Device Reset on Nvidia GPUs

[Gordan Bobic <gordan@bobich.net>]

 I've noticed that nouveau driver has a sysfs reset implemented
 (although I'm not sure whether it is just a stub or whether it
 does anything).

 Now, I fully understand that this is not actually necessary,
 based purely on empirical evidence:

 My ATI cards reliably crash the host when the domU the are passed
 to is rebooted, and the xen-pciback driver does have the sysfs
 reset implemented for ATI cards.

 OTOH, my (modified) Nvidia cards handle domU reboots perfectly
 and the xen-pciback driver has no sysfs reset implementation
 for those.

 So I'm kind of torn between:
 1) It's not broken so don't even think about trying to fix it.
 2) Since FOSS reset implementation seems to exist, it might be
 handy to port it into the xen-pciback feature list (caveat:
 this may impact 1), which would be embarrasing).

 Thoughts?

 Gordan