linux-kernel - Re: [PATCH] pinctrl: mediatek: check mtk_is_virt

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Date:   Wed, 19 Aug 2020 16:43:18 -0700
From:   Sean Wang <sean.wang@...nel.org>
To:     Hanks Chen <hanks.chen@...iatek.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
        lkml <linux-kernel@...r.kernel.org>,
        CC Hwang <cc.hwang@...iatek.com>,
        sin_jieyang <sin_jieyang@...iatek.com>
Subject: Re: [PATCH] pinctrl: mediatek: check mtk_is_virt_gpio input parameter

Hi Hanks,

On Thu, Aug 13, 2020 at 4:14 AM Hanks Chen <hanks.chen@...iatek.com> wrote:
>
> check mtk_is_virt_gpio input parameter,
> virtual gpio need to support eint mode.
>
> add error handler for the ko case
> to fix this boot fail:
> pc : mtk_is_virt_gpio+0x20/0x38 [pinctrl_mtk_common_v2]
> lr : mtk_gpio_get_direction+0x44/0xb0 [pinctrl_paris]

it is better we post the complete call stack when the failure occurs

>
> Fixes: edd546465002 ("pinctrl: mediatek: avoid virtual gpio trying to set reg")
> Singed-off-by: sin_jieyang <sin_jieyang@...iatek.com>

signed-off-by with the full name

> Signed-off-by: Hanks Chen <hanks.chen@...iatek.com>
> ---
>  drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
> index c53e2c391e32..27ab9c512ae1 100644
> --- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
> +++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
> @@ -259,6 +259,10 @@ bool mtk_is_virt_gpio(struct mtk_pinctrl *hw, unsigned int gpio_n)
>
>         desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio_n];
>
> +       /* if the GPIO is not supported for eint mode */
> +       if (desc->eint.eint_m == EINT_NA)

s/NO_EINT_SUPPORT/EINT_NA/ to align with pinctrl/mediatek/pinctrl-mtk-mt*.h uses

> +               return virt_gpio;
> +
>         if (desc->funcs && !desc->funcs[desc->eint.eint_m].name)
>                 virt_gpio = true;
>
> --
> 2.18.0