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In scif_rxsoft, bail early if the input buffers have not been initialised yet. 

This can happen if we drop into ddb on the serial console before
scif_attach() has been called.
This commit is contained in:
scw 2003-11-09 12:19:54 +00:00
parent ca17019a08
commit 89a3825de9
1 changed files with 6 additions and 2 deletions
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8
sys/arch/sh5/dev/scif.c
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@ -1,4 +1,4 @@
/* $NetBSD: scif.c,v 1.12 2003/08/07 16:29:30 agc Exp $ */
/* $NetBSD: scif.c,v 1.13 2003/11/09 12:19:54 scw Exp $ */
/*-
* Copyright (C) 1999 T.Horiuchi and SAITOH Masanobu. All rights reserved.
@ -106,7 +106,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: scif.c,v 1.12 2003/08/07 16:29:30 agc Exp $");
__KERNEL_RCSID(0, "$NetBSD: scif.c,v 1.13 2003/11/09 12:19:54 scw Exp $");
#include "opt_kgdb.h"
@ -1075,6 +1075,10 @@ scif_rxsoft(struct scif_softc *sc, struct tty *tp)
end = sc->sc_ebuf;
get = sc->sc_rbget;
if (end == NULL || get == NULL)
return;
scc = cc = scif_rbuf_size - sc->sc_rbavail;
if (cc == scif_rbuf_size) {