net: add netif_tx_queue_frozen_or_stopped

When testing struct netdev_queue state against FROZEN bit, we also test
XOFF bit. We can test both bits at once and save some cycles.

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

1 files changed, 4 insertions, 2 deletions

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index badf9285fe0d..7c6ae2f4b9ab 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -493,6 +493,8 @@ static inline void napi_synchronize(const struct napi_struct *n)
 enum netdev_queue_state_t {
         __QUEUE_STATE_XOFF,
         __QUEUE_STATE_FROZEN,
+#define QUEUE_STATE_XOFF_OR_FROZEN ((1 << __QUEUE_STATE_XOFF)           | \
+                                    (1 << __QUEUE_STATE_FROZEN))
 };
 
 struct netdev_queue {
@@ -1629,9 +1631,9 @@ static inline int netif_queue_stopped(const struct net_device *dev)
         return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
 }
 
-static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
+static inline int netif_tx_queue_frozen_or_stopped(const struct netdev_queue *dev_queue)
 {
-        return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
+        return dev_queue->state & QUEUE_STATE_XOFF_OR_FROZEN;
 }
 
 /**