Re: [PATCH 4/5] sata_mv new mv_sata_hardreset handler

Tejun Heo wrote:
> Mark Lord wrote:
>> Mmm.. I still need a way to handle access to the port-multiplier 
>> registers.
>> We never did resolve that one fully on the earlier pass.
> 
> Yeah, I thought about that during the API change.  I think we should one 
> of the following two.
> 
> 1. Separate out actual reset part from ata_sff_softreset() and use it in 
> sata_mv so that sata_mv can do...
> 
> mv_srst()
> {
>     check onlineness;
>     set up PMP reg;
>     return ata_sff_do_softreset();
> }
> 
> 2. Move link onlineness test before softreset into EH.  It's common to 
> all drivers anyway.  This will allow mv to do.
..

Can we get just this part upstream Real Soon Now?
The sata_mv pmp stuff is ready to go, except for this one issue.

Thanks

> mv_srst()
> {
>     set up PMP reg;
>     return ata_sff_softreset();
> }
> 
> I like #2 better but there can be exotic cases where link onlineness 
> can't be tested before the link is actually reset.  I don't think it 
> will really matter because hardreset is present and preferred if link 
> onlineness test is valid && hardreset doesn't care about link onlineness.
..

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