serial: sandbox: support Unicode

Due to a conversion error the sandbox does not accept byte values 0x80-0xff
from the keyboard. The UEFI extended text input unit test requires Unicode
support.

Use unsigned char for the serial buffer.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>

diff --git a/drivers/serial/sandbox.c b/drivers/serial/sandbox.c
index 2f7bc24..1af5cc1 100644 (file)
--- a/drivers/serial/sandbox.c
+++ b/drivers/serial/sandbox.c
@@ -33,7 +33,7 @@ DECLARE_GLOBAL_DATA_PTR;
  *   serial_buf_write           == serial_buf_read -> empty buffer
  *   (serial_buf_write + 1) % 16 == serial_buf_read -> full buffer
  */
-static char serial_buf[16];
+static unsigned char serial_buf[16];
 static unsigned int serial_buf_write;
 static unsigned int serial_buf_read;