2 files changed, 21 insertions, 12 deletions

diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c
index 0405e1f0d3df..fb6b232069d6 100644
--- a/drivers/net/mv643xx_eth.c
+++ b/drivers/net/mv643xx_eth.c
@@ -1157,16 +1157,20 @@ static int mv643xx_eth_start_xmit(struct sk_buff *skb, struct net_device *dev)
         if (!skb_shinfo(skb)->nr_frags) {
 linear:
                 if (skb->ip_summed != CHECKSUM_HW) {
+                        /* Errata BTS #50, IHL must be 5 if no HW checksum */
                         pkt_info.cmd_sts = ETH_TX_ENABLE_INTERRUPT |
-                                        ETH_TX_FIRST_DESC | ETH_TX_LAST_DESC;
+                                           ETH_TX_FIRST_DESC |
+                                           ETH_TX_LAST_DESC |
+                                           5 << ETH_TX_IHL_SHIFT;
                         pkt_info.l4i_chk = 0;
                 } else {
-                        u32 ipheader = skb->nh.iph->ihl << 11;
 
                         pkt_info.cmd_sts = ETH_TX_ENABLE_INTERRUPT |
-                                        ETH_TX_FIRST_DESC | ETH_TX_LAST_DESC |
-                                        ETH_GEN_TCP_UDP_CHECKSUM |
-                                        ETH_GEN_IP_V_4_CHECKSUM | ipheader;
+                                           ETH_TX_FIRST_DESC |
+                                           ETH_TX_LAST_DESC |
+                                           ETH_GEN_TCP_UDP_CHECKSUM |
+                                           ETH_GEN_IP_V_4_CHECKSUM |
+                                           skb->nh.iph->ihl << ETH_TX_IHL_SHIFT;
                         /* CPU already calculated pseudo header checksum. */
                         if (skb->nh.iph->protocol == IPPROTO_UDP) {
                                 pkt_info.cmd_sts |= ETH_UDP_FRAME;
@@ -1193,7 +1197,6 @@ linear:
                 stats->tx_bytes += pkt_info.byte_cnt;
         } else {
                 unsigned int frag;
-                u32 ipheader;
 
                 /* Since hardware can't handle unaligned fragments smaller
                  * than 9 bytes, if we find any, we linearize the skb
@@ -1222,12 +1225,16 @@ linear:
                                                         DMA_TO_DEVICE);
                 pkt_info.l4i_chk = 0;
                 pkt_info.return_info = 0;
-                pkt_info.cmd_sts = ETH_TX_FIRST_DESC;
 
-                if (skb->ip_summed == CHECKSUM_HW) {
-                        ipheader = skb->nh.iph->ihl << 11;
-                        pkt_info.cmd_sts |= ETH_GEN_TCP_UDP_CHECKSUM |
-                                        ETH_GEN_IP_V_4_CHECKSUM | ipheader;
+                if (skb->ip_summed != CHECKSUM_HW)
+                        /* Errata BTS #50, IHL must be 5 if no HW checksum */
+                        pkt_info.cmd_sts = ETH_TX_FIRST_DESC |
+                                           5 << ETH_TX_IHL_SHIFT;
+                else {
+                        pkt_info.cmd_sts = ETH_TX_FIRST_DESC |
+                                           ETH_GEN_TCP_UDP_CHECKSUM |
+                                           ETH_GEN_IP_V_4_CHECKSUM |
+                                           skb->nh.iph->ihl << ETH_TX_IHL_SHIFT;
                         /* CPU already calculated pseudo header checksum. */
                         if (skb->nh.iph->protocol == IPPROTO_UDP) {
                                 pkt_info.cmd_sts |= ETH_UDP_FRAME;
diff --git a/drivers/net/mv643xx_eth.h b/drivers/net/mv643xx_eth.h
index 57c4f8fbfdb6..7678b59c2952 100644
--- a/drivers/net/mv643xx_eth.h
+++ b/drivers/net/mv643xx_eth.h
@@ -49,7 +49,7 @@
 /* Checksum offload for Tx works for most packets, but
  * fails if previous packet sent did not use hw csum
  */
-#undef  MV643XX_CHECKSUM_OFFLOAD_TX
+#define MV643XX_CHECKSUM_OFFLOAD_TX
 #define MV643XX_NAPI
 #define MV643XX_TX_FAST_REFILL
 #undef  MV643XX_RX_QUEUE_FILL_ON_TASK   /* Does not work, yet */
@@ -217,6 +217,8 @@
 #define ETH_TX_ENABLE_INTERRUPT                 (BIT23)
 #define ETH_AUTO_MODE                           (BIT30)
 
+#define ETH_TX_IHL_SHIFT                        11
+
 /* typedefs */
 
 typedef enum _eth_func_ret_status {