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

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Message-ID: <CAKohpo=8ejsO4ZSp6yPiV9P1VjFJQKT329SR3vqGM8AaYsbHLw@mail.gmail.com>
Date:	Mon, 16 Dec 2013 14:44:36 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Paul Walmsley <pwalmsley@...dia.com>
Cc:	Santosh Shilimkar <santosh.shilimkar@...com>,
	linux-omap@...r.kernel.org,
	"cpufreq@...r.kernel.org" <cpufreq@...r.kernel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] cpufreq: omap: clk_round_rate() can return a zero upon error

On 10 December 2013 07:48, Paul Walmsley <pwalmsley@...dia.com> 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: Viresh Kumar <viresh.kumar@...aro.org>
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