Re: Booting 2.5.67-ac1 makes the kernel panic

[Christian Staudenmayer]

Hello,

for future reference, i can verify that the method described by Andries
Brouwer below worked fine, i can now boot 2.5.67-ac2 on my machine
using the aic7xxx driver for an old adaptec 2940 scsi controller.

Many thanks Andries!

Greetings, Christian Staudenmayer

--- Andries Brouwer <[e-mail]> wrote:
> On Fri, Apr 18, 2003 at 03:34:23PM -0700, Christian Staudenmayer wrote:
> 
> > (sorry for posting this again, but the kind solution given
> > by Patrick Mansfield turn out to be no solution at all.
> > Thanks anyways :)
> > 
> > i recently compiled 2.5.67-ac1 on my machine which uses the
> > aic7xxx driver for an old adaptec 2940 scsi controller.
> > When booting, the kernel panics after loading the scsi driver
> > with the following message:
> > 
> > Process swapper (pid: 1, threadinfo=dbf8e000 task=dbf8c040)
> > Stack: c15259a8 c15259a8 00000001 00000002 dbf8fe48 c022cd1a c15259a8 000000ff
> >        dbf8fe3c dbf8fe40
> > Call Trace:
> >  [<c022cd1a>] ide_xlate_1024+0x106/0x18c
> >  [<c01654aa>] handle_ide_mess+0x14e/0x1e8
> 
> You have a SCSI disk, read its partitions, look whether
> special disk manager or geometry translations are required
> and crash.
> 
> Why? Of course Alan should have removed this ide_mess :-),
> but I suppose Al is the culprit that broke ide_xlate_1024
> converting it to bdev.
> 
> The code
> 
> int ide_xlate_1024 (struct block_device *bdev, int xparm, int ptheads, const char *msg)
> {
>         ide_drive_t *drive = bdev->bd_disk->private_data;
> 
> is just broken - there is no guarantee that bdev is an IDE disk,
> and casting some private pointer to ide_drive_t and then
> accessing fields must be unhealthy.
> 
> Try replacing the body of ide_xlate_1024 by just
> 
> 	return 0;
> 
> Andries
> 

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