From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 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(). ... --- drivers/usb/misc/lvstest.c | 476 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 476 insertions(+) create mode 100644 drivers/usb/misc/lvstest.c (limited to 'drivers/usb/misc/lvstest.c') diff --git a/drivers/usb/misc/lvstest.c b/drivers/usb/misc/lvstest.c new file mode 100644 index 000000000..25ec5666a --- /dev/null +++ b/drivers/usb/misc/lvstest.c @@ -0,0 +1,476 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * drivers/usb/misc/lvstest.c + * + * Test pattern generation for Link Layer Validation System Tests + * + * Copyright (C) 2014 ST Microelectronics + * Pratyush Anand + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct lvs_rh { + /* root hub interface */ + struct usb_interface *intf; + /* if lvs device connected */ + bool present; + /* port no at which lvs device is present */ + int portnum; + /* urb buffer */ + u8 buffer[8]; + /* class descriptor */ + struct usb_hub_descriptor descriptor; + /* urb for polling interrupt pipe */ + struct urb *urb; + /* LVH RH work */ + struct work_struct rh_work; + /* RH port status */ + struct usb_port_status port_status; +}; + +static struct usb_device *create_lvs_device(struct usb_interface *intf) +{ + struct usb_device *udev, *hdev; + struct usb_hcd *hcd; + struct lvs_rh *lvs = usb_get_intfdata(intf); + + if (!lvs->present) { + dev_err(&intf->dev, "No LVS device is present\n"); + return NULL; + } + + hdev = interface_to_usbdev(intf); + hcd = bus_to_hcd(hdev->bus); + + udev = usb_alloc_dev(hdev, hdev->bus, lvs->portnum); + if (!udev) { + dev_err(&intf->dev, "Could not allocate lvs udev\n"); + return NULL; + } + udev->speed = USB_SPEED_SUPER; + udev->ep0.desc.wMaxPacketSize = cpu_to_le16(512); + usb_set_device_state(udev, USB_STATE_DEFAULT); + + if (hcd->driver->enable_device) { + if (hcd->driver->enable_device(hcd, udev) < 0) { + dev_err(&intf->dev, "Failed to enable\n"); + usb_put_dev(udev); + return NULL; + } + } + + return udev; +} + +static void destroy_lvs_device(struct usb_device *udev) +{ + struct usb_device *hdev = udev->parent; + struct usb_hcd *hcd = bus_to_hcd(hdev->bus); + + if (hcd->driver->free_dev) + hcd->driver->free_dev(hcd, udev); + + usb_put_dev(udev); +} + +static int lvs_rh_clear_port_feature(struct usb_device *hdev, + int port1, int feature) +{ + return usb_control_msg(hdev, usb_sndctrlpipe(hdev, 0), + USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature, port1, + NULL, 0, 1000); +} + +static int lvs_rh_set_port_feature(struct usb_device *hdev, + int port1, int feature) +{ + return usb_control_msg(hdev, usb_sndctrlpipe(hdev, 0), + USB_REQ_SET_FEATURE, USB_RT_PORT, feature, port1, + NULL, 0, 1000); +} + +static ssize_t u3_entry_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct usb_interface *intf = to_usb_interface(dev); + struct usb_device *hdev = interface_to_usbdev(intf); + struct lvs_rh *lvs = usb_get_intfdata(intf); + struct usb_device *udev; + int ret; + + udev = create_lvs_device(intf); + if (!udev) { + dev_err(dev, "failed to create lvs device\n"); + return -ENOMEM; + } + + ret = lvs_rh_set_port_feature(hdev, lvs->portnum, + USB_PORT_FEAT_SUSPEND); + if (ret < 0) + dev_err(dev, "can't issue U3 entry %d\n", ret); + + destroy_lvs_device(udev); + + if (ret < 0) + return ret; + + return count; +} +static DEVICE_ATTR_WO(u3_entry); + +static ssize_t u3_exit_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct usb_interface *intf = to_usb_interface(dev); + struct usb_device *hdev = interface_to_usbdev(intf); + struct lvs_rh *lvs = usb_get_intfdata(intf); + struct usb_device *udev; + int ret; + + udev = create_lvs_device(intf); + if (!udev) { + dev_err(dev, "failed to create lvs device\n"); + return -ENOMEM; + } + + ret = lvs_rh_clear_port_feature(hdev, lvs->portnum, + USB_PORT_FEAT_SUSPEND); + if (ret < 0) + dev_err(dev, "can't issue U3 exit %d\n", ret); + + destroy_lvs_device(udev); + + if (ret < 0) + return ret; + + return count; +} +static DEVICE_ATTR_WO(u3_exit); + +static ssize_t