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    Subject[PATCH v16 09/17] Don't do skb recycle, if device use external buffer.
    Date
    From: Xin Xiaohui <xiaohui.xin@intel.com>

    Signed-off-by: Xin Xiaohui <xiaohui.xin@intel.com>
    Signed-off-by: Zhao Yu <yzhao81new@gmail.com>
    Reviewed-by: Jeff Dike <jdike@linux.intel.com>
    ---
    net/core/skbuff.c | 6 ++++++
    1 files changed, 6 insertions(+), 0 deletions(-)

    diff --git a/net/core/skbuff.c b/net/core/skbuff.c
    index d3ece5c..11833b4 100644
    --- a/net/core/skbuff.c
    +++ b/net/core/skbuff.c
    @@ -550,6 +550,12 @@ bool skb_recycle_check(struct sk_buff *skb, int skb_size)
    if (skb_shared(skb) || skb_cloned(skb))
    return false;

    + /* if the device wants to do mediate passthru, the skb may
    + * get external buffer, so don't recycle
    + */
    + if (dev_is_mpassthru(skb->dev))
    + return 0;
    +
    skb_release_head_state(skb);

    shinfo = skb_shinfo(skb);
    --
    1.7.3


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