1 files changed, 14 insertions, 2 deletions

diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c
index ccb231c4d933..2a0ad9a501bb 100644
--- a/drivers/net/gianfar.c
+++ b/drivers/net/gianfar.c
@@ -949,6 +949,11 @@ static void gfar_detect_errata(struct gfar_private *priv)
                         (pvr == 0x80861010 && (mod & 0xfff9) == 0x80c0))
                 priv->errata |= GFAR_ERRATA_A002;
 
+        /* MPC8313 Rev < 2.0, MPC8548 rev 2.0 */
+        if ((pvr == 0x80850010 && mod == 0x80b0 && rev < 0x0020) ||
+                        (pvr == 0x80210020 && mod == 0x8030 && rev == 0x0020))
+                priv->errata |= GFAR_ERRATA_12;
+
         if (priv->errata)
                 dev_info(dev, "enabled errata workarounds, flags: 0x%x\n",
                          priv->errata);
@@ -2154,8 +2159,15 @@ static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev)
         /* Set up checksumming */
         if (CHECKSUM_PARTIAL == skb->ip_summed) {
                 fcb = gfar_add_fcb(skb);
-                lstatus |= BD_LFLAG(TXBD_TOE);
-                gfar_tx_checksum(skb, fcb);
+                /* as specified by errata */
+                if (unlikely(gfar_has_errata(priv, GFAR_ERRATA_12)
+                             && ((unsigned long)fcb % 0x20) > 0x18)) {
+                        __skb_pull(skb, GMAC_FCB_LEN);
+                        skb_checksum_help(skb);
+                } else {
+                        lstatus |= BD_LFLAG(TXBD_TOE);
+                        gfar_tx_checksum(skb, fcb);
+                }
         }
 
         if (vlan_tx_tag_present(skb)) {