pcmcia: synclink_cs: Don't allow CS5-6

Only CS7 and CS8 seem supported but CSIZE was not sanitized in termios
c_cflag. The driver sets 7 bits whenever data_bits is not 8 so default
to CS7 when CSIZE is not CS8.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20220519081808.3776-10-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c
index c20f2cb784e86659c09ee48d0c73e38c63ef142c..0daf1bc95360453d1201329218e437ab8e750535 100644 (file)
--- a/drivers/char/pcmcia/synclink_cs.c
+++ b/drivers/char/pcmcia/synclink_cs.c
@@ -1418,7 +1418,11 @@ static void mgslpc_change_params(MGSLPC_INFO *info, struct tty_struct *tty)
                info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
 
        /* byte size and parity */
-
+       if ((cflag & CSIZE) != CS8) {
+               cflag &= ~CSIZE;
+               cflag |= CS7;
+               tty->termios.c_cflag = cflag;
+       }
        info->params.data_bits = tty_get_char_size(cflag);
 
        if (cflag & CSTOPB)