Merge tag 'net-next-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Jakub Kicinski:
 "The sprinkling of SPI drivers is because we added a new one and Mark
  sent us a SPI driver interface conversion pull request.

  Core
  ----

   - Introduce XDP multi-buffer support, allowing the use of XDP with
     jumbo frame MTUs and combination with Rx coalescing offloads (LRO).

   - Speed up netns dismantling (5x) and lower the memory cost a little.
     Remove unnecessary per-netns sockets. Scope some lists to a netns.
     Cut down RCU syncing. Use batch methods. Allow netdev registration
     to complete out of order.

   - Support distinguishing timestamp types (ingress vs egress) and
     maintaining them across packet scrubbing points (e.g. redirect).

   - Continue the work of annotating packet drop reasons throughout the
     stack.

   - Switch netdev error counters from an atomic to dynamically
     allocated per-CPU counters.

   - Rework a few preempt_disable(), local_irq_save() and busy waiting
     sections problematic on PREEMPT_RT.

   - Extend the ref_tracker to allow catching use-after-free bugs.

  BPF
  ---

   - Introduce "packing allocator" for BPF JIT images. JITed code is
     marked read only, and used to be allocated at page granularity.
     Custom allocator allows for more efficient memory use, lower iTLB
     pressure and prevents identity mapping huge pages from getting
     split.

   - Make use of BTF type annotations (e.g. __user, __percpu) to enforce
     the correct probe read access method, add appropriate helpers.

   - Convert the BPF preload to use light skeleton and drop the
     user-mode-driver dependency.

   - Allow XDP BPF_PROG_RUN test infra to send real packets, enabling
     its use as a packet generator.

   - Allow local storage memory to be allocated with GFP_KERNEL if
     called from a hook allowed to sleep.

   - Introduce fprobe (multi kprobe) to speed up mass attachment (arch
     bits to come later).

   - Add unstable conntrack lookup helpers for BPF by using the BPF
     kfunc infra.

   - Allow cgroup BPF progs to return custom errors to user space.

   - Add support for AF_UNIX iterator batching.

   - Allow iterator programs to use sleepable helpers.

   - Support JIT of add, and, or, xor and xchg atomic ops on arm64.

   - Add BTFGen support to bpftool which allows to use CO-RE in kernels
     without BTF info.

   - Large number of libbpf API improvements, cleanups and deprecations.

  Protocols
  ---------

   - Micro-optimize UDPv6 Tx, gaining up to 5% in test on dummy netdev.

   - Adjust TSO packet sizes based on min_rtt, allowing very low latency
     links (data centers) to always send full-sized TSO super-frames.

   - Make IPv6 flow label changes (AKA hash rethink) more configurable,
     via sysctl and setsockopt. Distinguish between server and client
     behavior.

   - VxLAN support to "collect metadata" devices to terminate only
     configured VNIs. This is similar to VLAN filtering in the bridge.

   - Support inserting IPv6 IOAM information to a fraction of frames.

   - Add protocol attribute to IP addresses to allow identifying where
     given address comes from (kernel-generated, DHCP etc.)

   - Support setting socket and IPv6 options via cmsg on ping6 sockets.

   - Reject mis-use of ECN bits in IP headers as part of DSCP/TOS.
     Define dscp_t and stop taking ECN bits into account in fib-rules.

   - Add support for locked bridge ports (for 802.1X).

   - tun: support NAPI for packets received from batched XDP buffs,
     doubling the performance in some scenarios.

   - IPv6 extension header handling in Open vSwitch.

   - Support IPv6 control message load balancing in bonding, prevent
     neighbor solicitation and advertisement from using the wrong port.
     Support NS/NA monitor selection similar to existing ARP monitor.

   - SMC
      - improve performance with TCP_CORK and sendfile()
      - support auto-corking
      - support TCP_NODELAY

   - MCTP (Management Component Transport Protocol)
      - add user space tag control interface
      - I2C binding driver (as specified by DMTF DSP0237)

   - Multi-BSSID beacon handling in AP mode for WiFi.

