diff --git a/.github/workflows/run-nightly-tests.yml b/.github/workflows/run-nightly-tests.yml
index 58fc2a7712..e8ac232ad6 100644
--- a/.github/workflows/run-nightly-tests.yml
+++ b/.github/workflows/run-nightly-tests.yml
@@ -16,7 +16,7 @@ jobs:
       #BDEV0 is an environment variable of the self-hosted runner instance
       #that contains a valid nvme ctrl name which is capable of the nvm
       #command set.
-      options: '--privileged -e BDEV0'
+      options: '--privileged -v "/dev":"/dev":z -e BDEV0'
     steps:
       - name: Output kernel version
         run: |
diff --git a/nvme.c b/nvme.c
index 233b2dc563..6e8ba0f8a6 100644
--- a/nvme.c
+++ b/nvme.c
@@ -300,48 +300,7 @@ static bool is_blkdev(struct nvme_dev *dev)
 	return S_ISBLK(dev->direct.stat.st_mode);
 }
 
-static bool is_nvme_dev(char *dev)
-{
-	int instance;
-	int head_instance;
-
-	return sscanf(basename(dev), "nvme%dn%d", &instance, &head_instance) == 1;
-}
-
-static __u32 get_nsid(struct argconfig_commandline_options *opts)
-{
-	__u32 *nsid = argconfig_get_value(opts, "namespace-id");
-
-	if (nsid && *nsid != NVME_NSID_ALL)
-		return *nsid;
-
-	return NVME_NSID_NONE;
-}
-
-static int open_blkdev_direct(char *dev, int flags, __u32 nsid)
-{
-	_cleanup_free_ char *blkdev = NULL;
-	int fd = -1;
-
-	if (is_nvme_dev(dev) && nsid) {
-		if (asprintf(&blkdev, "%sn%d", dev, nsid) < 0)
-			blkdev = NULL;
-	}
-
-	if (blkdev) {
-		fd = open(blkdev, flags);
-		print_debug("blkdev: %s, fd: %d\n", blkdev, fd);
-	}
-
-	if (fd < 0) {
-		fd = open(dev, flags);
-		print_debug("dev: %s, fd: %d\n", dev, fd);
-	}
-
-	return fd;
-}
-
-static int open_dev_direct(struct nvme_dev **devp, char *devstr, int flags, __u32 nsid)
+static int open_dev_direct(struct nvme_dev **devp, char *devstr, int flags)
 {
 	struct nvme_dev *dev;
 	int err;
@@ -352,7 +311,7 @@ static int open_dev_direct(struct nvme_dev **devp, char *devstr, int flags, __u3
 
 	dev->type = NVME_DEV_DIRECT;
 	dev->name = basename(devstr);
-	err = open_blkdev_direct(devstr, flags, nsid);
+	err = open(devstr, flags);
 	if (err < 0) {
 		nvme_show_perror(devstr);
 		goto err_free;
@@ -454,12 +413,10 @@ static int check_arg_dev(int argc, char **argv)
 	return 0;
 }
 
-static int get_dev(struct nvme_dev **dev, int argc, char **argv, int flags,
-		   struct argconfig_commandline_options *opts)
+static int get_dev(struct nvme_dev **dev, int argc, char **argv, int flags)
 {
 	char *devname;
 	int ret;
-	__u32 nsid = get_nsid(opts);
 
 	ret = check_arg_dev(argc, argv);
 	if (ret)
@@ -471,7 +428,7 @@ static int get_dev(struct nvme_dev **dev, int argc, char **argv, int flags,
 	if (!strncmp(devname, "mctp:", strlen("mctp:")))
 		ret = open_dev_mi_mctp(dev, devname);
 	else
-		ret = open_dev_direct(dev, devname, flags, nsid);
+		ret = open_dev_direct(dev, devname, flags);
 
 	return ret ? -errno : 0;
 }
@@ -501,7 +458,7 @@ int parse_and_open(struct nvme_dev **dev, int argc, char **argv,
 	if (ret)
 		return ret;
 
-	ret = get_dev(dev, argc, argv, O_RDONLY, opts);
+	ret = get_dev(dev, argc, argv, O_RDONLY);
 	if (ret < 0)
 		argconfig_print_help(desc, opts);
 
