diff options
| author | Theo de Raadt <deraadt@cvs.openbsd.org> | 2006-03-27 06:14:53 +0000 |
|---|---|---|
| committer | Theo de Raadt <deraadt@cvs.openbsd.org> | 2006-03-27 06:14:53 +0000 |
| commit | 85dbe7ca610ea8b756d4a3368612571b4867502a (patch) | |
| tree | ea6978722b991ba194e4bdbae8c4efb59f390ac9 /sys/dev/ic/com.c | |
| parent | 49f8748d61e452bb0962f8dbd1955014431e975c (diff) | |
in detach, mark device with COM_SW_DEAD, so that close() will not go
tapping additional registes. allows it to work on macppc, where doing
such a tap after unplug is very bad. drahn helped fkr@bytemine.de
ok miod and drahn
Diffstat (limited to 'sys/dev/ic/com.c')
| -rw-r--r-- | sys/dev/ic/com.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/sys/dev/ic/com.c b/sys/dev/ic/com.c index 2314b4205ac..cd245649229 100644 --- a/sys/dev/ic/com.c +++ b/sys/dev/ic/com.c @@ -1,4 +1,4 @@ -/* $OpenBSD: com.c,v 1.109 2006/01/01 11:59:40 miod Exp $ */ +/* $OpenBSD: com.c,v 1.110 2006/03/27 06:14:52 deraadt Exp $ */ /* $NetBSD: com.c,v 1.82.4.1 1996/06/02 09:08:00 mrg Exp $ */ /* @@ -207,6 +207,8 @@ com_detach(self, flags) struct com_softc *sc = (struct com_softc *)self; int maj, mn; + sc->sc_swflags |= COM_SW_DEAD; + /* locate the major number */ for (maj = 0; maj < nchrdev; maj++) if (cdevsw[maj].d_open == comopen) @@ -501,6 +503,9 @@ comclose(dev, flag, mode, p) return 0; #endif + if(sc->sc_swflags & COM_SW_DEAD) + return 0; + (*linesw[tp->t_line].l_close)(tp, flag); s = spltty(); if (ISSET(tp->t_state, TS_WOPEN)) { |