hot_reset_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct usb_interface *intf = to_usb_interface(dev); + struct usb_device *hdev = interface_to_usbdev(intf); + struct lvs_rh *lvs = usb_get_intfdata(intf); + int ret; + + ret = lvs_rh_set_port_feature(hdev, lvs->portnum, + USB_PORT_FEAT_RESET); + if (ret < 0) { + dev_err(dev, "can't issue hot reset %d\n", ret); + return ret; + } + + return count; +} +static DEVICE_ATTR_WO(hot_reset); + +static ssize_t warm_reset_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct usb_interface *intf = to_usb_interface(dev); + struct usb_device *hdev = interface_to_usbdev(intf); + struct lvs_rh *lvs = usb_get_intfdata(intf); + int ret; + + ret = lvs_rh_set_port_feature(hdev, lvs->portnum, + USB_PORT_FEAT_BH_PORT_RESET); + if (ret < 0) { + dev_err(dev, "can't issue warm reset %d\n", ret); + return ret; + } + + return count; +} +static DEVICE_ATTR_WO(warm_reset); + +static ssize_t u2_timeout_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct usb_interface *intf = to_usb_interface(dev); + struct usb_device *hdev = interface_to_usbdev(intf); + struct lvs_rh *lvs = usb_get_intfdata(intf); + unsigned long val; + int ret; + + ret = kstrtoul(buf, 10, &val); + if (ret < 0) { + dev_err(dev, "couldn't parse string %d\n", ret); + return ret; + } + + if (val > 127) + return -EINVAL; + + ret = lvs_rh_set_port_feature(hdev, lvs->portnum | (val << 8), + USB_PORT_FEAT_U2_TIMEOUT); + if (ret < 0) { + dev_err(dev, "Error %d while setting U2 timeout %ld\n", ret, val); + return ret; + } + + return count; +} +static DEVICE_ATTR_WO(u2_timeout); + +static ssize_t u1_timeout_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct usb_interface *intf = to_usb_interface(dev); + struct usb_device *hdev = interface_to_usbdev(intf); + struct lvs_rh *lvs = usb_get_intfdata(intf); + unsigned long val; + int ret; + + ret = kstrtoul(buf, 10, &val); + if (ret < 0) { + dev_err(dev, "couldn't parse string %d\n", ret); + return ret; + } + + if (val > 127) + return -EINVAL; + + ret = lvs_rh_set_port_feature(hdev, lvs->portnum | (val << 8), + USB_PORT_FEAT_U1_TIMEOUT); + if (ret < 0) { + dev_err(dev, "Error %d while setting U1 timeout %ld\n", ret, val); + return ret; + } + + return count; +} +static DEVICE_ATTR_WO(u1_timeout); + +static ssize_t get_dev_desc_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct usb_interface *intf = to_usb_interface(dev); + struct usb_device *udev; + struct usb_device_descriptor *descriptor; + int ret; + + descriptor = kmalloc(sizeof(*descriptor), GFP_KERNEL); + if (!descriptor) + return -ENOMEM; + + udev = create_lvs_device(intf); + if (!udev) { + dev_err(dev, "failed to create lvs device\n"); + ret = -ENOMEM; + goto free_desc; + } + + ret = usb_control_msg(udev, (PIPE_CONTROL << 30) | USB_DIR_IN, + USB_REQ_GET_DESCRIPTOR, USB_DIR_IN, USB_DT_DEVICE << 8, + 0, descriptor, sizeof(*descriptor), + USB_CTRL_GET_TIMEOUT); + if (ret < 0) + dev_err(dev, "can't read device descriptor %d\n", ret); + + destroy_lvs_device(udev); + +free_desc: + kfree(descriptor); + + if (ret < 0) + return ret; + + return count; +} +static DEVICE_ATTR_WO(get_dev_desc); + +static ssize_t enable_compliance_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct usb_interface *intf = to_usb_interface(dev); + struct usb_device *hdev = interface_to_usbdev(intf); + struct lvs_rh *lvs = usb_get_intfdata(intf); + int ret; + + ret = lvs_rh_set_port_feature(hdev, + lvs->portnum | USB_SS_PORT_LS_COMP_MOD << 3, + USB_PORT_FEAT_LINK_STATE); + if (ret < 0) { + dev_err(dev, "can't enable compliance mode %d\n", ret); + return ret; + } + + return count; +} +static DEVICE_ATTR_WO(enable_compliance); + +static struct attribute *lvs_attrs[] = { + &dev_attr_get_dev_desc.attr, + &dev_attr_u1_timeout.attr, + &dev_attr_u2_timeout.attr, + &dev_attr_hot_reset.attr, + &dev_attr_warm_reset.attr, + &dev_attr_u3_entry.attr, + &dev_attr_u3_exit.attr, + &dev_attr_enable_compliance.attr, + NULL +}; +ATTRIBUTE_GROUPS(lvs); + +static void lvs_rh_work(struct work_struct *work) +{ + struct lvs_rh *lvs = container_of(work, struct