[PATCH 2/9] serial: digicolor-usart: Don't allow CS5-6

Ilpo Järvinen
2022-05-17T11:08:13Z

Only CS7 and CS8 seem supported but CSIZE is not sanitized to CS8 in
the default: block.

Set CSIZE correctly so that userspace knows the effective value.
Incorrect CSIZE also results in miscalculation of the frame bits in
tty_get_char_size() or in its predecessor where the roughly the same
code is directly within uart_update_timeout().

Cc: Baruch Siach <baruch@tkos.co.il>
Fixes: 5930cb3511df (serial: driver for Conexant Digicolor USART)
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---
drivers/tty/serial/digicolor-usart.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/tty/serial/digicolor-usart.c b/drivers/tty/serial/digicolor-usart.c
index 6d70fea76bb3..65e653eb5026 100644
--- a/drivers/tty/serial/digicolor-usart.c
+++ b/drivers/tty/serial/digicolor-usart.c
@@ -309,6 +309,8 @@ static void digicolor_uart_set_termios(struct uart_port *port,
case CS8:
default:
config |= UA_CONFIG_CHAR_LEN;
+ termios->c_cflag &= ~CSIZE;
+ termios->c_cflag |= CS8;
break;
}

--
2.30.2