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

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Date:   Mon, 19 Sep 2016 17:49:29 +0800
From:   Hanjun Guo <hanjun.guo@...aro.org>
To:     Marc Zyngier <marc.zyngier@....com>,
        Hanjun Guo <guohanjun@...wei.com>,
        "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 2016/9/15 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.

> been repeatedly advising you to work with him and others to make it
> happen. You can choose to ignore this advise, but that doesn't make this
> patch an acceptable approach.

OK, I will drop this patch in next version, and work on the generic
solution instead.

Thanks
Hanjun