[PATCH v2] drm/virtio: document drm_dev_set_unique workaround

[Gerd Hoffmann]

On Wed, Oct 24, 2018 at 03:42:52PM +0100, Emil Velikov wrote:
> From: Emil Velikov <emil.velikov at collabora.com>
> 
> A while back we removed it, yet that lead to regressions. At some later
> point, I've attempted to remove it again without fully grasping the
> unique (pun intended) situation that virtio is in.
> 
> Add a bulky comment to document why the call should stay as-is, for the
> next person who's around.
> 
> As a Tl;Dr: virtio sits on top of struct virtio_device, which confuses
> dev_is_pci(), wrong info gets sent to userspace and X doesn't start.
> Driver needs to explicitly call drm_dev_set_unique() to keep it working.
> 
> v2: Fix handful of typos (Laszlo)
> 
> Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
> Cc: Gerd Hoffmann <kraxel at redhat.com>
> Cc: Hans de Goede <hdegoede at redhat.com>
> Cc: Laszlo Ersek <lersek at redhat.com>
> Signed-off-by: Emil Velikov <emil.velikov at collabora.com>
> Reviewed-by: Laszlo Ersek <lersek at redhat.com>

Reviewed-by: Gerd Hoffmann <kraxel at redhat.com>

> Sending it out for posterity-sake. Modulo any objections I'll merge
> this via drm-misc.

Ah, good, leaving merging to you then ;)

cheers,
  Gerd