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/cdns3/cdnsp-ep0.c | 489 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 489 insertions(+) create mode 100644 drivers/usb/cdns3/cdnsp-ep0.c (limited to 'drivers/usb/cdns3/cdnsp-ep0.c') diff --git a/drivers/usb/cdns3/cdnsp-ep0.c b/drivers/usb/cdns3/cdnsp-ep0.c new file mode 100644 index 000000000..9b8325f82 --- /dev/null +++ b/drivers/usb/cdns3/cdnsp-ep0.c @@ -0,0 +1,489 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Cadence CDNSP DRD Driver. + * + * Copyright (C) 2020 Cadence. + * + * Author: Pawel Laszczak + * + */ + +#include +#include +#include + +#include "cdnsp-gadget.h" +#include "cdnsp-trace.h" + +static void cdnsp_ep0_stall(struct cdnsp_device *pdev) +{ + struct cdnsp_request *preq; + struct cdnsp_ep *pep; + + pep = &pdev->eps[0]; + preq = next_request(&pep->pending_list); + + if (pdev->three_stage_setup) { + cdnsp_halt_endpoint(pdev, pep, true); + + if (preq) + cdnsp_gadget_giveback(pep, preq, -ECONNRESET); + } else { + pep->ep_state |= EP0_HALTED_STATUS; + + if (preq) + list_del(&preq->list); + + cdnsp_status_stage(pdev); + } +} + +static int cdnsp_ep0_delegate_req(struct cdnsp_device *pdev, + struct usb_ctrlrequest *ctrl) +{ + int ret; + + spin_unlock(&pdev->lock); + ret = pdev->gadget_driver->setup(&pdev->gadget, ctrl); + spin_lock(&pdev->lock); + + return ret; +} + +static int cdnsp_ep0_set_config(struct cdnsp_device *pdev, + struct usb_ctrlrequest *ctrl) +{ + enum usb_device_state state = pdev->gadget.state; + u32 cfg; + int ret; + + cfg = le16_to_cpu(ctrl->wValue); + + switch (state) { + case USB_STATE_ADDRESS: + trace_cdnsp_ep0_set_config("from Address state"); + break; + case USB_STATE_CONFIGURED: + trace_cdnsp_ep0_set_config("from Configured state"); + break; + default: + dev_err(pdev->dev, "Set Configuration - bad device state\n"); + return -EINVAL; + } + + ret = cdnsp_ep0_delegate_req(pdev, ctrl); + if (ret) + return ret; + + if (!cfg) + usb_gadget_set_state(&pdev->gadget, USB_STATE_ADDRESS); + + return 0; +} + +static int cdnsp_ep0_set_address(struct cdnsp_device *pdev, + struct usb_ctrlrequest *ctrl) +{ + enum usb_device_state state = pdev->gadget.state; + struct cdnsp_slot_ctx *slot_ctx; + unsigned int slot_state; + int ret; + u32 addr; + + addr = le16_to_cpu(ctrl->wValue); + + if (addr > 127) { + dev_err(pdev->dev, "Invalid device address %d\n", addr); + return -EINVAL; + } + + slot_ctx = cdnsp_get_slot_ctx(&pdev->out_ctx); + + if (state == USB_STATE_CONFIGURED) { + dev_err(pdev->dev, "Can't Set Address from Configured State\n"); + return -EINVAL; + } + + pdev->device_address = le16_to_cpu(ctrl->wValue); + + slot_ctx = cdnsp_get_slot_ctx(&pdev->out_ctx); + slot_state = GET_SLOT_STATE(le32_to_cpu(slot_ctx->dev_state)); + if (slot_state == SLOT_STATE_ADDRESSED) + cdnsp_reset_device(pdev); + + /*set device address*/ + ret = cdnsp_setup_device(pdev, SETUP_CONTEXT_ADDRESS); + if (ret) + return ret; + + if (addr) + usb_gadget_set_state(&pdev->gadget, USB_STATE_ADDRESS); + else + usb_gadget_set_state(&pdev->gadget, USB_STATE_DEFAULT); + + return 0; +} + +int cdnsp_status_stage(struct cdnsp_device *pdev) +{ + pdev->ep0_stage = CDNSP_STATUS_STAGE; + pdev->ep0_preq.request.length = 0; + + return cdnsp_ep_enqueue(pdev->ep0_preq.pep, &pdev->ep0_preq); +} + +static int cdnsp_w_index_to_ep_index(u16 wIndex) +{ + if (!