linux-kernel - Re: [PATCH 2/7] pinctrl: mediatek: paris: Fix PIN_CONFIG_BIAS

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <8ca8dd15-30c3-a89e-9a18-c8b8788e0904@collabora.com>
Date:   Tue, 11 Jan 2022 14:42:17 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Chen-Yu Tsai <wenst@...omium.org>,
        Sean Wang <sean.wang@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>
Cc:     linux-mediatek@...ts.infradead.org, linux-gpio@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Zhiyong Tao <zhiyong.tao@...iatek.com>,
        Guodong Liu <guodong.liu@...iatek.com>
Subject: Re: [PATCH 2/7] pinctrl: mediatek: paris: Fix PIN_CONFIG_BIAS_DISABLE
 readback

Il 11/01/22 12:22, Chen-Yu Tsai ha scritto:
> When reading back pin bias settings, if the pin is not in a
> bias-disabled state, the function should return -EINVAL.
> 
> Fix this in the mediatek-paris pinctrl library so that the read back
> state is not littered with bogus a "input bias disabled" combined with
> "pull up" or "pull down" states.
> 
> Fixes: 805250982bb5 ("pinctrl: mediatek: add pinctrl-paris that implements the vendor dt-bindings")
> Signed-off-by: Chen-Yu Tsai <wenst@...omium.org>


Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>

> ---
>   drivers/pinctrl/mediatek/pinctrl-paris.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/pinctrl/mediatek/pinctrl-paris.c b/drivers/pinctrl/mediatek/pinctrl-paris.c
> index f9f9110f2107..1ca598ea7ba7 100644
> --- a/drivers/pinctrl/mediatek/pinctrl-paris.c
> +++ b/drivers/pinctrl/mediatek/pinctrl-paris.c
> @@ -97,8 +97,8 @@ static int mtk_pinconf_get(struct pinctrl_dev *pctldev,
>   			if (err)
>   				goto out;
>   			if (param == PIN_CONFIG_BIAS_DISABLE) {
> -				if (ret == MTK_PUPD_SET_R1R0_00)
> -					ret = MTK_DISABLE;
> +				if (ret != MTK_PUPD_SET_R1R0_00)
> +					err = -EINVAL;
>   			} else if (param == PIN_CONFIG_BIAS_PULL_UP) {
>   				/* When desire to get pull-up value, return
>   				 *  error if current setting is pull-down
>