Merge branch 'netdev_features-start-cleaning-netdev_features_t-up'

Alexander Lobakin says:

====================
netdev_features: start cleaning netdev_features_t up

NETDEV_FEATURE_COUNT is currently 64, which means we can't add any new
features as netdev_features_t is u64.
As per several discussions, instead of converting netdev_features_t to
a bitmap, which would mean A LOT of changes, we can try cleaning up
netdev feature bits.
There's a bunch of bits which don't really mean features, rather device
attributes/properties that can't be changed via Ethtool in any of the
drivers. Such attributes can be moved to netdev private flags without
losing any functionality.

Start converting some read-only netdev features to private flags from
the ones that are most obvious, like lockless Tx, inability to change
network namespace etc. I was able to reduce NETDEV_FEATURE_COUNT from
64 to 60, which mean 4 free slots for new features. There are obviously
more read-only features to convert, such as highDMA, "challenged VLAN",
HSR (4 bits) - this will be done in subsequent series.

Please note that currently netdev features are not uAPI/ABI by any means.
Ethtool passes their names and bits to the userspace separately and there
are no hardcoded names/bits in the userspace, so that new Ethtool could
work on older kernels and vice versa.
This, however, isn't true for Ethtools < 3.4. I haven't changed the bit
positions of the already existing features and instead replaced the freed
bits with stubs. But it's anyway theoretically possible that Ethtools
older than 2011 will break. I hope no currently supported distros supply
such an ancient version.
Shell scripts also most likely won't break since the removed bits were
always read-only, meaning nobody would try touching them from a script.
====================

Link: https://patch.msgid.link/20240829123340.789395-1-aleksander.lobakin@intel.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Documentation/networking/net_cachelines/net_device.rst

@@ -7,6 +7,8 @@ net_device struct fast path usage breakdown
 
 Type                                Name                    fastpath_tx_access  fastpath_rx_access  Comments
 ..struct                            ..net_device                                                    
+unsigned_long:32                    priv_flags              read_mostly         -                   __dev_queue_xmit(tx)
+unsigned_long:1                     lltx                    read_mostly         -                   HARD_TX_LOCK,HARD_TX_TRYLOCK,HARD_TX_UNLOCK(tx)
 char                                name[16]                -                   -                   
 struct_netdev_name_node*            name_node                                                       
 struct_dev_ifalias*                 ifalias                                                         
@@ -23,7 +25,6 @@ struct_list_head                    ptype_specific
 struct                              adj_list                                                        
 unsigned_int                        flags                   read_mostly         read_mostly         __dev_queue_xmit,__dev_xmit_skb,ip6_output,__ip6_finish_output(tx);ip6_rcv_core(rx)
 xdp_features_t                      xdp_features                                                    
-unsigned_long_long                  priv_flags              read_mostly         -                   __dev_queue_xmit(tx)
 struct_net_device_ops*              netdev_ops              read_mostly         -                   netdev_core_pick_tx,netdev_start_xmit(tx)
 struct_xdp_metadata_ops*            xdp_metadata_ops                                                
 int                                 ifindex                 -                   read_mostly         ip6_rcv_core
@@ -163,6 +164,10 @@ struct_lock_class_key*              qdisc_tx_busylock
 bool                                proto_down                                                      
 unsigned:1                          wol_enabled                                                     
 unsigned:1                          threaded                -                   -                   napi_poll(napi_enable,dev_set_threaded)
+unsigned_long:1                     see_all_hwtstamp_requests                                       
+unsigned_long:1                     change_proto_down                                               
+unsigned_long:1                     netns_local                                                     
+unsigned_long:1                     fcoe_mtu                                                        
 struct_list_head                    net_notifier_list                                               
 struct_macsec_ops*                  macsec_ops                                                      
 struct_udp_tunnel_nic_info*         udp_tunnel_nic_info                                             

Documentation/networking/netdev-features.rst

@@ -139,21 +139,6 @@ chained skbs (skb->next/prev list).
 Features contained in NETIF_F_SOFT_FEATURES are features of networking
 stack. Driver should not change behaviour based on them.
 
