network: remove redunant link name in message

Fixes #12454.

gcc was complaining that the link->ifname argument is NULL. Adding
assert(link->ifname) right before the call has no effect. It seems that
gcc is confused by the fact that log_link_warning_errno() internally
calls log_object(), with link->ifname passed as the object. log_object()
is also a macro and is does a check whether the passed object is NULL.
So we have a check if something is NULL right next an unconditional use
of it where it cannot be NULL. I think it's a bug in gcc.

Anyway, we don't need to use link->ifname here. log_object() already prepends
the object name to the message.

diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index 533193a..6fc8294 100644 (file)
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -338,8 +338,7 @@ static int link_enable_ipv6(Link *link) {
 
         r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", disabled);
         if (r < 0)
-                log_link_warning_errno(link, r, "Cannot %s IPv6 for interface %s: %m",
-                                       enable_disable(!disabled), link->ifname);
+                log_link_warning_errno(link, r, "Cannot %s IPv6: %m", enable_disable(!disabled));
         else
                 log_link_info(link, "IPv6 successfully %sd", enable_disable(!disabled));