[Bug 70204] [hsw] X server crash while scrolling in firefox

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70204

Chris Wilson <chris at chris-wilson.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |RESOLVED
         Resolution|---                         |FIXED

--- Comment #6 from Chris Wilson <chris at chris-wilson.co.uk> ---
Well, that wasn't the bug I was expecting to find. The change in code uncovered
a much more serious pre-existing bug. This should fix it:

commit 06a8ad9690590a605b1564012d062b98c60546a6
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Mon Oct 7 23:21:38 2013 +0100

    sna/trapezoids: Recompute num_threads to match range

    We need to be careful not to execute threads past the end of the alloted
    buffer by making sure the clip extents correctly align.

    Reported-by: Joseph Yasi <joe.yasi at gmail.com>
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=70204
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

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