Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 423 insertions, 0 deletions

diff --git a/drivers/usb/serial/cyberjack.c b/drivers/usb/serial/cyberjack.c
new file mode 100644
index 000000000..51e5aac3b
--- /dev/null
+++ b/drivers/usb/serial/cyberjack.c
@@ -0,0 +1,423 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ *  REINER SCT cyberJack pinpad/e-com USB Chipcard Reader Driver
+ *
+ *  Copyright (C) 2001  REINER SCT
+ *  Author: Matthias Bruestle
+ *
+ *  Contact: support@reiner-sct.com (see MAINTAINERS)
+ *
+ *  This program is largely derived from work by the linux-usb group
+ *  and associated source files.  Please see the usb/serial files for
+ *  individual credits and copyrights.
+ *
+ *  Thanks to Greg Kroah-Hartman (greg@kroah.com) for his help and
+ *  patience.
+ *
+ *  In case of problems, please write to the contact e-mail address
+ *  mentioned above.
+ *
+ *  Please note that later models of the cyberjack reader family are
+ *  supported by a libusb-based userspace device driver.
+ *
+ *  Homepage: http://www.reiner-sct.de/support/treiber_cyberjack.php#linux
+ */
+
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/tty.h>
+#include <linux/tty_driver.h>
+#include <linux/tty_flip.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/uaccess.h>
+#include <linux/usb.h>
+#include <linux/usb/serial.h>
+
+#define CYBERJACK_LOCAL_BUF_SIZE 32
+
+#define DRIVER_AUTHOR "Matthias Bruestle"
+#define DRIVER_DESC "REINER SCT cyberJack pinpad/e-com USB Chipcard Reader Driver"
+
+
+#define CYBERJACK_VENDOR_ID	0x0C4B
+#define CYBERJACK_PRODUCT_ID	0x0100
+
+/* Function prototypes */
+static int cyberjack_port_probe(struct usb_serial_port *port);
+static void cyberjack_port_remove(struct usb_serial_port *port);
+static int  cyberjack_open(struct tty_struct *tty,
+	struct usb_serial_port *port);
+static void cyberjack_close(struct usb_serial_port *port);
+static int cyberjack_write(struct tty_struct *tty,
+	struct usb_serial_port *port, const unsigned char *buf, int count);
+static unsigned int cyberjack_write_room(struct tty_struct *tty);
+static void cyberjack_read_int_callback(struct urb *urb);
+static void cyberjack_read_bulk_callback(struct urb *urb);
+static void cyberjack_write_bulk_callback(struct urb *urb);
+
+static const struct usb_device_id id_table[] = {
+	{ USB_DEVICE(CYBERJACK_VENDOR_ID, CYBERJACK_PRODUCT_ID) },
+	{ }			/* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, id_table);
+
+static struct usb_serial_driver cyberjack_device = {
+	.driver = {
+		.owner =	THIS_MODULE,
+		.name =		"cyberjack",
+	},
+	.description =		"Reiner SCT Cyberjack USB card reader",
+	.id_table =		id_table,
+	.num_ports =		1,
+	.num_bulk_out =		1,
+	.port_probe =		cyberjack_port_probe,
+	.port_remove =		cyberjack_port_remove,
+	.open =			cyberjack_open,
+	.close =		cyberjack_close,
+	.write =		cyberjack_write,
+	.write_room =		cyberjack_write_room,
+	.read_int_callback =	cyberjack_read_int_callback,
+	.read_bulk_callback =	cyberjack_read_bulk_callback,
+	.write_bulk_callback =	cyberjack_write_bulk_callback,
+};
+
+static struct usb_serial_driver * const serial_drivers[] = {
+	&cyberjack_device, NULL
+};
+
+struct cyberjack_private {
+	spinlock_t	lock;		/* Lock for SMP */
+	short		rdtodo;		/* Bytes still to read */
+	unsigned char	wrbuf[5*64];	/* Buffer for collecting data to write */
+	short		wrfilled;	/* Overall data size we already got */
+	short		wrsent;		/* Data already sent */
+};
+
+static int cyberjack_port_probe(struct usb_serial_port *port)
+{
+	struct cyberjack_private *priv;
+	int result;
+
+	priv = kmalloc(sizeof(struct cyberjack_private), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	spin_lock_init(&priv->lock);
+	priv->rdtodo = 0;
+	priv->wrfilled = 0;
+	priv->wrsent = 0;
+
+	usb_set_serial_port_data(port, priv);
+
+	result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
+	if (result)
+		dev_err(&port->dev, "usb_submit_urb(read int) failed\n");
+
+	return 0;
+}
+
+static void cyberjack_port_remove(struct usb_serial_port *port)
+{
+	struct cyberjack_private *priv;
+
+	usb_kill_urb(port->interrupt_in_urb);
+
