linux-kernel - Re: [PATCH 03/18] mtd: dataflash: Export OF module alias information

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Message-ID: <20150821224714.GD81844@google.com>
Date:	Fri, 21 Aug 2015 15:47:14 -0700
From:	Brian Norris <computersforpeace@...il.com>
To:	Javier Martinez Canillas <javier@....samsung.com>
Cc:	linux-kernel@...r.kernel.org, Mark Brown <broonie@...nel.org>,
	linux-mtd@...ts.infradead.org,
	David Woodhouse <dwmw2@...radead.org>
Subject: Re: [PATCH 03/18] mtd: dataflash: Export OF module alias information

Hi Javier,

On Fri, Aug 21, 2015 at 12:57:54AM +0200, Javier Martinez Canillas wrote:
> On 08/21/2015 12:34 AM, Brian Norris wrote:
> > On Fri, Aug 21, 2015 at 12:13:34AM +0200, Javier Martinez Canillas wrote:
> >> So this patch really is a no-op right now and is not fixing anything.
> >> As long as the driver has a MODULE_DEVICE_TABLE(spi,...), things will
> > 
> > This driver does not have a MODULE_DEVICE_TABLE() at all, nor does it
> > use spi_device_id. So, it is currently broken for the module use case.
> >
> 
> That is correct but also that does not mean that this patch will fix
> module autoloading right now. It will though once the SPI core is
> changed to report a OF type module alias.

Ah, thanks for the patience. I missed the point that it will still be
broken.

> So what about something along this lines?
> 
> mtd: dataflash: Export OF module alias information
> 
> The SPI core currently reports the MODALIAS uevent as "spi:<modalias>"
> even for SPI devices that were registered by OF.
> 
> That means the OF module alias exported by MODULE_OF_TABLE(of,...) is
> currently not used and user-space has no way to autoload this module.
> 
> But is still a good practice to add the OF module alias information

nit: s/is/it is/

> into the kernel module even when currently is unused so once the SPI

ditto

> core is changed to report a correct OF modalias uevent, module
> autoloading will be working for this driver.

Otherwise, looks good. I'll either patch in this commit message, or
await v2. Your call.

Regards,
Brian
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