net: declare new net_device priv_flag IFF_NO_QUEUE

This private net_device flag can be set by drivers to inform that a
device runs fine without a qdisc attached. This was formerly done by
setting tx_queue_len to zero.

Signed-off-by: Phil Sutter <phil@nwl.cc>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit fa8187c96471c49419c25d4ec3299d17d3f274b2)

Orabug: 24614549

Signed-off-by: Ethan Zhao <ethan.zhao@oracle.com>
Conflicts:
	include/linux/netdevice.h

Signed-off-by: Dhaval Giani <dhaval.giani@oracle.com>

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index c5f7d5ff17c798ac194eff9c22160be3ed55fb8a..67a789efde5e2ef85b326f525c570296fdd6525f 100644 (file)
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1243,6 +1243,7 @@ struct net_device_ops {
  * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
  *     change when it's running
  * @IFF_MACVLAN: Macvlan device
+ * @IFF_NO_QUEUE: device can run without qdisc attached
  */
 enum netdev_priv_flags {
        IFF_802_1Q_VLAN                 = 1<<0,
@@ -1270,6 +1271,7 @@ enum netdev_priv_flags {
        IFF_XMIT_DST_RELEASE_PERM       = 1<<22,
        IFF_IPVLAN_MASTER               = 1<<23,
        IFF_IPVLAN_SLAVE                = 1<<24,
+       IFF_NO_QUEUE                    = 1<<26,
 };
 
 #define IFF_802_1Q_VLAN                        IFF_802_1Q_VLAN
@@ -1297,6 +1299,7 @@ enum netdev_priv_flags {
 #define IFF_XMIT_DST_RELEASE_PERM      IFF_XMIT_DST_RELEASE_PERM
 #define IFF_IPVLAN_MASTER              IFF_IPVLAN_MASTER
 #define IFF_IPVLAN_SLAVE               IFF_IPVLAN_SLAVE
+#define IFF_NO_QUEUE                   IFF_NO_QUEUE
 
 /**
  *     struct net_device - The DEVICE structure.