linux-kernel - Re: [PATCH] input: joystick: make USB drivers depend on USB

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Date:   Wed, 17 Jan 2018 16:01:36 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Marcus Folkesson <marcus.folkesson@...il.com>
Cc:     Tomohiro Yoshidomi <sylph23k@...il.com>,
        David Herrmann <dh.herrmann@...il.com>,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] input: joystick: make USB drivers depend on USB

On 01/17/2018 01:53 PM, Dmitry Torokhov wrote:
> On Wed, Jan 17, 2018 at 10:30:10PM +0100, Marcus Folkesson wrote:
>> A driver should not enable an entire subsystem.
> 
> I disagree. As you go through menuconfig and you encounter this option
> and you have the hardware and you want to enable it, you should be able
> to do so. Otherwise you enable bunch of functionality, then go back,
> see what new options appeared, enable them, go back, see if any more new
> options appeared, and so on.
> 
> What exactly prompted this change?

Two things:  today when I reviewed Marcus's patch that selected USB, I
commented something along that line.

But that was based on something that Linus has written at least two times
in the past on lkml.

>>
>> Signed-off-by: Marcus Folkesson <marcus.folkesson@...il.com>
>> ---
>>  drivers/input/joystick/Kconfig | 3 +--
>>  1 file changed, 1 insertion(+), 2 deletions(-)
>>
>> diff --git a/drivers/input/joystick/Kconfig b/drivers/input/joystick/Kconfig
>> index 332c0cc1b2ab..4a199cff8c68 100644
>> --- a/drivers/input/joystick/Kconfig
>> +++ b/drivers/input/joystick/Kconfig
>> @@ -279,8 +279,7 @@ config JOYSTICK_JOYDUMP
>>  
>>  config JOYSTICK_XPAD
>>  	tristate "X-Box gamepad support"
>> -	depends on USB_ARCH_HAS_HCD
>> -	select USB
>> +	depends on USB
>>  	help
>>  	  Say Y here if you want to use the X-Box pad with your computer.
>>  	  Make sure to say Y to "Joystick support" (CONFIG_INPUT_JOYDEV)
>> -- 


-- 
~Randy