Re: [PATCH 0/2] fix libata-sff and pata_cmd64x to not crash on boot on parisc

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On Wed, 20 Apr 2011 01:22:54 +0400
Sergei Shtylyov <sshtylyov@xxxxxxxxxx> wrote:

> On 20-04-2011 1:19, Alan Cox wrote:
> 
> >>> We can detect the Mobility electronics split bridges at least (and I
> >>> suspect they are the only 'common' CMD64x hot plug device indeed possibly
> >>> the only one) because the parent bridge of the CMD64x will have a PCI
> >>> vendor id of 0x14f2 and a device id 0x0001, 0x0002, or 0x0120.
> 
> >>      What's the issue with these brodges anyway? Why the enable bits are not
> >> valid for them?
> 
> > Good question. I'd assumed because they are hotplugged and so no firmware
> > gets to set the bits properly ?
> 
>     The bits are strapped off the pins JP3/JP4.

Beats me then. Whatever - its easy enough to work around and avoid
exploding parisc and sparc so it definitely wants sorting
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