@@ -509,14 +466,14 @@ int parse_and_open(struct nvme_dev **dev, int argc, char **argv,
 }
 
 int open_exclusive(struct nvme_dev **dev, int argc, char **argv,
-		   int ignore_exclusive, struct argconfig_commandline_options *opts)
+		   int ignore_exclusive)
 {
 	int flags = O_RDONLY;
 
 	if (!ignore_exclusive)
 		flags |= O_EXCL;
 
-	return get_dev(dev, argc, argv, flags, opts);
+	return get_dev(dev, argc, argv, flags);
 }
 
 int validate_output_format(const char *format, nvme_print_flags_t *flags)
@@ -6275,7 +6232,7 @@ static int format_cmd(int argc, char **argv, struct command *cmd, struct plugin
 	if (err)
 		return err;
 
-	err = open_exclusive(&dev, argc, argv, cfg.force, opts);
+	err = open_exclusive(&dev, argc, argv, cfg.force);
 	if (err) {
 		if (errno == EBUSY) {
 			fprintf(stderr, "Failed to open %s.\n", basename(argv[optind]));
@@ -7465,23 +7422,6 @@ static int copy_cmd(int argc, char **argv, struct command *cmd, struct plugin *p
 	return err;
 }
 
-static void io_cmd_show_error(struct nvme_dev *dev, int err, const char *cmd)
-{
-	if (err > 0) {
-		nvme_show_status(err);
-		return;
-	}
-
-	nvme_show_init();
-
-	nvme_show_error("%s: %s", cmd, nvme_strerror(errno));
-
-	if (is_chardev(dev))
-		nvme_show_result("char device provided but blkdev is needed, e.g. /dev/nvme0n1");
-
-	nvme_show_finish();
-}
-
 static int flush_cmd(int argc, char **argv, struct command *cmd, struct plugin *plugin)
 {
 	const char *desc = "Commit data and metadata associated with\n"
@@ -7517,8 +7457,10 @@ static int flush_cmd(int argc, char **argv, struct command *cmd, struct plugin *
 	}
 
 	err = nvme_flush(dev_fd(dev), cfg.namespace_id);
-	if (err)
-		io_cmd_show_error(dev, err, "flush");
+	if (err < 0)
+		nvme_show_error("flush: %s", nvme_strerror(errno));
+	else if (err != 0)
+		nvme_show_status(err);
 	else
 		printf("NVMe Flush: success\n");
 
@@ -7985,7 +7927,7 @@ static int submit_io(int opcode, char *command, const char *desc, int argc, char
 		err = parse_args(argc, argv, desc, opts);
 		if (err)
 			return err;
-		err = open_exclusive(&dev, argc, argv, cfg.force, opts);
+		err = open_exclusive(&dev, argc, argv, cfg.force);
 		if (err) {
 			if (errno == EBUSY) {
 				fprintf(stderr, "Failed to open %s.\n", basename(argv[optind]));
diff --git a/util/argconfig.c b/util/argconfig.c
index 9a3faf0ed6..34607202ae 100644
--- a/util/argconfig.c
+++ b/util/argconfig.c
@@ -429,16 +429,3 @@ bool argconfig_parse_seen(struct argconfig_commandline_options *s,
 
 	return false;
 }
-
-void *argconfig_get_value(struct argconfig_commandline_options *s, const char *option)
-{
-	for (; s && s->option; s++) {
-		if (!strcmp(s->option, option)) {
-			if (s->seen)
-				return s->default_value;
-			break;
-		}
-	}
-
-	return NULL;
-}
diff --git a/util/argconfig.h b/util/argconfig.h
index f0d2c36b2d..44d2e4e6ab 100644
--- a/util/argconfig.h
+++ b/util/argconfig.h
@@ -190,5 +190,4 @@ int argconfig_parse_comma_sep_array_u64(char *string, __u64 *val,
 void print_word_wrapped(const char *s, int indent, int start, FILE *stream);
 bool argconfig_parse_seen(struct argconfig_commandline_options *options,
 			  const char *option);
-void *argconfig_get_value(struct argconfig_commandline_options *s, const char *option);
 #endif