ucc_geth: Add support for skb recycling

We can reclaim transmitted skbs to use in the receive path, so-called
skb recycling support.

Also reorder ucc_geth_poll() steps, so that we'll clean tx ring firstly,
thus maybe reclaim some skbs for rx.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/net/ucc_geth.h b/drivers/net/ucc_geth.h
index 195ab267ead7..cfb31afc08a9 100644
--- a/drivers/net/ucc_geth.h
+++ b/drivers/net/ucc_geth.h
@@ -1212,6 +1212,8 @@ struct ucc_geth_private {
         /* index of the first skb which hasn't been transmitted yet. */
         u16 skb_dirtytx[NUM_TX_QUEUES];
 
+        struct sk_buff_head rx_recycle;
+
         struct ugeth_mii_info *mii_info;
         struct phy_device *phydev;
         phy_interface_t phy_interface;