   - Bluetooth:
      - handle MSFT Monitor Device Event
      - add MGMT Adv Monitor Device Found/Lost events

   - Multi-Path TCP:
      - add support for the SO_SNDTIMEO socket option
      - lots of selftest cleanups and improvements

   - Increase the max PDU size in CAN ISOTP to 64 kB.

  Driver API
  ----------

   - Add HW counters for SW netdevs, a mechanism for devices which
     offload packet forwarding to report packet statistics back to
     software interfaces such as tunnels.

   - Select the default NIC queue count as a fraction of number of
     physical CPU cores, instead of hard-coding to 8.

   - Expose devlink instance locks to drivers. Allow device layer of
     drivers to use that lock directly instead of creating their own
     which always runs into ordering issues in devlink callbacks.

   - Add header/data split indication to guide user space enabling of
     TCP zero-copy Rx.

   - Allow configuring completion queue event size.

   - Refactor page_pool to enable fragmenting after allocation.

   - Add allocation and page reuse statistics to page_pool.

   - Improve Multiple Spanning Trees support in the bridge to allow
     reuse of topologies across VLANs, saving HW resources in switches.

   - DSA (Distributed Switch Architecture):
      - replay and offload of host VLAN entries
      - offload of static and local FDB entries on LAG interfaces
      - FDB isolation and unicast filtering

  New hardware / drivers
  ----------------------

   - Ethernet:
      - LAN937x T1 PHYs
      - Davicom DM9051 SPI NIC driver
      - Realtek RTL8367S, RTL8367RB-VB switch and MDIO
      - Microchip ksz8563 switches
      - Netronome NFP3800 SmartNICs
      - Fungible SmartNICs
      - MediaTek MT8195 switches

   - WiFi:
      - mt76: MediaTek mt7916
      - mt76: MediaTek mt7921u USB adapters
      - brcmfmac: Broadcom BCM43454/6

   - Mobile:
      - iosm: Intel M.2 7360 WWAN card

  Drivers
  -------

   - Convert many drivers to the new phylink API built for split PCS
     designs but also simplifying other cases.

   - Intel Ethernet NICs:
      - add TTY for GNSS module for E810T device
      - improve AF_XDP performance
      - GTP-C and GTP-U filter offload
      - QinQ VLAN support

   - Mellanox Ethernet NICs (mlx5):
      - support xdp->data_meta
      - multi-buffer XDP
      - offload tc push_eth and pop_eth actions

   - Netronome Ethernet NICs (nfp):
      - flow-independent tc action hardware offload (police / meter)
      - AF_XDP

   - Other Ethernet NICs:
      - at803x: fiber and SFP support
      - xgmac: mdio: preamble suppression and custom MDC frequencies
      - r8169: enable ASPM L1.2 if system vendor flags it as safe
      - macb/gem: ZynqMP SGMII
      - hns3: add TX push mode
      - dpaa2-eth: software TSO
      - lan743x: multi-queue, mdio, SGMII, PTP
      - axienet: NAPI and GRO support

   - Mellanox Ethernet switches (mlxsw):
      - source and dest IP address rewrites
      - RJ45 ports

   - Marvell Ethernet switches (prestera):
      - basic routing offload
      - multi-chain TC ACL offload

   - NXP embedded Ethernet switches (ocelot & felix):
      - PTP over UDP with the ocelot-8021q DSA tagging protocol
      - basic QoS classification on Felix DSA switch using dcbnl
      - port mirroring for ocelot switches

   - Microchip high-speed industrial Ethernet (sparx5):
      - offloading of bridge port flooding flags
      - PTP Hardware Clock

   - Other embedded switches:
      - lan966x: PTP Hardward Clock
      - qca8k: mdio read/write operations via crafted Ethernet packets

   - Qualcomm 802.11ax WiFi (ath11k):
      - add LDPC FEC type and 802.11ax High Efficiency data in radiotap
      - enable RX PPDU stats in monitor co-exist mode

   - Intel WiFi (iwlwifi):
      - UHB TAS enablement via BIOS
      - band disablement via BIOS
      - channel switch offload
      - 32 Rx AMPDU sessions in newer devices

