https://bugs.freedesktop.org/show_bug.cgi?id=91268

--- Comment #10 from Kajzer <kap3tan@gmail.com> ---
(In reply to Michel Dänzer from comment #9)
> That's expected. Alex's patch isn't a fix but just to confirm the problem is
> really directly related to write-combined CPU mappings.

Yeah I know, that's what I really asked for, a way to disable that commit.
I can confirm now that indeed there's some bug in that commit (with R6xx chips)
I had no hangs with mappings disabled.
I'm willing to test potential fixes.

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