linux-kernel - Re: [PATCH] crypto: picoxcell - Fix module autoload for non-OF registration

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Message-ID: <e66bdf95-a99b-1942-334f-1125ee552d05@osg.samsung.com>
Date:   Mon, 2 Jan 2017 13:32:11 -0300
From:   Javier Martinez Canillas <javier@....samsung.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Herbert Xu <herbert@...dor.apana.org.au>,
        linux-crypto@...r.kernel.org, Jamie Iles <jamie@...ieiles.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH] crypto: picoxcell - Fix module autoload for non-OF
 registration

On 01/02/2017 01:24 PM, Arnd Bergmann wrote:
> On Monday, January 2, 2017 1:13:24 PM CET Javier Martinez Canillas wrote:
>> Hello Arnd,
>>
>> On 01/02/2017 01:05 PM, Arnd Bergmann wrote:
>>> On Monday, January 2, 2017 12:38:02 PM CET Javier Martinez Canillas wrote:
>>>> If the driver is built as a module, autoload won't work because the module
>>>> alias information is not filled. So user-space can't match the registered
>>>> device with the corresponding module if the device isn't registered via OF.
>>>>
>>>> Export the module alias information using the MODULE_DEVICE_TABLE() macro.
>>>
>>> I think we can just remove the table, as the platform only supports
>>> booting through DT anyway.
>>>
>>
>> Agreed. I should had checked if mach-picoxcell was DT-only indeed.
>>
>> Should I also make the driver to depend on OF and remove the #ifdefery then?
> 
> I don't think we need a dependency, the #ifdef checks in there were needed
> only to make the driver smaller if OF is disabled and it should still build
> fine if someone tries to compile it for CONFIG_COMPILE_TEST without
> CONFIG_OF.
>

OK, the driver doesn't depend on COMPILE_TEST though but I agree with you
since it seems the driver only has runtime but no build time dependencies
with ARCH_PICOXCELL.
 
> If we remove the platform ID, we can however also remove the 
> spacc_is_compatible() function and just call of_device_is_compatible()
> in its place.
>

Yes.

> 	Arnd
> 

Best regards,
-- 
Javier Martinez Canillas
Open Source Group
Samsung Research America