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

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Date:	Mon, 16 Dec 2013 09:58:58 -0500
From:	Santosh Shilimkar <santosh.shilimkar@...com>
To:	Paul Walmsley <pwalmsley@...dia.com>
CC:	Viresh Kumar <viresh.kumar@...aro.org>,
	<linux-omap@...r.kernel.org>, <cpufreq@...r.kernel.org>,
	<linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] cpufreq: omap: clk_round_rate() can return a zero upon
 error

On Monday 09 December 2013 09:18 PM, 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.
> 
> This patch also removes a bogus usage of IS_ERR_VALUE(), which is intended to be used only on combination pointer/error code return values; a side-benefit.
> 
> Signed-off-by: Paul Walmsley <pwalmsley@...dia.com>
> Cc: Santosh Shilimkar <santosh.shilimkar@...com>
> Cc: Viresh Kumar <viresh.kumar@...aro.org>
> ---
Acked-by: Santosh Shilimkar <santosh.shilimkar@...com>


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