From: David Herrmann <dh.herrmann@gmail.com>
Date: Sun, 20 Oct 2013 16:55:45 +0000 (+0200)
Subject: drm: delay minor destruction to drm_dev_free()
X-Git-Tag: v3.13-rc1~76^2~19
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8f6599da8e772fa8de54cdf98e9e03cbaf3946da;p=pandora-kernel.git

drm: delay minor destruction to drm_dev_free()

Instead of freeing minors in drm_dev_unregister(), we only unplug them and
delay the free to drm_dev_free(). Note that if drm_dev_register() has
never been called, minors are NULL and this has no effect.

This change is needed to allow early device unregistration. If we want to
call drm_dev_unregister() on live devices, we need to guarantee that
minors are still valid (but unplugged). This way, any open file can still
access file_priv->minor->dev to get the DRM device. However, the minor is
unplugged so no new users can occur.

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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