Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp

Conflicts:
	litmus/sched_cedf.c

1 files changed, 85 insertions, 198 deletions

diff --git a/drivers/net/tulip/xircom_cb.c b/drivers/net/tulip/xircom_cb.c
index a439e93be22d..988b8eb24d37 100644
--- a/drivers/net/tulip/xircom_cb.c
+++ b/drivers/net/tulip/xircom_cb.c
@@ -29,7 +29,6 @@
 #include <linux/skbuff.h>
 #include <linux/delay.h>
 #include <linux/init.h>
-#include <linux/ethtool.h>
 #include <linux/bitops.h>
 
 #include <asm/uaccess.h>
@@ -38,15 +37,6 @@
 #include <asm/irq.h>
 #endif
 
-#ifdef DEBUG
-#define enter(x)   printk("Enter: %s, %s line %i\n",x,__FILE__,__LINE__)
-#define leave(x)   printk("Leave: %s, %s line %i\n",x,__FILE__,__LINE__)
-#else
-#define enter(x)   do {} while (0)
-#define leave(x)   do {} while (0)
-#endif
-
-
 MODULE_DESCRIPTION("Xircom Cardbus ethernet driver");
 MODULE_AUTHOR("Arjan van de Ven <arjanv@redhat.com>");
 MODULE_LICENSE("GPL");
@@ -162,7 +152,7 @@ static struct pci_driver xircom_ops = {
 };
 
 
-#ifdef DEBUG
+#if defined DEBUG && DEBUG > 1
 static void print_binary(unsigned int number)
 {
         int i,i2;
@@ -177,23 +167,10 @@ static void print_binary(unsigned int number)
                 if ((i&3)==0)
                         buffer[i2++]=' ';
         }
-        printk("%s\n",buffer);
+        pr_debug("%s\n",buffer);
 }
 #endif
 
-static void netdev_get_drvinfo(struct net_device *dev,
-                               struct ethtool_drvinfo *info)
-{
-        struct xircom_private *private = netdev_priv(dev);
-
-        strcpy(info->driver, "xircom_cb");
-        strcpy(info->bus_info, pci_name(private->pdev));
-}
-
-static const struct ethtool_ops netdev_ethtool_ops = {
-        .get_drvinfo            = netdev_get_drvinfo,
-};
-
 static const struct net_device_ops netdev_ops = {
         .ndo_open               = xircom_open,
         .ndo_stop               = xircom_close,
@@ -219,7 +196,6 @@ static int __devinit xircom_probe(struct pci_dev *pdev, const struct pci_device_
         struct xircom_private *private;
         unsigned long flags;
         unsigned short tmp16;
-        enter("xircom_probe");
 
         /* First do the PCI initialisation */
 
@@ -279,7 +255,6 @@ static int __devinit xircom_probe(struct pci_dev *pdev, const struct pci_device_
         setup_descriptors(private);
 
         dev->netdev_ops = &netdev_ops;
-        SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
         pci_set_drvdata(pdev, dev);
 
         if (register_netdev(dev)) {
@@ -287,8 +262,8 @@ static int __devinit xircom_probe(struct pci_dev *pdev, const struct pci_device_
                 goto reg_fail;
         }
 
-        dev_info(&dev->dev, "Xircom cardbus revision %i at irq %i\n",
-                 pdev->revision, pdev->irq);
+        netdev_info(dev, "Xircom cardbus revision %i at irq %i\n",
+                    pdev->revision, pdev->irq);
         /* start the transmitter to get a heartbeat */
         /* TODO: send 2 dummy packets here */
         transceiver_voodoo(private);
@@ -300,7 +275,6 @@ static int __devinit xircom_probe(struct pci_dev *pdev, const struct pci_device_
 
         trigger_receive(private);
 
-        leave("xircom_probe");
         return 0;
 
 reg_fail:
@@ -325,7 +299,6 @@ static void __devexit xircom_remove(struct pci_dev *pdev)
         struct net_device *dev = pci_get_drvdata(pdev);
         struct xircom_private *card = netdev_priv(dev);
 
-        enter("xircom_remove");
         pci_free_consistent(pdev,8192,card->rx_buffer,card->rx_dma_handle);
         pci_free_consistent(pdev,8192,card->tx_buffer,card->tx_dma_handle);
 