- * LLTX driver (deprecated for hardware drivers)
-
-NETIF_F_LLTX is meant to be used by drivers that don't need locking at all,
-e.g. software tunnels.
-
-This is also used in a few legacy drivers that implement their
-own locking, don't use it for new (hardware) drivers.
-
- * netns-local device
-
-NETIF_F_NETNS_LOCAL is set for devices that are not allowed to move between
-network namespaces (e.g. loopback).
-
-Don't use it in drivers.
-
  * VLAN challenged
 
 NETIF_F_VLAN_CHALLENGED should be set for devices which can't cope with VLAN

Documentation/networking/netdevices.rst

@@ -258,11 +258,11 @@ ndo_get_stats:
 ndo_start_xmit:
 	Synchronization: __netif_tx_lock spinlock.
 
-	When the driver sets NETIF_F_LLTX in dev->features this will be
+	When the driver sets dev->lltx this will be
 	called without holding netif_tx_lock. In this case the driver
 	has to lock by itself when needed.
 	The locking there should also properly protect against
-	set_rx_mode. WARNING: use of NETIF_F_LLTX is deprecated.
+	set_rx_mode. WARNING: use of dev->lltx is deprecated.
 	Don't use it for new drivers.
 
 	Context: Process with BHs disabled or BH (timer),

Documentation/networking/switchdev.rst

@@ -137,10 +137,10 @@ would be sub-port 0 on port 1 on switch 1.
 Port Features
 ^^^^^^^^^^^^^
 
-NETIF_F_NETNS_LOCAL
+dev->netns_local
 
 If the switchdev driver (and device) only supports offloading of the default
-network namespace (netns), the driver should set this feature flag to prevent
+network namespace (netns), the driver should set this private flag to prevent
 the port netdev from being moved out of the default netns.  A netns-aware
 driver/device would not set this flag and be responsible for partitioning
 hardware to preserve netns containment.  This means hardware cannot forward

drivers/net/amt.c

@@ -3098,9 +3098,9 @@ static void amt_link_setup(struct net_device *dev)
 	dev->hard_header_len	= 0;
 	dev->addr_len		= 0;
 	dev->priv_flags		|= IFF_NO_QUEUE;
-	dev->features		|= NETIF_F_LLTX;
+	dev->lltx		= true;
+	dev->netns_local	= true;
 	dev->features		|= NETIF_F_GSO_SOFTWARE;
-	dev->features		|= NETIF_F_NETNS_LOCAL;
 	dev->hw_features	|= NETIF_F_SG | NETIF_F_HW_CSUM;
 	dev->hw_features	|= NETIF_F_FRAGLIST | NETIF_F_RXCSUM;
 	dev->hw_features	|= NETIF_F_GSO_SOFTWARE;

drivers/net/bareudp.c

@@ -553,7 +553,6 @@ static void bareudp_setup(struct net_device *dev)
 	SET_NETDEV_DEVTYPE(dev, &bareudp_type);
 	dev->features    |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_FRAGLIST;
 	dev->features    |= NETIF_F_RXCSUM;
-	dev->features    |= NETIF_F_LLTX;
 	dev->features    |= NETIF_F_GSO_SOFTWARE;
 	dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_FRAGLIST;
 	dev->hw_features |= NETIF_F_RXCSUM;
@@ -566,6 +565,7 @@ static void bareudp_setup(struct net_device *dev)
 	dev->type = ARPHRD_NONE;
 	netif_keep_dst(dev);
 	dev->priv_flags |= IFF_NO_QUEUE;
+	dev->lltx = true;
 	dev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
 	dev->pcpu_stat_type = NETDEV_PCPU_STAT_TSTATS;
 }

drivers/net/bonding/bond_main.c

@@ -5928,7 +5928,10 @@ void bond_setup(struct net_device *bond_dev)
 #endif /* CONFIG_XFRM_OFFLOAD */
 
 	/* don't acquire bond device's netif_tx_lock when transmitting */
-	bond_dev->features |= NETIF_F_LLTX;
+	bond_dev->lltx = true;
+
+	/* Don't allow bond devices to change network namespaces. */
+	bond_dev->netns_local = true;
 
