Merge tag 'for-linus-20140225' of git://git.infradead.org/linux-mtd

[platform/adaptation/renesas_rcar/renesas_kernel.git] / include / linux / netdevice.h

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 1de9c13..e8eeebd 100644 (file)
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -2279,6 +2279,26 @@ static inline void netdev_reset_queue(struct net_device *dev_queue)
 }
 
 /**
+ *     netdev_cap_txqueue - check if selected tx queue exceeds device queues
+ *     @dev: network device
+ *     @queue_index: given tx queue index
+ *
+ *     Returns 0 if given tx queue index >= number of device tx queues,
+ *     otherwise returns the originally passed tx queue index.
+ */
+static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index)
+{
+       if (unlikely(queue_index >= dev->real_num_tx_queues)) {
+               net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
+                                    dev->name, queue_index,
+                                    dev->real_num_tx_queues);
+               return 0;
+       }
+
+       return queue_index;
+}
+
+/**
  *     netif_running - test if up
  *     @dev: network device
  *