Merge branch 'msm-fixes-3.12' of git://people.freedesktop.org/~robclark/linux into...

A couple small msm fixes.  Plus drop of set_need_resched().

* 'msm-fixes-3.12' of git://people.freedesktop.org/~robclark/linux:
  drm/msm: drop unnecessary set_need_resched()
  drm/msm: fix potential NULL pointer dereference
  drm/msm: workaround for missing irq
  drm/msm: return -EBUSY if bo still active
  drm/msm: fix return value check in ERR_PTR()
  drm/msm: fix cmdstream size check
  drm/msm: hangcheck harder
  drm/msm: handle read vs write fences