@@ -333,7 +306,6 @@ static void __devexit xircom_remove(struct pci_dev *pdev)
         unregister_netdev(dev);
         free_netdev(dev);
         pci_set_drvdata(pdev, NULL);
-        leave("xircom_remove");
 }
 
 static irqreturn_t xircom_interrupt(int irq, void *dev_instance)
@@ -343,17 +315,15 @@ static irqreturn_t xircom_interrupt(int irq, void *dev_instance)
         unsigned int status;
         int i;
 
-        enter("xircom_interrupt\n");
-
         spin_lock(&card->lock);
         status = inl(card->io_port+CSR5);
 
-#ifdef DEBUG
+#if defined DEBUG && DEBUG > 1
         print_binary(status);
-        printk("tx status 0x%08x 0x%08x\n",
-               card->tx_buffer[0], card->tx_buffer[4]);
-        printk("rx status 0x%08x 0x%08x\n",
-               card->rx_buffer[0], card->rx_buffer[4]);
+        pr_debug("tx status 0x%08x 0x%08x\n",
+                 card->tx_buffer[0], card->tx_buffer[4]);
+        pr_debug("rx status 0x%08x 0x%08x\n",
+                 card->rx_buffer[0], card->rx_buffer[4]);
 #endif
         /* Handle shared irq and hotplug */
         if (status == 0 || status == 0xffffffff) {
@@ -363,9 +333,9 @@ static irqreturn_t xircom_interrupt(int irq, void *dev_instance)
 
         if (link_status_changed(card)) {
                 int newlink;
-                printk(KERN_DEBUG "xircom_cb: Link status has changed\n");
+                netdev_dbg(dev, "Link status has changed\n");
                 newlink = link_status(card);
-                dev_info(&dev->dev, "Link is %i mbit\n", newlink);
+                netdev_info(dev, "Link is %d mbit\n", newlink);
                 if (newlink)
                         netif_carrier_on(dev);
                 else
@@ -384,9 +354,7 @@ static irqreturn_t xircom_interrupt(int irq, void *dev_instance)
         for (i=0;i<NUMDESCRIPTORS;i++)
                 investigate_read_descriptor(dev,card,i,bufferoffsets[i]);
 
-
         spin_unlock(&card->lock);
-        leave("xircom_interrupt");
         return IRQ_HANDLED;
 }
 
@@ -397,7 +365,6 @@ static netdev_tx_t xircom_start_xmit(struct sk_buff *skb,
         unsigned long flags;
         int nextdescriptor;
         int desc;
-        enter("xircom_start_xmit");
 
         card = netdev_priv(dev);
         spin_lock_irqsave(&card->lock,flags);
@@ -439,13 +406,10 @@ static netdev_tx_t xircom_start_xmit(struct sk_buff *skb,
                                 netif_stop_queue(dev);
                         }
                         card->transmit_used = nextdescriptor;
-                        leave("xircom-start_xmit - sent");
                         spin_unlock_irqrestore(&card->lock,flags);
                         return NETDEV_TX_OK;
         }
 
-
-
         /* Uh oh... no free descriptor... drop the packet */
         netif_stop_queue(dev);
         spin_unlock_irqrestore(&card->lock,flags);
@@ -461,18 +425,16 @@ static int xircom_open(struct net_device *dev)
 {
         struct xircom_private *xp = netdev_priv(dev);
         int retval;
-        enter("xircom_open");
-        pr_info("xircom cardbus adaptor found, registering as %s, using irq %i\n",
-                dev->name, dev->irq);
+
+        netdev_info(dev, "xircom cardbus adaptor found, using irq %i\n",
+                    dev->irq);
         retval = request_irq(dev->irq, xircom_interrupt, IRQF_SHARED, dev->name, dev);
-        if (retval) {
-                leave("xircom_open - No IRQ");
+        if (retval)
                 return retval;
-        }
 
         xircom_up(xp);
         xp->open = 1;
-        leave("xircom_open");
+
         return 0;
 }
 
@@ -481,7 +443,6 @@ static int xircom_close(struct net_device *dev)
         struct xircom_private *card;
         unsigned long flags;
 
-        enter("xircom_close");
         card = netdev_priv(dev);
         netif_stop_queue(dev); /* we don't want new packets */
 
@@ -501,8 +462,6 @@ static int xircom_close(struct net_device *dev)
         card->open = 0;
         free_irq(dev->irq,dev);
 
-        leave("xircom_close");
-
         return 0;
 
