linux-kernel - Re: [PATCH 2.6.19-rc5-mm2] cpufreq: set policy->curfreq on initialization

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Message-ID: <455DBF7E.7060906@reub.net>
Date:	Sat, 18 Nov 2006 00:56:14 +1100
From:	Reuben Farrelly <reuben-linuxkernel@...b.net>
To:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>,
	ego@...ibm.com, Reuben Farrelly <reuben-linuxkernel@...b.net>,
	Andrew Morton <akpm@...l.org>, davej@...hat.com,
	linux-kernel@...r.kernel.org,
	CPUFreq Mailing List <cpufreq@...ts.linux.org.uk>,
	"Sadykov, Denis M" <denis.m.sadykov@...el.com>
Subject: Re: [PATCH 2.6.19-rc5-mm2] cpufreq: set policy->curfreq on initialization



On 16/11/2006 6:05 AM, Mattia Dongili wrote:
> Check the correct variable and set policy->cur upon acpi-cpufreq
> initialization to allow the userspace governor to be used as default.
> 
> Signed-off-by: Mattia Dongili <malattia@...ux.it>
> 
> ---
> 
> Reuben, could you also try if this patch fixes the BUG()?
> Thanks

It does, and all looks fine now, thanks.  Sorry for not getting back about it a 
little earlier.

Reuben


> diff --git a/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
> index 18f4715..a630f94 100644
> --- a/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
> +++ b/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
> @@ -699,14 +699,14 @@ static int acpi_cpufreq_cpu_init(struct
>  	if (result)
>  		goto err_freqfree;
>  
> -	switch (data->cpu_feature) {
> +	switch (perf->control_register.space_id) {
>  	case ACPI_ADR_SPACE_SYSTEM_IO:
>  		/* Current speed is unknown and not detectable by IO port */
>  		policy->cur = acpi_cpufreq_guess_freq(data, policy->cpu);
>  		break;
>  	case ACPI_ADR_SPACE_FIXED_HARDWARE:
>  		acpi_cpufreq_driver.get = get_cur_freq_on_cpu;
> -		get_cur_freq_on_cpu(cpu);
> +		policy->cur = get_cur_freq_on_cpu(cpu);
>  		break;
>  	default:
>  		break;
-
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