(wIndex & USB_ENDPOINT_NUMBER_MASK)) + return 0; + + return ((wIndex & USB_ENDPOINT_NUMBER_MASK) * 2) + + (wIndex & USB_ENDPOINT_DIR_MASK ? 1 : 0) - 1; +} + +static int cdnsp_ep0_handle_status(struct cdnsp_device *pdev, + struct usb_ctrlrequest *ctrl) +{ + struct cdnsp_ep *pep; + __le16 *response; + int ep_sts = 0; + u16 status = 0; + u32 recipient; + + recipient = ctrl->bRequestType & USB_RECIP_MASK; + + switch (recipient) { + case USB_RECIP_DEVICE: + status = pdev->gadget.is_selfpowered; + status |= pdev->may_wakeup << USB_DEVICE_REMOTE_WAKEUP; + + if (pdev->gadget.speed >= USB_SPEED_SUPER) { + status |= pdev->u1_allowed << USB_DEV_STAT_U1_ENABLED; + status |= pdev->u2_allowed << USB_DEV_STAT_U2_ENABLED; + } + break; + case USB_RECIP_INTERFACE: + /* + * Function Remote Wake Capable D0 + * Function Remote Wakeup D1 + */ + return cdnsp_ep0_delegate_req(pdev, ctrl); + case USB_RECIP_ENDPOINT: + ep_sts = cdnsp_w_index_to_ep_index(le16_to_cpu(ctrl->wIndex)); + pep = &pdev->eps[ep_sts]; + ep_sts = GET_EP_CTX_STATE(pep->out_ctx); + + /* check if endpoint is stalled */ + if (ep_sts == EP_STATE_HALTED) + status = BIT(USB_ENDPOINT_HALT); + break; + default: + return -EINVAL; + } + + response = (__le16 *)pdev->setup_buf; + *response = cpu_to_le16(status); + + pdev->ep0_preq.request.length = sizeof(*response); + pdev->ep0_preq.request.buf = pdev->setup_buf; + + return cdnsp_ep_enqueue(pdev->ep0_preq.pep, &pdev->ep0_preq); +} + +static void cdnsp_enter_test_mode(struct cdnsp_device *pdev) +{ + u32 temp; + + temp = readl(&pdev->active_port->regs->portpmsc) & ~GENMASK(31, 28); + temp |= PORT_TEST_MODE(pdev->test_mode); + writel(temp, &pdev->active_port->regs->portpmsc); +} + +static int cdnsp_ep0_handle_feature_device(struct cdnsp_device *pdev, + struct usb_ctrlrequest *ctrl, + int set) +{ + enum usb_device_state state; + enum usb_device_speed speed; + u16 tmode; + + state = pdev->gadget.state; + speed = pdev->gadget.speed; + + switch (le16_to_cpu(ctrl->wValue)) { + case USB_DEVICE_REMOTE_WAKEUP: + pdev->may_wakeup = !!set; + trace_cdnsp_may_wakeup(set); + break; + case USB_DEVICE_U1_ENABLE: + if (state != USB_STATE_CONFIGURED || speed < USB_SPEED_SUPER) + return -EINVAL; + + pdev->u1_allowed = !!set; + trace_cdnsp_u1(set); + break; + case USB_DEVICE_U2_ENABLE: + if (state != USB_STATE_CONFIGURED || speed < USB_SPEED_SUPER) + return -EINVAL; + + pdev->u2_allowed = !!set; + trace_cdnsp_u2(set); + break; + case USB_DEVICE_LTM_ENABLE: + return -EINVAL; + case USB_DEVICE_TEST_MODE: + if (state != USB_STATE_CONFIGURED || speed > USB_SPEED_HIGH) + return -EINVAL; + + tmode = le16_to_cpu(ctrl->wIndex); + + if (!set || (tmode & 0xff) != 0) + return -EINVAL; + + tmode = tmode >> 8; + + if (tmode > USB_TEST_FORCE_ENABLE || tmode < USB_TEST_J) + return -EINVAL; + + pdev->test_mode = tmode; + + /* + * Test mode must be set before Status Stage but controller + * will start testing sequence after Status Stage. + */ + cdnsp_enter_test_mode(pdev); + break; + default: + return -EINVAL; + } + + return 0; +} + +static int cdnsp_ep0_handle_feature_intf(struct cdnsp_device *pdev, + struct usb_ctrlrequest *ctrl, + int set) +{ + u16 wValue, wIndex; + int ret; + + wValue = le16_to_cpu(ctrl->wValue); + wIndex = le16_to_cpu(ctrl->wIndex); + + switch (wValue) { + case USB_INTRF_FUNC_SUSPEND: + ret = cdnsp_ep0_delegate_req(pdev, ctrl); + if (ret) + return ret; + + /* + * Remote wakeup is enabled when any function within a device + * is enabled for function remote wakeup. + */ + if (wIndex & USB_INTRF_FUNC_SUSPEND_RW) + pdev->may_wakeup++; + else + if (pdev->may_wakeup > 0) + pdev->may_wakeup--; + + return 0; + default: + return -EINVAL; + } + + return 0; +} + +static int cdnsp_ep0_handle_feature_endpoint(struct cdnsp_device *pdev, + struct usb_ctrlrequest *ctrl, + int set) +{ + struct cdnsp_ep *pep; + u16 wValue; + + wValue = le16_to_cpu(ctrl->wValue); + pep = &pdev->eps[cdnsp_w_index_to_ep_index(le16_to_cpu(ctrl->wIndex))]; + + switch (wValue) { + case USB_ENDPOINT_HALT: + if (!set && (pep->ep_state & EP_WEDGE)) { + /* Resets Sequence Number */ + cdnsp_halt_endpoint(pdev, pep, 0); + cdnsp_halt_endpoint(pdev, pep, 1); + break; + } + + return cdnsp_halt_endpoint(pdev, pep, set); + default: + dev_warn(pdev->dev, "WARN Incorrect wValue %04x\n", wValue); + return -EINVAL; + } + + return 0; +} + +static int cdnsp_ep0_handle_feature(struct cdnsp_device *pdev, + struct usb_ctrlrequest *ctrl, + int set) +{ + switch (ctrl->bRequestType & USB_RECIP_MASK) { + case USB_RECIP_DEVICE: + return cdnsp_ep0_handle_feature_device(pdev, ctrl, set); + case USB_RECIP_INTERFACE: + return cdnsp_ep0_handle_feature_intf(pdev, ctrl, set); + case USB_RECIP_ENDPOINT: + return cdnsp_ep0_handle_feature_endpoint(pdev, ctrl, set); + default: + return -EINVAL; + } +} + +static int cdnsp_ep0_set_sel(struct cdnsp_device *pdev, + struct usb_ctrlrequest *ctrl) +{ + enum usb_device_state state = pdev->gadget.state; + u16 wLength; + + if (state == USB_STATE_DEFAULT) + return -EINVAL; + + wLength = le16_to_cpu(ctrl->wLength); + + if (wLength != 6) { + dev_err(pdev->dev, "Set SEL should be 6 bytes, got %d\n", + wLength); + return -EINVAL; + } + + /* + * To handle Set SEL we need to receive 6 bytes from Host. So let's + * queue a usb_request for 6 bytes. + */ + pdev->ep0_preq.request.length = 6; + pdev->ep0_preq.request.buf = pdev->setup_buf; + + return cdnsp_ep_enqueue(pdev->ep0_preq.pep, &pdev->ep0_preq); +} + +static int