Re: ata2: SATA link down (SStatus 611 SControl 300)

[Tejun Heo]

Paul Collins wrote:
> Tejun Heo <htejun@xxxxxxxxx> writes:
>
> > Paul Collins wrote:
> > > I found a setting labelled "SATA Power Management".  It was set to
> > > "Enable".  When I set it to "Disable", 2.6.25-rc9 detected the optical
> > > drive.
> > This can't be something changed between 2.6.24 and 2.6.25-rc9.  Can
> > you please double check that?
>
> I double-checked as follows:
>
> * Verified "SATA Power Management" set to "Enable"
> * Verified optical device present in 2.6.24.3
> * Verified optical device not present in 2.6.25-rc9

Thanks for checking.  Yeah, on the second though, ata_piix as of 
2.6.24.3 doesn't have SCR access at all, so it would have just worked. 
Maybe what's necessary is more refined link onlineness test.  I'll prep 
a patch.

--
tejun
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