[PATCH] Revert "drm/virtio: drop prime import/export callbacks"

[Emil Velikov]

On Fri, 19 Apr 2019 at 16:57, Marc-André Lureau
<marcandre.lureau at redhat.com> wrote:
>
> This patch does more harm than good, as it breaks both Xwayland and
> gnome-shell with X11.
>
> Xwayland requires DRI3 & DRI3 requires PRIME.
>
> X11 crash for obscure double-free reason which are hard to debug
> (starting X11 by hand doesn't trigger the crash).
>
> I don't see an apparent problem implementing those stub prime
> functions, they may return an error at run-time, and it seems to be
> handled fine by GNOME at least.
>
> Please consider a revert.
>
> This reverts commit b318e3ff7ca065d6b107e424c85a63d7a6798a69.
>
> Cc: Gerd Hoffmann <kraxel at redhat.com>
> Cc: Dave Airlie <airlied at redhat.com>
> Signed-off-by: Marc-André Lureau <marcandre.lureau at redhat.com>

The DRI3 code extensively uses prime_handle_to_fd and
prime_fd_to_handle for self-import.

Fwiw the patch is:
Reviewed-by: Emil Velikov <emil.velikov at collabora.com>

-Emil