[PATCH] dri2: avoid crash with old dri drivers.

Keith Packard keithp at keithp.com
Mon Jun 21 11:25:47 PDT 2010

On Mon, 21 Jun 2010 14:08:50 +1000, Dave Airlie <airlied at gmail.com> wrote:

> I built latest server and copied over a mesa 7.8 dri2 driver to use with it,
> and it crashed in here starting compiz. Looks like we need to validate the
> flush extension is registered before calling invalidate.

This is the only place screen->flush is used without checking to see if
it has been set.

keith.packard at intel.com
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