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ftmac100: fix skb truesize underestimation 

ftmac100 allocates a page per skb fragment. We must account
PAGE_SIZE increments on skb->truesize, not the actual frag length.

If frame is under 64 bytes, page is freed, so increase truesize only for
bigger frames.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Po-Yu Chuang <ratbert@faraday-tech.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2011-10-13 11:20:08 +00:00 committed by David S. Miller
parent e7e5a4033f
commit 96cd895168
1 changed files with 4 additions and 1 deletions
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5
drivers/net/ethernet/faraday/ftmac100.c
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@ -439,7 +439,10 @@ static bool ftmac100_rx_packet(struct ftmac100 *priv, int *processed)
skb_fill_page_desc(skb, 0, page, 0, length);
skb->len += length;
skb->data_len += length;
skb->truesize += length;
/* page might be freed in __pskb_pull_tail() */
if (length > 64)
skb->truesize += PAGE_SIZE;
__pskb_pull_tail(skb, min(length, 64));
ftmac100_alloc_rx_page(priv, rxdes, GFP_ATOMIC);