   - MediaTek WiFi (mt76):
      - background radar detection
      - thermal management improvements on mt7915
      - SAR support for more mt76 platforms
      - MBSSID and 6 GHz band on mt7915

   - RealTek WiFi:
      - rtw89: AP mode
      - rtw89: 160 MHz channels and 6 GHz band
      - rtw89: hardware scan

   - Bluetooth:
      - mt7921s: wake on Bluetooth, SCO over I2S, wide-band-speed (WBS)

   - Microchip CAN (mcp251xfd):
      - multiple RX-FIFOs and runtime configurable RX/TX rings
      - internal PLL, runtime PM handling simplification
      - improve chip detection and error handling after wakeup"

* tag 'net-next-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2521 commits)
  llc: fix netdevice reference leaks in llc_ui_bind()
  drivers: ethernet: cpsw: fix panic when interrupt coaleceing is set via ethtool
  ice: don't allow to run ice_send_event_to_aux() in atomic ctx
  ice: fix 'scheduling while atomic' on aux critical err interrupt
  net/sched: fix incorrect vlan_push_eth dest field
  net: bridge: mst: Restrict info size queries to bridge ports
  net: marvell: prestera: add missing destroy_workqueue() in prestera_module_init()
  drivers: net: xgene: Fix regression in CRC stripping
  net: geneve: add missing netlink policy and size for IFLA_GENEVE_INNER_PROTO_INHERIT
  net: dsa: fix missing host-filtered multicast addresses
  net/mlx5e: Fix build warning, detected write beyond size of field
  iwlwifi: mvm: Don't fail if PPAG isn't supported
  selftests/bpf: Fix kprobe_multi test.
  Revert "rethook: x86: Add rethook x86 implementation"
  Revert "arm64: rethook: Add arm64 rethook implementation"
  Revert "powerpc: Add rethook support"
  Revert "ARM: rethook: Add rethook arm implementation"
  netdevice: add missing dm_private kdoc
  net: bridge: mst: prevent NULL deref in br_mst_info_size()
  selftests: forwarding: Use same VRF for port and VLAN upper
  ...

8 files changed, 119 insertions, 107 deletions

diff --git a/drivers/net/usb/Kconfig b/drivers/net/usb/Kconfig
index b554054a7560..e62fc4f2aee0 100644
--- a/drivers/net/usb/Kconfig
+++ b/drivers/net/usb/Kconfig
@@ -358,6 +358,7 @@ config USB_NET_SMSC95XX
 	select BITREVERSE
 	select CRC16
 	select CRC32
+	imply NET_SELFTESTS
 	help
 	  This option adds support for SMSC LAN95XX based USB 2.0
 	  10/100 Ethernet adapters.
diff --git a/drivers/net/usb/asix.h b/drivers/net/usb/asix.h
index 2a1e31defe71..2c81236c6c7c 100644
--- a/drivers/net/usb/asix.h
+++ b/drivers/net/usb/asix.h
@@ -158,6 +158,8 @@
 #define AX_EEPROM_MAGIC		0xdeadbeef
 #define AX_EEPROM_LEN		0x200
 
+#define AX_EMBD_PHY_ADDR	0x10
+
 /* This structure cannot exceed sizeof(unsigned long [5]) AKA 20 bytes */
 struct asix_data {
 	u8 multi_filter[AX_MCAST_FILTER_SIZE];
@@ -177,14 +179,16 @@ struct asix_rx_fixup_info {
 struct asix_common_private {
 	void (*resume)(struct usbnet *dev);
 	void (*suspend)(struct usbnet *dev);
+	int (*reset)(struct usbnet *dev, int in_pm);
 	u16 presvd_phy_advertise;
 	u16 presvd_phy_bmcr;
 	struct asix_rx_fixup_info rx_fixup_info;
 	struct mii_bus *mdio;
 	struct phy_device *phydev;
+	struct phy_device *phydev_int;
 	u16 phy_addr;
-	char phy_name[20];
 	bool embd_phy;
+	u8 chipcode;
 };
 
 extern const struct driver_info ax88172a_info;
@@ -192,8 +196,8 @@ extern const struct driver_info ax88172a_info;
 /* ASIX specific flags */
 #define FLAG_EEPROM_MAC		(1UL << 0)  /* init device MAC from eeprom */
 
