linux-kernel - Re: [RFC PATCH v2 11/11] irqchip: mbigen: promote mbigen init

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Date:   Tue, 20 Sep 2016 10:43:10 +0800
From:   Hanjun Guo <guohanjun@...wei.com>
To:     Marc Zyngier <marc.zyngier@....com>,
        Hanjun Guo <hanjun.guo@...aro.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>
CC:     <linux-acpi@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Bjorn Helgaas" <bhelgaas@...gle.com>,
        Greg KH <gregkh@...uxfoundation.org>,
        "Tomasz Nowicki" <tn@...ihalf.com>, Ma Jun <majun258@...wei.com>,
        Kefeng Wang <wangkefeng.wang@...wei.com>,
        Charles Garcia-Tobin <charles.garcia-tobin@....com>,
        <linuxarm@...wei.com>
Subject: Re: [RFC PATCH v2 11/11] irqchip: mbigen: promote mbigen init

On 2016/9/19 18:12, Marc Zyngier wrote:
> On 19/09/16 10:49, Hanjun Guo wrote:
>> On 2016/9/15 23:24, Marc Zyngier wrote:
>>> On 14/09/16 15:21, Hanjun Guo wrote:
>>>> From: Hanjun Guo <hanjun.guo@...aro.org>
>>>>
>>>> mbigen is an irqchip and it needs to be probed before
>>>> devices, same logic is used for SMMU and etc., let's
>>>> use arch_initcall instead of platform init for mbigen.
>>>>
>>>> Cc: Marc Zyngier <marc.zyngier@....com>
>>>> Cc: Thomas Gleixner <tglx@...utronix.de>
>>>> Cc: Ma Jun <majun258@...wei.com>
>>>> Signed-off-by: Hanjun Guo <hanjun.guo@...aro.org>
>>>> ---
>>>>  drivers/irqchip/irq-mbigen.c | 6 +++++-
>>>>  1 file changed, 5 insertions(+), 1 deletion(-)
>>>>
>>>> diff --git a/drivers/irqchip/irq-mbigen.c b/drivers/irqchip/irq-mbigen.c
>>>> index ca6add1..3a33de6 100644
>>>> --- a/drivers/irqchip/irq-mbigen.c
>>>> +++ b/drivers/irqchip/irq-mbigen.c
>>>> @@ -374,7 +374,11 @@ static struct platform_driver mbigen_platform_driver = {
>>>>  	.probe			= mbigen_device_probe,
>>>>  };
>>>>
>>>> -module_platform_driver(mbigen_platform_driver);
>>>> +static __init int mbigen_init(void)
>>>> +{
>>>> +	return platform_driver_register(&mbigen_platform_driver);
>>>> +}
>>>> +arch_initcall(mbigen_init);
>>>>
>>>>  MODULE_AUTHOR("Jun Ma <majun258@...wei.com>");
>>>>  MODULE_AUTHOR("Yun Wu <wuyun.wu@...wei.com>");
>>>>
>>> I've already NACKed such a patch in the past, and I will carry on
>>> NACKing it until all the other avenues (like properly tracking device
>>> dependencies) have been explored and have been proven not to be fit for
>>> purpose.
>> I'd happy to work on this to make progress.
>>
>>> Rafael had proposed something around this subject last year, and I've
>> Sorry, obviously I missed something, could you give me the link about
>> Rafael's patches? I will pull back and test it on our hardware.
> Please see this discussion from almost a year ago:
>
> https://patchwork.kernel.org/patch/7407401/
>
> in which I give the existing pointers and explain why I'm pushing back
> on things like this patch.

We (Majun and me ) will look into it, thanks!

Hanjun