 }
@@ -522,8 +481,6 @@ static void initialize_card(struct xircom_private *card)
 {
         unsigned int val;
         unsigned long flags;
-        enter("initialize_card");
-
 
         spin_lock_irqsave(&card->lock, flags);
 
@@ -549,8 +506,6 @@ static void initialize_card(struct xircom_private *card)
         deactivate_transmitter(card);
 
         spin_unlock_irqrestore(&card->lock, flags);
-
-        leave("initialize_card");
 }
 
 /*
@@ -562,12 +517,9 @@ ignored; I chose zero.
 static void trigger_transmit(struct xircom_private *card)
 {
         unsigned int val;
-        enter("trigger_transmit");
 
         val = 0;
         outl(val, card->io_port + CSR1);
-
-        leave("trigger_transmit");
 }
 
 /*
@@ -580,12 +532,9 @@ ignored; I chose zero.
 static void trigger_receive(struct xircom_private *card)
 {
         unsigned int val;
-        enter("trigger_receive");
 
         val = 0;
         outl(val, card->io_port + CSR2);
-
-        leave("trigger_receive");
 }
 
 /*
@@ -596,8 +545,6 @@ static void setup_descriptors(struct xircom_private *card)
 {
         u32 address;
         int i;
-        enter("setup_descriptors");
-
 
         BUG_ON(card->rx_buffer == NULL);
         BUG_ON(card->tx_buffer == NULL);
@@ -651,8 +598,6 @@ static void setup_descriptors(struct xircom_private *card)
         /* wite the transmit descriptor ring to the card */
         address = card->tx_dma_handle;
         outl(address, card->io_port + CSR4);    /* xmit descr list address */
-
-        leave("setup_descriptors");
 }
 
 /*
@@ -662,13 +607,10 @@ valid by setting the address in the card to 0x00.
 static void remove_descriptors(struct xircom_private *card)
 {
         unsigned int val;
-        enter("remove_descriptors");
 
         val = 0;
         outl(val, card->io_port + CSR3);        /* Receive descriptor address */
         outl(val, card->io_port + CSR4);        /* Send descriptor address */
-
-        leave("remove_descriptors");
 }
 
 /*
@@ -680,21 +622,17 @@ This function also clears the status-bit.
 static int link_status_changed(struct xircom_private *card)
 {
         unsigned int val;
-        enter("link_status_changed");
 
         val = inl(card->io_port + CSR5);        /* Status register */
 
-        if ((val & (1 << 27)) == 0) {   /* no change */
-                leave("link_status_changed - nochange");
+        if ((val & (1 << 27)) == 0)             /* no change */
                 return 0;
-        }
 
         /* clear the event by writing a 1 to the bit in the
            status register. */
         val = (1 << 27);
         outl(val, card->io_port + CSR5);
 
-        leave("link_status_changed - changed");
         return 1;
 }
 
@@ -706,16 +644,12 @@ in a non-stopped state.
 static int transmit_active(struct xircom_private *card)
 {
         unsigned int val;
-        enter("transmit_active");
 
         val = inl(card->io_port + CSR5);        /* Status register */
 
-        if ((val & (7 << 20)) == 0) {   /* transmitter disabled */
-                leave("transmit_active - inactive");
+        if ((val & (7 << 20)) == 0)             /* transmitter disabled */
                 return 0;
-        }
 
-        leave("transmit_active - active");
         return 1;
 }
 
@@ -726,17 +660,12 @@ in a non-stopped state.
 static int receive_active(struct xircom_private *card)
 {
         unsigned int val;
-        enter("receive_active");
-
 
         val = inl(card->io_port + CSR5);        /* Status register */
 
-        if ((val & (7 << 17)) == 0) {   /* receiver disabled */
-                leave("receive_active - inactive");
+        if ((val & (7 << 17)) == 0)             /* receiver disabled */
                 return 0;
-        }
 
-        leave("receive_active - active");
         return 1;
 }
 
@@ -754,8 +683,6 @@ static void activate_receiver(struct xircom_private *card)
 {
         unsigned int val;
         int counter;
-        enter("activate_receiver");
-
 
         val = inl(card->io_port + CSR6);        /* Operation mode */
 
@@ -776,7 +703,7 @@ static void activate_receiver(struct xircom_private *card)
                 udelay(50);
                 counter--;
                 if (counter <= 0)
-                        pr_err("Receiver failed to deactivate\n");
+                        netdev_err(card->dev, "Receiver failed to deactivate\n");
         }
 
