[Intel-gfx] drm-next + i915 CVE yolo merge

[Joonas Lahtinen]

Quoting Dave Airlie (2019-11-14 03:33:24)
> The landing of the i915 CVE fixes into Linus tree has created a bit of
> a mess in linux-next and downstream in drm-next trees.
> 
> I talked to Daniel and he had talked to Joonas a bit, and I decided to
> go with what Daniel describes as the YOLO merge, where I just solve it
> and pray, and everyone else verifies/fixes it.
> 
> In my favour I've been reading these patches for a couple of months
> now and applied them to a lot of places, so I'm quite familiar with
> what they are doing.
> 
> The worst culprit was the RC6 ctx corruption fix since the whole of
> rc6 got refactored in next. However I also had access to a version of
> this patch Jon wrote on drm-tip a couple of weeks ago.

We've now tested drm-next and found it working fine. As a next step Jani
will be backmerge to drm-intel-next-queued.

Regards, Joonas

> I took that patch, applied it and fixed it up on top of drm-next. Then
> I backmerged the commit that also went into Linus' tree. Then I
> removed any evidence of the RC6 patch from Linus' tree and left the
> newer version pieces in place. The other stuff mostly merged fine and
> the results looked fine, but I'd definitely think everyone at Intel
> should be staring at it, and my dinq tip resolutions ASAP and
> hopefully it goes into CI and comes out smelling of something good.
> 
> Let me know if it's all horrible asap,
> Thanks,
> Dave.