@@ -4417,6 +4417,7 @@ link_up:
#define E1000_TX_FLAGS_VLAN 0x00000002
#define E1000_TX_FLAGS_TSO 0x00000004
#define E1000_TX_FLAGS_IPV4 0x00000008
+#define E1000_TX_FLAGS_NO_FCS 0x00000010
#define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
#define E1000_TX_FLAGS_VLAN_SHIFT 16
@@ -4681,6 +4682,9 @@ static void e1000_tx_queue(struct e1000_adapter *adapter,
txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
}
+ if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
+ txd_lower &= ~(E1000_TXD_CMD_IFCS);
+
i = tx_ring->next_to_use;
do {
@@ -4698,6 +4702,10 @@ static void e1000_tx_queue(struct e1000_adapter *adapter,
tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
+ /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */
+ if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
+ tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS));
+
/*
* Force memory writes to complete before letting h/w
* know there are new descriptors to fetch. (Only
@@ -4900,6 +4908,9 @@ static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
if (skb->protocol == htons(ETH_P_IP))
tx_flags |= E1000_TX_FLAGS_IPV4;
+ if (unlikely(skb->use_specified_ether_crc))
+ tx_flags |= E1000_TX_FLAGS_NO_FCS;
+
/* if count is 0 then mapping error has occurred */
count = e1000_tx_map(adapter, skb, first, max_per_txd, nr_frags, mss);
if (count) {