udev: net_setup_link: don't error out when we couldn't apply link con…

…fig (systemd#7328)

It is possible that kernel will reject our netlink message that
configures the link. However, we should always make sure that interface
will be named properly otherwise we can leave interfaces having
unpredictable kernel names. Thus we don't return early and continue to
export name and link file properties.

Suggested-by: Tom Gundersen <teg@jklm.no>

src/udev/udev-builtin-net_setup_link.c

@@ -51,10 +51,8 @@ static int builtin_net_setup_link(struct udev_device *dev, int argc, char **argv
         }
 
         r = link_config_apply(ctx, link, dev, &name);
-        if (r < 0) {
-                log_error_errno(r, "Could not apply link config to %s: %m", udev_device_get_sysname(dev));
-                return EXIT_FAILURE;
-        }
+        if (r < 0)
+                log_warning_errno(r, "Could not apply link config to %s, ignoring: %m", udev_device_get_sysname(dev));
 
         udev_builtin_add_property(dev, test, "ID_NET_LINK_FILE", link->filename);