synclink_gt: improve TIOCOUTQ accuracy

[linux-2.6-omap-h63xx.git] / drivers / char / synclinkmp.c

diff --git a/drivers/char/synclinkmp.c b/drivers/char/synclinkmp.c
index c4bc09018368cc79c26507a70e00647044b740b3..c0490cbd0db2e99bf0e149ef99b03d2506711c6c 100644 (file)
--- a/drivers/char/synclinkmp.c
+++ b/drivers/char/synclinkmp.c
@@ -527,7 +527,7 @@ static int  read_proc(char *page, char **start, off_t off, int count,int *eof, v
 static int  chars_in_buffer(struct tty_struct *tty);
 static void throttle(struct tty_struct * tty);
 static void unthrottle(struct tty_struct * tty);
-static void set_break(struct tty_struct *tty, int break_state);
+static int set_break(struct tty_struct *tty, int break_state);
 
 #if SYNCLINK_GENERIC_HDLC
 #define dev_to_port(D) (dev_to_hdlc(D)->priv)
@@ -552,7 +552,7 @@ static int  wait_mgsl_event(SLMP_INFO *info, int __user *mask_ptr);
 static int  tiocmget(struct tty_struct *tty, struct file *file);
 static int  tiocmset(struct tty_struct *tty, struct file *file,
                     unsigned int set, unsigned int clear);
-static void set_break(struct tty_struct *tty, int break_state);
+static int  set_break(struct tty_struct *tty, int break_state);
 
 static void add_device(SLMP_INFO *info);
 static void device_init(int adapter_num, struct pci_dev *pdev);
@@ -1587,7 +1587,7 @@ static void unthrottle(struct tty_struct * tty)
 /* set or clear transmit break condition
  * break_state -1=set break condition, 0=clear
  */
-static void set_break(struct tty_struct *tty, int break_state)
+static int set_break(struct tty_struct *tty, int break_state)
 {
        unsigned char RegValue;
        SLMP_INFO * info = (SLMP_INFO *)tty->driver_data;
@@ -1598,7 +1598,7 @@ static void set_break(struct tty_struct *tty, int break_state)
                         __FILE__,__LINE__, info->device_name, break_state);
 
        if (sanity_check(info, tty->name, "set_break"))
-               return;
+               return -EINVAL;
 
        spin_lock_irqsave(&info->lock,flags);
        RegValue = read_reg(info, CTL);
@@ -1608,6 +1608,7 @@ static void set_break(struct tty_struct *tty, int break_state)
                RegValue &= ~BIT3;
        write_reg(info, CTL, RegValue);
        spin_unlock_irqrestore(&info->lock,flags);
+       return 0;
 }
 
 #if SYNCLINK_GENERIC_HDLC
@@ -1672,7 +1673,6 @@ static int hdlcdev_attach(struct net_device *dev, unsigned short encoding,
 static int hdlcdev_xmit(struct sk_buff *skb, struct net_device *dev)
 {
        SLMP_INFO *info = dev_to_port(dev);
-       struct net_device_stats *stats = hdlc_stats(dev);
        unsigned long flags;
 
        if (debug_level >= DEBUG_LEVEL_INFO)
@@ -1686,8 +1686,8 @@ static int hdlcdev_xmit(struct sk_buff *skb, struct net_device *dev)
        tx_load_dma_buffer(info, skb->data, skb->len);
 
        /* update network statistics */
-       stats->tx_packets++;
-       stats->tx_bytes += skb->len;
+       dev->stats.tx_packets++;
+       dev->stats.tx_bytes += skb->len;
 
        /* done with socket buffer, so free it */
        dev_kfree_skb(skb);
@@ -1903,14 +1903,13 @@ static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 static void hdlcdev_tx_timeout(struct net_device *dev)
 {
        SLMP_INFO *info = dev_to_port(dev);
-       struct net_device_stats *stats = hdlc_stats(dev);
        unsigned long flags;
 
        if (debug_level >= DEBUG_LEVEL_INFO)
                printk("hdlcdev_tx_timeout(%s)\n",dev->name);
 
-       stats->tx_errors++;
-       stats->tx_aborted_errors++;
+       dev->stats.tx_errors++;
+       dev->stats.tx_aborted_errors++;
 
        spin_lock_irqsave(&info->lock,flags);
        tx_stop(info);
@@ -1943,27 +1942,27 @@ static void hdlcdev_rx(SLMP_INFO *info, char *buf, int size)
 {
        struct sk_buff *skb = dev_alloc_skb(size);
        struct net_device *dev = info->netdev;
-       struct net_device_stats *stats = hdlc_stats(dev);
 
        if (debug_level >= DEBUG_LEVEL_INFO)
                printk("hdlcdev_rx(%s)\n",dev->name);
 
        if (skb == NULL) {
-               printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n", dev->name);
-               stats->rx_dropped++;
+               printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n",
+                      dev->name);
+               dev->stats.rx_dropped++;
                return;
        }
 
-       memcpy(skb_put(skb, size),buf,size);
+       memcpy(skb_put(skb, size), buf, size);
 
-       skb->protocol = hdlc_type_trans(skb, info->netdev);
+       skb->protocol = hdlc_type_trans(skb, dev);
 
-       stats->rx_packets++;
-       stats->rx_bytes += size;
+       dev->stats.rx_packets++;
+       dev->stats.rx_bytes += size;
 
        netif_rx(skb);
 
-       info->netdev->last_rx = jiffies;
+       dev->last_rx = jiffies;
 }
 
 /**
@@ -4976,9 +4975,8 @@ CheckAgain:
                framesize = 0;
 #if SYNCLINK_GENERIC_HDLC
                {
-                       struct net_device_stats *stats = hdlc_stats(info->netdev);
-                       stats->rx_errors++;
-                       stats->rx_frame_errors++;
+                       info->netdev->stats.rx_errors++;
+                       info->netdev->stats.rx_frame_errors++;
                }
 #endif
        }