[Bug 422994] Re: sata_via hard resetting link / freeze: exception Emask 0x12 SAct 0x0 SErr 0x1000500 action 0x6

[Cruncher]

Confirming problem with WD20EARS+VIA6421.
Confirming patch is working for me.

@JHF2442 From my understanding the bus keeps resetting because of
incoming data overflow, but there is no data corrupting. Writing data is
not affected (therefore writing is possible at full speed), since the
problem is the WD disk sending too much data when the controller
requests a break (think of it as the fast SATA disk flooding the slow
PCI bus. think DoS attack ;-) )

@JTZ after thinking about your comment, I did remember I had two freezes
under heavy disk access load, resulting in kernel panics (caps
lock+scroll lock flashing). However, in general the problem was only
visible in really slow read transfer rates.

Thanks in advance for inclusion in Lucid updates.

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sata_via hard resetting link / freeze: exception Emask 0x12 SAct 0x0 SErr 0x1000500 action 0x6
https://bugs.launchpad.net/bugs/422994
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