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

On Mon, Dec 23, 2013 at 10:27 AM, Laurent Pinchart laurent.pinchart@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@ideasonboard.com

Thanks

Signed-off-by: Rob Clark robdclark@gmail.com

---

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) {
  

-- 1.8.3.2