From 5e1ef9846929a574a7e4712abdda45b3adca4c1a Mon Sep 17 00:00:00 2001
From: Michael Brown <mcb30@etherboot.org>
Date: Tue, 23 Jun 2009 18:36:01 +0100
Subject: [PATCH] [e1000] Ensure descriptor is fully written before sending
 packet

Reported-by: Mark McLoughlin <markmc@redhat.com>
---
 src/drivers/net/e1000/e1000.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/drivers/net/e1000/e1000.c b/src/drivers/net/e1000/e1000.c
index b6af86fc..faca1e07 100644
--- a/src/drivers/net/e1000/e1000.c
+++ b/src/drivers/net/e1000/e1000.c
@@ -588,6 +588,7 @@ e1000_transmit ( struct net_device *netdev, struct io_buffer *iobuf )
 
 	/* Write new tail to NIC, making packet available for transmit
 	 */
+	wmb();
 	E1000_WRITE_REG ( hw, TDT, adapter->tx_tail );
 
 	return 0;