netdev - [PATCH 1/2] pktgen: check for link down

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Date:	Sat, 19 Sep 2009 22:18:44 -0700
From:	Stephen Hemminger <shemminger@...tta.com>
To:	David Miller <davem@...emloft.net>,
	Robert Olsson <robert@...julf.net>,
	Jesper Dangaard Brouer <jdb@...x.dk>
Cc:	netdev@...r.kernel.org
Subject: [PATCH 1/2] pktgen: check for link down

If cable is pulled, pktgen shouldn't continue slamming packets into the
device.

Signed-off-by: Stephen Hemminger <shemminger@...tta.com>

--- a/net/core/pktgen.c	2009-09-19 11:20:55.546463176 -0700
+++ b/net/core/pktgen.c	2009-09-19 11:22:44.810509240 -0700
@@ -1959,7 +1959,7 @@ static int pktgen_setup_dev(struct pktge
 	if (odev->type != ARPHRD_ETHER) {
 		printk(KERN_ERR "pktgen: not an ethernet device: \"%s\"\n", ifname);
 		err = -EINVAL;
-	} else if (!netif_running(odev)) {
+	} else if (!netif_running(odev) || !netif_carrier_ok(odev)) {
 		printk(KERN_ERR "pktgen: device is down: \"%s\"\n", ifname);
 		err = -ENETDOWN;
 	} else {
@@ -3410,7 +3410,7 @@ static void pktgen_xmit(struct pktgen_de
 	/* Did we saturate the queue already? */
 	if (netif_tx_queue_stopped(txq) || netif_tx_queue_frozen(txq)) {
 		/* If device is down, then all queues are permnantly frozen */
-		if (netif_running(odev))
+		if (netif_running(odev) && netif_carrier_ok(odev))
 			idle(pkt_dev);
 		else
 			pktgen_stop_device(pkt_dev);
--
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