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SubjectRe: [PATCH] cpufreq: cpufreq-cpu0: clk_round_rate() can return a zero upon error
On Tuesday 26 November 2013 07:31 AM, 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 <paul@pwsan.com>
> Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> Cc: Viresh Kumar <viresh.kumar@linaro.org>
> Cc: Mike Turquette <mturquette@linaro.org>
> ---
> Applies on v3.13-rc1. See also:
>
> http://marc.info/?l=linux-arm-kernel&m=138542591313620&w=2
>
> drivers/cpufreq/cpufreq-cpu0.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/cpufreq/cpufreq-cpu0.c b/drivers/cpufreq/cpufreq-cpu0.c
> index d4585ce2346c..0faf756f6197 100644
> --- a/drivers/cpufreq/cpufreq-cpu0.c
> +++ b/drivers/cpufreq/cpufreq-cpu0.c
> @@ -44,7 +44,7 @@ static int cpu0_set_target(struct cpufreq_policy *policy,
> unsigned int index)
> int ret;
>
> freq_Hz = clk_round_rate(cpu_clk, freq_table[index].frequency * 1000);
> - if (freq_Hz < 0)
> + if (freq_Hz <= 0)
> freq_Hz = freq_table[index].frequency * 1000;
>
> freq_exact = freq_Hz;

So, we will see another patch where you will do: s/<=/== ??
I am wondering if there is any other way we can get this solved, i.e. in a
single patchset.

Otherwise, for both SPEAr and cpu0 patches:

Acked-by: Viresh Kumar <viresh.kumar@linaro.org>


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