From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Hemminger <stephen@networkplumber.org>
Subject: Re: [PATCH] kni: unregister an unregisterd net_device
 could cause a kernel crash
Date: Thu, 8 Sep 2016 09:44:42 -0700
Message-ID: <20160908094442.4dfa5b01@xeon-e3>
References: <1473389167-2758-1-git-send-email-zhouyates@gmail.com>
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Cc: ferruh.yigit@intel.com, dev@dpdk.org
To: zhouyangchao <zhouyates@gmail.com>
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On Fri,  9 Sep 2016 10:46:07 +0800
zhouyangchao <zhouyates@gmail.com> wrote:

> Signed-off-by: zhouyangchao <zhouyates@gmail.com>
> ---
>  lib/librte_eal/linuxapp/kni/kni_misc.c |    4 +++-
>  1 files changed, 3 insertions(+), 1 deletions(-)
> 
> diff --git a/lib/librte_eal/linuxapp/kni/kni_misc.c b/lib/librte_eal/linuxapp/kni/kni_misc.c
> index 67e9b7d..ad4e603 100644
> --- a/lib/librte_eal/linuxapp/kni/kni_misc.c
> +++ b/lib/librte_eal/linuxapp/kni/kni_misc.c
> @@ -361,7 +361,9 @@ kni_dev_remove(struct kni_dev *dev)
>  		igb_kni_remove(dev->pci_dev);
>  
>  	if (dev->net_dev) {
> -		unregister_netdev(dev->net_dev);
> +		if (dev->netdev->reg_state == NETREG_REGISTERED){
----------------------------------------------------------------^
Incorrect whitespace. But then again the whole KNI driver fails completely when
running kernel style check.