+	priv = usb_get_serial_port_data(port);
+	kfree(priv);
+}
+
+static int  cyberjack_open(struct tty_struct *tty,
+					struct usb_serial_port *port)
+{
+	struct cyberjack_private *priv;
+	unsigned long flags;
+
+	dev_dbg(&port->dev, "%s - usb_clear_halt\n", __func__);
+	usb_clear_halt(port->serial->dev, port->write_urb->pipe);
+
+	priv = usb_get_serial_port_data(port);
+	spin_lock_irqsave(&priv->lock, flags);
+	priv->rdtodo = 0;
+	priv->wrfilled = 0;
+	priv->wrsent = 0;
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	return 0;
+}
+
+static void cyberjack_close(struct usb_serial_port *port)
+{
+	usb_kill_urb(port->write_urb);
+	usb_kill_urb(port->read_urb);
+}
+
+static int cyberjack_write(struct tty_struct *tty,
+	struct usb_serial_port *port, const unsigned char *buf, int count)
+{
+	struct device *dev = &port->dev;
+	struct cyberjack_private *priv = usb_get_serial_port_data(port);
+	unsigned long flags;
+	int result;
+	int wrexpected;
+
+	if (count == 0) {
+		dev_dbg(dev, "%s - write request of 0 bytes\n", __func__);
+		return 0;
+	}
+
+	if (!test_and_clear_bit(0, &port->write_urbs_free)) {
+		dev_dbg(dev, "%s - already writing\n", __func__);
+		return 0;
+	}
+
+	spin_lock_irqsave(&priv->lock, flags);
+
+	if (count+priv->wrfilled > sizeof(priv->wrbuf)) {
+		/* To much data for buffer. Reset buffer. */
+		priv->wrfilled = 0;
+		spin_unlock_irqrestore(&priv->lock, flags);
+		set_bit(0, &port->write_urbs_free);
+		return 0;
+	}
+
+	/* Copy data */
+	memcpy(priv->wrbuf + priv->wrfilled, buf, count);
+
+	usb_serial_debug_data(dev, __func__, count, priv->wrbuf + priv->wrfilled);
+	priv->wrfilled += count;
+
+	if (priv->wrfilled >= 3) {
+		wrexpected = ((int)priv->wrbuf[2]<<8)+priv->wrbuf[1]+3;
+		dev_dbg(dev, "%s - expected data: %d\n", __func__, wrexpected);
+	} else
+		wrexpected = sizeof(priv->wrbuf);
+
+	if (priv->wrfilled >= wrexpected) {
+		/* We have enough data to begin transmission */
+		int length;
+
+		dev_dbg(dev, "%s - transmitting data (frame 1)\n", __func__);
+		length = (wrexpected > port->bulk_out_size) ?
+					port->bulk_out_size : wrexpected;
+
+		memcpy(port->write_urb->transfer_buffer, priv->wrbuf, length);
+		priv->wrsent = length;
+
+		/* set up our urb */
+		port->write_urb->transfer_buffer_length = length;
+
+		/* send the data out the bulk port */
+		result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
+		if (result) {
+			dev_err(&port->dev,
+				"%s - failed submitting write urb, error %d\n",
+				__func__, result);
+			/* Throw away data. No better idea what to do with it. */
+			priv->wrfilled = 0;
+			priv->wrsent = 0;
+			spin_unlock_irqrestore(&priv->lock, flags);
+			set_bit(0, &port->write_urbs_free);
+			return 0;
+		}
+
+		dev_dbg(dev, "%s - priv->wrsent=%d\n", __func__, priv->wrsent);
+		dev_dbg(dev, "%s - priv->wrfilled=%d\n", __func__, priv->wrfilled);
+
+		if (priv->wrsent >= priv->wrfilled) {
+			dev_dbg(dev, "%s - buffer cleaned\n", __func__);
+			memset(priv->wrbuf, 0, sizeof(priv->wrbuf));
+			priv->wrfilled = 0;
+			priv->wrsent = 0;
+		}
+	}
+
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	return count;
+}
+
+static unsigned int cyberjack_write_room(struct tty_struct *tty)
+{
+	/* FIXME: .... */
+	return CYBERJACK_LOCAL_BUF_SIZE;
+}
+
+static void cyberjack_read_int_callback(struct urb *urb)
+{
+	struct usb_serial_port *port = urb->context;
+	struct cyberjack_private *priv = usb_get_serial_port_data(port);
+	struct device *dev = &port->dev;
+	unsigned char *data = urb->transfer_buffer;
+	int status = urb->status;
+	unsigned long flags;
+	int result;
+
+	/* the urb might have been killed. */
+	if (status)
+		return;
+
+	usb_serial_debug_data(dev, __func__, urb->actual_length, data);
+
+	/* React only to interrupts signaling a bulk_in transfer */
+	if (urb->actual_length == 4 && data[0] == 0x01) {
+		short old_rdtodo;
+
+		/* This is a announcement of coming bulk_ins. */
+		unsigned short size = ((unsigned short)data[3]<<8)+data[2]+3;
+
+		spin_lock_irqsave(&priv->lock, flags);
+
+		old_rdtodo = priv->rdtodo;
+
+		if (old_rdtodo > SHRT_MAX - size) {
+			dev_dbg(dev, "Too many bulk_in urbs to do.\n");