lvs_rh, rh_work); + struct usb_interface *intf = lvs->intf; + struct usb_device *hdev = interface_to_usbdev(intf); + struct usb_hcd *hcd = bus_to_hcd(hdev->bus); + struct usb_hub_descriptor *descriptor = &lvs->descriptor; + struct usb_port_status *port_status = &lvs->port_status; + int i, ret = 0; + u16 portchange; + + /* Examine each root port */ + for (i = 1; i <= descriptor->bNbrPorts; i++) { + ret = usb_control_msg(hdev, usb_rcvctrlpipe(hdev, 0), + USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, i, + port_status, sizeof(*port_status), 1000); + if (ret < 4) + continue; + + portchange = le16_to_cpu(port_status->wPortChange); + + if (portchange & USB_PORT_STAT_C_LINK_STATE) + lvs_rh_clear_port_feature(hdev, i, + USB_PORT_FEAT_C_PORT_LINK_STATE); + if (portchange & USB_PORT_STAT_C_ENABLE) + lvs_rh_clear_port_feature(hdev, i, + USB_PORT_FEAT_C_ENABLE); + if (portchange & USB_PORT_STAT_C_RESET) + lvs_rh_clear_port_feature(hdev, i, + USB_PORT_FEAT_C_RESET); + if (portchange & USB_PORT_STAT_C_BH_RESET) + lvs_rh_clear_port_feature(hdev, i, + USB_PORT_FEAT_C_BH_PORT_RESET); + if (portchange & USB_PORT_STAT_C_CONNECTION) { + lvs_rh_clear_port_feature(hdev, i, + USB_PORT_FEAT_C_CONNECTION); + + if (le16_to_cpu(port_status->wPortStatus) & + USB_PORT_STAT_CONNECTION) { + lvs->present = true; + lvs->portnum = i; + if (hcd->usb_phy) + usb_phy_notify_connect(hcd->usb_phy, + USB_SPEED_SUPER); + } else { + lvs->present = false; + if (hcd->usb_phy) + usb_phy_notify_disconnect(hcd->usb_phy, + USB_SPEED_SUPER); + } + break; + } + } + + ret = usb_submit_urb(lvs->urb, GFP_KERNEL); + if (ret != 0 && ret != -ENODEV && ret != -EPERM) + dev_err(&intf->dev, "urb resubmit error %d\n", ret); +} + +static void lvs_rh_irq(struct urb *urb) +{ + struct lvs_rh *lvs = urb->context; + + schedule_work(&lvs->rh_work); +} + +static int lvs_rh_probe(struct usb_interface *intf, + const struct usb_device_id *id) +{ + struct usb_device *hdev; + struct usb_host_interface *desc; + struct usb_endpoint_descriptor *endpoint; + struct lvs_rh *lvs; + unsigned int pipe; + int ret, maxp; + + hdev = interface_to_usbdev(intf); + desc = intf->cur_altsetting; + + ret = usb_find_int_in_endpoint(desc, &endpoint); + if (ret) + return ret; + + /* valid only for SS root hub */ + if (hdev->descriptor.bDeviceProtocol != USB_HUB_PR_SS || hdev->parent) { + dev_err(&intf->dev, "Bind LVS driver with SS root Hub only\n"); + return -EINVAL; + } + + lvs = devm_kzalloc(&intf->dev, sizeof(*lvs), GFP_KERNEL); + if (!lvs) + return -ENOMEM; + + lvs->intf = intf; + usb_set_intfdata(intf, lvs); + + /* how many number of ports this root hub has */ + ret = usb_control_msg(hdev, usb_rcvctrlpipe(hdev, 0), + USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB, + USB_DT_SS_HUB << 8, 0, &lvs->descriptor, + USB_DT_SS_HUB_SIZE, USB_CTRL_GET_TIMEOUT); + if (ret < (USB_DT_HUB_NONVAR_SIZE + 2)) { + dev_err(&hdev->dev, "wrong root hub descriptor read %d\n", ret); + return ret < 0 ? ret : -EINVAL; + } + + /* submit urb to poll interrupt endpoint */ + lvs->urb = usb_alloc_urb(0, GFP_KERNEL); + if (!lvs->urb) + return -ENOMEM; + + INIT_WORK(&lvs->rh_work, lvs_rh_work); + + pipe = usb_rcvintpipe(hdev, endpoint->bEndpointAddress); + maxp = usb_maxpacket(hdev, pipe); + usb_fill_int_urb(lvs->urb, hdev, pipe, &lvs->buffer[0], maxp, + lvs_rh_irq, lvs, endpoint->bInterval); + + ret = usb_submit_urb(lvs->urb, GFP_KERNEL); + if (ret < 0) { + dev_err(&intf->dev, "couldn't submit lvs urb %d\n", ret); + goto free_urb; + } + + return ret; + +free_urb: + usb_free_urb(lvs->urb); + return ret; +} + +static void lvs_rh_disconnect(struct usb_interface *intf) +{ + struct lvs_rh *lvs = usb_get_intfdata(intf); + + usb_poison_urb(lvs->urb); /* used in scheduled work */ + flush_work(&lvs->rh_work); + usb_free_urb(lvs->urb); +} + +static struct usb_driver lvs_driver = { + .name = "lvs", + .probe = lvs_rh_probe, + .disconnect = lvs_rh_disconnect, + .dev_groups = lvs_groups, +}; + +module_usb_driver(lvs_driver); + +MODULE_DESCRIPTION("Link Layer Validation System Driver"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3