Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Disable the device if we fail to open and nobody else has the device open.

Browse Source 
(Thanks Charles and Marc for your advices).
This commit is contained in:
enami 1998-02-22 05:09:58 +00:00
parent 11b3fea04a
commit e12f85fbc1
1 changed files with 31 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
sys/dev/ic/com.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: com.c,v 1.138 1998/02/22 03:24:58 mycroft Exp $ */
/* $NetBSD: com.c,v 1.139 1998/02/22 05:09:58 enami Exp $ */
/*-
* Copyright (c) 1993, 1994, 1995, 1996, 1997
@ -706,30 +706,43 @@ comopen(dev, flag, mode, p)
!ISSET(tp->t_cflag, CLOCAL | MDMBUF)) {
error = ttysleep(tp, &tp->t_rawq, TTIPRI | PCATCH,
ttopen, 0);
if (error) {
/*
* If the open was interrupted and nobody
* else has the device open, then hang up.
*/
if (!ISSET(tp->t_state, TS_ISOPEN)) {
s2 = splserial();
/* Hang up. */
com_modem(sc, 0);
CLR(tp->t_state, TS_WOPEN);
ttwakeup(tp);
splx(s2);
}
if (error)
break;
}
SET(tp->t_state, TS_WOPEN);
}
splx(s);
if (error == 0)
error = (*linesw[tp->t_line].l_open)(dev, tp);
if (error)
if (!ISSET(tp->t_state, TS_ISOPEN)) {
s = splserial();
/*
* When we're doing a blocking open,
* if the open was interrupted and nobody
* else has the device open, then hang up.
*/
if (!ISSET(flag, O_NONBLOCK))
/* Hang up. */
com_modem(sc, 0);
/*
* If the device is enabled but finally failed to
* open and nobody else has it open, disable it.
*/
if (sc->disable != NULL)
if (sc->enabled != 0) {
(*sc->disable)(sc);
sc->enabled = 0;
}
if (!ISSET(flag, O_NONBLOCK)) {
CLR(tp->t_state, TS_WOPEN);
ttwakeup(tp);
}
splx(s);
}
return (error);
}