Merge gregkh@master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6

3 files changed, 49 insertions, 42 deletions

diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c
index db73de0d2511..652eb05a6c2d 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -56,8 +56,8 @@
 
 #define DRV_MODULE_NAME         "bnx2"
 #define PFX DRV_MODULE_NAME     ": "
-#define DRV_MODULE_VERSION      "1.4.43"
-#define DRV_MODULE_RELDATE      "June 28, 2006"
+#define DRV_MODULE_VERSION      "1.4.44"
+#define DRV_MODULE_RELDATE      "August 10, 2006"
 
 #define RUN_AT(x) (jiffies + (x))
 
@@ -209,8 +209,10 @@ 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);
+        u32 diff;
 
+        smp_mb();
+        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);
@@ -1569,7 +1571,7 @@ bnx2_alloc_rx_skb(struct bnx2 *bp, u16 index)
         struct rx_bd *rxbd = &bp->rx_desc_ring[RX_RING(index)][RX_IDX(index)];
         unsigned long align;
 
-        skb = dev_alloc_skb(bp->rx_buf_size);
+        skb = netdev_alloc_skb(bp->dev, bp->rx_buf_size);
         if (skb == NULL) {
                 return -ENOMEM;
         }
@@ -1578,7 +1580,6 @@ bnx2_alloc_rx_skb(struct bnx2 *bp, u16 index)
                 skb_reserve(skb, 8 - align);
         }
 
-        skb->dev = bp->dev;
         mapping = pci_map_single(bp->pdev, skb->data, bp->rx_buf_use_size,
                 PCI_DMA_FROMDEVICE);
 
@@ -1686,15 +1687,20 @@ bnx2_tx_int(struct bnx2 *bp)
         }
 
         bp->tx_cons = sw_cons;
+        /* Need to make the tx_cons update visible to bnx2_start_xmit()
+         * before checking for netif_queue_stopped().  Without the
+         * memory barrier, there is a small possibility that bnx2_start_xmit()
+         * will miss it and cause the queue to be stopped forever.
+         */
+        smp_mb();
 
-        if (unlikely(netif_queue_stopped(bp->dev))) {
-                spin_lock(&bp->tx_lock);
+        if (unlikely(netif_queue_stopped(bp->dev)) &&
+                     (bnx2_tx_avail(bp) > bp->tx_wake_thresh)) {
+                netif_tx_lock(bp->dev);
                 if ((netif_queue_stopped(bp->dev)) &&
-                    (bnx2_tx_avail(bp) > MAX_SKB_FRAGS)) {
-
+                    (bnx2_tx_avail(bp) > bp->tx_wake_thresh))
                         netif_wake_queue(bp->dev);
-                }
-                spin_unlock(&bp->tx_lock);
+                netif_tx_unlock(bp->dev);
         }
 }
 
@@ -1786,7 +1792,7 @@ bnx2_rx_int(struct bnx2 *bp, int budget)
                 if ((bp->dev->mtu > 1500) && (len <= RX_COPY_THRESH)) {
                         struct sk_buff *new_skb;
 
-                        new_skb = dev_alloc_skb(len + 2);
+                        new_skb = netdev_alloc_skb(bp->dev, len + 2);
                         if (new_skb == NULL)
                                 goto reuse_rx;
 
@@ -1797,7 +1803,6 @@ bnx2_rx_int(struct bnx2 *bp, int budget)
 
                         skb_reserve(new_skb, 2);
                         skb_put(new_skb, len);
-                        new_skb->dev = bp->dev;
 
                         bnx2_reuse_rx_skb(bp, skb,
                                 sw_ring_cons, sw_ring_prod);
@@ -3503,6 +3508,8 @@ bnx2_init_tx_ring(struct bnx2 *bp)
         struct tx_bd *txbd;
         u32 val;
 
