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If tty that we open already has hpf1275a line discipline set, don't 

spawn new pseudo-device and wskbd instances.

XXX: The logic for exclusive use needs to be thought out better, but
for now this should at least prevent scores of new hpf1275a/wskbd
being attached if you accidentally set this line discipline on your
serial console.
This commit is contained in:
uwe 2006-05-30 01:14:38 +00:00
parent 2cbaed172f
commit bcd4abc305
1 changed files with 7 additions and 2 deletions
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9
sys/dev/hpc/hpf1275a_tty.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: hpf1275a_tty.c,v 1.13 2006/05/29 23:01:08 uwe Exp $ */
/* $NetBSD: hpf1275a_tty.c,v 1.14 2006/05/30 01:14:38 uwe Exp $ */
/*
* Copyright (c) 2004 Valeriy E. Ushakov
@ -28,7 +28,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: hpf1275a_tty.c,v 1.13 2006/05/29 23:01:08 uwe Exp $");
__KERNEL_RCSID(0, "$NetBSD: hpf1275a_tty.c,v 1.14 2006/05/30 01:14:38 uwe Exp $");
#include "opt_wsdisplay_compat.h"
@ -319,6 +319,11 @@ hpf1275a_open(dev_t dev, struct tty *tp)
s = spltty();
if (tp->t_linesw == &hpf1275a_disc) {
splx(s);
return 0;
}
sc = (struct hpf1275a_softc *)config_attach_pseudo(&hpf1275a_cfdata);
if (sc == NULL) {
splx(s);