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| author | Dale Farnsworth <dale@farnsworth.org> | 2005-09-02 10:25:24 -0700 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2005-09-05 18:08:30 -0400 |
| commit | b111ceb68ac4c44d1a6fa697c55f267fa09b1058 (patch) | |
| tree | 2871ed739a146543646f0e7cf63acd5d16afd0a9 /drivers/net/mv643xx_eth.c | |
| parent | b1dd9ca177bd2ff5260376dd024dd43eb4631dc7 (diff) | |
| download | linux-b111ceb68ac4c44d1a6fa697c55f267fa09b1058.tar.gz linux-b111ceb68ac4c44d1a6fa697c55f267fa09b1058.tar.bz2 linux-b111ceb68ac4c44d1a6fa697c55f267fa09b1058.zip | |
[PATCH] mv643xx: fix outstanding tx skb counter
This patch corrects the accounting of outstanding tx skbs. It fixes
a bug that causes "Error on Queue Full" messages seen since scatter-gather
was enabled by using the hardware tcp/udp checksum generator.
Signed-off-by: Dale Farnsworth <dale@farnsworth.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Diffstat (limited to 'drivers/net/mv643xx_eth.c')
| -rw-r--r-- | drivers/net/mv643xx_eth.c | 24 |
1 files changed, 9 insertions, 15 deletions
diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c index ab74d4583c41..8ea004714648 100644 --- a/drivers/net/mv643xx_eth.c +++ b/drivers/net/mv643xx_eth.c @@ -369,15 +369,6 @@ static int mv643xx_eth_free_tx_queue(struct net_device *dev, dev_kfree_skb_irq(pkt_info.return_info); released = 0; - - /* - * Decrement the number of outstanding skbs counter on - * the TX queue. - */ - if (mp->tx_ring_skbs == 0) - panic("ERROR - TX outstanding SKBs" - " counter is corrupted"); - mp->tx_ring_skbs--; } else dma_unmap_page(NULL, pkt_info.buf_ptr, pkt_info.byte_cnt, DMA_TO_DEVICE); @@ -1042,9 +1033,6 @@ static void mv643xx_tx(struct net_device *dev) DMA_TO_DEVICE); dev_kfree_skb_irq(pkt_info.return_info); - - if (mp->tx_ring_skbs) - mp->tx_ring_skbs--; } else dma_unmap_page(NULL, pkt_info.buf_ptr, pkt_info.byte_cnt, DMA_TO_DEVICE); @@ -1187,7 +1175,6 @@ linear: pkt_info.buf_ptr = dma_map_single(NULL, skb->data, skb->len, DMA_TO_DEVICE); pkt_info.return_info = skb; - mp->tx_ring_skbs++; status = eth_port_send(mp, &pkt_info); if ((status == ETH_ERROR) || (status == ETH_QUEUE_FULL)) printk(KERN_ERR "%s: Error on transmitting packet\n", @@ -1272,7 +1259,6 @@ linear: pkt_info.cmd_sts |= ETH_TX_ENABLE_INTERRUPT | ETH_TX_LAST_DESC; pkt_info.return_info = skb; - mp->tx_ring_skbs++; } else { pkt_info.return_info = 0; } @@ -1309,7 +1295,6 @@ linear: pkt_info.buf_ptr = dma_map_single(NULL, skb->data, skb->len, DMA_TO_DEVICE); pkt_info.return_info = skb; - mp->tx_ring_skbs++; status = eth_port_send(mp, &pkt_info); if ((status == ETH_ERROR) || (status == ETH_QUEUE_FULL)) printk(KERN_ERR "%s: Error on transmitting packet\n", @@ -2526,6 +2511,9 @@ static ETH_FUNC_RET_STATUS eth_port_send(struct mv643xx_private *mp, return ETH_ERROR; } + mp->tx_ring_skbs++; + BUG_ON(mp->tx_ring_skbs > mp->tx_ring_size); + /* Get the Tx Desc ring indexes */ tx_desc_curr = mp->tx_curr_desc_q; tx_desc_used = mp->tx_used_desc_q; @@ -2592,6 +2580,9 @@ static ETH_FUNC_RET_STATUS eth_port_send(struct mv643xx_private *mp, if (mp->tx_resource_err) return ETH_QUEUE_FULL; + mp->tx_ring_skbs++; + BUG_ON(mp->tx_ring_skbs > mp->tx_ring_size); + /* Get the Tx Desc ring indexes */ tx_desc_curr = mp->tx_curr_desc_q; tx_desc_used = mp->tx_used_desc_q; @@ -2692,6 +2683,9 @@ static ETH_FUNC_RET_STATUS eth_tx_return_desc(struct mv643xx_private *mp, /* Any Tx return cancels the Tx resource error status */ mp->tx_resource_err = 0; + BUG_ON(mp->tx_ring_skbs == 0); + mp->tx_ring_skbs--; + return ETH_OK; } |