+        bp->tx_wake_thresh = bp->tx_ring_size / 2;
+
         txbd = &bp->tx_desc_ring[MAX_TX_DESC_CNT];
                 
         txbd->tx_bd_haddr_hi = (u64) bp->tx_desc_mapping >> 32;
@@ -3952,7 +3959,7 @@ bnx2_run_loopback(struct bnx2 *bp, int loopback_mode)
                 return -EINVAL;
 
         pkt_size = 1514;
-        skb = dev_alloc_skb(pkt_size);
+        skb = netdev_alloc_skb(bp->dev, pkt_size);
         if (!skb)
                 return -ENOMEM;
         packet = skb_put(skb, pkt_size);
@@ -4390,10 +4397,8 @@ bnx2_vlan_rx_kill_vid(struct net_device *dev, uint16_t vid)
 #endif
 
 /* Called with netif_tx_lock.
- * hard_start_xmit is pseudo-lockless - a lock is only required when
- * the tx queue is full. This way, we get the benefit of lockless
- * operations most of the time without the complexities to handle
- * netif_stop_queue/wake_queue race conditions.
+ * bnx2_tx_int() runs without netif_tx_lock unless it needs to call
+ * netif_wake_queue().
  */
 static int
 bnx2_start_xmit(struct sk_buff *skb, struct net_device *dev)
@@ -4512,12 +4517,9 @@ bnx2_start_xmit(struct sk_buff *skb, struct net_device *dev)
         dev->trans_start = jiffies;
 
         if (unlikely(bnx2_tx_avail(bp) <= MAX_SKB_FRAGS)) {
-                spin_lock(&bp->tx_lock);
                 netif_stop_queue(dev);
-                
-                if (bnx2_tx_avail(bp) > MAX_SKB_FRAGS)
+                if (bnx2_tx_avail(bp) > bp->tx_wake_thresh)
                         netif_wake_queue(dev);
-                spin_unlock(&bp->tx_lock);
         }
 
         return NETDEV_TX_OK;
@@ -5628,7 +5630,6 @@ bnx2_init_board(struct pci_dev *pdev, struct net_device *dev)
         bp->pdev = pdev;
 
         spin_lock_init(&bp->phy_lock);
-        spin_lock_init(&bp->tx_lock);
         INIT_WORK(&bp->reset_task, bnx2_reset_task, bp);
 
         dev->base_addr = dev->mem_start = pci_resource_start(pdev, 0);
@@ -5751,7 +5752,7 @@ bnx2_init_board(struct pci_dev *pdev, struct net_device *dev)
         bp->mac_addr[5] = (u8) reg;
 
         bp->tx_ring_size = MAX_TX_DESC_CNT;
-        bnx2_set_rx_ring_size(bp, 100);
+        bnx2_set_rx_ring_size(bp, 255);
 
         bp->rx_csum = 1;
 
diff --git a/drivers/net/bnx2.h b/drivers/net/bnx2.h
index 658c5ee95c73..fe804763c607 100644
--- a/drivers/net/bnx2.h
+++ b/drivers/net/bnx2.h
@@ -3890,10 +3890,6 @@ struct bnx2 {
         u32             tx_prod_bseq __attribute__((aligned(L1_CACHE_BYTES)));
         u16             tx_prod;
 
-        struct tx_bd    *tx_desc_ring;
-        struct sw_bd    *tx_buf_ring;
-        int             tx_ring_size;
-
         u16             tx_cons __attribute__((aligned(L1_CACHE_BYTES)));
         u16             hw_tx_cons;
 
@@ -3916,9 +3912,11 @@ struct bnx2 {
         struct sw_bd            *rx_buf_ring;
         struct rx_bd            *rx_desc_ring[MAX_RX_RINGS];
 
-        /* Only used to synchronize netif_stop_queue/wake_queue when tx */
-        /* ring is full */
-        spinlock_t              tx_lock;
+        /* TX constants */
+        struct tx_bd    *tx_desc_ring;
+        struct sw_bd    *tx_buf_ring;
+        int             tx_ring_size;
+        u32             tx_wake_thresh;
 
         /* End of fields used in the performance code paths. */
 
diff --git a/drivers/net/ppp_generic.c b/drivers/net/ppp_generic.c
index 0ec6e9d57b94..c872f7c6cce3 100644
--- a/drivers/net/ppp_generic.c
+++ b/drivers/net/ppp_generic.c
@@ -192,7 +192,7 @@ struct cardmap {
         void *ptr[CARDMAP_WIDTH];
 };
 static void *cardmap_get(struct cardmap *map, unsigned int nr);
-static void cardmap_set(struct cardmap **map, unsigned int nr, void *ptr);
+static int cardmap_set(struct cardmap **map, unsigned int nr, void *ptr);
 static unsigned int cardmap_find_first_free(struct cardmap *map);
 static void cardmap_destroy(struct cardmap **map);
 
