[resend][PATCH net-drivers-2.6 3/11] ixgb: Change RDT write bump size to 4

[Malli Chilakala <mallikarjuna.chilakala@xxxxxxxxx>]

Change RDT write bump size back to 4

Signed-off-by: Mallikarjuna R Chilakala <mallikarjuna.chilakala@xxxxxxxxx>
Signed-off-by: Ganesh Venkatesan <ganesh.venkatesan@xxxxxxxxx>
Signed-off-by: John Ronciak <john.ronciak@xxxxxxxxx>

diff -up net-drivers-2.6/drivers/net/ixgb/ixgb.h 
net-drivers-2.6/drivers/net/ixgb.new/ixgb.h
--- net-drivers-2.6/drivers/net/ixgb/ixgb.h     2005-04-05 23:06:36.331229608 
-0700
+++ net-drivers-2.6/drivers/net/ixgb.new/ixgb.h 2005-04-05 23:06:38.056967256 
-0700
@@ -110,7 +110,7 @@ struct ixgb_adapter;
 #define IXGB_TX_QUEUE_WAKE 16
 
 /* How many Rx Buffers do we bundle into one write to the hardware ? */
-#define IXGB_RX_BUFFER_WRITE   16      /* Must be power of 2 */
+#define IXGB_RX_BUFFER_WRITE   4       /* Must be power of 2 */
 
 /* only works for sizes that are powers of 2 */
 #define IXGB_ROUNDUP(i, size) ((i) = (((i) + (size) - 1) & ~((size) - 1)))