tree-wide: use error codes in xxx_from_string()

src/shared/conf-parser.c

@@ -874,7 +874,7 @@ int config_parse_log_facility(
 
         x = log_facility_unshifted_from_string(rvalue);
         if (x < 0) {
-                log_syntax(unit, LOG_WARNING, filename, line, 0, "Failed to parse log facility, ignoring: %s", rvalue);
+                log_syntax(unit, LOG_WARNING, filename, line, x, "Failed to parse log facility, ignoring: %s", rvalue);
                 return 0;
         }
 
@@ -904,7 +904,7 @@ int config_parse_log_level(
 
         x = log_level_from_string(rvalue);
         if (x < 0) {
-                log_syntax(unit, LOG_WARNING, filename, line, 0, "Failed to parse log level, ignoring: %s", rvalue);
+                log_syntax(unit, LOG_WARNING, filename, line, x, "Failed to parse log level, ignoring: %s", rvalue);
                 return 0;
         }
 
@@ -937,7 +937,7 @@ int config_parse_signal(
 
         r = signal_from_string(rvalue);
         if (r <= 0) {
-                log_syntax(unit, LOG_WARNING, filename, line, 0, "Failed to parse signal name, ignoring: %s", rvalue);
+                log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse signal name, ignoring: %s", rvalue);
                 return 0;
         }
 

src/shared/ethtool-util.c

@@ -1092,7 +1092,7 @@ int config_parse_advertise(const char *unit,
                 /* We reuse the kernel provided enum which does not contain negative value. So, the cast
                  * below is mandatory. Otherwise, the check below always passes and access an invalid address. */
                 if ((int) mode < 0) {
-                        log_syntax(unit, LOG_WARNING, filename, line, 0,
+                        log_syntax(unit, LOG_WARNING, filename, line, mode,
                                    "Failed to parse advertise mode, ignoring: %s", w);
                         continue;
                 }