-int asix_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
-		  u16 size, void *data, int in_pm);
+int __must_check asix_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
+			       u16 size, void *data, int in_pm);
 
 int asix_write_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
 		   u16 size, void *data, int in_pm);
diff --git a/drivers/net/usb/asix_common.c b/drivers/net/usb/asix_common.c
index 71682970be58..632fa6c1d5e3 100644
--- a/drivers/net/usb/asix_common.c
+++ b/drivers/net/usb/asix_common.c
@@ -11,8 +11,8 @@
 
 #define AX_HOST_EN_RETRIES	30
 
-int asix_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
-		  u16 size, void *data, int in_pm)
+int __must_check asix_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
+			       u16 size, void *data, int in_pm)
 {
 	int ret;
 	int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
@@ -27,9 +27,12 @@ int asix_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
 	ret = fn(dev, cmd, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 		 value, index, data, size);
 
-	if (unlikely(ret < 0))
+	if (unlikely(ret < size)) {
+		ret = ret < 0 ? ret : -ENODATA;
+
 		netdev_warn(dev->net, "Failed to read reg index 0x%04x: %d\n",
 			    index, ret);
+	}
 
 	return ret;
 }
@@ -79,7 +82,7 @@ static int asix_check_host_enable(struct usbnet *dev, int in_pm)
 				    0, 0, 1, &smsr, in_pm);
 		if (ret == -ENODEV)
 			break;
-		else if (ret < sizeof(smsr))
+		else if (ret < 0)
 			continue;
 		else if (smsr & AX_HOST_EN)
 			break;
@@ -488,7 +491,8 @@ void asix_set_multicast(struct net_device *net)
 	asix_write_cmd_async(dev, AX_CMD_WRITE_RX_CTL, rx_ctl, 0, 0, NULL);
 }
 
-int asix_mdio_read(struct net_device *netdev, int phy_id, int loc)
+static int __asix_mdio_read(struct net_device *netdev, int phy_id, int loc,
+			    bool in_pm)
 {
 	struct usbnet *dev = netdev_priv(netdev);
 	__le16 res;
@@ -496,18 +500,18 @@ int asix_mdio_read(struct net_device *netdev, int phy_id, int loc)
 
 	mutex_lock(&dev->phy_mutex);
 
-	ret = asix_check_host_enable(dev, 0);
+	ret = asix_check_host_enable(dev, in_pm);
 	if (ret == -ENODEV || ret == -ETIMEDOUT) {
 		mutex_unlock(&dev->phy_mutex);
 		return ret;
 	}
 
 	ret = asix_read_cmd(dev, AX_CMD_READ_MII_REG, phy_id, (__u16)loc, 2,
-			    &res, 0);
+			    &res, in_pm);
 	if (ret < 0)
 		goto out;
 
-	ret = asix_set_hw_mii(dev, 0);
+	ret = asix_set_hw_mii(dev, in_pm);
 out:
 	mutex_unlock(&dev->phy_mutex);
 
@@ -517,8 +521,13 @@ out:
 	return ret < 0 ? ret : le16_to_cpu(res);
 }
 
+int asix_mdio_read(struct net_device *netdev, int phy_id, int loc)
+{
+	return __asix_mdio_read(netdev, phy_id, loc, false);
+}
+
 static int __asix_mdio_write(struct net_device *netdev, int phy_id, int loc,
-			     int val)
+			     int val, bool in_pm)
 {
 	struct usbnet *dev = netdev_priv(netdev);
 	__le16 res = cpu_to_le16(val);
@@ -529,16 +538,16 @@ static int __asix_mdio_write(struct net_device *netdev, int phy_id, int loc,
 
 	mutex_lock(&dev->phy_mutex);
 
