netdev - Re: [PATCH 13/14] mlx4_en: Moving to work with GRO

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Date:	Sat, 28 Aug 2010 12:56:14 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Yevgeny Petrilin <yevgenyp@...lanox.co.il>
Cc:	davem@...emloft.net, netdev@...r.kernel.org, eugenia@...lanox.co.il
Subject: Re: [PATCH 13/14] mlx4_en: Moving to work with GRO

Le mardi 24 août 2010 à 16:46 +0300, Yevgeny Petrilin a écrit :
> Signed-off-by: Yevgeny Petrilin <yevgenyp@...lanox.co.il>
> ---
>  drivers/net/mlx4/en_ethtool.c |   58 +---------------------------------
>  drivers/net/mlx4/en_main.c    |    5 ---
>  drivers/net/mlx4/en_netdev.c  |    3 +-
>  drivers/net/mlx4/en_rx.c      |   68 ++++++++---------------------------------
>  drivers/net/mlx4/en_tx.c      |    1 +
>  drivers/net/mlx4/mlx4_en.h    |    6 ---
>  6 files changed, 17 insertions(+), 124 deletions(-)
> 



>  err_hwq:
>  	mlx4_free_hwq_res(mdev->dev, &ring->wqres, ring->buf_size);
>  err_ring:
> @@ -412,7 +380,6 @@ void mlx4_en_destroy_rx_ring(struct mlx4_en_priv *priv,
>  {
>  	struct mlx4_en_dev *mdev = priv->mdev;
>  
> -	kfree(ring->lro.lro_arr);
>  	mlx4_en_unmap_buffer(&ring->wqres.buf);
>  	mlx4_free_hwq_res(mdev->dev, &ring->wqres, ring->buf_size + TXBB_SIZE);
>  	vfree(ring->rx_info);
> @@ -563,7 +530,6 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
>  	struct mlx4_cqe *cqe;
>  	struct mlx4_en_rx_ring *ring = &priv->rx_ring[cq->ring];
>  	struct skb_frag_struct *skb_frags;
> -	struct skb_frag_struct lro_frags[MLX4_EN_MAX_RX_FRAGS];
>  	struct mlx4_en_rx_desc *rx_desc;
>  	struct sk_buff *skb;
>  	int index;
> @@ -623,37 +589,33 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
>  				 * - TCP/IP (v4)
>  				 * - without IP options
>  				 * - not an IP fragment */
> -				if (mlx4_en_can_lro(cqe->status) &&
> -				    dev->features & NETIF_F_LRO) {
> +				if (dev->features & NETIF_F_GRO) {
> +					struct sk_buff *gro_skb = napi_get_frags(&cq->napi);
>  

napi_get_frags() can return NULL, please fix your driver.

>  					nr = mlx4_en_complete_rx_desc(
>  						priv, rx_desc,
> -						skb_frags, lro_frags,
> +						skb_frags, skb_shinfo(gro_skb)->frags,
>  						ring->page_alloc, length);
>  					if (!nr)
>  						goto next;
>  


Thanks


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