Staging: sxg: Add checksum control option through ethtool interface

* This patch adds support for controling checksum feature using the ethtool
  interface.

Signed-off-by: LinSysSoft Sahara Team <saharaproj@linsyssoft.com>
Signed-off-by: Mithlesh Thukral <mithlesh@linsyssoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/sxg/sxg.c b/drivers/staging/sxg/sxg.c
index 09ff800..d52212a 100644 (file)
--- a/drivers/staging/sxg/sxg.c
+++ b/drivers/staging/sxg/sxg.c
@@ -1486,23 +1486,25 @@ static int sxg_process_isr(struct adapter_t *adapter, u32 MessageId)
  * sxg_rcv_checksum - Set the checksum for received packet
  *
  * Arguements:
+ *             @adapter - Adapter structure on which packet is received
  *             @skb - Packet which is receieved
  *             @Event - Event read from hardware
  */
 
-void sxg_rcv_checksum(struct sk_buff *skb, struct sxg_event *Event)
+void sxg_rcv_checksum(struct adapter_t *adapter, struct sk_buff *skb,
+                        struct sxg_event *Event)
 {
        skb->ip_summed = CHECKSUM_NONE;
-       if(Event->Status & EVENT_STATUS_TCPIP) {
-               if(!(Event->Status & EVENT_STATUS_TCPBAD)) {
-                       skb->ip_summed = CHECKSUM_UNNECESSARY;
-               }
-               if(!(Event->Status & EVENT_STATUS_IPBAD)) {
-                       skb->ip_summed = CHECKSUM_UNNECESSARY;
-               }
-       } else if(Event->Status & EVENT_STATUS_IPONLY) {
-               if(!(Event->Status & EVENT_STATUS_IPBAD)) {
+       if (likely(adapter->flags & SXG_RCV_IP_CSUM_ENABLED)) {
+               if (likely(adapter->flags & SXG_RCV_TCP_CSUM_ENABLED)
+                       && (Event->Status & EVENT_STATUS_TCPIP)) {
+                       if(!(Event->Status & EVENT_STATUS_TCPBAD))
+                               skb->ip_summed = CHECKSUM_UNNECESSARY;
+               if(!(Event->Status & EVENT_STATUS_IPBAD))
                        skb->ip_summed = CHECKSUM_UNNECESSARY;
+               } else if(Event->Status & EVENT_STATUS_IPONLY) {
+                       if(!(Event->Status & EVENT_STATUS_IPBAD))
+                               skb->ip_summed = CHECKSUM_UNNECESSARY;
                }
        }
 }
@@ -1581,7 +1583,7 @@ static u32 sxg_process_event_queue(struct adapter_t *adapter, u32 RssId,
                                rx_bytes = Event->Length;
                                adapter->stats.rx_packets++;
                                adapter->stats.rx_bytes += rx_bytes;
-                               sxg_rcv_checksum(skb, Event);
+                               sxg_rcv_checksum(adapter, skb, Event);
                                skb->dev = adapter->netdev;
                                netif_receive_skb(skb);
 #endif

diff --git a/drivers/staging/sxg/sxg_ethtool.c b/drivers/staging/sxg/sxg_ethtool.c
index 8c710f4..97f765d 100644 (file)
--- a/drivers/staging/sxg/sxg_ethtool.c
+++ b/drivers/staging/sxg/sxg_ethtool.c
@@ -221,7 +221,7 @@ static int sxg_nic_get_settings(struct net_device *netdev,
 static u32 sxg_nic_get_rx_csum(struct net_device *netdev)
 {
        struct adapter_t *adapter = netdev_priv(netdev);
-       return ((adapter->flags & SXG_RCV_IP_CSUM_ENABLED) ||
+       return ((adapter->flags & SXG_RCV_IP_CSUM_ENABLED) &&
                 (adapter->flags & SXG_RCV_TCP_CSUM_ENABLED));
 }
 
@@ -232,9 +232,10 @@ static int sxg_nic_set_rx_csum(struct net_device *netdev, u32 data)
                adapter->flags |= SXG_RCV_IP_CSUM_ENABLED;
        else
                adapter->flags &= ~SXG_RCV_IP_CSUM_ENABLED;
-
-       /* Reset the card here (call the reset functions .. currently unavailable)*/
-
+       /*
+        * We dont need to write to the card to do checksums.
+        * It does it anyways.
+        */
        return 0;
 }