Re: [PATCH 2/2] ahci: implement workaround for ASUS P5W-DH Deluxe ahci_broken_hardreset()

[Tejun Heo <htejun@gmail.com>]

Tejun Heo wrote:
> P5W-DH Deluxe has ICH9 which doesn't have PMP support but SIMG 4726
> hardwired to the second port of AHCI controller at PCI device 1f.2.
> The 4726 doesn't work as PMP but as a storage processor which can do
> hardware RAID on downstream ports.
> 
> When no device is attached to the downstream port of the 4726, pseudo
> ATA device for configuration appears.  Unfortunately, ATA emulation on
> the device is very lousy and causes long hang during boot.
> 
> This patch implements workaround for the board.  If the mainboard is
> P5W-DH Deluxe (matched using DMI), only hardreset is used on the
> second port of AHCI controller @ 1f.2 and the hardreset doesn't wait
> for the first FIS and just proceed to IDENTIFY.
> 
> This workaround has been verified in bugzilla report 8923.
> 
>   http://bugzilla.kernel.org/show_bug.cgi?id=8923

I take back this series too. :-( It seems P5W-DH workaround can use 
short wait for !BSY and CLO right after hardreset is finished.  I'll 
post an updated version soon.

Thanks.

-- 
tejun