[PATCH] drm: mst: Fix query_payload ack reply struct

[Sean Paul]

On Thu, Aug 29, 2019 at 01:06:58PM -0400, Lyude Paul wrote:
> Is it worth actually CCing stable on this? This patch is certainly correct but
> I don't think we use this struct for anything quite yet.
> 
> Otherwise: Reviewed-by: Lyude Paul <lyude at redhat.com>

Thanks for the review! I've stripped the cc stable tag and pushed to
drm-misc-next. We'll have to keep an eye out for Sasha's stable AI bot, I'm
guessing it'll try to backport this to stable regardless.

Sean

> 
> On Thu, 2019-08-29 at 12:52 -0400, Sean Paul wrote:
> > From: Sean Paul <seanpaul at chromium.org>
> > 
> > Spec says[1] Allocated_PBN is 16 bits
> > 
> > [1]- DisplayPort 1.2 Spec, Section 2.11.9.8, Table 2-98
> > 
> > Fixes: ad7f8a1f9ced ("drm/helper: add Displayport multi-stream helper
> > (v0.6)")
> > Cc: Lyude Paul <lyude at redhat.com>
> > Cc: Todd Previte <tprevite at gmail.com>
> > Cc: Dave Airlie <airlied at redhat.com>
> > Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
> > Cc: Maxime Ripard <maxime.ripard at bootlin.com>
> > Cc: Sean Paul <sean at poorly.run>
> > Cc: David Airlie <airlied at linux.ie>
> > Cc: Daniel Vetter <daniel at ffwll.ch>
> > Cc: dri-devel at lists.freedesktop.org
> > Cc: <stable at vger.kernel.org> # v3.17+
> > Signed-off-by: Sean Paul <seanpaul at chromium.org>
> > ---
> >  include/drm/drm_dp_mst_helper.h | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/include/drm/drm_dp_mst_helper.h
> > b/include/drm/drm_dp_mst_helper.h
> > index 2ba6253ea6d3..fc349204a71b 100644
> > --- a/include/drm/drm_dp_mst_helper.h
> > +++ b/include/drm/drm_dp_mst_helper.h
> > @@ -334,7 +334,7 @@ struct drm_dp_resource_status_notify {
> >  
> >  struct drm_dp_query_payload_ack_reply {
> >  	u8 port_number;
> > -	u8 allocated_pbn;
> > +	u16 allocated_pbn;
> >  };
> >  
> >  struct drm_dp_sideband_msg_req_body {
> -- 
> Cheers,
> 	Lyude Paul
> 

-- 
Sean Paul, Software Engineer, Google / Chromium OS