[PATCH] drm/omap: Don't dereference list head when the connectors list is empty

[Laurent Pinchart]

Hi Rob,

On Monday 23 December 2013 13:04:15 Rob Clark wrote:
> On Mon, Dec 23, 2013 at 10:27 AM, Laurent Pinchart
> 
> <laurent.pinchart at ideasonboard.com> wrote:
> > The connectors list iterator returns the list head when the list is
> > empty. Fix it by returning NULL in that case.
> > 
> > Signed-off-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
> 
> Thanks
> 
> Signed-off-by: Rob Clark <robdclark at gmail.com>

Thank you. Could you please take this in your tree, or make sure that Dave 
picks the patch from the list ?

> > ---
> > 
> >  drivers/gpu/drm/omapdrm/omap_fb.c | 5 ++++-
> >  1 file changed, 4 insertions(+), 1 deletion(-)
> > 
> > diff --git a/drivers/gpu/drm/omapdrm/omap_fb.c
> > b/drivers/gpu/drm/omapdrm/omap_fb.c index f2b8f06..1b48cf2 100644
> > --- a/drivers/gpu/drm/omapdrm/omap_fb.c
> > +++ b/drivers/gpu/drm/omapdrm/omap_fb.c
> > @@ -301,8 +301,11 @@ struct drm_connector
> > *omap_framebuffer_get_next_connector(> 
> >         struct list_head *connector_list =
> >         &dev->mode_config.connector_list;
> >         struct drm_connector *connector = from;
> > 
> > -       if (!from)
> > +       if (!from) {
> > +               if (list_empty(connector_list))
> > +                       return NULL;
> >                 return list_first_entry(connector_list, typeof(*from),
> >                 head);
> > +       }
> > 
> >         list_for_each_entry_from(connector, connector_list, head) {
> >                 if (connector != from) {
-- 
Regards,

Laurent Pinchart