netdev - Re: [PATCH 2/3] can: fix oops caused by wrong rtnl dellink usage

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Message-ID: <e092c3e9-56f3-f765-a9ef-89697ec46e16@cogentembedded.com>
Date:	Thu, 23 Jun 2016 15:55:27 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Marc Kleine-Budde <mkl@...gutronix.de>, netdev@...r.kernel.org
Cc:	davem@...emloft.net, linux-can@...r.kernel.org,
	kernel@...gutronix.de, Oliver Hartkopp <socketcan@...tkopp.net>,
	stable@...r.kernel.org
Subject: Re: [PATCH 2/3] can: fix oops caused by wrong rtnl dellink usage

Hello.

On 6/23/2016 12:22 PM, Marc Kleine-Budde wrote:

> From: Oliver Hartkopp <socketcan@...tkopp.net>
>
> For 'real' hardware CAN devices the netlink interface is used to set CAN
> specific communication parameters. Real CAN hardware can not be created nor
> removed with the ip tool ...
>
> This patch adds a private dellink function for the CAN device driver interface
> that does just nothing.
>
> It's a follow up to commit 993e6f2fd ("can: fix oops caused by wrong rtnl
> newlink usage") but for dellink.
>
> Reported-by: ajneu <ajneu1@...il.com>
> Signed-off-by: Oliver Hartkopp <socketcan@...tkopp.net>
> Cc: <stable@...r.kernel.org>
> Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
> ---
>  drivers/net/can/dev.c | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/drivers/net/can/dev.c b/drivers/net/can/dev.c
> index 348dd5001fa4..ad535a854e5c 100644
> --- a/drivers/net/can/dev.c
> +++ b/drivers/net/can/dev.c
> @@ -1011,6 +1011,11 @@ static int can_newlink(struct net *src_net, struct net_device *dev,
>  	return -EOPNOTSUPP;
>  }
>
> +static void can_dellink(struct net_device *dev, struct list_head *head)
> +{
> +	return;

    Why?

> +}
> +
>  static struct rtnl_link_ops can_link_ops __read_mostly = {
>  	.kind		= "can",
>  	.maxtype	= IFLA_CAN_MAX,
[...]

MBR, Sergei