myri10ge: fix stop/go mmio ordering

Use mmiowb() to ensure "stop" and "go" commands are sent in order on ia64.
Signed-off-by: Brice Goglin <brice@myri.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

drivers/net/myri10ge/myri10ge.c

@@ -75,7 +75,7 @@
 #include "myri10ge_mcp.h"
 #include "myri10ge_mcp_gen_header.h"
 
-#define MYRI10GE_VERSION_STR "1.4.3-1.371"
+#define MYRI10GE_VERSION_STR "1.4.3-1.375"
 
 MODULE_DESCRIPTION("Myricom 10G driver (10GbE)");
 MODULE_AUTHOR("Maintainer: help@myri.com");
@@ -1393,6 +1393,7 @@ myri10ge_tx_done(struct myri10ge_slice_state *ss, int mcp_index)
 		if (tx->req == tx->done) {
 			tx->queue_active = 0;
 			put_be32(htonl(1), tx->send_stop);
+			mmiowb();
 		}
 		__netif_tx_unlock(dev_queue);
 	}
@@ -2864,6 +2865,7 @@ static int myri10ge_xmit(struct sk_buff *skb, struct net_device *dev)
 	if ((mgp->dev->real_num_tx_queues > 1) && tx->queue_active == 0) {
 		tx->queue_active = 1;
 		put_be32(htonl(1), tx->send_go);
+		mmiowb();
 	}
 	tx->pkt_start++;
 	if ((avail - count) < MXGEFW_MAX_SEND_DESC) {