Re: sata dvdroms fails to be recognized by MCP55 controller withthe 2.6.26.5 kernel

[Tejun Heo]

(restoring lkml and linux-ide.  please don't drop cc list)

Tejun Heo wrote:
> Hello,
> 
> gettinther wrote:
>> 00:05.2 IDE interface: GeForce 8800 GT 512 MCP55 SATA Controller (rev
>> a2) (prog-if 85 [Master SecO PriO])
> 
> Ah.. okay.  MCP55.  I've missed that part in the first message.
> sata_nv is a bit messed up for 2.6.26.  What happened was...
> 
> * During 2.6.26-rc, libata switched to prefer hardreset over softreset
>   for various reasons.
> 
> * After 2.6.26 release, sata_nv generic flavors (MCP55/66) were
>   reported to have problems probing devices with hardreset.  Hardreset
>   simply doesn't work.
> 
> * Patch posted to disable hardreset for generic but it accidentally
>   disabled hardreset for all flavors (generic/nf2/3/ck804).
> 
> * Which broke ck804.
> 
> * Another patch posted to reinstate hardreset for nf2/3 and ck804.
> 
> * It somehow mysteriously broke nf2/3.  This is still being
>   investigated.
> 
> Sorry about the mess but I am puzzled too.  I'll report back when I
> know more.
> 
> Thanks.
> 


-- 
tejun
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