netdev - [PATCH 10/18] spidernet: service TX later.

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Message-ID: <20070607194130.GJ16077@austin.ibm.com>
Date:	Thu, 7 Jun 2007 14:41:30 -0500
From:	linas@...tin.ibm.com (Linas Vepstas)
To:	Jeff Garzik <jgarzik@...ox.com>
Cc:	cbe-oss-dev@...abs.org, netdev@...r.kernel.org
Subject: [PATCH 10/18] spidernet: service TX later.


When entering the netdev poll routine, empty out the RX
chain first, before cleaning up the TX chain. This should
help avoid RX buffer overflows.

Signed-off-by: Linas Vepstas <linas@...tin.ibm.com>

----
 drivers/net/spider_net.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Index: linux-2.6.22-rc1/drivers/net/spider_net.c
===================================================================
--- linux-2.6.22-rc1.orig/drivers/net/spider_net.c	2007-06-07 11:52:17.000000000 -0500
+++ linux-2.6.22-rc1/drivers/net/spider_net.c	2007-06-07 11:52:20.000000000 -0500
@@ -1224,7 +1224,6 @@ spider_net_poll(struct net_device *netde
 	int packets_to_do, packets_done = 0;
 	int no_more_packets = 0;
 
-	spider_net_cleanup_tx_ring(card);
 	packets_to_do = min(*budget, netdev->quota);
 
 	while (packets_to_do) {
@@ -1243,6 +1242,8 @@ spider_net_poll(struct net_device *netde
 	spider_net_refill_rx_chain(card);
 	spider_net_enable_rxdmac(card);
 
+	spider_net_cleanup_tx_ring(card);
+
 	/* if all packets are in the stack, enable interrupts and return 0 */
 	/* if not, return 1 */
 	if (no_more_packets) {
-
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