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.
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