[Bug 61182] r600g causes KWin crashes with kernel 3.8

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=61182

--- Comment #29 from Marek Olšák <maraeo at gmail.com> ---
r600g crashes because it's mapping a MSAA resource in order to clear the CMASK
to zeros. The problem is MSAA resources occupy a lot of memory and the system
is failing to map the whole resource.

The solution is easy: we should clear the CMASK and HTILE buffers using DMA or
streamout and not with the CPU.

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