char **argv, struct command *cmd, st
 	OPT_ARGS(opts) = {
 		OPT_END()};
 
-	// Open device
-
-	struct nvme_dev *dev = NULL;
+	_cleanup_nvme_dev_ struct nvme_dev *dev = NULL;
 
 	err = parse_and_open(&dev, argc, argv, cmd->help, opts);
 	if (err)
@@ -1850,8 +1826,5 @@ static int mb_get_latency_feature(int argc, char **argv, struct command *cmd, st
 		nvme_show_error("%s: %s", cmd->name, nvme_strerror(errno));
 	}
 
-	// Close device
-
-	dev_close(dev);
 	return err;
 }