netdev - Re: [PATCH 1/3, net-next] net: netsec: Use page

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Date:   Fri, 28 Jun 2019 15:03:17 +0200
From:   Jesper Dangaard Brouer <brouer@...hat.com>
To:     Ilias Apalodimas <ilias.apalodimas@...aro.org>
Cc:     netdev@...r.kernel.org, jaswinder.singh@...aro.org,
        ard.biesheuvel@...aro.org, bjorn.topel@...el.com,
        magnus.karlsson@...el.com, daniel@...earbox.net, ast@...nel.org,
        makita.toshiaki@....ntt.co.jp, jakub.kicinski@...ronome.com,
        john.fastabend@...il.com, davem@...emloft.net,
        maciejromanfijalkowski@...il.com, brouer@...hat.com
Subject: Re: [PATCH 1/3, net-next] net: netsec: Use page_pool API

On Fri, 28 Jun 2019 13:39:13 +0300
Ilias Apalodimas <ilias.apalodimas@...aro.org> wrote:

> @@ -1079,11 +1095,22 @@ static int netsec_setup_rx_dring(struct netsec_priv *priv)
>  	}
>  
>  	netsec_rx_fill(priv, 0, DESC_NUM);
> +	err = xdp_rxq_info_reg(&dring->xdp_rxq, priv->ndev, 0);
> +	if (err)
> +		goto err_out;
> +
> +	err = xdp_rxq_info_reg_mem_model(&dring->xdp_rxq, MEM_TYPE_PAGE_POOL,
> +					 dring->page_pool);
> +	if (err) {
> +		page_pool_free(dring->page_pool);
> +		goto err_out;
> +	}
>  
>  	return 0;
>  
>  err_out:
> -	return -ENOMEM;
> +	netsec_uninit_pkt_dring(priv, NETSEC_RING_RX);
> +	return err;
>  }

I think you need to move page_pool_free(dring->page_pool) until after
netsec_uninit_pkt_dring() as it use dring->page_pool.

-- 
Best regards,
  Jesper Dangaard Brouer
  MSc.CS, Principal Kernel Engineer at Red Hat
  LinkedIn: http://www.linkedin.com/in/brouer