 	/* By default, we declare the bond to be fully
 	 * VLAN hardware accelerated capable. Special
@@ -5937,9 +5940,6 @@ void bond_setup(struct net_device *bond_dev)
 	 * capable
 	 */
 
-	/* Don't allow bond devices to change network namespaces. */
-	bond_dev->features |= NETIF_F_NETNS_LOCAL;
-
 	bond_dev->hw_features = BOND_VLAN_FEATURES |
 				NETIF_F_HW_VLAN_CTAG_RX |
 				NETIF_F_HW_VLAN_CTAG_FILTER |

drivers/net/dummy.c

@@ -109,9 +109,10 @@ static void dummy_setup(struct net_device *dev)
 	dev->flags |= IFF_NOARP;
 	dev->flags &= ~IFF_MULTICAST;
 	dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE;
+	dev->lltx = true;
 	dev->features	|= NETIF_F_SG | NETIF_F_FRAGLIST;
 	dev->features	|= NETIF_F_GSO_SOFTWARE;
-	dev->features	|= NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_LLTX;
+	dev->features	|= NETIF_F_HW_CSUM | NETIF_F_HIGHDMA;
 	dev->features	|= NETIF_F_GSO_ENCAP_ALL;
 	dev->hw_features |= dev->features;
 	dev->hw_enc_features |= dev->features;

drivers/net/ethernet/adi/adin1110.c

@@ -1599,7 +1599,7 @@ static int adin1110_probe_netdevs(struct adin1110_priv *priv)
 		netdev->netdev_ops = &adin1110_netdev_ops;
 		netdev->ethtool_ops = &adin1110_ethtool_ops;
 		netdev->priv_flags |= IFF_UNICAST_FLT;
-		netdev->features |= NETIF_F_NETNS_LOCAL;
+		netdev->netns_local = true;
 
 		port_priv->phydev = get_phy_device(priv->mii_bus, i + 1, false);
 		if (IS_ERR(port_priv->phydev)) {

drivers/net/ethernet/chelsio/cxgb/cxgb2.c

@@ -1034,7 +1034,8 @@ static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 		netdev->hw_features |= NETIF_F_SG | NETIF_F_IP_CSUM |
 			NETIF_F_RXCSUM;
 		netdev->features |= NETIF_F_SG | NETIF_F_IP_CSUM |
-			NETIF_F_RXCSUM | NETIF_F_LLTX | NETIF_F_HIGHDMA;
+			NETIF_F_RXCSUM | NETIF_F_HIGHDMA;
+		netdev->lltx = true;
 
 		if (vlan_tso_capable(adapter)) {
 			netdev->features |=

drivers/net/ethernet/chelsio/cxgb4/cxgb4_fcoe.c

@@ -81,8 +81,7 @@ int cxgb_fcoe_enable(struct net_device *netdev)
 
 	netdev->features |= NETIF_F_FCOE_CRC;
 	netdev->vlan_features |= NETIF_F_FCOE_CRC;
-	netdev->features |= NETIF_F_FCOE_MTU;
-	netdev->vlan_features |= NETIF_F_FCOE_MTU;
+	netdev->fcoe_mtu = true;
 
 	netdev_features_change(netdev);
 
@@ -112,8 +111,7 @@ int cxgb_fcoe_disable(struct net_device *netdev)
 
 	netdev->features &= ~NETIF_F_FCOE_CRC;
 	netdev->vlan_features &= ~NETIF_F_FCOE_CRC;
-	netdev->features &= ~NETIF_F_FCOE_MTU;
-	netdev->vlan_features &= ~NETIF_F_FCOE_MTU;
+	netdev->fcoe_mtu = false;
 
 	netdev_features_change(netdev);
 

drivers/net/ethernet/freescale/dpaa/dpaa_eth.c

@@ -229,7 +229,7 @@ static int dpaa_netdev_init(struct net_device *net_dev,
 	net_dev->max_mtu = dpaa_get_max_mtu();
 