-	ret = asix_check_host_enable(dev, 0);
+	ret = asix_check_host_enable(dev, in_pm);
 	if (ret == -ENODEV)
 		goto out;
 
 	ret = asix_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id, (__u16)loc, 2,
-			     &res, 0);
+			     &res, in_pm);
 	if (ret < 0)
 		goto out;
 
-	ret = asix_set_hw_mii(dev, 0);
+	ret = asix_set_hw_mii(dev, in_pm);
 out:
 	mutex_unlock(&dev->phy_mutex);
 
@@ -547,7 +556,7 @@ out:
 
 void asix_mdio_write(struct net_device *netdev, int phy_id, int loc, int val)
 {
-	__asix_mdio_write(netdev, phy_id, loc, val);
+	__asix_mdio_write(netdev, phy_id, loc, val, false);
 }
 
 /* MDIO read and write wrappers for phylib */
@@ -555,63 +564,25 @@ int asix_mdio_bus_read(struct mii_bus *bus, int phy_id, int regnum)
 {
 	struct usbnet *priv = bus->priv;
 
-	return asix_mdio_read(priv->net, phy_id, regnum);
+	return __asix_mdio_read(priv->net, phy_id, regnum, false);
 }
 
 int asix_mdio_bus_write(struct mii_bus *bus, int phy_id, int regnum, u16 val)
 {
 	struct usbnet *priv = bus->priv;
 
-	return __asix_mdio_write(priv->net, phy_id, regnum, val);
+	return __asix_mdio_write(priv->net, phy_id, regnum, val, false);
 }
 
 int asix_mdio_read_nopm(struct net_device *netdev, int phy_id, int loc)
 {
-	struct usbnet *dev = netdev_priv(netdev);
-	__le16 res;
-	int ret;
-
-	mutex_lock(&dev->phy_mutex);
-
-	ret = asix_check_host_enable(dev, 1);
-	if (ret == -ENODEV || ret == -ETIMEDOUT) {
-		mutex_unlock(&dev->phy_mutex);
-		return ret;
-	}
-
-	asix_read_cmd(dev, AX_CMD_READ_MII_REG, phy_id,
-		      (__u16)loc, 2, &res, 1);
-	asix_set_hw_mii(dev, 1);
-	mutex_unlock(&dev->phy_mutex);
-
-	netdev_dbg(dev->net, "asix_mdio_read_nopm() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n",
-			phy_id, loc, le16_to_cpu(res));
-
-	return le16_to_cpu(res);
+	return __asix_mdio_read(netdev, phy_id, loc, true);
 }
 
 void
 asix_mdio_write_nopm(struct net_device *netdev, int phy_id, int loc, int val)
 {
-	struct usbnet *dev = netdev_priv(netdev);
-	__le16 res = cpu_to_le16(val);
-	int ret;
-
-	netdev_dbg(dev->net, "asix_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n",
-			phy_id, loc, val);
-
-	mutex_lock(&dev->phy_mutex);
-
-	ret = asix_check_host_enable(dev, 1);
-	if (ret == -ENODEV) {
-		mutex_unlock(&dev->phy_mutex);
-		return;
-	}
-
-	asix_write_cmd(dev, AX_CMD_WRITE_MII_REG, phy_id,
-		       (__u16)loc, 2, &res, 1);
-	asix_set_hw_mii(dev, 1);
-	mutex_unlock(&dev->phy_mutex);
+	__asix_mdio_write(netdev, phy_id, loc, val, true);
 }
 
 void asix_get_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
diff --git a/drivers/net/usb/asix_devices.c b/drivers/net/usb/asix_devices.c
index 4514d35ef4c4..38e47a93fb83 100644
--- a/drivers/net/usb/asix_devices.c
+++ b/drivers/net/usb/asix_devices.c
@@ -450,7 +450,6 @@ static int ax88772a_hw_reset(struct usbnet *dev, int in_pm)
 	struct asix_data *data = (struct asix_data *)&dev->data;
 	struct asix_common_private *priv = dev->driver_priv;
 	u16 rx_ctl, phy14h, phy15h, phy16h;
-	u8 chipcode = 0;
 	int ret;
 
 	ret = asix_write_gpio(dev, AX_GPIO_RSE, 5, in_pm);
@@ -493,12 +492,7 @@ static int ax88772a_hw_reset(struct usbnet *dev, int in_pm)
 		goto out;
 	}
 
