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, 488 insertions, 0 deletions

diff --git a/drivers/usb/serial/ir-usb.c b/drivers/usb/serial/ir-usb.c
new file mode 100644
index 000000000..82f108134
--- /dev/null
+++ b/drivers/usb/serial/ir-usb.c
@@ -0,0 +1,488 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * USB IR Dongle driver
+ *
+ *	Copyright (C) 2001-2002	Greg Kroah-Hartman (greg@kroah.com)
+ *	Copyright (C) 2002	Gary Brubaker (xavyer@ix.netcom.com)
+ *	Copyright (C) 2010	Johan Hovold (jhovold@gmail.com)
+ *
+ * This driver allows a USB IrDA device to be used as a "dumb" serial device.
+ * This can be useful if you do not have access to a full IrDA stack on the
+ * other side of the connection.  If you do have an IrDA stack on both devices,
+ * please use the usb-irda driver, as it contains the proper error checking and
+ * other goodness of a full IrDA stack.
+ *
+ * Portions of this driver were taken from drivers/net/irda/irda-usb.c, which
+ * was written by Roman Weissgaerber <weissg@vienna.at>, Dag Brattli
+ * <dag@brattli.net>, and Jean Tourrilhes <jt@hpl.hp.com>
+ *
+ * See Documentation/usb/usb-serial.rst for more information on using this
+ * driver
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/init.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>
+#include <linux/usb/irda.h>
+
+#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Johan Hovold <jhovold@gmail.com>"
+#define DRIVER_DESC "USB IR Dongle driver"
+
+/* if overridden by the user, then use their value for the size of the read and
+ * write urbs */
+static int buffer_size;
+
+/* if overridden by the user, then use the specified number of XBOFs */
+static int xbof = -1;
+
+static int  ir_startup (struct usb_serial *serial);
+static int ir_write(struct tty_struct *tty, struct usb_serial_port *port,
+		const unsigned char *buf, int count);
+static unsigned int ir_write_room(struct tty_struct *tty);
+static void ir_write_bulk_callback(struct urb *urb);
+static void ir_process_read_urb(struct urb *urb);
+static void ir_set_termios(struct tty_struct *tty,
+			   struct usb_serial_port *port,
+			   const struct ktermios *old_termios);
+
+/* Not that this lot means you can only have one per system */
+static u8 ir_baud;
+static u8 ir_xbof;
+static u8 ir_add_bof;
+
+static const struct usb_device_id ir_id_table[] = {
+	{ USB_DEVICE(0x050f, 0x0180) },		/* KC Technology, KC-180 */
+	{ USB_DEVICE(0x08e9, 0x0100) },		/* XTNDAccess */
+	{ USB_DEVICE(0x09c4, 0x0011) },		/* ACTiSys ACT-IR2000U */
+	{ USB_INTERFACE_INFO(USB_CLASS_APP_SPEC, USB_SUBCLASS_IRDA, 0) },
+	{ }					/* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, ir_id_table);
+
+static struct usb_serial_driver ir_device = {
+	.driver	= {
+		.owner	= THIS_MODULE,
+		.name	= "ir-usb",
+	},
+	.description		= "IR Dongle",
+	.id_table		= ir_id_table,
+	.num_ports		= 1,
+	.num_bulk_in		= 1,
+	.num_bulk_out		= 1,
+	.set_termios		= ir_set_termios,
+	.attach			= ir_startup,
+	.write			= ir_write,
+	.write_room		= ir_write_room,
+	.write_bulk_callback	= ir_write_bulk_callback,
+	.process_read_urb	= ir_process_read_urb,
+};
+
+static struct usb_serial_driver * const serial_drivers[] = {
+	&ir_device, NULL
+};
+
+static inline void irda_usb_dump_class_desc(struct usb_serial *serial,
