ixgb: recalculate after how many descriptors to wake the queue

Recalculate when to wake the queue using DESC_NEEDED instead of a
static hardcoded number.

Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>

2 files changed, 1 insertions, 4 deletions

diff --git a/drivers/net/ixgb/ixgb.h b/drivers/net/ixgb/ixgb.h
index 82b67af54c94..a4bee8cafa58 100644
--- a/drivers/net/ixgb/ixgb.h
+++ b/drivers/net/ixgb/ixgb.h
@@ -110,9 +110,6 @@ struct ixgb_adapter;
 #define IXGB_RXBUFFER_8192  8192
 #define IXGB_RXBUFFER_16384 16384
 
-/* How many Tx Descriptors do we need to call netif_wake_queue? */
-#define IXGB_TX_QUEUE_WAKE 16
-
 /* How many Rx Buffers do we bundle into one write to the hardware ? */
 #define IXGB_RX_BUFFER_WRITE    4       /* Must be power of 2 */
 
diff --git a/drivers/net/ixgb/ixgb_main.c b/drivers/net/ixgb/ixgb_main.c
index fee4c5aac31b..960b44b5b02b 100644
--- a/drivers/net/ixgb/ixgb_main.c
+++ b/drivers/net/ixgb/ixgb_main.c
@@ -1787,7 +1787,7 @@ ixgb_clean_tx_irq(struct ixgb_adapter *adapter)
         if (unlikely(netif_queue_stopped(netdev))) {
                 spin_lock(&adapter->tx_lock);
                 if (netif_queue_stopped(netdev) && netif_carrier_ok(netdev) &&
-                    (IXGB_DESC_UNUSED(tx_ring) > IXGB_TX_QUEUE_WAKE))
+                    (IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED))
                         netif_wake_queue(netdev);
                 spin_unlock(&adapter->tx_lock);
         }