Merge tag 'net-6.1-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Pull networking fixes from Jakub Kicinski:
 "Including fixes from netfilter, wifi, can and bpf.

  Current release - new code bugs:

   - can: af_can: can_exit(): add missing dev_remove_pack() of
     canxl_packet

  Previous releases - regressions:

   - bpf, sockmap: fix the sk->sk_forward_alloc warning

   - wifi: mac80211: fix general-protection-fault in
     ieee80211_subif_start_xmit()

   - can: af_can: fix NULL pointer dereference in can_rx_register()

   - can: dev: fix skb drop check, avoid o-o-b access

   - nfnetlink: fix potential dead lock in nfnetlink_rcv_msg()

  Previous releases - always broken:

   - bpf: fix wrong reg type conversion in release_reference()

   - gso: fix panic on frag_list with mixed head alloc types

   - wifi: brcmfmac: fix buffer overflow in brcmf_fweh_event_worker()

   - wifi: mac80211: set TWT Information Frame Disabled bit as 1

   - eth: macsec offload related fixes, make sure to clear the keys from
     memory

   - tun: fix memory leaks in the use of napi_get_frags

   - tun: call napi_schedule_prep() to ensure we own a napi

   - tcp: prohibit TCP_REPAIR_OPTIONS if data was already sent

   - ipv6: addrlabel: fix infoleak when sending struct ifaddrlblmsg to
     network

   - tipc: fix a msg->req tlv length check

   - sctp: clear out_curr if all frag chunks of current msg are pruned,
     avoid list corruption

   - mctp: fix an error handling path in mctp_init(), avoid leaks"

* tag 'net-6.1-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (101 commits)
  eth: sp7021: drop free_netdev() from spl2sw_init_netdev()
  MAINTAINERS: Move Vivien to CREDITS
  net: macvlan: fix memory leaks of macvlan_common_newlink
  ethernet: tundra: free irq when alloc ring failed in tsi108_open()
  net: mv643xx_eth: disable napi when init rxq or txq failed in mv643xx_eth_open()
  ethernet: s2io: disable napi when start nic failed in s2io_card_up()
  net: atlantic: macsec: clear encryption keys from the stack
  net: phy: mscc: macsec: clear encryption keys when freeing a flow
  stmmac: dwmac-loongson: fix missing of_node_put() while module exiting
  stmmac: dwmac-loongson: fix missing pci_disable_device() in loongson_dwmac_probe()
  stmmac: dwmac-loongson: fix missing pci_disable_msi() while module exiting
  cxgb4vf: shut down the adapter when t4vf_update_port_info() failed in cxgb4vf_open()
  mctp: Fix an error handling path in mctp_init()
  stmmac: intel: Update PCH PTP clock rate from 200MHz to 204.8MHz
  net: cxgb3_main: disable napi when bind qsets failed in cxgb_up()
  net: cpsw: disable napi in cpsw_ndo_open()
  iavf: Fix VF driver counting VLAN 0 filters
  ice: Fix spurious interrupt during removal of trusted VF
  net/mlx5e: TC, Fix slab-out-of-bounds in parse_tc_actions
  net/mlx5e: E-Switch, Fix comparing termination table instance
  ...

1 files changed, 7 insertions, 36 deletions

diff --git a/drivers/net/wwan/iosm/iosm_ipc_wwan.c b/drivers/net/wwan/iosm/iosm_ipc_wwan.c
index 2f1f8b5d5b59..4c9022a93e01 100644
--- a/drivers/net/wwan/iosm/iosm_ipc_wwan.c
+++ b/drivers/net/wwan/iosm/iosm_ipc_wwan.c
@@ -40,13 +40,11 @@ struct iosm_netdev_priv {
  * @ipc_imem:		Pointer to imem data-struct
  * @sub_netlist:	List of active netdevs
  * @dev:		Pointer device structure
- * @if_mutex:		Mutex used for add and remove interface id
  */
 struct iosm_wwan {
 	struct iosm_imem *ipc_imem;
 	struct iosm_netdev_priv __rcu *sub_netlist[IP_MUX_SESSION_END + 1];
 	struct device *dev;
-	struct mutex if_mutex; /* Mutex used for add and remove interface id */
 };
 
 /* Bring-up the wwan net link */
@@ -55,14 +53,11 @@ static int ipc_wwan_link_open(struct net_device *netdev)
 	struct iosm_netdev_priv *priv = wwan_netdev_drvpriv(netdev);
 	struct iosm_wwan *ipc_wwan = priv->ipc_wwan;
 	int if_id = priv->if_id;
-	int ret;
 
 	if (if_id < IP_MUX_SESSION_START ||
 	    if_id >= ARRAY_SIZE(ipc_wwan->sub_netlist))
 		return -EINVAL;
 