 	net_dev->hw_features |= (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
-				 NETIF_F_LLTX | NETIF_F_RXHASH);
+				 NETIF_F_RXHASH);
 
 	net_dev->hw_features |= NETIF_F_SG | NETIF_F_HIGHDMA;
 	/* The kernels enables GSO automatically, if we declare NETIF_F_SG.
@@ -239,6 +239,7 @@ static int dpaa_netdev_init(struct net_device *net_dev,
 	net_dev->features |= NETIF_F_RXCSUM;
 
 	net_dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
+	net_dev->lltx = true;
 	/* we do not want shared skbs on TX */
 	net_dev->priv_flags &= ~IFF_TX_SKB_SHARING;
 

drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c

@@ -4594,12 +4594,13 @@ static int dpaa2_eth_netdev_init(struct net_device *net_dev)
 
 	net_dev->priv_flags |= supported;
 	net_dev->priv_flags &= ~not_supported;
+	net_dev->lltx = true;
 
 	/* Features */
 	net_dev->features = NETIF_F_RXCSUM |
 			    NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
 			    NETIF_F_SG | NETIF_F_HIGHDMA |
-			    NETIF_F_LLTX | NETIF_F_HW_TC | NETIF_F_TSO;
+			    NETIF_F_HW_TC | NETIF_F_TSO;
 	net_dev->gso_max_segs = DPAA2_ETH_ENQUEUE_MAX_FDS;
 	net_dev->hw_features = net_dev->features;
 	net_dev->xdp_features = NETDEV_XDP_ACT_BASIC |

drivers/net/ethernet/intel/ixgbe/ixgbe_dcb_nl.c

@@ -317,7 +317,7 @@ static u8 ixgbe_dcbnl_set_all(struct net_device *netdev)
 		int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
 
 #ifdef IXGBE_FCOE
-		if (adapter->netdev->features & NETIF_F_FCOE_MTU)
+		if (adapter->netdev->fcoe_mtu)
 			max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);
 #endif
 

drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c

@@ -858,7 +858,7 @@ int ixgbe_fcoe_enable(struct net_device *netdev)
 
 	/* enable FCoE and notify stack */
 	adapter->flags |= IXGBE_FLAG_FCOE_ENABLED;
-	netdev->features |= NETIF_F_FCOE_MTU;
+	netdev->fcoe_mtu = true;
 	netdev_features_change(netdev);
 
 	/* release existing queues and reallocate them */
@@ -898,7 +898,7 @@ int ixgbe_fcoe_disable(struct net_device *netdev)
 
 	/* disable FCoE and notify stack */
 	adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
-	netdev->features &= ~NETIF_F_FCOE_MTU;
+	netdev->fcoe_mtu = false;
 
 	netdev_features_change(netdev);
 

drivers/net/ethernet/intel/ixgbe/ixgbe_lib.c

@@ -981,7 +981,7 @@ static int ixgbe_alloc_q_vector(struct ixgbe_adapter *adapter,
 			set_bit(__IXGBE_RX_CSUM_UDP_ZERO_ERR, &ring->state);
 
 #ifdef IXGBE_FCOE
-		if (adapter->netdev->features & NETIF_F_FCOE_MTU) {
+		if (adapter->netdev->fcoe_mtu) {
 			struct ixgbe_ring_feature *f;
 			f = &adapter->ring_feature[RING_F_FCOE];
 			if ((rxr_idx >= f->offset) &&

drivers/net/ethernet/intel/ixgbe/ixgbe_main.c

@@ -5079,7 +5079,7 @@ static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
 		netif_set_tso_max_size(adapter->netdev, 32768);
 
 #ifdef IXGBE_FCOE
-	if (adapter->netdev->features & NETIF_F_FCOE_MTU)
+	if (adapter->netdev->fcoe_mtu)
 		max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);
 #endif
 
@@ -5136,8 +5136,7 @@ static int ixgbe_hpbthresh(struct ixgbe_adapter *adapter, int pb)
 
