From owner-freebsd-current  Mon Oct 11  3:44: 6 1999
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From: Soren Schmidt <sos@freebsd.dk>
Message-Id: <199910111043.MAA36975@freebsd.dk>
Subject: Re: ATA related panic
In-Reply-To: <3801B89C.5DDD29D9@altavista.net> from Maxim Sobolev at "Oct 11, 1999 01:14:53 pm"
To: sobomax@altavista.net
Date: Mon, 11 Oct 1999 12:43:53 +0200 (CEST)
Cc: current@FreeBSD.ORG
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It seems Maxim Sobolev wrote:
> It seems that ATA is broken - it paniced when kernel is booting. Following is
> diagnostic output:
> 
> isa0: <ISA bus> on motherboard
> pccard0: <PC Card bus -- KLUDGE version> on motherboard
> 
> Fatal trap 12: page fault while in kernel mode
> fault virtual address    = 0xc
> fault code                  = supervisor read, page not present
> instruction pointer      = 0x8:0xc01ca927
> stack pointer              = 0x10:0xc032fe14
> frame pointer              = 0x10:0xc032fe28
> code segment             = base 0x0, limit 0xfffff, type 0x1b
>                                   = DPL 0, pres 1, def32 1, gran 1
> processor eflags          = interrupt enabled, resume, IOPL = 0
> current process           = 0 (swapper)
> interrupt mask            = net tty bio cam
> trap number                = 12
> panic: page fault

Oops, try this patch:

Index: ata-all.c
===================================================================
RCS file: /home/ncvs/src/sys/dev/ata/ata-all.c,v
retrieving revision 1.25
diff -u -r1.25 ata-all.c
--- ata-all.c   1999/10/10 18:08:36     1.25
+++ ata-all.c   1999/10/11 10:42:36
@@ -115,7 +115,7 @@
 
     /* check if allready in use by a PCI device */
     for (ctlr = 0; ctlr < atanlun; ctlr++) {
-       if (atadevices[ctlr]->ioaddr == rman_get_start(port)) {
+       if (atadevices[ctlr] && atadevices[ctlr]->ioaddr==rman_get_start(port)){
            printf("ata-isa%d: already registered as ata%d\n", 
                   device_get_unit(dev), ctlr);
            bus_release_resource(dev, SYS_RES_IOPORT, 0, port);

-Soren


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