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path: root/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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Diffstat (limited to 'drivers/net/ethernet/stmicro/stmmac/stmmac_main.c')
-rw-r--r--drivers/net/ethernet/stmicro/stmmac/stmmac_main.c20
1 files changed, 16 insertions, 4 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index d16d11bfc046..6e4cbc6ce0ef 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -2831,7 +2831,6 @@ static netdev_tx_t stmmac_tso_xmit(struct sk_buff *skb, struct net_device *dev)
tx_q->tx_skbuff_dma[first_entry].buf = des;
tx_q->tx_skbuff_dma[first_entry].len = skb_headlen(skb);
- tx_q->tx_skbuff[first_entry] = skb;
first->des0 = cpu_to_le32(des);
@@ -2865,6 +2864,14 @@ static netdev_tx_t stmmac_tso_xmit(struct sk_buff *skb, struct net_device *dev)
tx_q->tx_skbuff_dma[tx_q->cur_tx].last_segment = true;
+ /* Only the last descriptor gets to point to the skb. */
+ tx_q->tx_skbuff[tx_q->cur_tx] = skb;
+
+ /* We've used all descriptors we need for this skb, however,
+ * advance cur_tx so that it references a fresh descriptor.
+ * ndo_start_xmit will fill this descriptor the next time it's
+ * called and stmmac_tx_clean may clean up to this descriptor.
+ */
tx_q->cur_tx = STMMAC_GET_ENTRY(tx_q->cur_tx, DMA_TX_SIZE);
if (unlikely(stmmac_tx_avail(priv, queue) <= (MAX_SKB_FRAGS + 1))) {
@@ -2998,8 +3005,6 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
first = desc;
- tx_q->tx_skbuff[first_entry] = skb;
-
enh_desc = priv->plat->enh_desc;
/* To program the descriptors according to the size of the frame */
if (enh_desc)
@@ -3047,8 +3052,15 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
skb->len);
}
- entry = STMMAC_GET_ENTRY(entry, DMA_TX_SIZE);
+ /* Only the last descriptor gets to point to the skb. */
+ tx_q->tx_skbuff[entry] = skb;
+ /* We've used all descriptors we need for this skb, however,
+ * advance cur_tx so that it references a fresh descriptor.
+ * ndo_start_xmit will fill this descriptor the next time it's
+ * called and stmmac_tx_clean may clean up to this descriptor.
+ */
+ entry = STMMAC_GET_ENTRY(entry, DMA_TX_SIZE);
tx_q->cur_tx = entry;
if (netif_msg_pktdata(priv)) {