 #ifdef IXGBE_FCOE
 	/* FCoE traffic class uses FCOE jumbo frames */
-	if ((dev->features & NETIF_F_FCOE_MTU) &&
-	    (tc < IXGBE_FCOE_JUMBO_FRAME_SIZE) &&
+	if (dev->fcoe_mtu && tc < IXGBE_FCOE_JUMBO_FRAME_SIZE &&
 	    (pb == ixgbe_fcoe_get_tc(adapter)))
 		tc = IXGBE_FCOE_JUMBO_FRAME_SIZE;
 #endif
@@ -5197,8 +5196,7 @@ static int ixgbe_lpbthresh(struct ixgbe_adapter *adapter, int pb)
 
 #ifdef IXGBE_FCOE
 	/* FCoE traffic class uses FCOE jumbo frames */
-	if ((dev->features & NETIF_F_FCOE_MTU) &&
-	    (tc < IXGBE_FCOE_JUMBO_FRAME_SIZE) &&
+	if (dev->fcoe_mtu && tc < IXGBE_FCOE_JUMBO_FRAME_SIZE &&
 	    (pb == netdev_get_prio_tc_map(dev, adapter->fcoe.up)))
 		tc = IXGBE_FCOE_JUMBO_FRAME_SIZE;
 #endif
@@ -11096,8 +11094,7 @@ static int ixgbe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 				    NETIF_F_FCOE_CRC;
 
 		netdev->vlan_features |= NETIF_F_FSO |
-					 NETIF_F_FCOE_CRC |
-					 NETIF_F_FCOE_MTU;
+					 NETIF_F_FCOE_CRC;
 	}
 #endif /* IXGBE_FCOE */
 	if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)

drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c

@@ -495,7 +495,7 @@ static int ixgbe_set_vf_lpe(struct ixgbe_adapter *adapter, u32 max_frame, u32 vf
 		int err = 0;
 
 #ifdef CONFIG_FCOE
-		if (dev->features & NETIF_F_FCOE_MTU)
+		if (dev->fcoe_mtu)
 			pf_max_frame = max_t(int, pf_max_frame,
 					     IXGBE_FCOE_JUMBO_FRAME_SIZE);
 
@@ -857,7 +857,7 @@ static void ixgbe_set_vf_rx_tx(struct ixgbe_adapter *adapter, int vf)
 		int pf_max_frame = dev->mtu + ETH_HLEN;
 
 #if IS_ENABLED(CONFIG_FCOE)
-		if (dev->features & NETIF_F_FCOE_MTU)
+		if (dev->fcoe_mtu)
 			pf_max_frame = max_t(int, pf_max_frame,
 					     IXGBE_FCOE_JUMBO_FRAME_SIZE);
 #endif /* CONFIG_FCOE */

drivers/net/ethernet/marvell/prestera/prestera_main.c

@@ -633,7 +633,8 @@ static int prestera_port_create(struct prestera_switch *sw, u32 id)
 	if (err)
 		goto err_dl_port_register;
 
-	dev->features |= NETIF_F_NETNS_LOCAL | NETIF_F_HW_TC;
+	dev->features |= NETIF_F_HW_TC;
+	dev->netns_local = true;
 	dev->netdev_ops = &prestera_netdev_ops;
 	dev->ethtool_ops = &prestera_ethtool_ops;
 	SET_NETDEV_DEV(dev, sw->dev->dev);

drivers/net/ethernet/mellanox/mlx5/core/en_main.c

@@ -4414,9 +4414,9 @@ static netdev_features_t mlx5e_fix_features(struct net_device *netdev,
 
 	if (mlx5e_is_uplink_rep(priv)) {
 		features = mlx5e_fix_uplink_rep_features(netdev, features);
-		features |= NETIF_F_NETNS_LOCAL;
+		netdev->netns_local = true;
 	} else {
-		features &= ~NETIF_F_NETNS_LOCAL;
+		netdev->netns_local = false;
 	}
 
 	mutex_unlock(&priv->state_lock);

drivers/net/ethernet/mellanox/mlx5/core/en_rep.c

@@ -898,7 +898,8 @@ static void mlx5e_build_rep_netdev(struct net_device *netdev,
 	netdev->hw_features    |= NETIF_F_RXCSUM;
 
