Mark Lord wrote:
Tejun Heo wrote:
Mark Lord wrote:
..
I've just noticed that, if I unplug/replug the host-side SATA cable
on the Sil3726 PM, and *then* "insmod sata_mv", the PM is not found.
If I then simply do "rmmod sata_mv ; insmod sata_mv", then the PM is
found.
This happens with the original hardreset code from Jeff,
as well as the updated sata_mv code that I've posted earlier.
So it is not anything I've broken (recently :) ).
Very strange.. I wonder if it also happens with the Marvell PM,
except I don't have one here to test with at the moment.
Ever heard of anything strange like that?
IIRC, ICH8 ahci + 4726 fails the initial reset sequence because the
PMP comes up after the hardreset code times out, which triggers
another EH iteration which works out fine. If the problem is caused
by the PMP not responding fast enough, it should cause a hotplug event
afterwards.
..
So I ought to be able to insert (for debug purposes only) a msleep(3000)
at an appropriate location in the code, and suddenly see this problem go
away?
Not for upstream -- the eventual hotplug support in sata_mv is the real solution.
But just to confirm that this is indeed the issue.
..
Heh.. darned near exactly 3 seconds does it, alright.
Okay, I won't fuss over this for now -- it works if the PM is plugged in
at boot (because the BIOS fiddles it first), and it works when warmplugged
so long as sata_mv is unloaded and reloaded.
This will get fixed completely with the hotplug support fixes coming later this week.
Cheers
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