[Intel-gfx] Linus, please revert 7dc8f11437: regression in 5.7-rc0, hangs while attempting to run X

[Pavel Machek]

On Fri 2020-04-03 15:00:31, Pavel Machek wrote:
> Hi!
> 
> 7dc8f1143778a35b190f9413f228b3cf28f67f8d
> 
>     drm/i915/gem: Drop relocation slowpath
>     
>     Since the relocations are no longer performed under a global
>     struct_mutex, or any other lock, that is also held by pagefault handlers,
>     we can relax and allow our fast path to take a fault. As we no longer
>     need to abort the fast path for lock avoidance, we no longer need the
>     slow path handling at all.
> 
> causes regression on thinkpad x220: instead of starting X, I'm looking
> at blinking cursor.
> 
> Reverting the patch on too of 919dce24701f7b3 fixes things for me.

I have received no feedback from patch authors, and I believe we don't
want to break boot in -rc1 on Intel hardware... so the commit should
be simply reverted.

Best regards,
								Pavel

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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