From 807fccf71939f10855a0256f0c999d665b80263f Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Date: Thu, 9 Mar 2023 10:09:17 +0200 Subject: [PATCH] serial: Use B0 instead of implicit zero assumption MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Compare against B0 rather than assume B0 equals zero, which is true for all archs but explicit B0 makes the code more obvious. Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20230309080923.11778-3-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/serial_core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index ee2aabcc8943..296d2c33ea7a 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -1662,10 +1662,10 @@ static void uart_set_termios(struct tty_struct *tty, cflag = tty->termios.c_cflag; /* Handle transition to B0 status */ - if ((old_termios->c_cflag & CBAUD) && !(cflag & CBAUD)) + if (((old_termios->c_cflag & CBAUD) != B0) && ((cflag & CBAUD) == B0)) uart_clear_mctrl(uport, TIOCM_RTS | TIOCM_DTR); /* Handle transition away from B0 status */ - else if (!(old_termios->c_cflag & CBAUD) && (cflag & CBAUD)) { + else if (((old_termios->c_cflag & CBAUD) == B0) && ((cflag & CBAUD) != B0)) { unsigned int mask = TIOCM_DTR; if (!(cflag & CRTSCTS) || !tty_throttled(tty))