tree-wide: clean up log_syntax() usage

- Rely everywhere that we use abs() on the error code passed in anyway,
  thus don't need to explicitly negate what we pass in

- Never attach synthetic error number information to log messages. Only
  log about errors we *receive* with the error number we got there,
  don't log any synthetic error, that don#t even propagate, but just eat
  up.

- Be more careful with attaching exactly the error we get, instead of
  errno or unrelated errors randomly.

- Fix one occasion where the error number and line number got swapped.

- Make sure we never tape over OOM issues, or inability to resolve
  specifiers

1 files changed, 1 insertions, 1 deletions

diff --git a/src/network/networkd-fdb.c b/src/network/networkd-fdb.c
index 22efadb843..9cb63cb79f 100644
--- a/src/network/networkd-fdb.c
+++ b/src/network/networkd-fdb.c
@@ -197,7 +197,7 @@ int config_parse_fdb_hwaddr(
                    &fdb_entry->mac_addr->ether_addr_octet[5]);
 
         if (ETHER_ADDR_LEN != r) {
-                log_syntax(unit, LOG_ERR, filename, line, EINVAL, "Not a valid MAC address, ignoring assignment: %s", rvalue);
+                log_syntax(unit, LOG_ERR, filename, line, 0, "Not a valid MAC address, ignoring assignment: %s", rvalue);
                 return 0;
         }