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

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On Tue, May 22, 2012 at 1:45 PM, David Daney <ddaney.cavm@xxxxxxxxx> wrote:
> On 05/19/2012 11:08 PM, Grant Likely wrote:
>>
>> On Sat, 19 May 2012 23:54:36 -0600, Grant
>> Likely<grant.likely@xxxxxxxxxxxx>  wrote:
>>>
>>> On Fri, 11 May 2012 15:05:21 -0700, David Daney<ddaney.cavm@xxxxxxxxx>
>>>  wrote:
>>>>
>>>> From: David Daney<david.daney@xxxxxxxxxx>
>>>>
>>>> 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@xxxxxxxxxx>
>>>
>>>
>>> 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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