linux-kernel - Re: [RFC v2 7/8] drm/fence: add fence timeline to drm

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Date:	Wed, 27 Apr 2016 10:23:11 +0200
From:	Daniel Stone <daniel@...ishbar.org>
To:	Gustavo Padovan <gustavo@...ovan.org>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	devel@...verdev.osuosl.org, Daniel Vetter <daniel.vetter@...ll.ch>,
	Riley Andrews <riandrews@...roid.com>,
	dri-devel <dri-devel@...ts.freedesktop.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Arve Hjønnevåg <arve@...roid.com>,
	Gustavo Padovan <gustavo.padovan@...labora.co.uk>,
	John Harrison <John.C.Harrison@...el.com>
Subject: Re: [RFC v2 7/8] drm/fence: add fence timeline to drm_crtc

Hi,

On 26 April 2016 at 00:33, Gustavo Padovan <gustavo@...ovan.org> wrote:
> +static inline struct drm_crtc *fence_to_crtc(struct fence *fence)
> +{
> +       if (fence->ops != &drm_crtc_fence_ops)
> +               return NULL;

Since this is (currently) only used before unconditional dereferences,
maybe turn this into a BUG_ON instead of return NULL?

Cheers,
Daniel