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Don't crash when trying to read phone data while there is no ISDN 

connection. From FreeBSD, via Matthias Drochner.
This commit is contained in:
martin 2002-01-27 11:42:13 +00:00
parent b41d81ade2
commit 7942602380
1 changed files with 5 additions and 5 deletions
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10
sys/netisdn/i4b_tel.c
View File

@ -27,7 +27,7 @@
* i4b_tel.c - device driver for ISDN telephony
* --------------------------------------------
*
* $Id: i4b_tel.c,v 1.5 2001/11/13 01:06:23 lukem Exp $
* $Id: i4b_tel.c,v 1.6 2002/01/27 11:42:13 martin Exp $
*
* $FreeBSD$
*
@ -36,7 +36,7 @@
*---------------------------------------------------------------------------*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: i4b_tel.c,v 1.5 2001/11/13 01:06:23 lukem Exp $");
__KERNEL_RCSID(0, "$NetBSD: i4b_tel.c,v 1.6 2002/01/27 11:42:13 martin Exp $");
#include "i4btel.h"
@ -567,9 +567,9 @@ i4btelread(dev_t dev, struct uio *uio, int ioflag)
if(func == FUNCTEL)
{
s = splnet();
while(IF_QEMPTY(sc->isdn_linktab->rx_queue) &&
(sc->devstate & ST_ISOPEN) &&
(sc->devstate & ST_CONNECTED))
while((sc->devstate & ST_ISOPEN) &&
(sc->devstate & ST_CONNECTED) &&
IF_QEMPTY(sc->isdn_linktab->rx_queue))
{
sc->devstate |= ST_RDWAITDATA;