diff options
| -rw-r--r-- | drivers/net/greth.c | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/drivers/net/greth.c b/drivers/net/greth.c index b307696..869e38d 100644 --- a/drivers/net/greth.c +++ b/drivers/net/greth.c @@ -503,7 +503,7 @@ greth_start_xmit_gbit(struct sk_buff *skb, struct net_device *dev) greth->tx_skbuff[curr_tx] = NULL; bdp = greth->tx_bd_base + curr_tx; - status = GRETH_TXBD_CSALL; + status = GRETH_TXBD_CSALL | GRETH_BD_EN; status |= frag->size & GRETH_BD_LEN; /* Wrap around descriptor ring */ @@ -540,26 +540,27 @@ greth_start_xmit_gbit(struct sk_buff *skb, struct net_device *dev) wmb(); - /* Enable the descriptors that we configured ... */ - for (i = 0; i < nr_frags + 1; i++) { - bdp = greth->tx_bd_base + greth->tx_next; - greth_write_bd(&bdp->stat, greth_read_bd(&bdp->stat) | GRETH_BD_EN); - greth->tx_next = NEXT_TX(greth->tx_next); - greth->tx_free--; - } + /* Enable the descriptor chain by enabling the first descriptor */ + bdp = greth->tx_bd_base + greth->tx_next; + greth_write_bd(&bdp->stat, greth_read_bd(&bdp->stat) | GRETH_BD_EN); + greth->tx_next = curr_tx; + greth->tx_free -= nr_frags + 1; + + wmb(); greth_enable_tx(greth); return NETDEV_TX_OK; frag_map_error: - /* Unmap SKB mappings that succeeded */ + /* Unmap SKB mappings that succeeded and disable descriptor */ for (i = 0; greth->tx_next + i != curr_tx; i++) { bdp = greth->tx_bd_base + greth->tx_next + i; dma_unmap_single(greth->dev, greth_read_bd(&bdp->addr), greth_read_bd(&bdp->stat) & GRETH_BD_LEN, DMA_TO_DEVICE); + greth_write_bd(&bdp->stat, 0); } map_error: if (net_ratelimit()) |