[PATCH] sky2: dual port tx completion

Sometimes on dual port cards, one tx complete may cover both
ports. To handle that rearrange poll routine to lookup at
end.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

1 files changed, 16 insertions, 10 deletions

diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index 1d5c3039f53a..52c7b1886314 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -1242,6 +1242,9 @@ static void sky2_tx_complete(struct sky2_port *sky2, u16 done)
         struct net_device *dev = sky2->netdev;
         unsigned i;
 
+        if (done == sky2->tx_cons)
+                return;
+
         if (unlikely(netif_msg_tx_done(sky2)))
                 printk(KERN_DEBUG "%s: tx done, up to %u\n",
                        dev->name, done);
@@ -1711,16 +1714,18 @@ error:
         goto resubmit;
 }
 
-/* Transmit ring index in reported status block is encoded as:
- *
- *   | TXS2 | TXA2 | TXS1 | TXA1
+/*
+ * Check for transmit complete
  */
-static inline u16 tx_index(u8 port, u32 status, u16 len)
+static inline void sky2_tx_check(struct sky2_hw *hw, int port)
 {
-        if (port == 0)
-                return status & 0xfff;
-        else
-                return ((status >> 24) & 0xff) | (len & 0xf) << 8;
+        struct net_device *dev = hw->dev[port];
+
+        if (dev && netif_running(dev)) {
+                sky2_tx_complete(netdev_priv(dev),
+                                 sky2_read16(hw, port == 0
+                                             ? STAT_TXA1_RIDX : STAT_TXA2_RIDX));
+        }
 }
 
 /*
@@ -1803,8 +1808,7 @@ static int sky2_poll(struct net_device *dev0, int *budget)
                         break;
 
                 case OP_TXINDEXLE:
-                        sky2_tx_complete(sky2,
-                                         tx_index(sky2->port, status, length));
+                        /* pick up transmit status later */
                         break;
 
                 default:
@@ -1816,6 +1820,8 @@ static int sky2_poll(struct net_device *dev0, int *budget)
         }
 
 exit_loop:
+        sky2_tx_check(hw, 0);
+        sky2_tx_check(hw, 1);
 
         mmiowb();