Author: ed
Date: Sun Sep 19 14:21:39 2010
New Revision: 212860
URL: http://svn.freebsd.org/changeset/base/212860
Log:
Ignore DCD handling on /dev/console entirely.
This makes /dev/console more fail-safe and prevents a potential console
lock-up during boot.
Discussed on: stable@
Tested by: koitsu@
MFC after: 1 week
Modified:
head/sys/kern/tty.c
Modified: head/sys/kern/tty.c
==============================================================================
--- head/sys/kern/tty.c Sun Sep 19 13:49:02 2010 (r212859)
+++ head/sys/kern/tty.c Sun Sep 19 14:21:39 2010 (r212860)
@@ -282,7 +282,8 @@ ttydev_open(struct cdev *dev, int oflags
/* Wait for Carrier Detect. */
if (!TTY_CALLOUT(tp, dev) && (oflags & O_NONBLOCK) == 0 &&
- (tp->t_termios.c_cflag & CLOCAL) == 0) {
+ (tp->t_termios.c_cflag & CLOCAL) == 0 &&
+ dev != dev_console) {
while ((ttydevsw_modem(tp, 0, 0) & SER_DCD) == 0) {
error = tty_wait(tp, &tp->t_dcdwait);
if (error != 0)
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