linux-kernel - Re: [PATCH v2 04/10] pinctrl: sunxi: Prepare for building SoC specific drivers as modules

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Date:	Tue, 19 May 2015 16:58:19 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Johan Hovold <johan@...nel.org>
Cc:	Jens Kuske <jenskuske@...il.com>,
	Emilio López <emilio@...pez.com.ar>,
	Mike Turquette <mturquette@...aro.org>,
	Rob Herring <robh+dt@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
	Vishnu Patekar <vishnupatekar0510@...il.com>,
	Hans de Goede <hdegoede@...hat.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-sunxi <linux-sunxi@...glegroups.com>
Subject: Re: [PATCH v2 04/10] pinctrl: sunxi: Prepare for building SoC
 specific drivers as modules

On Tue, May 19, 2015 at 9:55 AM, Maxime Ripard
<maxime.ripard@...e-electrons.com> wrote:

>> Apart from that, currently the kernel panics some seconds after removing
>> the pinctrl module because mmc wants to access a gpio. Can this be
>> prevented somehow? I think pinctrl must not be removed once other
>> devices use any pin-related things.
>
> pinctrl_unregister doesn't look like it cares about whether or not
> there's users left in the system.

Both GPIO and pinctrl has this problem, Johan Hovold has been
looking at fixing the GPIO side of things.

Patches welcome.

Yours,
Linus Walleij
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