From: Dave Airlie <airlied@redhat.com>
Date: Tue, 5 Aug 2014 00:40:20 +0000 (+1000)
Subject: drm/i915: lock around link status and link training.
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~125^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5b215bcff50d549d73e43c09bcccf8eebcc95bac;p=pandora-kernel.git

drm/i915: lock around link status and link training.

We need to take the connection mutex around the link status
check for non-MST case, but also around the MST link training
on short HPDs.

I suspect we actually should have a dpcd lock in the future as
well, that just lock the local copies of dpcd and flags stored
from that.

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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