linux-kernel - Re: [BUG] pinctrl: sunxi: sunxi-pinctrl fail to load with CONFIG_DEBUG_TEST_DRIVER

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Message-ID: <CAGb2v65MHBUwWzcqwPYDtFNxgGnMECUMjHdZNOv6YPP4HVzwTw@mail.gmail.com>
Date:   Mon, 7 Nov 2016 17:48:43 +0800
From:   Chen-Yu Tsai <wens@...e.org>
To:     LABBE Corentin <clabbe.montjoie@...il.com>
Cc:     Maxime Ripard <maxime.ripard@...e-electrons.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-sunxi <linux-sunxi@...glegroups.com>
Subject: Re: [BUG] pinctrl: sunxi: sunxi-pinctrl fail to load with CONFIG_DEBUG_TEST_DRIVER_REMOVE

Hi,

On Mon, Nov 7, 2016 at 4:18 PM, LABBE Corentin
<clabbe.montjoie@...il.com> wrote:
> Hello
>
> With CONFIG_DEBUG_TEST_DRIVER_REMOVE=y pinctrl-sunxi fail to load on the second try.
>
> [    3.900061] sun8i-h3-pinctrl 1c20800.pinctrl: initialized sunXi PIO driver
> [    3.916251] gpio gpiochip1: GPIO integer space overlap, cannot add chip
> [    3.923016] gpiochip_add_data: GPIOs 0..223 (1c20800.pinctrl) failed to register
> [    3.931099] sun8i-h3-pinctrl: probe of 1c20800.pinctrl failed with error -16
> [    3.944709] sun8i-h3-r-pinctrl 1f02c00.pinctrl: initialized sunXi PIO driver
> [    3.960796] gpio gpiochip2: GPIO integer space overlap, cannot add chip
> [    3.967594] gpiochip_add_data: GPIOs 352..383 (1f02c00.pinctrl) failed to register
> [    3.975633] sun8i-h3-r-pinctrl: probe of 1f02c00.pinctrl failed with error -16
>
> Without it, all subsequent drivers fail to load.
> Tested on Orange PI PC board.

I don't think the pinctrl drivers were designed to be removed.
And I thought the lack of a .remove callback in the driver blocks
the core from removing the device? Maybe I remember wrong...

ChenYu

>
> Regards