         /* enable the receiver */
@@ -793,10 +720,9 @@ static void activate_receiver(struct xircom_private *card)
                 udelay(50);
                 counter--;
                 if (counter <= 0)
-                        pr_err("Receiver failed to re-activate\n");
+                        netdev_err(card->dev,
+                                   "Receiver failed to re-activate\n");
         }
-
-        leave("activate_receiver");
 }
 
 /*
@@ -810,7 +736,6 @@ static void deactivate_receiver(struct xircom_private *card)
 {
         unsigned int val;
         int counter;
-        enter("deactivate_receiver");
 
         val = inl(card->io_port + CSR6);        /* Operation mode */
         val = val & ~2;                         /* disable the receiver */
@@ -824,11 +749,8 @@ static void deactivate_receiver(struct xircom_private *card)
                 udelay(50);
                 counter--;
                 if (counter <= 0)
-                        pr_err("Receiver failed to deactivate\n");
+                        netdev_err(card->dev, "Receiver failed to deactivate\n");
         }
-
-
-        leave("deactivate_receiver");
 }
 
 
@@ -846,8 +768,6 @@ static void activate_transmitter(struct xircom_private *card)
 {
         unsigned int val;
         int counter;
-        enter("activate_transmitter");
-
 
         val = inl(card->io_port + CSR6);        /* Operation mode */
 
@@ -867,7 +787,8 @@ static void activate_transmitter(struct xircom_private *card)
                 udelay(50);
                 counter--;
                 if (counter <= 0)
-                        pr_err("Transmitter failed to deactivate\n");
+                        netdev_err(card->dev,
+                                   "Transmitter failed to deactivate\n");
         }
 
         /* enable the transmitter */
@@ -884,10 +805,9 @@ static void activate_transmitter(struct xircom_private *card)
                 udelay(50);
                 counter--;
                 if (counter <= 0)
-                        pr_err("Transmitter failed to re-activate\n");
+                        netdev_err(card->dev,
+                                   "Transmitter failed to re-activate\n");
         }
-
-        leave("activate_transmitter");
 }
 
 /*
@@ -901,7 +821,6 @@ static void deactivate_transmitter(struct xircom_private *card)
 {
         unsigned int val;
         int counter;
-        enter("deactivate_transmitter");
 
         val = inl(card->io_port + CSR6);        /* Operation mode */
         val = val & ~2;         /* disable the transmitter */
@@ -915,11 +834,9 @@ static void deactivate_transmitter(struct xircom_private *card)
                 udelay(50);
                 counter--;
                 if (counter <= 0)
-                        pr_err("Transmitter failed to deactivate\n");
+                        netdev_err(card->dev,
+                                   "Transmitter failed to deactivate\n");
         }
-
-
-        leave("deactivate_transmitter");
 }
 
 
@@ -931,13 +848,10 @@ must be called with the lock held and interrupts disabled.
 static void enable_transmit_interrupt(struct xircom_private *card)
 {
         unsigned int val;
-        enter("enable_transmit_interrupt");
 
         val = inl(card->io_port + CSR7);        /* Interrupt enable register */
         val |= 1;                               /* enable the transmit interrupt */
         outl(val, card->io_port + CSR7);
-
-        leave("enable_transmit_interrupt");
 }
 
 
@@ -949,13 +863,10 @@ must be called with the lock held and interrupts disabled.
 static void enable_receive_interrupt(struct xircom_private *card)
 {
         unsigned int val;
-        enter("enable_receive_interrupt");
 
         val = inl(card->io_port + CSR7);        /* Interrupt enable register */
         val = val | (1 << 6);                   /* enable the receive interrupt */
         outl(val, card->io_port + CSR7);
-
-        leave("enable_receive_interrupt");
 }
 
 /*
@@ -966,13 +877,10 @@ must be called with the lock held and interrupts disabled.
 static void enable_link_interrupt(struct xircom_private *card)
 {
         unsigned int val;
-        enter("enable_link_interrupt");
 
         val = inl(card->io_port + CSR7);        /* Interrupt enable register */
         val = val | (1 << 27);                  /* enable the link status chage interrupt */
         outl(val, card->io_port + CSR7);
-
-        leave("enable_link_interrupt");
 }
 
 
@@ -985,12 +893,9 @@ must be called with the lock held and interrupts disabled.
 static void disable_all_interrupts(struct xircom_private *card)
 {
         unsigned int val;
-        enter("enable_all_interrupts");
 
         val = 0;                                /* disable all interrupts */
         outl(val, card->io_port + CSR7);
-
-        leave("disable_all_interrupts");
 }
 
