linux-kernel - Re: [PATCH] gpu: host1x: clk_round_rate() can return a zero upon error

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Date:	Thu, 12 Dec 2013 12:03:44 +0100
From:	Thierry Reding <thierry.reding@...il.com>
To:	Paul Walmsley <pwalmsley@...dia.com>
Cc:	Mikko Perttunen <mperttunen@...dia.com>,
	Arto Merilainen <amerilainen@...dia.com>,
	Terje Bergström <tbergstrom@...dia.com>,
	linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
	dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH] gpu: host1x: clk_round_rate() can return a zero upon
 error

On Mon, Dec 09, 2013 at 06:00:12PM -0800, Paul Walmsley wrote:
> 
> Treat both negative and zero return values from clk_round_rate() as
> errors.  This is needed since subsequent patches will convert
> clk_round_rate()'s return value to be an unsigned type, rather than a
> signed type, since some clock sources can generate rates higher than
> (2^31)-1 Hz.
> 
> Eventually, when calling clk_round_rate(), only a return value of zero
> will be considered a error.  All other values will be considered valid
> rates.  The comparison against values less than 0 is kept to preserve
> the correct behavior in the meantime.
> 
> Signed-off-by: Paul Walmsley <pwalmsley@...dia.com>
> Cc: Mikko Perttunen <mperttunen@...dia.com>
> Cc: Arto Merilainen <amerilainen@...dia.com>
> Cc: Thierry Reding <thierry.reding@...il.com>
> Cc: Terje Bergström <tbergstrom@...dia.com>
> ---
> Applies on v3.13-rc3.  See also:
> 
> http://marc.info/?l=linux-arm-kernel&m=138542591313620&w=2
> 
>  drivers/gpu/drm/tegra/hdmi.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Applied, thanks.

Thierry

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