Re: ohci1394_dma=early crash since 2.6.32 (was Re: [Bug #14487] PANIC: early exception 08 rip 246:10 error ffffffff810251b5 cr2 0)

Justin P. Mattock
2010-02-04T09:48:29Z

On 02/04/10 01:35, Jan Beulich wrote:
>>>> "Justin P. Mattock"<justinmattock-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> 04.02.10 10:17>>>
>> so something is using __native_set_fixmap
>> that's hitting some memory address then
>> set_fixmap_nocache(ohci1394_dma=early)
>> fires off hitting the same?
>
> No, afaict it is the ohci1394_dma=early code itself hitting that path.
>
> Jan
>
>

alright.. looking at init_ohci1394_dma.c
I see:

ohci.registers = (void *)fix_to_virt(FIX_OHCI1394_BASE);

then I think it calls:

set_fixmap_nocache(FIX_OHCI1394_BASE, ohci_base);

I'm guessing somewhere with the fix_to_virt might be something
(but could be wrong);

Justin P. Mattock