[Nouveau] [Bug 16911] xserver EXA optimization causes nv31 to crash

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=16911





--- Comment #5 from Stuart Bennett <sb476 at cam.ac.uk>  2008-07-30 19:04:15 PST ---
Some things tried as detailed in 
http://people.freedesktop.org/~marcheu/irclogs/nouveau-2008-07-31

Last attempt replacing the width and height defintions/instantiations with:
int width = min(pBox[i].x2 - pBox[i].x1 - tileWidth, tileWidth);
int height = min(pBox[i].y2 - pBox[i].y1 - tileHeight, tileHeight);

fixed the test case, but lead to other problems shortly after -- xorg log with
the arguments to *pExaScr->info->Copy() printed at
http://people.freedesktop.org/~stuart/Xorg.0.log.old-big.txt shows some huge
negative widths and heights being passed, before an endless succession of calls
with height=0.


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