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

eriksl · eriksl · commit ba95b06ea86b · 2019-06-16T16:49:31.000+02:00
The overflow would be temporary and nothing harmful would happen, but
some logging would get lost.
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)

Original file line number	Diff line number	Diff line change
`@@ -114,7 +114,8 @@ iram void uart_send(unsigned int uart, unsigned int byte)`
`114`	`114`	`if(!init_done)`
`115`	`115`	`return;`
`116`	`116`
`117`		`- queue_push(&uart_send_queue[uart], byte);`
	`117`	`+ if(!queue_full(&uart_send_queue[uart]))`
	`118`	`+ queue_push(&uart_send_queue[uart], byte);`
`118`	`119`	`}`
`119`	`120`
`120`	`121`	`iram void uart_send_string(unsigned int uart, const string_t *string)`