+			spin_unlock_irqrestore(&priv->lock, flags);
+			goto resubmit;
+		}
+
+		/* "+=" is probably more fault tolerant than "=" */
+		priv->rdtodo += size;
+
+		dev_dbg(dev, "%s - rdtodo: %d\n", __func__, priv->rdtodo);
+
+		spin_unlock_irqrestore(&priv->lock, flags);
+
+		if (!old_rdtodo) {
+			result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
+			if (result)
+				dev_err(dev, "%s - failed resubmitting read urb, error %d\n",
+					__func__, result);
+			dev_dbg(dev, "%s - usb_submit_urb(read urb)\n", __func__);
+		}
+	}
+
+resubmit:
+	result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
+	if (result)
+		dev_err(&port->dev, "usb_submit_urb(read int) failed\n");
+	dev_dbg(dev, "%s - usb_submit_urb(int urb)\n", __func__);
+}
+
+static void cyberjack_read_bulk_callback(struct urb *urb)
+{
+	struct usb_serial_port *port = urb->context;
+	struct cyberjack_private *priv = usb_get_serial_port_data(port);
+	struct device *dev = &port->dev;
+	unsigned char *data = urb->transfer_buffer;
+	unsigned long flags;
+	short todo;
+	int result;
+	int status = urb->status;
+
+	usb_serial_debug_data(dev, __func__, urb->actual_length, data);
+	if (status) {
+		dev_dbg(dev, "%s - nonzero read bulk status received: %d\n",
+			__func__, status);
+		return;
+	}
+
+	if (urb->actual_length) {
+		tty_insert_flip_string(&port->port, data, urb->actual_length);
+		tty_flip_buffer_push(&port->port);
+	}
+
+	spin_lock_irqsave(&priv->lock, flags);
+
+	/* Reduce urbs to do by one. */
+	priv->rdtodo -= urb->actual_length;
+	/* Just to be sure */
+	if (priv->rdtodo < 0)
+		priv->rdtodo = 0;
+	todo = priv->rdtodo;
+
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	dev_dbg(dev, "%s - rdtodo: %d\n", __func__, todo);
+
+	/* Continue to read if we have still urbs to do. */
+	if (todo /* || (urb->actual_length==port->bulk_in_endpointAddress)*/) {
+		result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
+		if (result)
+			dev_err(dev, "%s - failed resubmitting read urb, error %d\n",
+				__func__, result);
+		dev_dbg(dev, "%s - usb_submit_urb(read urb)\n", __func__);
+	}
+}
+
+static void cyberjack_write_bulk_callback(struct urb *urb)
+{
+	struct usb_serial_port *port = urb->context;
+	struct cyberjack_private *priv = usb_get_serial_port_data(port);
+	struct device *dev = &port->dev;
+	int status = urb->status;
+	unsigned long flags;
+	bool resubmitted = false;
+
+	if (status) {
+		dev_dbg(dev, "%s - nonzero write bulk status received: %d\n",
+			__func__, status);
+		set_bit(0, &port->write_urbs_free);
+		return;
+	}
+
+	spin_lock_irqsave(&priv->lock, flags);
+
+	/* only do something if we have more data to send */
+	if (priv->wrfilled) {
+		int length, blksize, result;
+
+		dev_dbg(dev, "%s - transmitting data (frame n)\n", __func__);
+
+		length = ((priv->wrfilled - priv->wrsent) > port->bulk_out_size) ?
+			port->bulk_out_size : (priv->wrfilled - priv->wrsent);
+
+		memcpy(port->write_urb->transfer_buffer,
+					priv->wrbuf + priv->wrsent, length);
+		priv->wrsent += length;
+
+		/* set up our urb */
+		port->write_urb->transfer_buffer_length = length;
+
+		/* send the data out the bulk port */
+		result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
+		if (result) {
+			dev_err(dev, "%s - failed submitting write urb, error %d\n",
+				__func__, result);
+			/* Throw away data. No better idea what to do with it. */
+			priv->wrfilled = 0;
+			priv->wrsent = 0;
+			goto exit;
+		}
+
+		resubmitted = true;
+
+		dev_dbg(dev, "%s - priv->wrsent=%d\n", __func__, priv->wrsent);
+		dev_dbg(dev, "%s - priv->wrfilled=%d\n", __func__, priv->wrfilled);
+
+		blksize = ((int)priv->wrbuf[2]<<8)+priv->wrbuf[1]+3;
+
+		if (priv->wrsent >= priv->wrfilled ||
+					priv->wrsent >= blksize) {
+			dev_dbg(dev, "%s - buffer cleaned\n", __func__);
+			memset(priv->wrbuf, 0, sizeof(priv->wrbuf));
+			priv->wrfilled = 0;
+			priv->wrsent = 0;
+		}
+	}
+
+exit:
+	spin_unlock_irqrestore(&priv->lock, flags);
+	if (!resubmitted)
+		set_bit(0, &port->write_urbs_free);
+	usb_serial_port_softint(port);
+}
+
+module_usb_serial_driver(serial_drivers, id_table);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");