linux-kernel - Re: [PATCH v4 4/6] ARM: rockchip: add basic smp support for rk3288

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Message-ID: <543D9A8F.3040304@rock-chips.com>
Date:	Tue, 14 Oct 2014 14:50:07 -0700
From:	Kever Yang <kever.yang@...k-chips.com>
To:	Heiko Stübner <heiko@...ech.de>,
	Doug Anderson <dianders@...omium.org>
CC:	Sonny Rao <sonnyrao@...omium.org>,
	Addy Ke <addy.ke@...k-chips.com>,
	Eddie Cai <cf@...k-chips.com>, Jianqun Xu <xjq@...k-chips.com>,
	han jiang <hj@...k-chips.com>,
	Tao Huang <huangtao@...k-chips.com>,
	linux-rockchip@...ts.infradead.org,
	Russell King <linux@....linux.org.uk>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 4/6] ARM: rockchip: add basic smp support for rk3288

Heiko,

On 10/14/2014 02:23 PM, Heiko Stübner wrote:
> Am Dienstag, 14. Oktober 2014, 13:24:03 schrieb Doug Anderson:
>> Kever,
>>
>> On Mon, Oct 13, 2014 at 1:12 PM, Kever Yang <kever.yang@...k-chips.com>
> wrote:
>>> +       /*
>>> +        * We need to soft reset the cpu when we turn off the cpu power
>>> domain, +        * or else the active processors might be stalled when
>>> the individual +        * processor is powered down.
>>> +        */
>>> +       if (read_cpuid_part_number() != ARM_CPU_PART_CORTEX_A9) {
>> I haven't done a full review of this patch, but it seems unlikely that
>> your uses of read_cpuid_part_number() and read_cpuid_part() in this
>> patch are correct.  You use both functions and in both cases compare
>> the results to ARM_CPU_PART_CORTEX_A9.
> I think read_cpuid_part() would be the correct one, as it does
You are right, read_cpuid_part() is correct one on kernel next,
I mix up 3.14 kernel and next tree, only read_cpuid_part_number() is 
available
in 3.14 kernel.

I will correct it in my next version, any other changes needed for new 
version?

- Kever.
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