-	ret = asix_read_cmd(dev, AX_CMD_STATMNGSTS_REG, 0,
-			    0, 1, &chipcode, in_pm);
-	if (ret < 0)
-		goto out;
-
-	if ((chipcode & AX_CHIPCODE_MASK) == AX_AX88772B_CHIPCODE) {
+	if (priv->chipcode == AX_AX88772B_CHIPCODE) {
 		ret = asix_write_cmd(dev, AX_QCTCTRL, 0x8000, 0x8001,
 				     0, NULL, in_pm);
 		if (ret < 0) {
@@ -506,7 +500,7 @@ static int ax88772a_hw_reset(struct usbnet *dev, int in_pm)
 				   ret);
 			goto out;
 		}
-	} else if ((chipcode & AX_CHIPCODE_MASK) == AX_AX88772A_CHIPCODE) {
+	} else if (priv->chipcode == AX_AX88772A_CHIPCODE) {
 		/* Check if the PHY registers have default settings */
 		phy14h = asix_mdio_read_nopm(dev->net, dev->mii.phy_id,
 					     AX88772A_PHY14H);
@@ -625,27 +619,13 @@ static void ax88772_resume(struct usbnet *dev)
 	int i;
 
 	for (i = 0; i < 3; i++)
-		if (!ax88772_hw_reset(dev, 1))
+		if (!priv->reset(dev, 1))
 			break;
 
 	if (netif_running(dev->net))
 		phy_start(priv->phydev);
 }
 
-static void ax88772a_resume(struct usbnet *dev)
-{
-	struct asix_common_private *priv = dev->driver_priv;
-	int i;
-
-	for (i = 0; i < 3; i++) {
-		if (!ax88772a_hw_reset(dev, 1))
-			break;
-	}
-
-	if (netif_running(dev->net))
-		phy_start(priv->phydev);
-}
-
 static int asix_resume(struct usb_interface *intf)
 {
 	struct usbnet *dev = usb_get_intfdata(intf);
@@ -681,15 +661,16 @@ static int ax88772_init_phy(struct usbnet *dev)
 	struct asix_common_private *priv = dev->driver_priv;
 	int ret;
 
-	snprintf(priv->phy_name, sizeof(priv->phy_name), PHY_ID_FMT,
-		 priv->mdio->id, priv->phy_addr);
+	priv->phydev = mdiobus_get_phy(priv->mdio, priv->phy_addr);
+	if (!priv->phydev) {
+		netdev_err(dev->net, "Could not find PHY\n");
+		return -ENODEV;
+	}
 
-	priv->phydev = phy_connect(dev->net, priv->phy_name, &asix_adjust_link,
-				   PHY_INTERFACE_MODE_INTERNAL);
-	if (IS_ERR(priv->phydev)) {
-		netdev_err(dev->net, "Could not connect to PHY device %s\n",
-			   priv->phy_name);
-		ret = PTR_ERR(priv->phydev);
+	ret = phy_connect_direct(dev->net, priv->phydev, &asix_adjust_link,
+				 PHY_INTERFACE_MODE_INTERNAL);
+	if (ret) {
+		netdev_err(dev->net, "Could not connect PHY\n");
 		return ret;
 	}
 
@@ -698,13 +679,29 @@ static int ax88772_init_phy(struct usbnet *dev)
 
 	phy_attached_info(priv->phydev);
 
