[Intel-gfx] [CI 3/3] drm/i915/fbdev: Flush mode configuration before lastclose

[Chris Wilson]

On Tue, Jun 21, 2016 at 09:16:55AM +0100, Chris Wilson wrote:
> During lastclose, we call intel_fbdev_restore_mode() to switch back to
> the fbcon configuration on return to VT. However, if we have not yet
> finished the asynchronous fbdev initialisation, the current mode will be
> invalid and trigger WARNs upon application.
> 
> Serialise with the outstanding initialisation if the first application
> exits quickly. Note that to hit this in practice requires using an
> unregistered async_domain as otherwise modprobe will force a full
> synchronisation prior to init() completing.
> 
> v2: Reuse comment explaining the +1 by refactoring the wait on fbdev
> sync in the previous patch.
> 
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
> Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>

Don't forget the tags again...

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=93580
Reported-by: Gustav Fägerlind <gustav.fagerlind at gmail.com>
Reported-by: "Li, Weinan Z" <weinan.z.li at intel.com>
Cc: stable at vger.kernel.org

-- 
Chris Wilson, Intel Open Source Technology Centre