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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>