uart: fix send possible buffer overflow when logging to uart.

The overflow would be temporary and nothing harmful would happen, but some logging would get lost.
eriksl · Jun 16, 2019 · ba95b06 · ba95b06
1 parent d94bf6e
commit ba95b06
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/uart.c b/uart.c
@@ -114,7 +114,8 @@ iram void uart_send(unsigned int uart, unsigned int byte)
 	if(!init_done)
 		return;
 
-	queue_push(&uart_send_queue[uart], byte);
+	if(!queue_full(&uart_send_queue[uart]))
+		queue_push(&uart_send_queue[uart], byte);
 }
 
 iram void uart_send_string(unsigned int uart, const string_t *string)