diff options
author | Eran Liberty <liberty@extricom.com> | 2010-07-07 15:54:54 -0700 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2010-07-07 15:54:54 -0700 |
commit | acbc0f039ff4b93da737c91937b7c70018ded39f (patch) | |
tree | 8139b01aaaaf6301f246b0c3b468ad8d4e8f55df | |
parent | f29a3d040727a80c3307a2bea057206be049c305 (diff) | |
download | kernel_samsung_smdk4412-acbc0f039ff4b93da737c91937b7c70018ded39f.zip kernel_samsung_smdk4412-acbc0f039ff4b93da737c91937b7c70018ded39f.tar.gz kernel_samsung_smdk4412-acbc0f039ff4b93da737c91937b7c70018ded39f.tar.bz2 |
gianfar: code cleanup
This patch relates to "[PATCH] gainfar.c : skb_over_panic
(kernel-2.6.32.15)"
While in 2.6.32.15 it actually fixed a bug here it merely cleans up
the previous attempts to fix the bug with a more coherent code.
Currently before queuing skb into the rx_recycle it is
"un-skb_reserve"-ed so when taken out in gfar_new_skb() it wont be
reserved twice.
This patch makes sure the alignment skb_reserve is done once, upon
allocating the skb and not when taken out of the rx_recycle
pool. Eliminating the need to undo anything before queue skb back to
the pool.
NOTE: This patch will compile and is fairly straight forward but I do
not have environment to test it as I did with the 2.6.32.15 fix.
Signed-off-by: Eran Liberty <liberty@extricom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r-- | drivers/net/gianfar.c | 54 |
1 files changed, 27 insertions, 27 deletions
diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c index fccb7a3..746a776 100644 --- a/drivers/net/gianfar.c +++ b/drivers/net/gianfar.c @@ -2420,6 +2420,15 @@ static void gfar_timeout(struct net_device *dev) schedule_work(&priv->reset_task); } +static void gfar_align_skb(struct sk_buff *skb) +{ + /* We need the data buffer to be aligned properly. We will reserve + * as many bytes as needed to align the data properly + */ + skb_reserve(skb, RXBUF_ALIGNMENT - + (((unsigned long) skb->data) & (RXBUF_ALIGNMENT - 1))); +} + /* Interrupt Handler for Transmit complete */ static int gfar_clean_tx_ring(struct gfar_priv_tx_q *tx_queue) { @@ -2504,9 +2513,10 @@ static int gfar_clean_tx_ring(struct gfar_priv_tx_q *tx_queue) */ if (skb_queue_len(&priv->rx_recycle) < rx_queue->rx_ring_size && skb_recycle_check(skb, priv->rx_buffer_size + - RXBUF_ALIGNMENT)) + RXBUF_ALIGNMENT)) { + gfar_align_skb(skb); __skb_queue_head(&priv->rx_recycle, skb); - else + } else dev_kfree_skb_any(skb); tx_queue->tx_skbuff[skb_dirtytx] = NULL; @@ -2569,29 +2579,28 @@ static void gfar_new_rxbdp(struct gfar_priv_rx_q *rx_queue, struct rxbd8 *bdp, gfar_init_rxbdp(rx_queue, bdp, buf); } - -struct sk_buff * gfar_new_skb(struct net_device *dev) +static struct sk_buff * gfar_alloc_skb(struct net_device *dev) { - unsigned int alignamount; struct gfar_private *priv = netdev_priv(dev); struct sk_buff *skb = NULL; - skb = __skb_dequeue(&priv->rx_recycle); - if (!skb) - skb = netdev_alloc_skb(dev, - priv->rx_buffer_size + RXBUF_ALIGNMENT); - + skb = netdev_alloc_skb(dev, priv->rx_buffer_size + RXBUF_ALIGNMENT); if (!skb) return NULL; - alignamount = RXBUF_ALIGNMENT - - (((unsigned long) skb->data) & (RXBUF_ALIGNMENT - 1)); + gfar_align_skb(skb); - /* We need the data buffer to be aligned properly. We will reserve - * as many bytes as needed to align the data properly - */ - skb_reserve(skb, alignamount); - GFAR_CB(skb)->alignamount = alignamount; + return skb; +} + +struct sk_buff * gfar_new_skb(struct net_device *dev) +{ + struct gfar_private *priv = netdev_priv(dev); + struct sk_buff *skb = NULL; + + skb = __skb_dequeue(&priv->rx_recycle); + if (!skb) + skb = gfar_alloc_skb(dev); return skb; } @@ -2744,17 +2753,8 @@ int gfar_clean_rx_ring(struct gfar_priv_rx_q *rx_queue, int rx_work_limit) if (unlikely(!newskb)) newskb = skb; - else if (skb) { - /* - * We need to un-reserve() the skb to what it - * was before gfar_new_skb() re-aligned - * it to an RXBUF_ALIGNMENT boundary - * before we put the skb back on the - * recycle list. - */ - skb_reserve(skb, -GFAR_CB(skb)->alignamount); + else if (skb) __skb_queue_head(&priv->rx_recycle, skb); - } } else { /* Increment the number of packets */ rx_queue->stats.rx_packets++; |