[Intel-gfx] [RESEND] [PATCH 0/4] Important MST fixes for 4.6

[Lyude]

Unfortunately we've never really made use of creating/destroying connectors on
the fly like we have with MST, so 4.6 ended up showing a lot of various bugs
with hotplugging MST displays, booting with MST displays, etc. Most of these
bugs are very likely to panic the kernel, and a couple of them end up even
doing out of bounds memory accesses causing all sorts of other issues. This
being said; we currently have a much better solution that makes a few of these
patches unneccessary: dave's connector reference counting patch series[1]. For
the time being however, this is the most minimal patchset I could come up with
for 4.6 to work around all of these issues.

[1]: b164d31f50b2923a7a92c2a40cb46973a6ba8c36 in drm-next

Lyude (4):
  drm/i915/fbdev: Fix num_connector references in
    intel_fb_initial_config()
  drm/fb_helper: Fix references to dev->mode_config.num_connector
  drm/i915: Discard previous atomic state on resume if connectors change
  drm/atomic: Verify connector->funcs != NULL when clearing states

 drivers/gpu/drm/drm_atomic.c         |  3 ++-
 drivers/gpu/drm/drm_fb_helper.c      |  4 ++--
 drivers/gpu/drm/i915/intel_display.c | 12 ++++++++++++
 drivers/gpu/drm/i915/intel_fbdev.c   |  6 +++---
 4 files changed, 19 insertions(+), 6 deletions(-)

This hasn't been sent to stable at vger.kernel.org yet, just sending this to
intel-gfx for review beforehand.

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2.5.5