 /*
@@ -1001,7 +906,6 @@ must be called with the lock held and interrupts disabled.
 static void enable_common_interrupts(struct xircom_private *card)
 {
         unsigned int val;
-        enter("enable_link_interrupt");
 
         val = inl(card->io_port + CSR7);        /* Interrupt enable register */
         val |= (1<<16); /* Normal Interrupt Summary */
@@ -1013,8 +917,6 @@ static void enable_common_interrupts(struct xircom_private *card)
         val |= (1<<2);  /* Transmit Buffer Unavailable */
         val |= (1<<1);  /* Transmit Process Stopped */
         outl(val, card->io_port + CSR7);
-
-        leave("enable_link_interrupt");
 }
 
 /*
@@ -1025,13 +927,11 @@ must be called with the lock held and interrupts disabled.
 static int enable_promisc(struct xircom_private *card)
 {
         unsigned int val;
-        enter("enable_promisc");
 
         val = inl(card->io_port + CSR6);
         val = val | (1 << 6);
         outl(val, card->io_port + CSR6);
 
-        leave("enable_promisc");
         return 1;
 }
 
@@ -1046,7 +946,6 @@ Must be called in locked state with interrupts disabled
 static int link_status(struct xircom_private *card)
 {
         unsigned int val;
-        enter("link_status");
 
         val = inb(card->io_port + CSR12);
 
@@ -1057,7 +956,6 @@ static int link_status(struct xircom_private *card)
 
         /* If we get here -> no link at all */
 
-        leave("link_status");
         return 0;
 }
 
@@ -1076,8 +974,6 @@ static void read_mac_address(struct xircom_private *card)
         unsigned long flags;
         int i;
 
-        enter("read_mac_address");
-
         spin_lock_irqsave(&card->lock, flags);
 
         outl(1 << 12, card->io_port + CSR9);    /* enable boot rom access */
@@ -1105,7 +1001,6 @@ static void read_mac_address(struct xircom_private *card)
         }
         spin_unlock_irqrestore(&card->lock, flags);
         pr_debug(" %pM\n", card->dev->dev_addr);
-        leave("read_mac_address");
 }
 
 
@@ -1118,8 +1013,6 @@ static void transceiver_voodoo(struct xircom_private *card)
 {
         unsigned long flags;
 
-        enter("transceiver_voodoo");
-
         /* disable all powermanagement */
         pci_write_config_dword(card->pdev, PCI_POWERMGMT, 0x0000);
 
@@ -1137,7 +1030,6 @@ static void transceiver_voodoo(struct xircom_private *card)
         spin_unlock_irqrestore(&card->lock, flags);
 
         netif_start_queue(card->dev);
-        leave("transceiver_voodoo");
 }
 
 
@@ -1146,8 +1038,6 @@ static void xircom_up(struct xircom_private *card)
         unsigned long flags;
         int i;
 
-        enter("xircom_up");
-
         /* disable all powermanagement */
         pci_write_config_dword(card->pdev, PCI_POWERMGMT, 0x0000);
 
@@ -1171,87 +1061,84 @@ static void xircom_up(struct xircom_private *card)
         trigger_receive(card);
         trigger_transmit(card);
         netif_start_queue(card->dev);
-        leave("xircom_up");
 }
 
 /* Bufferoffset is in BYTES */
-static void investigate_read_descriptor(struct net_device *dev,struct xircom_private *card, int descnr, unsigned int bufferoffset)
+static void
+investigate_read_descriptor(struct net_device *dev, struct xircom_private *card,
+                            int descnr, unsigned int bufferoffset)
 {
-                int status;
+        int status;
 
-                enter("investigate_read_descriptor");
-                status = le32_to_cpu(card->rx_buffer[4*descnr]);
+        status = le32_to_cpu(card->rx_buffer[4*descnr]);
 
-                if ((status > 0)) {     /* packet received */
+        if (status > 0) {               /* packet received */
 
-                        /* TODO: discard error packets */
+                /* TODO: discard error packets */
 
-                        short pkt_len = ((status >> 16) & 0x7ff) - 4;   /* minus 4, we don't want the CRC */
-                        struct sk_buff *skb;
+                short pkt_len = ((status >> 16) & 0x7ff) - 4;
+                                        /* minus 4, we don't want the CRC */
+                struct sk_buff *skb;
 