-	mutex_lock(&ipc_wwan->if_mutex);
-
 	/* get channel id */
 	priv->ch_id = ipc_imem_sys_wwan_open(ipc_wwan->ipc_imem, if_id);
 
@@ -70,8 +65,7 @@ static int ipc_wwan_link_open(struct net_device *netdev)
 		dev_err(ipc_wwan->dev,
 			"cannot connect wwan0 & id %d to the IPC mem layer",
 			if_id);
-		ret = -ENODEV;
-		goto out;
+		return -ENODEV;
 	}
 
 	/* enable tx path, DL data may follow */
@@ -80,10 +74,7 @@ static int ipc_wwan_link_open(struct net_device *netdev)
 	dev_dbg(ipc_wwan->dev, "Channel id %d allocated to if_id %d",
 		priv->ch_id, priv->if_id);
 
-	ret = 0;
-out:
-	mutex_unlock(&ipc_wwan->if_mutex);
-	return ret;
+	return 0;
 }
 
 /* Bring-down the wwan net link */
@@ -93,11 +84,9 @@ static int ipc_wwan_link_stop(struct net_device *netdev)
 
 	netif_stop_queue(netdev);
 
-	mutex_lock(&priv->ipc_wwan->if_mutex);
 	ipc_imem_sys_wwan_close(priv->ipc_wwan->ipc_imem, priv->if_id,
 				priv->ch_id);
 	priv->ch_id = -1;
-	mutex_unlock(&priv->ipc_wwan->if_mutex);
 
 	return 0;
 }
@@ -168,6 +157,7 @@ static void ipc_wwan_setup(struct net_device *iosm_dev)
 	iosm_dev->max_mtu = ETH_MAX_MTU;
 
 	iosm_dev->flags = IFF_POINTOPOINT | IFF_NOARP;
+	iosm_dev->needs_free_netdev = true;
 
 	iosm_dev->netdev_ops = &ipc_inm_ops;
 }
@@ -189,26 +179,17 @@ static int ipc_wwan_newlink(void *ctxt, struct net_device *dev,
 	priv->netdev = dev;
 	priv->ipc_wwan = ipc_wwan;
 
-	mutex_lock(&ipc_wwan->if_mutex);
-	if (rcu_access_pointer(ipc_wwan->sub_netlist[if_id])) {
-		err = -EBUSY;
-		goto out_unlock;
-	}
+	if (rcu_access_pointer(ipc_wwan->sub_netlist[if_id]))
+		return -EBUSY;
 
 	err = register_netdevice(dev);
 	if (err)
-		goto out_unlock;
+		return err;
 
 	rcu_assign_pointer(ipc_wwan->sub_netlist[if_id], priv);
-	mutex_unlock(&ipc_wwan->if_mutex);
-
 	netif_device_attach(dev);
 
 	return 0;
-
-out_unlock:
-	mutex_unlock(&ipc_wwan->if_mutex);
-	return err;
 }
 
 static void ipc_wwan_dellink(void *ctxt, struct net_device *dev,
@@ -222,17 +203,12 @@ static void ipc_wwan_dellink(void *ctxt, struct net_device *dev,
 		    if_id >= ARRAY_SIZE(ipc_wwan->sub_netlist)))
 		return;
 
-	mutex_lock(&ipc_wwan->if_mutex);
-
 	if (WARN_ON(rcu_access_pointer(ipc_wwan->sub_netlist[if_id]) != priv))
-		goto unlock;
+		return;
 
 	RCU_INIT_POINTER(ipc_wwan->sub_netlist[if_id], NULL);
 	/* unregistering includes synchronize_net() */
 	unregister_netdevice_queue(dev, head);
-
-unlock:
-	mutex_unlock(&ipc_wwan->if_mutex);
 }
 
 static const struct wwan_ops iosm_wwan_ops = {
@@ -323,12 +299,9 @@ struct iosm_wwan *ipc_wwan_init(struct iosm_imem *ipc_imem, struct device *dev)
 	ipc_wwan->dev = dev;
 	ipc_wwan->ipc_imem = ipc_imem;
 
-	mutex_init(&ipc_wwan->if_mutex);
-
 	/* WWAN core will create a netdev for the default IP MUX channel */
 	if (wwan_register_ops(ipc_wwan->dev, &iosm_wwan_ops, ipc_wwan,
 			      IP_MUX_SESSION_DEFAULT)) {
-		mutex_destroy(&ipc_wwan->if_mutex);
 		kfree(ipc_wwan);
 		return NULL;
 	}
@@ -341,7 +314,5 @@ void ipc_wwan_deinit(struct iosm_wwan *ipc_wwan)
 	/* This call will remove all child netdev(s) */
 	wwan_unregister_ops(ipc_wwan->dev);
 
-	mutex_destroy(&ipc_wwan->if_mutex);
-
 	kfree(ipc_wwan);
 }