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Re: [PATCH 1/3] of: Add prefix parameter to of_modalias_node().

To: David Daney <ddaney.cavm@gmail.com>
Subject: Re: [PATCH 1/3] of: Add prefix parameter to of_modalias_node().
From: Grant Likely <grant.likely@secretlab.ca>
Date: Tue, 22 May 2012 14:09:50 -0600
Cc: "devicetree-discuss@lists.ozlabs.org" <devicetree-discuss@lists.ozlabs.org>, Rob Herring <rob.herring@calxeda.com>, "spi-devel-general@lists.sourceforge.net" <spi-devel-general@lists.sourceforge.net>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "linux-mips@linux-mips.org" <linux-mips@linux-mips.org>, "linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>, Liam Girdwood <lrg@ti.com>, Tabi Timur-B04825 <B04825@freescale.com>, Mark Brown <broonie@opensource.wolfsonmicro.com>, Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.de>, "alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>, "linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>
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On Tue, May 22, 2012 at 1:45 PM, David Daney <ddaney.cavm@gmail.com> wrote:
> On 05/19/2012 11:08 PM, Grant Likely wrote:
>>
>> On Sat, 19 May 2012 23:54:36 -0600, Grant
>> Likely<grant.likely@secretlab.ca>  wrote:
>>>
>>> On Fri, 11 May 2012 15:05:21 -0700, David Daney<ddaney.cavm@gmail.com>
>>>  wrote:
>>>>
>>>> From: David Daney<david.daney@cavium.com>
>>>>
>>>> When generating MODALIASes, it is convenient to add things like "spi:"
>>>> or "i2c:" to the front of the strings.  This allows the standard
>>>> modprobe to find the right driver when automatically populating bus
>>>> children from the device tree structure.
>>>>
>>>> Add a prefix parameter, and adjust callers.  For
>>>> of_register_spi_devices() use the "spi:" prefix.
>>>>
>>>> Signed-off-by: David Daney<david.daney@cavium.com>
>>>
>>>
>>> Applied, thanks.  Some notes below...
>>
>>
>> Wait... why is this necessary?
>
>
> Because in of_register_spi_devices() in of_spi.c, you do:
>
>        request_module(spi->modalias);
>
> The string passed to request_module() must have the "spi:" prefix.

How about modifying the call to request_module() to include the prefix
also?  I think that would be a simpler change overall.  Would that
work?

g.

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