linux-kernel - Re: [PATCH] pinctrl: single: Fix error return code in pcs_parse_bits_in_pinctrl

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Date:   Thu, 15 Jul 2021 19:49:27 +0800
From:   "weiyongjun (A)" <weiyongjun1@...wei.com>
To:     Zhen Lei <thunder.leizhen@...wei.com>,
        Tony Lindgren <tony@...mide.com>,
        Haojian Zhuang <haojian.zhuang@...aro.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Manjunathappa Prakash <prakash.pm@...com>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-omap <linux-omap@...r.kernel.org>,
        linux-gpio <linux-gpio@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] pinctrl: single: Fix error return code in
 pcs_parse_bits_in_pinctrl_entry()

> Fix to return -ENOTSUPP instead of 0 when PCS_HAS_PINCONF is true, which
> is the same as that returned in pcs_parse_pinconf().
>
> In addition, I found the value of pcs->flags is not overwritten in
> pcs_parse_bits_in_pinctrl_entry() and its subfunctions, so moving this
> check to the beginning of the function eliminates unnecessary rollback
> operations.
>
> Fixes: 4e7e8017a80e ("pinctrl: pinctrl-single: enhance to configure multiple pins of different modules")
> Reported-by: Hulk Robot <hulkci@...wei.com>
> Signed-off-by: Zhen Lei <thunder.leizhen@...wei.com>
> ---
>   drivers/pinctrl/pinctrl-single.c | 21 ++++++++-------------
>   1 file changed, 8 insertions(+), 13 deletions(-)
>
>
>   	npins_in_row = pcs->width / pcs->bits_per_pin;
>   
>   	vals = devm_kzalloc(pcs->dev,
> @@ -1212,29 +1217,19 @@ static int pcs_parse_bits_in_pinctrl_entry(struct pcs_device *pcs,
>   		goto free_pins;
>   	}
>   
> -	gsel = pinctrl_generic_add_group(pcs->pctl, np->name, pins, found, pcs);
> -	if (gsel < 0) {
> -		res = gsel;
> +	res = pinctrl_generic_add_group(pcs->pctl, np->name, pins, found, pcs);
> +	if (res < 0)
>   		goto free_function;
> -	}


This change cause 'gsel' not set.

Do not mix this cleanup with bugfix.