linux-kernel - Re: [PATCH] ieee802154-atusb: Delete an unnecessary check before the function call "kfree

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Date:	Tue, 17 Nov 2015 17:18:12 +0100
From:	Stefan Schmidt <stefan@....samsung.com>
To:	Alexander Aring <alex.aring@...il.com>, linux-wpan@...r.kernel.org,
	netdev@...r.kernel.org, Marcel Holtmann <marcel@...tmann.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: Re: [PATCH] ieee802154-atusb: Delete an unnecessary check before the
 function call "kfree_skb"

Hello.

On 17/11/15 17:17, Stefan Schmidt wrote:
> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Mon, 16 Nov 2015 13:50:23 +0100
>
> The kfree_skb() function tests whether its argument is NULL and then
> returns immediately. Thus the test around the call is not needed.
>
> This issue was detected by using the Coccinelle software.
>
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
> ---
>  drivers/net/ieee802154/atusb.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/net/ieee802154/atusb.c 
> b/drivers/net/ieee802154/atusb.c
> index 199a94a..b1cd865 100644
> --- a/drivers/net/ieee802154/atusb.c
> +++ b/drivers/net/ieee802154/atusb.c
> @@ -310,8 +310,7 @@ static void atusb_free_urbs(struct atusb *atusb)
>          urb = usb_get_from_anchor(&atusb->idle_urbs);
>          if (!urb)
>              break;
> -        if (urb->context)
> -            kfree_skb(urb->context);
> +        kfree_skb(urb->context);
>          usb_free_urb(urb);
>      }
>  }

Acked-by: Stefan Schmidt <stefan@....samsung.com>

regards
Stefan Schmidt
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