nvme: update device error handling for list-subsys

The list-subsys command does not properly check if the nvme device
passed to the <device> option is a valid device or not. Fix the same.

Signed-off-by: Martin George <[email protected]>

Author: martin-gpy

nvme.c

@@ -3422,6 +3422,7 @@ static int list_subsys(int argc, char **argv, struct command *cmd,
 		struct plugin *plugin)
 {
 	_cleanup_nvme_root_ nvme_root_t r = NULL;
+	_cleanup_nvme_dev_ struct nvme_dev *dev = NULL;
 	nvme_print_flags_t flags;
 	const char *desc = "Retrieve information for subsystems";
 	nvme_scan_filter_t filter = NULL;
@@ -3459,12 +3460,10 @@ static int list_subsys(int argc, char **argv, struct command *cmd,
 	}
 
 	if (devname) {
-		int subsys_num;
+		err = parse_and_open(&dev, argc, argv, desc, opts);
+		if (err)
+			return err;
 
-		if (sscanf(devname, "nvme%dn%d", &subsys_num, &nsid) != 2) {
-			nvme_show_error("Invalid device name %s", devname);
-			return -EINVAL;
-		}
 		filter = nvme_match_device_filter;
 	}