linux-kernel - Re: [PATCH v2 3/3] drivers: cleanup Kconfig stuff

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Date:	Wed, 20 Oct 2010 11:53:15 +0300
From:	"felipe.contreras@...il.com" <felipe.contreras@...il.com>
To:	Roger Quadros <roger.quadros@...ia.com>
Cc:	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	linux-omap <linux-omap@...r.kernel.org>,
	linux-main <linux-kernel@...r.kernel.org>,
	Greg KH <greg@...ah.com>, Felipe Balbi <balbi@...com>,
	Tony Lindgren <tony@...mide.com>
Subject: Re: [PATCH v2 3/3] drivers: cleanup Kconfig stuff

On Wed, Oct 20, 2010 at 10:46 AM, Roger Quadros <roger.quadros@...ia.com> wrote:
> On 10/19/2010 05:33 PM, ext Felipe Contreras wrote:
>> On Tue, Oct 19, 2010 at 4:40 PM, Roger Quadros<roger.quadros@...ia.com>
>>  wrote:
>>>>
>>>> @@ -843,6 +841,7 @@ config USB_CDC_COMPOSITE
>>>>  config USB_G_NOKIA
>>>>        tristate "Nokia composite gadget"
>>>>        depends on PHONET
>>>> +       depends on USB_GADGET_MUSB_HDRC
>>>
>>> This is wrong. Is there a build problem or run-time problem without this?
>>
>> Try:
>> CONFIG_USB_G_NOKIA=y
>> CONFIG_USB_GADGET_MUSB_HDRC=n
>>
>> At least g_nokia doesn't seem to work correctly on my N900.
>>
> It won't work on N900 because N900 has MUSB USB gadget controller and it
> needs to be selected somehow while building for N900.
>
> You should set CONFIG_USB_GADGET_MUSB_HDRC to y somewhere else while
> building for N900 and not here because g_nokia is not MUSB specific.

How do you expect people to know that? The Kconfig should define what
USB_G_NOKIA needs to work, so that people can enable those things
without go Googling hunting for a workable defconfig. Right now people
can build g_nokia modules that don't work, and that shouldn't be
allowed by the Kconfig.

-- 
Felipe Contreras
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