+					    struct usb_irda_cs_descriptor *desc)
+{
+	struct device *dev = &serial->dev->dev;
+
+	dev_dbg(dev, "bLength=%x\n", desc->bLength);
+	dev_dbg(dev, "bDescriptorType=%x\n", desc->bDescriptorType);
+	dev_dbg(dev, "bcdSpecRevision=%x\n", __le16_to_cpu(desc->bcdSpecRevision));
+	dev_dbg(dev, "bmDataSize=%x\n", desc->bmDataSize);
+	dev_dbg(dev, "bmWindowSize=%x\n", desc->bmWindowSize);
+	dev_dbg(dev, "bmMinTurnaroundTime=%d\n", desc->bmMinTurnaroundTime);
+	dev_dbg(dev, "wBaudRate=%x\n", __le16_to_cpu(desc->wBaudRate));
+	dev_dbg(dev, "bmAdditionalBOFs=%x\n", desc->bmAdditionalBOFs);
+	dev_dbg(dev, "bIrdaRateSniff=%x\n", desc->bIrdaRateSniff);
+	dev_dbg(dev, "bMaxUnicastList=%x\n", desc->bMaxUnicastList);
+}
+
+/*------------------------------------------------------------------*/
+/*
+ * Function irda_usb_find_class_desc(dev, ifnum)
+ *
+ *    Returns instance of IrDA class descriptor, or NULL if not found
+ *
+ * The class descriptor is some extra info that IrDA USB devices will
+ * offer to us, describing their IrDA characteristics. We will use that in
+ * irda_usb_init_qos()
+ *
+ * Based on the same function in drivers/net/irda/irda-usb.c
+ */
+static struct usb_irda_cs_descriptor *
+irda_usb_find_class_desc(struct usb_serial *serial, unsigned int ifnum)
+{
+	struct usb_device *dev = serial->dev;
+	struct usb_irda_cs_descriptor *desc;
+	int ret;
+
+	desc = kzalloc(sizeof(*desc), GFP_KERNEL);
+	if (!desc)
+		return NULL;
+
+	ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+			USB_REQ_CS_IRDA_GET_CLASS_DESC,
+			USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
+			0, ifnum, desc, sizeof(*desc), 1000);
+
+	dev_dbg(&serial->dev->dev, "%s -  ret=%d\n", __func__, ret);
+	if (ret < (int)sizeof(*desc)) {
+		dev_dbg(&serial->dev->dev,
+			"%s - class descriptor read %s (%d)\n", __func__,
+			(ret < 0) ? "failed" : "too short", ret);
+		goto error;
+	}
+	if (desc->bDescriptorType != USB_DT_CS_IRDA) {
+		dev_dbg(&serial->dev->dev, "%s - bad class descriptor type\n",
+			__func__);
+		goto error;
+	}
+
+	irda_usb_dump_class_desc(serial, desc);
+	return desc;
+
+error:
+	kfree(desc);
+	return NULL;
+}
+
+static u8 ir_xbof_change(u8 xbof)
+{
+	u8 result;
+
+	/* reference irda-usb.c */
+	switch (xbof) {
+	case 48:
+		result = 0x10;
+		break;
+	case 28:
+	case 24:
+		result = 0x20;
+		break;
+	default:
+	case 12:
+		result = 0x30;
+		break;
+	case  5:
+	case  6:
+		result = 0x40;
+		break;
+	case  3:
+		result = 0x50;
+		break;
+	case  2:
+		result = 0x60;
+		break;
+	case  1:
+		result = 0x70;
+		break;
+	case  0:
+		result = 0x80;
+		break;
+	}
+
+	return(result);
+}
+
+static int ir_startup(struct usb_serial *serial)
+{
+	struct usb_irda_cs_descriptor *irda_desc;
+	int rates;
+
+	irda_desc = irda_usb_find_class_desc(serial, 0);
+	if (!irda_desc) {
+		dev_err(&serial->dev->dev,
+			"IRDA class descriptor not found, device not bound\n");
+		return -ENODEV;
+	}
+
+	rates = le16_to_cpu(irda_desc->wBaudRate);
+
+	dev_dbg(&serial->dev->dev,
+		"%s - Baud rates supported:%s%s%s%s%s%s%s%s%s\n",
+		__func__,
+		(rates & USB_IRDA_BR_2400) ? " 2400" : "",
+		(rates & USB_IRDA_BR_9600) ? " 9600" : "",
+		(rates & USB_IRDA_BR_19200) ? " 19200" : "",
+		(rates & USB_IRDA_BR_38400) ? " 38400" : "",
+		(rates & USB_IRDA_BR_57600) ? " 57600" : "",
