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Message-ID: <1318540808.2533.27.camel@edumazet-laptop> Date: Thu, 13 Oct 2011 23:20:08 +0200 From: Eric Dumazet <eric.dumazet@...il.com> To: David Miller <davem@...emloft.net> Cc: netdev <netdev@...r.kernel.org>, Po-Yu Chuang <ratbert@...aday-tech.com> Subject: [PATCH net-next] 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@...il.com> CC: Po-Yu Chuang <ratbert@...aday-tech.com> --- drivers/net/ethernet/faraday/ftmac100.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/faraday/ftmac100.c b/drivers/net/ethernet/faraday/ftmac100.c index 9bd7746..a127cb2 100644 --- a/drivers/net/ethernet/faraday/ftmac100.c +++ b/drivers/net/ethernet/faraday/ftmac100.c @@ -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); -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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