linux-kernel - Re: [PATCH net-next] xdp: Remove redundant warning

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Message-ID: <095fa222-824a-b38c-3432-35bdb61bab88@redhat.com>
Date:   Wed, 27 Oct 2021 08:20:52 +0200
From:   Jesper Dangaard Brouer <jbrouer@...hat.com>
To:     Yajun Deng <yajun.deng@...ux.dev>, ast@...nel.org,
        daniel@...earbox.net, davem@...emloft.net, kuba@...nel.org,
        hawk@...nel.org, john.fastabend@...il.com
Cc:     brouer@...hat.com, netdev@...r.kernel.org, bpf@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Björn Töpel <bjorn@...nel.org>
Subject: Re: [PATCH net-next] xdp: Remove redundant warning


On 27/10/2021 03.38, Yajun Deng wrote:
> There is a warning in xdp_rxq_info_unreg_mem_model() when reg_state isn't
> equal to REG_STATE_REGISTERED, so the warning in xdp_rxq_info_unreg() is
> redundant.
 >
> Signed-off-by: Yajun Deng <yajun.deng@...ux.dev>

Acked-by: Jesper Dangaard Brouer <brouer@...hat.com>

I guess/wonder if we should mark this as a fix for:

Fixes: dce5bd6140a4 ("xdp: export xdp_rxq_info_unreg_mem_model")

> ---
>   net/core/xdp.c | 2 --
>   1 file changed, 2 deletions(-)
> 
> diff --git a/net/core/xdp.c b/net/core/xdp.c
> index cc92ccb38432..5ddc29f29bad 100644
> --- a/net/core/xdp.c
> +++ b/net/core/xdp.c
> @@ -143,8 +143,6 @@ void xdp_rxq_info_unreg(struct xdp_rxq_info *xdp_rxq)
>   	if (xdp_rxq->reg_state == REG_STATE_UNUSED)
>   		return;
>   
> -	WARN(!(xdp_rxq->reg_state == REG_STATE_REGISTERED), "Driver BUG");
> -
>   	xdp_rxq_info_unreg_mem_model(xdp_rxq);
>   
>   	xdp_rxq->reg_state = REG_STATE_UNREGISTERED;
>