linux-kernel - Re: [PATCH 12/38] HSI: omap_ssi_port: fix handling of_get_named

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Message-id: <566E9974.1050700@samsung.com>
Date:	Mon, 14 Dec 2015 11:27:00 +0100
From:	Andrzej Hajda <a.hajda@...sung.com>
To:	linux-kernel@...r.kernel.org, Sebastian Reichel <sre@...nel.org>
Cc:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>
Subject: Re: [PATCH 12/38] HSI: omap_ssi_port: fix handling of_get_named_gpio
 result

Hi,

Ping - almost three months passed.

Regards
Andrzej


On 09/21/2015 03:33 PM, Andrzej Hajda wrote:
> The function can return negative value.
>
> The problem has been detected using proposed semantic patch
> scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci [1].
>
> [1]: http://permalink.gmane.org/gmane.linux.kernel/2038576
>
> Signed-off-by: Andrzej Hajda <a.hajda@...sung.com>
> ---
>  drivers/hsi/controllers/omap_ssi_port.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/hsi/controllers/omap_ssi_port.c b/drivers/hsi/controllers/omap_ssi_port.c
> index 1f8652b..d93dd09 100644
> --- a/drivers/hsi/controllers/omap_ssi_port.c
> +++ b/drivers/hsi/controllers/omap_ssi_port.c
> @@ -1147,13 +1147,13 @@ static int __init ssi_port_probe(struct platform_device *pd)
>  		goto error;
>  	}
>  
> -	cawake_gpio = of_get_named_gpio(np, "ti,ssi-cawake-gpio", 0);
> -	if (cawake_gpio < 0) {
> +	err = of_get_named_gpio(np, "ti,ssi-cawake-gpio", 0);
> +	if (err < 0) {
>  		dev_err(&pd->dev, "DT data is missing cawake gpio (err=%d)\n",
> -			cawake_gpio);
> -		err = -ENODEV;
> +			err);
>  		goto error;
>  	}
> +	cawake_gpio = err;
>  
>  	err = devm_gpio_request_one(&port->device, cawake_gpio, GPIOF_DIR_IN,
>  		"cawake");

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