 	netdev->features |= netdev->hw_features;
-	netdev->features |= NETIF_F_NETNS_LOCAL;
+
+	netdev->netns_local = true;
 }
 
 static int mlx5e_init_rep(struct mlx5_core_dev *mdev,

drivers/net/ethernet/mellanox/mlxsw/spectrum.c

@@ -1676,9 +1676,11 @@ static int mlxsw_sp_port_create(struct mlxsw_sp *mlxsw_sp, u16 local_port,
 
 	netif_carrier_off(dev);
 
-	dev->features |= NETIF_F_NETNS_LOCAL | NETIF_F_LLTX | NETIF_F_SG |
-			 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_TC;
+	dev->features |= NETIF_F_SG | NETIF_F_HW_VLAN_CTAG_FILTER |
+			 NETIF_F_HW_TC;
 	dev->hw_features |= NETIF_F_HW_TC | NETIF_F_LOOPBACK;
+	dev->lltx = true;
+	dev->netns_local = true;
 
 	dev->min_mtu = ETH_MIN_MTU;
 	dev->max_mtu = MLXSW_PORT_MAX_MTU - MLXSW_PORT_ETH_FRAME_HDR;

drivers/net/ethernet/microchip/lan966x/lan966x_main.c

@@ -816,7 +816,7 @@ static int lan966x_probe_port(struct lan966x *lan966x, u32 p,
 			 NETIF_F_HW_VLAN_STAG_TX |
 			 NETIF_F_HW_TC;
 	dev->hw_features |= NETIF_F_HW_TC;
-	dev->priv_flags |= IFF_SEE_ALL_HWTSTAMP_REQUESTS;
+	dev->see_all_hwtstamp_requests = true;
 	dev->needed_headroom = IFH_LEN_BYTES;
 
 	eth_hw_addr_gen(dev, lan966x->base_mac, p + 1);

drivers/net/ethernet/netronome/nfp/nfp_net_repr.c

@@ -248,7 +248,6 @@ nfp_repr_fix_features(struct net_device *netdev, netdev_features_t features)
 
 	features = netdev_intersect_features(features, lower_features);
 	features |= old_features & (NETIF_F_SOFT_FEATURES | NETIF_F_HW_TC);
-	features |= NETIF_F_LLTX;
 
 	return features;
 }
@@ -386,7 +385,7 @@ int nfp_repr_init(struct nfp_app *app, struct net_device *netdev,
 	netif_set_tso_max_segs(netdev, NFP_NET_LSO_MAX_SEGS);
 
 	netdev->priv_flags |= IFF_NO_QUEUE | IFF_DISABLE_NETPOLL;
-	netdev->features |= NETIF_F_LLTX;
+	netdev->lltx = true;
 
 	if (nfp_app_has_tc(app)) {
 		netdev->features |= NETIF_F_HW_TC;

drivers/net/ethernet/pasemi/pasemi_mac.c

@@ -1699,8 +1699,9 @@ pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 	netif_napi_add(dev, &mac->napi, pasemi_mac_poll);
 
-	dev->features = NETIF_F_IP_CSUM | NETIF_F_LLTX | NETIF_F_SG |
-			NETIF_F_HIGHDMA | NETIF_F_GSO;
+	dev->features = NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA |
+			NETIF_F_GSO;
+	dev->lltx = true;
 
 	mac->dma_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa007, NULL);
 	if (!mac->dma_pdev) {

drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.c

@@ -286,7 +286,7 @@ void rmnet_vnd_setup(struct net_device *rmnet_dev)
 	rmnet_dev->needs_free_netdev = true;
 	rmnet_dev->ethtool_ops = &rmnet_ethtool_ops;
 
-	rmnet_dev->features |= NETIF_F_LLTX;
+	rmnet_dev->lltx = true;
 
 	/* This perm addr will be used as interface identifier by IPv6 */
 	rmnet_dev->addr_assign_type = NET_ADDR_RANDOM;