Date: Tue, 16 Sep 2003 12:25:31 -0700 (PDT) From: Nate Lawson <nate@root.org> To: Andrew Thompson <andy@fud.org.nz> Cc: current@freebsd.org Subject: Re: ACPI and a Toshiba Tecra 8000 Message-ID: <20030916122442.D9796@root.org> In-Reply-To: <3F6763D3.8010007@fud.org.nz> References: <20030916115255.A9706@root.org> <3F6763D3.8010007@fud.org.nz>
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On Wed, 17 Sep 2003, Andrew Thompson wrote: > Nate Lawson wrote: > > gdb kernel.debug > > l *scsuspend+0x17 > >That should show the offending code segment. > > (gdb) l *scsuspend+0x17 > 0xc03d7b17 is in scsuspend (/usr/src/sys/isa/syscons_isa.c:111). > 106 int retry = 10; > 107 static int dummy; > 108 sc_softc_t *sc; > 109 > 110 sc = &main_softc; > 111 sc_cur_scr = sc->cur_scp->index; > 112 > 113 if (sc_no_suspend_vtswitch) > 114 return (0); > 115 Ok, this shows it's not ok to unconditionally deref sc->cur_scp. Now I'll look for what cases it is NULL. I'll get back to you in a day or so. -Nate
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