On Thu, Jan 28, 2016 at 12:06:46PM +0300, Dan Carpenter wrote:
> We dereference "eaction->event" inside the call to drm_send_event_locked()
> so should hold off on setting it to NULL until afterward.
>
> Fixes: fb740cf2492c ("drm: Create drm_send_event helpers")
> Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>
Oh dear that's embarassing. Thanks for the patch, applied.
-Daniel
>
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_fence.c
> b/drivers/gpu/drm/vmwgfx/vmwgfx_fence.c
> index e0edf14..37c305b 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_fence.c
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_fence.c
> @@ -880,8 +880,8 @@ static void vmw_event_fence_action_seq_passed(struct
> vmw_fence_action *action)
> }
>
> list_del_init(&eaction->fpriv_head);
> - eaction->event = NULL;
> drm_send_event_locked(dev, eaction->event);
> + eaction->event = NULL;
> spin_unlock_irqrestore(&dev->event_lock, irq_flags);
> }
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