+	if (priv->embd_phy)
+		return 0;
+
+	/* In case main PHY is not the embedded PHY and MAC is RMII clock
+	 * provider, we need to suspend embedded PHY by keeping PLL enabled
+	 * (AX_SWRESET_IPPD == 0).
+	 */
+	priv->phydev_int = mdiobus_get_phy(priv->mdio, AX_EMBD_PHY_ADDR);
+	if (!priv->phydev_int) {
+		netdev_err(dev->net, "Could not find internal PHY\n");
+		return -ENODEV;
+	}
+
+	priv->phydev_int->mac_managed_pm = 1;
+	phy_suspend(priv->phydev_int);
+
 	return 0;
 }
 
 static int ax88772_bind(struct usbnet *dev, struct usb_interface *intf)
 {
-	u8 buf[ETH_ALEN] = {0}, chipcode = 0;
 	struct asix_common_private *priv;
+	u8 buf[ETH_ALEN] = {0};
 	int ret, i;
 
 	priv = devm_kzalloc(&dev->udev->dev, sizeof(*priv), GFP_KERNEL);
@@ -753,14 +750,25 @@ static int ax88772_bind(struct usbnet *dev, struct usb_interface *intf)
 		return ret;
 
 	priv->phy_addr = ret;
-	priv->embd_phy = ((priv->phy_addr & 0x1f) == 0x10);
+	priv->embd_phy = ((priv->phy_addr & 0x1f) == AX_EMBD_PHY_ADDR);
 
-	asix_read_cmd(dev, AX_CMD_STATMNGSTS_REG, 0, 0, 1, &chipcode, 0);
-	chipcode &= AX_CHIPCODE_MASK;
+	ret = asix_read_cmd(dev, AX_CMD_STATMNGSTS_REG, 0, 0, 1,
+			    &priv->chipcode, 0);
+	if (ret < 0) {
+		netdev_dbg(dev->net, "Failed to read STATMNGSTS_REG: %d\n", ret);
+		return ret;
+	}
+
+	priv->chipcode &= AX_CHIPCODE_MASK;
 
-	ret = (chipcode == AX_AX88772_CHIPCODE) ? ax88772_hw_reset(dev, 0) :
-						  ax88772a_hw_reset(dev, 0);
+	priv->resume = ax88772_resume;
+	priv->suspend = ax88772_suspend;
+	if (priv->chipcode == AX_AX88772_CHIPCODE)
+		priv->reset = ax88772_hw_reset;
+	else
+		priv->reset = ax88772a_hw_reset;
 
+	ret = priv->reset(dev, 0);
 	if (ret < 0) {
 		netdev_dbg(dev->net, "Failed to reset AX88772: %d\n", ret);
 		return ret;
@@ -775,13 +783,6 @@ static int ax88772_bind(struct usbnet *dev, struct usb_interface *intf)
 
 	priv->presvd_phy_bmcr = 0;
 	priv->presvd_phy_advertise = 0;
-	if (chipcode == AX_AX88772_CHIPCODE) {
-		priv->resume = ax88772_resume;
-		priv->suspend = ax88772_suspend;
-	} else {
-		priv->resume = ax88772a_resume;
-		priv->suspend = ax88772_suspend;
-	}
 
 	ret = ax88772_init_mdio(dev);
 	if (ret)
@@ -858,7 +859,6 @@ static int marvell_phy_init(struct usbnet *dev)
 		reg = asix_mdio_read(dev->net, dev->mii.phy_id,
 			MII_MARVELL_LED_CTRL);
 		netdev_dbg(dev->net, "MII_MARVELL_LED_CTRL (2) = 0x%04x\n", reg);
-		reg &= 0xfc0f;
 	}
 
 	return 0;
@@ -920,11 +920,21 @@ static int ax88178_reset(struct usbnet *dev)
 	int gpio0 = 0;
 	u32 phyid;
 
