[PKTGEN]: Fix multiqueue oops.

Initially pkt_dev can be NULL this causes netif_subqueue_stopped to 
oops. The patch below should cure it. But maybe the pktgen TX logic 
should be reworked to better support the new multiqueue support. 

Signed-off-by: Robert Olsson <robert.olsson@its.uu.se>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 2 deletions

diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index 7bae576ac115..4ad62d375373 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -3331,8 +3331,9 @@ static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev)
         }
 
         if ((netif_queue_stopped(odev) ||
-             netif_subqueue_stopped(odev, pkt_dev->skb->queue_mapping)) ||
-             need_resched()) {
+             (pkt_dev->skb &&
+              netif_subqueue_stopped(odev, pkt_dev->skb->queue_mapping))) ||
+            need_resched()) {
                 idle_start = getCurUs();
 
                 if (!netif_running(odev)) {