+		(rates & USB_IRDA_BR_115200) ? " 115200" : "",
+		(rates & USB_IRDA_BR_576000) ? " 576000" : "",
+		(rates & USB_IRDA_BR_1152000) ? " 1152000" : "",
+		(rates & USB_IRDA_BR_4000000) ? " 4000000" : "");
+
+	switch (irda_desc->bmAdditionalBOFs) {
+	case USB_IRDA_AB_48:
+		ir_add_bof = 48;
+		break;
+	case USB_IRDA_AB_24:
+		ir_add_bof = 24;
+		break;
+	case USB_IRDA_AB_12:
+		ir_add_bof = 12;
+		break;
+	case USB_IRDA_AB_6:
+		ir_add_bof = 6;
+		break;
+	case USB_IRDA_AB_3:
+		ir_add_bof = 3;
+		break;
+	case USB_IRDA_AB_2:
+		ir_add_bof = 2;
+		break;
+	case USB_IRDA_AB_1:
+		ir_add_bof = 1;
+		break;
+	case USB_IRDA_AB_0:
+		ir_add_bof = 0;
+		break;
+	default:
+		break;
+	}
+
+	kfree(irda_desc);
+
+	return 0;
+}
+
+static int ir_write(struct tty_struct *tty, struct usb_serial_port *port,
+		const unsigned char *buf, int count)
+{
+	struct urb *urb = NULL;
+	unsigned long flags;
+	int ret;
+
+	if (port->bulk_out_size == 0)
+		return -EINVAL;
+
+	if (count == 0)
+		return 0;
+
+	count = min(count, port->bulk_out_size - 1);
+
+	spin_lock_irqsave(&port->lock, flags);
+	if (__test_and_clear_bit(0, &port->write_urbs_free)) {
+		urb = port->write_urbs[0];
+		port->tx_bytes += count;
+	}
+	spin_unlock_irqrestore(&port->lock, flags);
+
+	if (!urb)
+		return 0;
+
+	/*
+	 * The first byte of the packet we send to the device contains an
+	 * outbound header which indicates an additional number of BOFs and
+	 * a baud rate change.
+	 *
+	 * See section 5.4.2.2 of the USB IrDA spec.
+	 */
+	*(u8 *)urb->transfer_buffer = ir_xbof | ir_baud;
+
+	memcpy(urb->transfer_buffer + 1, buf, count);
+
+	urb->transfer_buffer_length = count + 1;
+	urb->transfer_flags = URB_ZERO_PACKET;
+
+	ret = usb_submit_urb(urb, GFP_ATOMIC);
+	if (ret) {
+		dev_err(&port->dev, "failed to submit write urb: %d\n", ret);
+
+		spin_lock_irqsave(&port->lock, flags);
+		__set_bit(0, &port->write_urbs_free);
+		port->tx_bytes -= count;
+		spin_unlock_irqrestore(&port->lock, flags);
+
+		return ret;
+	}
+
+	return count;
+}
+
+static void ir_write_bulk_callback(struct urb *urb)
+{
+	struct usb_serial_port *port = urb->context;
+	int status = urb->status;
+	unsigned long flags;
+
+	spin_lock_irqsave(&port->lock, flags);
+	__set_bit(0, &port->write_urbs_free);
+	port->tx_bytes -= urb->transfer_buffer_length - 1;
+	spin_unlock_irqrestore(&port->lock, flags);
+
+	switch (status) {
+	case 0:
+		break;
+	case -ENOENT:
+	case -ECONNRESET:
+	case -ESHUTDOWN:
+		dev_dbg(&port->dev, "write urb stopped: %d\n", status);
+		return;
+	case -EPIPE:
+		dev_err(&port->dev, "write urb stopped: %d\n", status);
+		return;
+	default:
+		dev_err(&port->dev, "nonzero write-urb status: %d\n", status);
+		break;
+	}
+
+	usb_serial_port_softint(port);
+}
+
+static unsigned int ir_write_room(struct tty_struct *tty)
+{
+	struct usb_serial_port *port = tty->driver_data;
+	unsigned int count = 0;
+
+	if (port->bulk_out_size == 0)
+		return 0;
+
+	if (test_bit(0, &port->write_urbs_free))
+		count = port->bulk_out_size - 1;
+
+	return count;
+}
+
+static void ir_process_read_urb(struct urb *urb)
+{
+	struct usb_serial_port *port = urb->context;
+	unsigned char *data = urb->transfer_buffer;
+
+	if (!urb->actual_length)
+		return;
+	/*
+	 * The first byte of the packet we get from the device
+	 * contains a busy indicator and baud rate change.
