(Please answer to directly to my email too. Thanks!)
Hello List,
some people had problems with
Intel IDE Chips on 845E Boards. ( "resource collisions" )
Yesterday I had the same problem.
Alan Cox said:
> If you look with lspci -v you will find your BIOS has mismapped or
> forgotten to map some of the control register space for that device.
>
> Alan
IMHO there must be a bios bug (latest rev.), because the io resources are left
unassigned. But why does the kernel not fix it?
After reading many questions and no answers, I looked into the kernel source.
I found this block in arch/i386/kernel/pci-i386.c:
==================
/*
* Don't touch IDE controllers and I/O ports of video cards!
*/
if ((class == PCI_CLASS_STORAGE_IDE && idx < 4) ||
(class == PCI_CLASS_DISPLAY_VGA && (r->flags & IORESOURCE_IO)))
continue;
====================
lspci shows indeed the first 4 resources unassigned.
To work around the problem I inserted these lines:
(just before the above block)
========================
/* HACK
* Reinhard Moosauer, 2002-07-25
*/
if ((class == PCI_CLASS_STORAGE_IDE && idx < 4) &&
(!r->start && r->end)) {
printk(KERN_ERR "HACK: INTEL IDE Workaround for"
" %s Resource %d\n", dev->slot_name, idx);
/* I ACCEPT NO RESPOSIBILITY FOR ANY DAMAGE */
pci_assign_resource(dev, idx);
}
==========================
It really works.
As I saw on the list, many other people had the same problem
so I thought, the gurus should take a look at this.
Note1: Please do not use this before anybody gave an OK to it!
I am just playing sorcerer's apprentice.
Note2: You need a patch for kernels before 2.4.19 or so to use the new Intel
Chipsets (when he says "unknown device 0x24cb" or so) . I have one for
2.4.18.
I hope, this helps someone.
Kind regards,
Reinhard
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This archive was generated by hypermail 2b29 : Tue Jul 30 2002 - 14:00:20 EST