Re: [PATCH v9 06/10] ata: zpodd: check zero power ready status

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Hello,

On Wed, Dec 26, 2012 at 09:42:14AM +0800, Aaron Lu wrote:
> > This is really a round-about way to find out the matching device and
> > it wouldn't work if the disk device nests deeper.  Doesn't really look
> > like a good idea to me.
> 
> I don't quite understand the 'disk device nests deeper' case, can you
> please elaborate? My understanding is, as long as the disk's part0
> device has a parent, this function should work. For LLDs want to take

Hmmm, maybe I misread but it looked like it wouldn't work if there are
intermediate nodes between the parent device and part0.  It might not
happen for sata but I don't think it's a good idea to assume that the
part0 and hardware device are connected directly.

In general, it's a quite roundabout way to do it.  Let's just push it
through SCSI.  That's how everything else is routed after all.  It's
confusing to do this one differently.

Thanks.

-- 
tejun
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