From: Ilpo Järvinen ilpo.jarvinen@linux.intel.com
[ Upstream commit 79ac88655dc0551e3571ad16bdabdbe65d61553e ]
Only CS7 and CS8 are supported but CSIZE is not sanitized with CS5 or CS6 to CS8.
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().
Fixes: 1da177e4c3f4 (Linux-2.6.12-rc2) Signed-off-by: Ilpo Järvinen ilpo.jarvinen@linux.intel.com Link: https://lore.kernel.org/r/20220519081808.3776-5-ilpo.jarvinen@linux.intel.co... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/tty/serial/serial_txx9.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/tty/serial/serial_txx9.c b/drivers/tty/serial/serial_txx9.c index ffb3fb1bda9e..61e0b65c3aaf 100644 --- a/drivers/tty/serial/serial_txx9.c +++ b/drivers/tty/serial/serial_txx9.c @@ -652,6 +652,8 @@ serial_txx9_set_termios(struct uart_port *port, struct ktermios *termios, case CS6: /* not supported */ case CS8: cval |= TXX9_SILCR_UMODE_8BIT; + termios->c_cflag &= ~CSIZE; + termios->c_cflag |= CS8; break; }