Dave - I couldn't find this patch in your git repo at git://people.freedesktop.org/~airlied/linux in the drm-next or drm-fixes branches.
https://patchwork.kernel.org/patch/1379071/
It appears to fix a real problem for Mac users - http://bugs.launchpad.net/bugs/1039157. See https://bugs.launchpad.net/ubuntu/oneiric/+source/linux/+bug/1039157/comment... for confirmation.
I think it should also be 'Cc: stable@vger.kernel.org'. It applies as far back as 2.6.32 with minor context differences.
rtg