From: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Wed, 19 Nov 2014 17:38:07 +0000 (+0100)
Subject: drm/atomic: Only destroy connector states with connection mutex held
X-Git-Tag: omap-for-v3.19/fixes-rc1~80^2~45
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6f75cea66c8dd043ced282016b21a639af176642;p=pandora-kernel.git

drm/atomic: Only destroy connector states with connection mutex held

Otherwise the connector might have been unplugged and destroyed while
we didn't look. Yet another fallout from DP MST hotplugging that I
didn't consider.

To make sure we get this right add an appropriate WARN_ON to
drm_atomic_state_clear (obviously only when we actually have a state
to clear up). And reorder all the state_clear and backoff calls to
make it work out properly.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
---

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