From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thierry Reding <thierry.reding@gmail.com>
Subject: Re: [PATCH 06/10] drm/tegra: Handle 64-bit return from
 drm_crtc_vblank_count()
Date: Thu, 15 Feb 2018 13:17:01 +0100
Message-ID: <20180215121701.GA29499@ulmo>
References: <20180203051302.9974-1-dhinakaran.pandiyan@intel.com>
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To: "Pandiyan, Dhinakaran" <dhinakaran.pandiyan@intel.com>
Cc: "intel-gfx@lists.freedesktop.org" <intel-gfx@lists.freedesktop.org>, "treding@nvidia.com" <treding@nvidia.com>, "dri-devel@lists.freedesktop.org" <dri-devel@lists.freedesktop.org>, "Vivi,
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On Wed, Feb 07, 2018 at 01:41:18AM +0000, Pandiyan, Dhinakaran wrote:
> On Fri, 2018-02-02 at 21:12 -0800, Dhinakaran Pandiyan wrote:
> > 570e86963a51 ("drm: Widen vblank count to 64-bits [v3]") changed the
> > return type for drm_crtc_vblank_count() to u64. This could cause
> > potential problems if the return value is used in arithmetic operations
> > with a 32-bit reference HW vblank count. Explicitly typecasting this
> > down to u32 either fixes a potential problem or serves to add clarity in
> > case the implicit typecasting was already correct.
> >=20
> > Cc: Keith Packard <keithp@keithp.com>
> > Cc: Thierry Reding <treding@nvidia.com>
>=20
>=20
> Thierry,=20
>=20
> Can I get an Ack on this please?=20

Acked-by: Thierry Reding <treding@nvidia.com>

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