Serial Port Configuration does not work

[Jilles Tjoelker]

On Tue, Sep 06, 2011 at 04:29:51PM +0400, Boris Samorodov wrote:
> the port does not work as expected (at least as per The Handbook,
> 26.2.5 Serial Port Configuration). Nether "init" nor "lock"
> devices can be used:
> -----
> # uname -a
> FreeBSD host1.ipt.ru 9.0-BETA2 FreeBSD 9.0-BETA2 #14 r225395: Mon Sep  5 18:10:43 MSK 2011     bsam at bb.ipt.ru:/usr/obj/usr/src/sys/HOSTS  i386
> # ls -l /dev/ttyu5*
> crw-------  1 root  wheel    0,  56 Sep  5 18:50 /dev/ttyu5
> crw-------  1 root  wheel    0,  57 Sep  5 18:50 /dev/ttyu5.init
> crw-------  1 root  wheel    0,  58 Sep  5 18:50 /dev/ttyu5.lock
> # stty -f /dev/ttyu5.init 57600
> stty: /dev/ttyu5.lock isn't a terminal
> # stty -f /dev/ttyu5.lock cs7
> stty: /dev/ttyu5.lock isn't a terminal
> -----

It looks like r223722, while introducing the ability to issue
device-specific ioctls on init and lock devices, broke the ability to
issue generic ioctls, with the exception of TIOCSETA. (However, stty
will not do much if it cannot do TIOCGETA.)

Try this patch and report if it works:

diff --git a/sys/kern/tty.c b/sys/kern/tty.c
index ce49f97..3721888 100644
--- a/sys/kern/tty.c
+++ b/sys/kern/tty.c
@@ -777,6 +777,7 @@ ttyil_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag,
 	error = ttydevsw_cioctl(tp, dev2unit(dev), cmd, data, td);
 	if (error != ENOIOCTL)
 		goto done;
+	error = 0;
 
 	switch (cmd) {
 	case TIOCGETA:

-- 
Jilles Tjoelker