2 files changed, 18 insertions, 20 deletions

diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c
index 015ff7906601..da903b3ebfb0 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -107,6 +107,15 @@ static struct flash_spec flash_table[] =
 
 MODULE_DEVICE_TABLE(pci, bnx2_pci_tbl);
 
+static inline u32 bnx2_tx_avail(struct bnx2 *bp)
+{
+        u32 diff = TX_RING_IDX(bp->tx_prod) - TX_RING_IDX(bp->tx_cons);
+
+        if (diff > MAX_TX_DESC_CNT)
+                diff = (diff & MAX_TX_DESC_CNT) - 1;
+        return (bp->tx_ring_size - diff);
+}
+
 static u32
 bnx2_reg_rd_ind(struct bnx2 *bp, u32 offset)
 {
@@ -1338,22 +1347,19 @@ bnx2_tx_int(struct bnx2 *bp)
                 }
         }
 
-        atomic_add(tx_free_bd, &bp->tx_avail_bd);
+        bp->tx_cons = sw_cons;
 
         if (unlikely(netif_queue_stopped(bp->dev))) {
                 unsigned long flags;
 
                 spin_lock_irqsave(&bp->tx_lock, flags);
                 if ((netif_queue_stopped(bp->dev)) &&
-                        (atomic_read(&bp->tx_avail_bd) > MAX_SKB_FRAGS)) {
+                    (bnx2_tx_avail(bp) > MAX_SKB_FRAGS)) {
 
                         netif_wake_queue(bp->dev);
                 }
                 spin_unlock_irqrestore(&bp->tx_lock, flags);
         }
-
-        bp->tx_cons = sw_cons;
-
 }
 
 static inline void
@@ -2971,7 +2977,6 @@ bnx2_init_tx_ring(struct bnx2 *bp)
         bp->tx_prod = 0;
         bp->tx_cons = 0;
         bp->tx_prod_bseq = 0;
-        atomic_set(&bp->tx_avail_bd, bp->tx_ring_size);
         
         val = BNX2_L2CTX_TYPE_TYPE_L2;
         val |= BNX2_L2CTX_TYPE_SIZE_L2;
@@ -4057,9 +4062,7 @@ bnx2_start_xmit(struct sk_buff *skb, struct net_device *dev)
         u16 prod, ring_prod;
         int i;
 
-        if (unlikely(atomic_read(&bp->tx_avail_bd) <
-                (skb_shinfo(skb)->nr_frags + 1))) {
-
+        if (unlikely(bnx2_tx_avail(bp) < (skb_shinfo(skb)->nr_frags + 1))) {
                 netif_stop_queue(dev);
                 printk(KERN_ERR PFX "%s: BUG! Tx ring full when queue awake!\n",
                         dev->name);
@@ -4156,8 +4159,6 @@ bnx2_start_xmit(struct sk_buff *skb, struct net_device *dev)
         prod = NEXT_TX_BD(prod);
         bp->tx_prod_bseq += skb->len;
 
-        atomic_sub(last_frag + 1, &bp->tx_avail_bd);
-
         REG_WR16(bp, MB_TX_CID_ADDR + BNX2_L2CTX_TX_HOST_BIDX, prod);
         REG_WR(bp, MB_TX_CID_ADDR + BNX2_L2CTX_TX_HOST_BSEQ, bp->tx_prod_bseq);
 
@@ -4166,16 +4167,14 @@ bnx2_start_xmit(struct sk_buff *skb, struct net_device *dev)
         bp->tx_prod = prod;
         dev->trans_start = jiffies;
 
-        if (unlikely(atomic_read(&bp->tx_avail_bd) <= MAX_SKB_FRAGS)) {
+        if (unlikely(bnx2_tx_avail(bp) <= MAX_SKB_FRAGS)) {
                 unsigned long flags;
 
                 spin_lock_irqsave(&bp->tx_lock, flags);
-                if (atomic_read(&bp->tx_avail_bd) <= MAX_SKB_FRAGS) {
-                        netif_stop_queue(dev);
-
-                        if (atomic_read(&bp->tx_avail_bd) > MAX_SKB_FRAGS)
-                                netif_wake_queue(dev);
-                }
+                netif_stop_queue(dev);
+                
+                if (bnx2_tx_avail(bp) > MAX_SKB_FRAGS)
+                        netif_wake_queue(dev);
                 spin_unlock_irqrestore(&bp->tx_lock, flags);
         }
 
diff --git a/drivers/net/bnx2.h b/drivers/net/bnx2.h
index e1fb099acbf2..9ad3f5740cd8 100644
--- a/drivers/net/bnx2.h
+++ b/drivers/net/bnx2.h
@@ -3841,12 +3841,12 @@ struct bnx2 {
         struct status_block     *status_blk;
         u32                     last_status_idx;
 
-        atomic_t                tx_avail_bd;
         struct tx_bd            *tx_desc_ring;
         struct sw_bd            *tx_buf_ring;
         u32                     tx_prod_bseq;
         u16                     tx_prod;
         u16                     tx_cons;
+        int                     tx_ring_size;
 
 #ifdef BCM_VLAN 
         struct                  vlan_group *vlgrp;
@@ -3929,7 +3929,6 @@ struct bnx2 {
         u16                     fw_wr_seq;
         u16                     fw_drv_pulse_wr_seq;
 
-        int                     tx_ring_size;
         dma_addr_t              tx_desc_mapping;