net: honour netif_set_real_num_tx_queues() retval

In netif_copy_real_num_queues() the return value of
netif_set_real_num_tx_queues() should be checked.

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 1 deletions

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index ab0251d541ab..eb06e58bed0b 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -2110,7 +2110,12 @@ static inline int netif_set_real_num_rx_queues(struct net_device *dev,
 static inline int netif_copy_real_num_queues(struct net_device *to_dev,
                                              const struct net_device *from_dev)
 {
-        netif_set_real_num_tx_queues(to_dev, from_dev->real_num_tx_queues);
+        int err;
+
+        err = netif_set_real_num_tx_queues(to_dev,
+                                           from_dev->real_num_tx_queues);
+        if (err)
+                return err;
 #ifdef CONFIG_RPS
         return netif_set_real_num_rx_queues(to_dev,
                                             from_dev->real_num_rx_queues);