netdev - Re: [PATCH net] ixgbevf: fix invalid use of napi_hash

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Message-ID: <1479309916.8455.195.camel@edumazet-glaptop3.roam.corp.google.com>
Date:   Wed, 16 Nov 2016 07:25:16 -0800
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     David Miller <davem@...emloft.net>
Cc:     netdev <netdev@...r.kernel.org>,
        Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: Re: [PATCH net] ixgbevf: fix invalid use of napi_hash_del()

On Wed, 2016-11-16 at 07:15 -0800, Eric Dumazet wrote:
> From: Eric Dumazet <edumazet@...gle.com>
> 
> Calling napi_hash_del() before netif_napi_del() is dangerous
> if a synchronize_rcu() is not enforced before NAPI struct freeing.
> 
> Lets leave this detail to core networking stack to get it right.
> 
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Cc: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
> ---
>  drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c |    3 ---
>  1 file changed, 3 deletions(-)

Will send a v2

Same stuff is needed in ixgbevf_free_q_vectors()