lag: address review, single arg-count check and "d" only

Fold the "group with no ports" case into the argument-count guard
(cmd_words_len < 3) instead of a separate check, and accept only "d" for
delete, dropping the longer "delete" spelling. Update the serial-console
docs to match.

cmd_parser.c

@@ -395,7 +395,7 @@ void parse_lag(void)
 		return;
 	}
 
-	if (cmd_words_len < 2)
+	if (cmd_words_len < 3)
 		goto err;
 
 	// Parse group, expect only one number 0-9;
@@ -406,10 +406,7 @@ void parse_lag(void)
 	if (group > 3)
 		goto err;
 
-	if (cmd_words_len == 2)
-		goto err;
-
-	if (cmd_compare(2, "delete") || cmd_compare(2, "d")) {
+	if (cmd_compare(2, "d")) {
 		port_lag_members_set(group, 0);
 		return;
 	}
@@ -425,7 +422,7 @@ void parse_lag(void)
 	port_lag_members_set(group, members);
 	return;
 err:
-	print_string("Error: lag (show | <1-4> (delete | <port>...))\n");
+	print_string("Error: lag (show | <1-4> (d | <port>...))\n");
 }
 
 

doc/link_aggregation.md

@@ -48,9 +48,11 @@ void port_lag_hash_set(__xdata uint8_t lag, __xdata uint8_t hash_bits) __banked;
 ## LAG configuration on the Serial Console
 For testing the following commands are provided on the serial console:
 ```
-> lag <LAG-ID> [p1] [p2]...
-  Create or set a LAG. Trunk-ID is 1 or 2. Ports are physical ports
-  If only the LAG-ID is given but no members, the LAG is deleted
+> lag <LAG-ID> <p1> [p2]...
+  Create or set a LAG. LAG-ID is 1 to 4. Ports are physical ports.
+
+> lag <LAG-ID> d
+  Delete the LAG.
 
 > lag show
   Shows information on all 4 lags