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SubjectRe: sata_nv + ADMA + Samsung disk problem
Allen Martin wrote:
>
>>> Dunno about the NVidia version.
>> Theirs works rather differently - the GO bit is there, but there's
>> another append register which is used to tell the controller
>> that a new
>> tag has been added to the CPB list.
>>
>> The only thing we currently use the GO bit for is to switch
>> between ADMA
>> and port register mode. Could be there's something we need to
>> do there,
>> though, who knows..
>>
>
> You shouldn't ever need to touch GO other than the ADMA / legacy mode
> switch as you say.
>
> The NVIDIA ADMA hw is not based on the Pacific Digital core.

Gabor, I just noticed you said that it worked OK in 2.6.20, yet 2.6.22
fails. 2.6.20 had ADMA support as well, so I wonder what change started
causing the problem. Would it be possible for you to do a git bisect (or
at least try 2.6.21 to try and narrow it down)?


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