cdnsp_ep0_set_isoch_delay(struct cdnsp_device *pdev, + struct usb_ctrlrequest *ctrl) +{ + if (le16_to_cpu(ctrl->wIndex) || le16_to_cpu(ctrl->wLength)) + return -EINVAL; + + pdev->gadget.isoch_delay = le16_to_cpu(ctrl->wValue); + + return 0; +} + +static int cdnsp_ep0_std_request(struct cdnsp_device *pdev, + struct usb_ctrlrequest *ctrl) +{ + int ret; + + switch (ctrl->bRequest) { + case USB_REQ_GET_STATUS: + ret = cdnsp_ep0_handle_status(pdev, ctrl); + break; + case USB_REQ_CLEAR_FEATURE: + ret = cdnsp_ep0_handle_feature(pdev, ctrl, 0); + break; + case USB_REQ_SET_FEATURE: + ret = cdnsp_ep0_handle_feature(pdev, ctrl, 1); + break; + case USB_REQ_SET_ADDRESS: + ret = cdnsp_ep0_set_address(pdev, ctrl); + break; + case USB_REQ_SET_CONFIGURATION: + ret = cdnsp_ep0_set_config(pdev, ctrl); + break; + case USB_REQ_SET_SEL: + ret = cdnsp_ep0_set_sel(pdev, ctrl); + break; + case USB_REQ_SET_ISOCH_DELAY: + ret = cdnsp_ep0_set_isoch_delay(pdev, ctrl); + break; + case USB_REQ_SET_INTERFACE: + /* + * Add request into pending list to block sending status stage + * by libcomposite. + */ + list_add_tail(&pdev->ep0_preq.list, + &pdev->ep0_preq.pep->pending_list); + + ret = cdnsp_ep0_delegate_req(pdev, ctrl); + if (ret == -EBUSY) + ret = 0; + + list_del(&pdev->ep0_preq.list); + break; + default: + ret = cdnsp_ep0_delegate_req(pdev, ctrl); + break; + } + + return ret; +} + +void cdnsp_setup_analyze(struct cdnsp_device *pdev) +{ + struct usb_ctrlrequest *ctrl = &pdev->setup; + int ret = 0; + u16 len; + + trace_cdnsp_ctrl_req(ctrl); + + if (!pdev->gadget_driver) + goto out; + + if (pdev->gadget.state == USB_STATE_NOTATTACHED) { + dev_err(pdev->dev, "ERR: Setup detected in unattached state\n"); + ret = -EINVAL; + goto out; + } + + /* Restore the ep0 to Stopped/Running state. */ + if (pdev->eps[0].ep_state & EP_HALTED) { + trace_cdnsp_ep0_halted("Restore to normal state"); + cdnsp_halt_endpoint(pdev, &pdev->eps[0], 0); + } + + /* + * Finishing previous SETUP transfer by removing request from + * list and informing upper layer + */ + if (!list_empty(&pdev->eps[0].pending_list)) { + struct cdnsp_request *req; + + trace_cdnsp_ep0_request("Remove previous"); + req = next_request(&pdev->eps[0].pending_list); + cdnsp_ep_dequeue(&pdev->eps[0], req); + } + + len = le16_to_cpu(ctrl->wLength); + if (!len) { + pdev->three_stage_setup = false; + pdev->ep0_expect_in = false; + } else { + pdev->three_stage_setup = true; + pdev->ep0_expect_in = !!(ctrl->bRequestType & USB_DIR_IN); + } + + if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) + ret = cdnsp_ep0_std_request(pdev, ctrl); + else + ret = cdnsp_ep0_delegate_req(pdev, ctrl); + + if (!len) + pdev->ep0_stage = CDNSP_STATUS_STAGE; + + if (ret == USB_GADGET_DELAYED_STATUS) { + trace_cdnsp_ep0_status_stage("delayed"); + return; + } +out: + if (ret < 0) + cdnsp_ep0_stall(pdev); + else if (pdev->ep0_stage == CDNSP_STATUS_STAGE) + cdnsp_status_stage(pdev); +} -- cgit v1.2.3