-	asix_read_cmd(dev, AX_CMD_READ_GPIOS, 0, 0, 1, &status, 0);
+	ret = asix_read_cmd(dev, AX_CMD_READ_GPIOS, 0, 0, 1, &status, 0);
+	if (ret < 0) {
+		netdev_dbg(dev->net, "Failed to read GPIOS: %d\n", ret);
+		return ret;
+	}
+
 	netdev_dbg(dev->net, "GPIO Status: 0x%04x\n", status);
 
 	asix_write_cmd(dev, AX_CMD_WRITE_ENABLE, 0, 0, 0, NULL, 0);
-	asix_read_cmd(dev, AX_CMD_READ_EEPROM, 0x0017, 0, 2, &eeprom, 0);
+	ret = asix_read_cmd(dev, AX_CMD_READ_EEPROM, 0x0017, 0, 2, &eeprom, 0);
+	if (ret < 0) {
+		netdev_dbg(dev->net, "Failed to read EEPROM: %d\n", ret);
+		return ret;
+	}
+
 	asix_write_cmd(dev, AX_CMD_WRITE_DISABLE, 0, 0, 0, NULL, 0);
 
 	netdev_dbg(dev->net, "EEPROM index 0x17 is 0x%04x\n", eeprom);
diff --git a/drivers/net/usb/cdc_mbim.c b/drivers/net/usb/cdc_mbim.c
index c0b8b4aa78f3..c89639381eca 100644
--- a/drivers/net/usb/cdc_mbim.c
+++ b/drivers/net/usb/cdc_mbim.c
@@ -21,6 +21,7 @@
 #include <net/ipv6.h>
 #include <net/addrconf.h>
 #include <net/ipv6_stubs.h>
+#include <net/ndisc.h>
 
 /* alternative VLAN for IP session 0 if not untagged */
 #define MBIM_IPS0_VID	4094
diff --git a/drivers/net/usb/gl620a.c b/drivers/net/usb/gl620a.c
index 13a9a83b8538..46af78caf457 100644
--- a/drivers/net/usb/gl620a.c
+++ b/drivers/net/usb/gl620a.c
@@ -56,7 +56,7 @@
 
 struct gl_packet {
 	__le32		packet_length;
-	char		packet_data [1];
+	char		packet_data[];
 };
 
 struct gl_header {
diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c
index f97813a4e8d1..f8221a7acf62 100644
--- a/drivers/net/usb/hso.c
+++ b/drivers/net/usb/hso.c
@@ -2319,7 +2319,7 @@ static struct hso_device *hso_create_device(struct usb_interface *intf,
 {
 	struct hso_device *hso_dev;
 
-	hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
+	hso_dev = kzalloc(sizeof(*hso_dev), GFP_KERNEL);
 	if (!hso_dev)
 		return NULL;
 
diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c
index a0f29482294d..4ef61f6b85df 100644
--- a/drivers/net/usb/smsc95xx.c
+++ b/drivers/net/usb/smsc95xx.c
@@ -20,6 +20,8 @@
 #include <linux/of_net.h>
 #include <linux/mdio.h>
 #include <linux/phy.h>
+#include <net/selftests.h>
+
 #include "smsc95xx.h"
 
 #define SMSC_CHIPNAME			"smsc95xx"
@@ -739,6 +741,26 @@ static u32 smsc95xx_get_link(struct net_device *net)
 	return net->phydev->link;
 }
 
+static void smsc95xx_ethtool_get_strings(struct net_device *netdev, u32 sset,
+					u8 *data)
+{
+	switch (sset) {
+	case ETH_SS_TEST:
+		net_selftest_get_strings(data);
+		break;
+	}
+}
+
+static int smsc95xx_ethtool_get_sset_count(struct net_device *ndev, int sset)
+{
+	switch (sset) {
+	case ETH_SS_TEST:
+		return net_selftest_get_count();
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
 static const struct ethtool_ops smsc95xx_ethtool_ops = {
 	.get_link	= smsc95xx_get_link,
 	.nway_reset	= phy_ethtool_nway_reset,
@@ -755,6 +777,9 @@ static const struct ethtool_ops smsc95xx_ethtool_ops = {
 	.get_link_ksettings	= phy_ethtool_get_link_ksettings,
 	.set_link_ksettings	= phy_ethtool_set_link_ksettings,
 	.get_ts_info	= ethtool_op_get_ts_info,
+	.self_test	= net_selftest,
+	.get_strings	= smsc95xx_ethtool_get_strings,
+	.get_sset_count	= smsc95xx_ethtool_get_sset_count,
 };
 
 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)