gianfar v5: implement nfc

This patch adds all missing functionalities for nfc except GRXFH. There is so much code because hardware has not a TCAM.
Further hardware rule space is very limited. So I had to extensively use
optimization features. Both reasons lead to the necessity to hold all
online flows in a linked-list.

Change-log:
# Some suggestions by Joe Perches applied (thanks!)
# Shorted some logs
# Use memcmp() for comparing

Signed-off-by: Sebastian Poehn <sebastian.poehn@belden.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 3 deletions

diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c
index 0c748328ca7b..def7f7efc803 100644
--- a/drivers/net/gianfar.c
+++ b/drivers/net/gianfar.c
@@ -657,6 +657,11 @@ static int gfar_of_init(struct platform_device *ofdev, struct net_device **pdev)
         priv->num_rx_queues = num_rx_qs;
         priv->num_grps = 0x0;
 
+        /* Init Rx queue filer rule set linked list*/
+        INIT_LIST_HEAD(&priv->rx_list.list);
+        priv->rx_list.count = 0;
+        mutex_init(&priv->rx_queue_access);
+
         model = of_get_property(np, "model", NULL);
 
         for (i = 0; i < MAXGROUPS; i++)
@@ -1150,9 +1155,8 @@ static int gfar_probe(struct platform_device *ofdev)
                 priv->rx_queue[i]->rxic = DEFAULT_RXIC;
         }
 
-        /* enable filer if using multiple RX queues*/
-        if(priv->num_rx_queues > 1)
-                priv->rx_filer_enable = 1;
+        /* always enable rx filer*/
+        priv->rx_filer_enable = 1;
         /* Enable most messages by default */
         priv->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;