-                        if (pkt_len > 1518) {
-                                pr_err("Packet length %i is bogus\n", pkt_len);
-                                pkt_len = 1518;
-                        }
-
-                        skb = dev_alloc_skb(pkt_len + 2);
-                        if (skb == NULL) {
-                                dev->stats.rx_dropped++;
-                                goto out;
-                        }
-                        skb_reserve(skb, 2);
-                        skb_copy_to_linear_data(skb, (unsigned char*)&card->rx_buffer[bufferoffset / 4], pkt_len);
-                        skb_put(skb, pkt_len);
-                        skb->protocol = eth_type_trans(skb, dev);
-                        netif_rx(skb);
-                        dev->stats.rx_packets++;
-                        dev->stats.rx_bytes += pkt_len;
-
-                      out:
-                        /* give the buffer back to the card */
-                        card->rx_buffer[4*descnr] =  cpu_to_le32(0x80000000);
-                        trigger_receive(card);
+                if (pkt_len > 1518) {
+                        netdev_err(dev, "Packet length %i is bogus\n", pkt_len);
+                        pkt_len = 1518;
                 }
 
-                leave("investigate_read_descriptor");
-
+                skb = dev_alloc_skb(pkt_len + 2);
+                if (skb == NULL) {
+                        dev->stats.rx_dropped++;
+                        goto out;
+                }
+                skb_reserve(skb, 2);
+                skb_copy_to_linear_data(skb,
+                                        &card->rx_buffer[bufferoffset / 4],
+                                        pkt_len);
+                skb_put(skb, pkt_len);
+                skb->protocol = eth_type_trans(skb, dev);
+                netif_rx(skb);
+                dev->stats.rx_packets++;
+                dev->stats.rx_bytes += pkt_len;
+
+out:
+                /* give the buffer back to the card */
+                card->rx_buffer[4*descnr] = cpu_to_le32(0x80000000);
+                trigger_receive(card);
+        }
 }
 
 
 /* Bufferoffset is in BYTES */
-static void investigate_write_descriptor(struct net_device *dev, struct xircom_private *card, int descnr, unsigned int bufferoffset)
+static void
+investigate_write_descriptor(struct net_device *dev,
+                             struct xircom_private *card,
+                             int descnr, unsigned int bufferoffset)
 {
-                int status;
-
-                enter("investigate_write_descriptor");
+        int status;
 
-                status = le32_to_cpu(card->tx_buffer[4*descnr]);
+        status = le32_to_cpu(card->tx_buffer[4*descnr]);
 #if 0
-                if (status & 0x8000) {  /* Major error */
-                        pr_err("Major transmit error status %x\n", status);
-                        card->tx_buffer[4*descnr] = 0;
-                        netif_wake_queue (dev);
-                }
+        if (status & 0x8000) {  /* Major error */
+                pr_err("Major transmit error status %x\n", status);
+                card->tx_buffer[4*descnr] = 0;
+                netif_wake_queue (dev);
+        }
 #endif
-                if (status > 0) {       /* bit 31 is 0 when done */
-                        if (card->tx_skb[descnr]!=NULL) {
-                                dev->stats.tx_bytes += card->tx_skb[descnr]->len;
-                                dev_kfree_skb_irq(card->tx_skb[descnr]);
-                        }
-                        card->tx_skb[descnr] = NULL;
-                        /* Bit 8 in the status field is 1 if there was a collision */
-                        if (status&(1<<8))
-                                dev->stats.collisions++;
-                        card->tx_buffer[4*descnr] = 0; /* descriptor is free again */
-                        netif_wake_queue (dev);
-                        dev->stats.tx_packets++;
+        if (status > 0) {       /* bit 31 is 0 when done */
+                if (card->tx_skb[descnr]!=NULL) {
+                        dev->stats.tx_bytes += card->tx_skb[descnr]->len;
+                        dev_kfree_skb_irq(card->tx_skb[descnr]);
                 }
-
-                leave("investigate_write_descriptor");
-
+                card->tx_skb[descnr] = NULL;
+                /* Bit 8 in the status field is 1 if there was a collision */
+                if (status & (1 << 8))
+                        dev->stats.collisions++;
+                card->tx_buffer[4*descnr] = 0; /* descriptor is free again */
+                netif_wake_queue (dev);
+                dev->stats.tx_packets++;
+        }
 }
 
-
 static int __init xircom_init(void)
 {
         return pci_register_driver(&xircom_ops);