linux-kernel - Re: [PATCH 11/38] HSI: omap_ssi: fix handling ida_simple

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Date:	Mon, 14 Dec 2015 11:27:11 +0100
From:	Andrzej Hajda <a.hajda@...sung.com>
To:	linux-kernel@...r.kernel.org
Cc:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Sebastian Reichel <sre@...nel.org>
Subject: Re: [PATCH 11/38] HSI: omap_ssi: fix handling ida_simple_get 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.c | 7 +++----
>  1 file changed, 3 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/hsi/controllers/omap_ssi.c b/drivers/hsi/controllers/omap_ssi.c
> index 089c6c3..5d9225f 100644
> --- a/drivers/hsi/controllers/omap_ssi.c
> +++ b/drivers/hsi/controllers/omap_ssi.c
> @@ -336,11 +336,10 @@ static int __init ssi_add_controller(struct hsi_controller *ssi,
>  		return -ENOMEM;
>  	}
>  
> -	ssi->id = ida_simple_get(&platform_omap_ssi_ida, 0, 0, GFP_KERNEL);
> -	if (ssi->id < 0) {
> -		err = ssi->id;
> +	err = ida_simple_get(&platform_omap_ssi_ida, 0, 0, GFP_KERNEL);
> +	if (err < 0)
>  		goto out_err;
> -	}
> +	ssi->id = err;
>  
>  	ssi->owner = THIS_MODULE;
>  	ssi->device.parent = &pd->dev;

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