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-rw-r--r--drivers/net/skge.c20
-rw-r--r--drivers/net/skge.h1
2 files changed, 10 insertions, 11 deletions
diff --git a/drivers/net/skge.c b/drivers/net/skge.c
index a261766bc052..a6f42fc85738 100644
--- a/drivers/net/skge.c
+++ b/drivers/net/skge.c
@@ -847,8 +847,7 @@ static void skge_link_up(struct skge_port *skge)
LED_BLK_OFF|LED_SYNC_OFF|LED_ON);
netif_carrier_on(skge->netdev);
- if (skge->tx_avail > MAX_SKB_FRAGS + 1)
- netif_wake_queue(skge->netdev);
+ netif_wake_queue(skge->netdev);
if (netif_msg_link(skge))
printk(KERN_INFO PFX
@@ -2190,8 +2189,6 @@ static int skge_up(struct net_device *dev)
if (err)
goto free_rx_ring;
- skge->tx_avail = skge->tx_ring.count - 1;
-
/* Initialize MAC */
spin_lock_bh(&hw->phy_lock);
if (hw->chip_id == CHIP_ID_GENESIS)
@@ -2294,6 +2291,12 @@ static int skge_down(struct net_device *dev)
return 0;
}
+static inline int skge_avail(const struct skge_ring *ring)
+{
+ return ((ring->to_clean > ring->to_use) ? 0 : ring->count)
+ + (ring->to_clean - ring->to_use) - 1;
+}
+
static int skge_xmit_frame(struct sk_buff *skb, struct net_device *dev)
{
struct skge_port *skge = netdev_priv(dev);
@@ -2314,7 +2317,7 @@ static int skge_xmit_frame(struct sk_buff *skb, struct net_device *dev)
return NETDEV_TX_LOCKED;
}
- if (unlikely(skge->tx_avail < skb_shinfo(skb)->nr_frags +1)) {
+ if (unlikely(skge_avail(&skge->tx_ring) < skb_shinfo(skb)->nr_frags + 1)) {
if (!netif_queue_stopped(dev)) {
netif_stop_queue(dev);
@@ -2390,8 +2393,7 @@ static int skge_xmit_frame(struct sk_buff *skb, struct net_device *dev)
dev->name, e - ring->start, skb->len);
ring->to_use = e->next;
- skge->tx_avail -= skb_shinfo(skb)->nr_frags + 1;
- if (skge->tx_avail <= MAX_SKB_FRAGS + 1) {
+ if (skge_avail(&skge->tx_ring) <= MAX_SKB_FRAGS + 1) {
pr_debug("%s: transmit queue full\n", dev->name);
netif_stop_queue(dev);
}
@@ -2416,14 +2418,12 @@ static void skge_tx_complete(struct skge_port *skge, struct skge_element *last)
e->skb = NULL;
pci_unmap_single(pdev, pci_unmap_addr(e, mapaddr),
skb_headlen(skb), PCI_DMA_TODEVICE);
- ++skge->tx_avail;
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
e = e->next;
pci_unmap_page(pdev, pci_unmap_addr(e, mapaddr),
skb_shinfo(skb)->frags[i].size,
PCI_DMA_TODEVICE);
- ++skge->tx_avail;
}
dev_kfree_skb(skb);
@@ -2688,7 +2688,7 @@ static void skge_tx_done(struct skge_port *skge)
skge_write8(skge->hw, Q_ADDR(txqaddr[skge->port], Q_CSR), CSR_IRQ_CL_F);
- if (skge->tx_avail > MAX_SKB_FRAGS + 1)
+ if (skge_avail(&skge->tx_ring) > MAX_SKB_FRAGS + 1)
netif_wake_queue(skge->netdev);
spin_unlock(&skge->tx_lock);
diff --git a/drivers/net/skge.h b/drivers/net/skge.h
index 2efdacc290e5..1f1ce88c8186 100644
--- a/drivers/net/skge.h
+++ b/drivers/net/skge.h
@@ -2418,7 +2418,6 @@ struct skge_port {
int port;
spinlock_t tx_lock;
- u32 tx_avail;
struct skge_ring tx_ring;
struct skge_ring rx_ring;