usart: stm32f0: stm32f1: do not null-terminate the buffer in console_read()

source/platform/usart.c

@@ -150,19 +150,14 @@ ssize_t console_read(struct console *console, char *buf, size_t n)
 	char *p = buf;
 	char c;
 
-	*buf = '\0';
-
 	while (console_peek(&c, console, 1) == 0) {
 		switch (c) {
 		case '\004':
-			if (buf < p)
-				goto out;
-
 			console_getc(&c, console);
-			return 0;
+			return p - buf;
 		default:
 			if (((size_t)p - (size_t)buf) >= n)
-				goto out;
+				return p - buf;
 
 			*p++ = c;
 			console_getc(&c, console);
@@ -170,9 +165,6 @@ ssize_t console_read(struct console *console, char *buf, size_t n)
 		}
 	}
 
-out:
-	*p = '\0';
-
 	return p - buf;
 }