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
--- a/drivers/serial/sandbox.c
+++ b/drivers/serial/sandbox.c
@@ -33,7 +33,7 @@
* 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;