@@ -1995,10 +1995,9 @@ ppp_register_channel(struct ppp_channel *chan)
 {
         struct channel *pch;
 
-        pch = kmalloc(sizeof(struct channel), GFP_KERNEL);
+        pch = kzalloc(sizeof(struct channel), GFP_KERNEL);
         if (pch == 0)
                 return -ENOMEM;
-        memset(pch, 0, sizeof(struct channel));
         pch->ppp = NULL;
         pch->chan = chan;
         chan->ppp = pch;
@@ -2408,13 +2407,12 @@ ppp_create_interface(int unit, int *retp)
         int ret = -ENOMEM;
         int i;
 
-        ppp = kmalloc(sizeof(struct ppp), GFP_KERNEL);
+        ppp = kzalloc(sizeof(struct ppp), GFP_KERNEL);
         if (!ppp)
                 goto out;
         dev = alloc_netdev(0, "", ppp_setup);
         if (!dev)
                 goto out1;
-        memset(ppp, 0, sizeof(struct ppp));
 
         ppp->mru = PPP_MRU;
         init_ppp_file(&ppp->file, INTERFACE);
@@ -2454,11 +2452,16 @@ ppp_create_interface(int unit, int *retp)
         }
 
         atomic_inc(&ppp_unit_count);
-        cardmap_set(&all_ppp_units, unit, ppp);
+        ret = cardmap_set(&all_ppp_units, unit, ppp);
+        if (ret != 0)
+                goto out3;
+
         mutex_unlock(&all_ppp_mutex);
         *retp = 0;
         return ppp;
 
+out3:
+        atomic_dec(&ppp_unit_count);
 out2:
         mutex_unlock(&all_ppp_mutex);
         free_netdev(dev);
@@ -2695,7 +2698,7 @@ static void *cardmap_get(struct cardmap *map, unsigned int nr)
         return NULL;
 }
 
-static void cardmap_set(struct cardmap **pmap, unsigned int nr, void *ptr)
+static int cardmap_set(struct cardmap **pmap, unsigned int nr, void *ptr)
 {
         struct cardmap *p;
         int i;
@@ -2704,8 +2707,9 @@ static void cardmap_set(struct cardmap **pmap, unsigned int nr, void *ptr)
         if (p == NULL || (nr >> p->shift) >= CARDMAP_WIDTH) {
                 do {
                         /* need a new top level */
-                        struct cardmap *np = kmalloc(sizeof(*np), GFP_KERNEL);
-                        memset(np, 0, sizeof(*np));
+                        struct cardmap *np = kzalloc(sizeof(*np), GFP_KERNEL);
+                        if (!np)
+                                goto enomem;
                         np->ptr[0] = p;
                         if (p != NULL) {
                                 np->shift = p->shift + CARDMAP_ORDER;
@@ -2719,8 +2723,9 @@ static void cardmap_set(struct cardmap **pmap, unsigned int nr, void *ptr)
         while (p->shift > 0) {
                 i = (nr >> p->shift) & CARDMAP_MASK;
                 if (p->ptr[i] == NULL) {
-                        struct cardmap *np = kmalloc(sizeof(*np), GFP_KERNEL);
-                        memset(np, 0, sizeof(*np));
+                        struct cardmap *np = kzalloc(sizeof(*np), GFP_KERNEL);
+                        if (!np)
+                                goto enomem;
                         np->shift = p->shift - CARDMAP_ORDER;
                         np->parent = p;
                         p->ptr[i] = np;
@@ -2735,6 +2740,9 @@ static void cardmap_set(struct cardmap **pmap, unsigned int nr, void *ptr)
                 set_bit(i, &p->inuse);
         else
                 clear_bit(i, &p->inuse);
+        return 0;
+ enomem:
+        return -ENOMEM;
 }
 
 static unsigned int cardmap_find_first_free(struct cardmap *map)