iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

serial: Use B0 instead of implicit zero assumption

Browse Source 
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 <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20230309080923.11778-3-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ilpo Järvinen 2023-03-09 10:09:17 +02:00 committed by Greg Kroah-Hartman
parent eff37b5ea3
commit 807fccf719
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/tty/serial/serial_core.c
View File

@ -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))