Jeff Garzik wrote:
Tejun Heo wrote:
Jeff Garzik wrote:
BTW, Intel sez:
"FYI, I added PIIX_FLAG_IGNORE_PCS and was able to boot on ICH8."
Yeap, that should achieve about the same effect as the experimental
patch Andrew posted; also, about the same phantom bug.
Nod, just sending that to note conclusively that ICH8+PCS is a confirmed
problem case, as confirmed from multiple sources.
I don't think the phantom device problem is caused by missing
dev_select. We have enough dev_select() during classification.
Just a guess. Can I easily reproduce this? I have a bunch of Intel
machines, ICH5/6/7 (no ICH8 yet), of various flavors.
I can reliably reproduce it using ICH7 (ASUS P5LD2). The problem occurs
on both combined and sata-only modes. On my machine, combined mode maps
secondary master and slave to P1 and P3, respectively. And, of course,
SATA only mode maps to PM, PS, SM, SS to P0, P2, P1, P3.
In either mode, occupy the master slot (P0 or P1) with an ATAPI device
(I use PX716-SA) and leave the slave slot (P2 or P3) empty. The
signature of the ATAPI device is duplicated on the empty slave slot. As
noted before, this doesn't occur if the master device is ATA, only the
slave slot is occupied or both are occupied.
--
tejun
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