[Bug 66990] [sna ivb] corruption with chromium

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=66990

--- Comment #18 from Chris Wilson <chris at chris-wilson.co.uk> ---
Spotted something that looks like it would be hit by Chromium from time to
time:

commit c9d89499806779cd6c62d5d6d34df76279cc5abd
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Mon Jul 29 11:51:39 2013 +0100

    sna: Composite region is already in dst drawable space

    So do not offset it again when processing the fallback composite
    operation.

    Regression from commit 6921abd81017c9ed7f3b2413784068fbc609a0ea
    Author: Chris Wilson <chris at chris-wilson.co.uk>
    Date:   Thu Jul 18 16:21:27 2013 +0100

        sna: Add a fast path for the most common fallback for CPU-CPU blits

    References: https://bugs.freedesktop.org/show_bug.cgi?id=66990
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

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