nvme: use nvme_ns_rescan instead open coding

Use nvme_ns_rescan which wraps the IOCTL. This in preparation to make the
low level code private in libnvme.

Signed-off-by: Daniel Wagner <[email protected]>

Author: igaw

nvme.c

@@ -6808,8 +6808,7 @@ static int format_cmd(int argc, char **argv, struct command *acmd, struct plugin
 	printf("Success formatting namespace:%x\n", cfg.namespace_id);
 	if (nvme_transport_handle_is_direct(hdl) && cfg.lbaf != prev_lbaf) {
 		if (nvme_transport_handle_is_chardev(hdl)) {
-			if (ioctl(nvme_transport_handle_get_fd(hdl),
-				  NVME_IOCTL_RESCAN) < 0) {
+			if (nvme_ns_rescan(hdl) < 0) {
 				nvme_show_error("failed to rescan namespaces");
 				return -errno;
 			}