net: fail alloc_netdev_mq if queue count < 1

In alloc_netdev_mq fail if requested queue_count < 1.

Signed-off-by: Tom Herbert <therbert@google.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 0 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index 04972a4783e2..f44d29ae5d67 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5511,6 +5511,12 @@ struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
 
         BUG_ON(strlen(name) >= sizeof(dev->name));
 
+        if (queue_count < 1) {
+                pr_err("alloc_netdev: Unable to allocate device "
+                       "with zero queues.\n");
+                return NULL;
+        }
+
         alloc_size = sizeof(struct net_device);
         if (sizeof_priv) {
                 /* ensure 32-byte alignment of private area */