+	 * See section 5.4.1.2 of the USB IrDA spec.
+	 */
+	if (*data & 0x0f)
+		ir_baud = *data & 0x0f;
+
+	if (urb->actual_length == 1)
+		return;
+
+	tty_insert_flip_string(&port->port, data + 1, urb->actual_length - 1);
+	tty_flip_buffer_push(&port->port);
+}
+
+static void ir_set_termios(struct tty_struct *tty,
+			   struct usb_serial_port *port,
+			   const struct ktermios *old_termios)
+{
+	struct usb_device *udev = port->serial->dev;
+	unsigned char *transfer_buffer;
+	int actual_length;
+	speed_t baud;
+	int ir_baud;
+	int ret;
+
+	baud = tty_get_baud_rate(tty);
+
+	/*
+	 * FIXME, we should compare the baud request against the
+	 * capability stated in the IR header that we got in the
+	 * startup function.
+	 */
+
+	switch (baud) {
+	case 2400:
+		ir_baud = USB_IRDA_LS_2400;
+		break;
+	case 9600:
+		ir_baud = USB_IRDA_LS_9600;
+		break;
+	case 19200:
+		ir_baud = USB_IRDA_LS_19200;
+		break;
+	case 38400:
+		ir_baud = USB_IRDA_LS_38400;
+		break;
+	case 57600:
+		ir_baud = USB_IRDA_LS_57600;
+		break;
+	case 115200:
+		ir_baud = USB_IRDA_LS_115200;
+		break;
+	case 576000:
+		ir_baud = USB_IRDA_LS_576000;
+		break;
+	case 1152000:
+		ir_baud = USB_IRDA_LS_1152000;
+		break;
+	case 4000000:
+		ir_baud = USB_IRDA_LS_4000000;
+		break;
+	default:
+		ir_baud = USB_IRDA_LS_9600;
+		baud = 9600;
+	}
+
+	if (xbof == -1)
+		ir_xbof = ir_xbof_change(ir_add_bof);
+	else
+		ir_xbof = ir_xbof_change(xbof) ;
+
+	/* Only speed changes are supported */
+	tty_termios_copy_hw(&tty->termios, old_termios);
+	tty_encode_baud_rate(tty, baud, baud);
+
+	/*
+	 * send the baud change out on an "empty" data packet
+	 */
+	transfer_buffer = kmalloc(1, GFP_KERNEL);
+	if (!transfer_buffer)
+		return;
+
+	*transfer_buffer = ir_xbof | ir_baud;
+
+	ret = usb_bulk_msg(udev,
+			usb_sndbulkpipe(udev, port->bulk_out_endpointAddress),
+			transfer_buffer, 1, &actual_length, 5000);
+	if (ret || actual_length != 1) {
+		if (!ret)
+			ret = -EIO;
+		dev_err(&port->dev, "failed to change line speed: %d\n", ret);
+	}
+
+	kfree(transfer_buffer);
+}
+
+static int __init ir_init(void)
+{
+	if (buffer_size) {
+		ir_device.bulk_in_size = buffer_size;
+		ir_device.bulk_out_size = buffer_size;
+	}
+
+	return usb_serial_register_drivers(serial_drivers, KBUILD_MODNAME, ir_id_table);
+}
+
+static void __exit ir_exit(void)
+{
+	usb_serial_deregister_drivers(serial_drivers);
+}
+
+
+module_init(ir_init);
+module_exit(ir_exit);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+
+module_param(xbof, int, 0);
+MODULE_PARM_DESC(xbof, "Force specific number of XBOFs");
+module_param(buffer_size, int, 0);
+MODULE_PARM_DESC(buffer_size, "Size of the transfer buffers");
+