linux-kernel - Re: [PATCH] USB: USB_OTG does not depend on PM

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Date:	Tue, 17 Nov 2015 15:38:33 -0600
From:	Felipe Balbi <balbi@...com>
To:	Arnd Bergmann <arnd@...db.de>,
	Peter Chen <Peter.Chen@...escale.com>,
	<gregkh@...uxfoundation.org>
CC:	<linux-usb@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] USB: USB_OTG does not depend on PM


Hi,

Arnd Bergmann <arnd@...db.de> writes:
> USB_OTG initially depended on USB_SUSPEND, which was later turned into
> PM_RUNTIME and finally into PM. I don't know at what point the dependency
> became unnecessary but it appears to work fine without CONFIG_PM now.
>
> However, we get lots of warnings in randconfig kernels like:
>
> warning: (USB_OTG_FSM && FSL_USB2_OTG && USB_MV_OTG) selects USB_OTG which has unmet direct dependencies (USB_SUPPORT && USB && PM)
>
> whenever CONFIG_PM is disabled and something else selects USB_OTG.
> Let's just drop the dependency to avoid the warnings.
>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
> I keep seeing this one in my ARM randconfig test

and how did you test this ? Did you make sure you're not breaking HNP ?
For HNP to happen we depend on a bus_suspend and bus_suspend is only
available on CONFIG_PM, unless that has changed.

Seems like you've only compile tested this patch, is that correct ?

-- 
balbi

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