netdev - [PATCH 2/2] mlx4_en: Handle page allocation failure during receive

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Date:	Mon, 27 Apr 2009 09:42:57 +0300
From:	Yevgeny Petrilin <yevgenyp@...lanox.co.il>
To:	David Miller <davem@...emloft.net>
CC:	netdev@...r.kernel.org, tziporet@...lanox.co.il
Subject: [PATCH 2/2] mlx4_en: Handle page allocation failure during receive

If we failed to allocate new fragments for receive buffer,
the packet should be dropped and packets should be reused.

Signed-off-by: Yevgeny Petrilin <yevgenyp@...lanox.co.il>
---
 drivers/net/mlx4/en_rx.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/net/mlx4/en_rx.c b/drivers/net/mlx4/en_rx.c
index 0cbb78c..7942c4d 100644
--- a/drivers/net/mlx4/en_rx.c
+++ b/drivers/net/mlx4/en_rx.c
@@ -610,6 +610,10 @@ static struct sk_buff *mlx4_en_rx_skb(struct mlx4_en_priv *priv,
 		used_frags = mlx4_en_complete_rx_desc(priv, rx_desc, skb_frags,
 						      skb_shinfo(skb)->frags,
 						      page_alloc, length);
+		if (unlikely(!used_frags)) {
+			kfree_skb(skb);
+			return NULL;
+		}
 		skb_shinfo(skb)->nr_frags = used_frags;

 		/* Copy headers into the skb linear buffer */
-- 


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