From: Rob Clark <robdclark@gmail.com>
Date: Mon, 26 Jan 2015 15:11:08 +0000 (-0500)
Subject: drm: fix fb-helper vs MST dangling connector ptrs (v2)
X-Git-Tag: fixes-v4.0-rc1~225^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2148f18fdb45f31ca269a7787fbc24053cd42e70;p=pandora-kernel.git

drm: fix fb-helper vs MST dangling connector ptrs (v2)

VT switch back/forth from console to xserver (for example) has potential
to go horribly wrong if a dynamic DP MST connector ends up in the saved
modeset that is restored when switching back to fbcon.

When removing a dynamic connector, don't forget to clean up the saved
state.

v1: original
v2: null out set->fb if no more connectors to avoid making i915 cranky

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1184968
Cc: stable@vger.kernel.org #v3.17+
Signed-off-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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