[patch] netpoll: revert netif_queue_stopped changeset

[Jeff Moyer <jmoyer@redhat.com>]

Hi, Matt,

Here's the first of the broken out patch set.  This puts the check for
netif_queue_stopped back into netpoll_send_skb.  Network drivers are not
designed to have their hard_start_xmit routines called when the queue is
stopped.

Signed-off-by: Jeff Moyer <jmoyer@redhat.com>

--- linux-2.6.7/net/core/netpoll.c.orig	2004-08-16 11:57:46.890322256 -0400
+++ linux-2.6.7/net/core/netpoll.c	2004-08-16 12:17:34.477781520 -0400
@@ -168,6 +168,18 @@ repeat:
 	spin_lock(&np->dev->xmit_lock);
 	np->dev->xmit_lock_owner = smp_processor_id();
 
+	/*
+	 * network drivers do not expect to be called if the queue is
+	 * stopped.
+	 */
+	if (netif_queue_stopped(np->dev)) {
+		np->dev->xmit_lock_owner = -1;
+		spin_unlock(&np->dev->xmit_lock);
+
+		netpoll_poll(np);
+		goto repeat;
+	}
+
 	status = np->dev->hard_start_xmit(skb, np->dev);
 	np->dev->xmit_lock_owner = -1;
 	spin_unlock(&np->dev->xmit_lock);