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From: "Heiko Stübner" <heiko@sntech.de>
To: linus.walleij@linaro.org, Jianqun Xu <jay.xu@rock-chips.com>
Cc: linux-gpio@vger.kernel.org, Jianqun Xu <jay.xu@rock-chips.com>,
	linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org
Subject: Re: [PATCH 4/6] pinctrl: rockchip: do not set gpio if bank invalid
Date: Sun, 06 Sep 2020 00:09:26 +0200	[thread overview]
Message-ID: <1687104.4lZP0y4C37@diego> (raw)
In-Reply-To: <20200831084753.7115-5-jay.xu@rock-chips.com>

Am Montag, 31. August 2020, 10:47:51 CEST schrieb Jianqun Xu:
> Add valid check for gpio bank.

As this obviously fixes a problem you encountered please elaborate a bit more.
Just so that people reading the log later understand when this issue surfaced.

Also - maybe even more important - why is this limited to PIN_CONFIG_OUTPUT?
Like when the whole bank is not valid, you should be able to return the -ENOTSUPP
even before entering the "for" loop in these functions.


> Change-Id: Ib03e2910a7316bd61df18236151e371c4d04077a

Please remove the changeId.

Thanks
Heiko

> Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>
> ---
>  drivers/pinctrl/pinctrl-rockchip.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c
> index 265d64b8c4f5..6080573155f6 100644
> --- a/drivers/pinctrl/pinctrl-rockchip.c
> +++ b/drivers/pinctrl/pinctrl-rockchip.c
> @@ -2687,6 +2687,9 @@ static int rockchip_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
>  				return rc;
>  			break;
>  		case PIN_CONFIG_OUTPUT:
> +			if (!bank->valid)
> +				return -ENOTSUPP;
> +
>  			rockchip_gpio_set(&bank->gpio_chip,
>  					  pin - bank->pin_base, arg);
>  			rc = _rockchip_pmx_gpio_set_direction(&bank->gpio_chip,
> @@ -2752,6 +2755,9 @@ static int rockchip_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
>  		arg = 1;
>  		break;
>  	case PIN_CONFIG_OUTPUT:
> +		if (!bank->valid)
> +			return -ENOTSUPP;
> +
>  		rc = rockchip_get_mux(bank, pin - bank->pin_base);
>  		if (rc != RK_FUNC_GPIO)
>  			return -EINVAL;
> 





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  reply	other threads:[~2020-09-05 22:09 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-31  8:47 [PATCH 0/6] rockchip-pinctrl fixes for GKI Jianqun Xu
2020-08-31  8:47 ` [PATCH 1/6] pinctrl: rockchip: make driver be tristate module Jianqun Xu
2020-09-01 10:13   ` kernel test robot
2020-09-05 21:51     ` Heiko Stübner
2020-09-05 22:01   ` Heiko Stübner
2020-09-05 22:23     ` Heiko Stübner
2020-08-31  8:47 ` [PATCH 2/6] pinctrl: rockchip: enable gpio pclk for rockchip_gpio_to_irq Jianqun Xu
2020-09-05 21:54   ` Heiko Stübner
2020-08-31  8:47 ` [PATCH 3/6] pinctrl: rockchip: create irq mapping in gpio_to_irq Jianqun Xu
2020-09-05 22:03   ` Heiko Stübner
2020-08-31  8:47 ` [PATCH 4/6] pinctrl: rockchip: do not set gpio if bank invalid Jianqun Xu
2020-09-05 22:09   ` Heiko Stübner [this message]
2020-08-31  8:50 ` [PATCH 5/6] pinctrl: rockchip: fix crash caused by invalid gpio bank Jianqun Xu
2020-09-05 22:14   ` Heiko Stübner
2020-08-31  8:50 ` [PATCH 6/6] pinctrl: rockchip: populate platform device for rockchip gpio Jianqun Xu
2020-09-06 10:20   ` Heiko Stübner
2020-09-07  2:59 ` [PATCH v2 0/5] rockchip-pinctrl fixes for GKI Jianqun Xu
2020-09-07  2:59   ` [PATCH 1/5] pinctrl: rockchip: depend on OF Jianqun Xu
2020-09-07  2:59   ` [PATCH 2/5] pinctrl: rockchip: make driver be tristate module Jianqun Xu
2020-09-07 11:35     ` kernel test robot
2020-09-12 11:41     ` Heiko Stübner
2020-09-14  0:38     ` [PATCH 2/2] " Jianqun Xu
2020-09-20 22:14       ` Heiko Stübner
2020-09-20 22:18         ` Heiko Stübner
2020-09-29 13:21           ` Linus Walleij
2020-10-13  6:40             ` jay.xu
2020-09-07  2:59   ` [PATCH 3/5] pinctrl: rockchip: enable gpio pclk for rockchip_gpio_to_irq Jianqun Xu
2020-09-07  2:59   ` [PATCH 4/5] pinctrl: rockchip: create irq mapping in gpio_to_irq Jianqun Xu
2020-09-07  3:38   ` [PATCH 5/5] pinctrl: rockchip: populate platform device for rockchip gpio Jianqun Xu
2020-09-08  2:19     ` [PATCH] " Jianqun Xu
2020-09-20 22:16       ` Heiko Stübner
2020-09-12 11:35   ` [PATCH v2 0/5] rockchip-pinctrl fixes for GKI Linus Walleij

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