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, 1192 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/carl9170/usb.c b/drivers/net/wireless/ath/carl9170/usb.c
new file mode 100644
index 000000000..e4eb666c6
--- /dev/null
+++ b/drivers/net/wireless/ath/carl9170/usb.c
@@ -0,0 +1,1192 @@
+/*
+ * Atheros CARL9170 driver
+ *
+ * USB - frontend
+ *
+ * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
+ * Copyright 2009, 2010, Christian Lamparter <chunkeey@googlemail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, see
+ * http://www.gnu.org/licenses/.
+ *
+ * This file incorporates work covered by the following copyright and
+ * permission notice:
+ *    Copyright (c) 2007-2008 Atheros Communications, Inc.
+ *
+ *    Permission to use, copy, modify, and/or distribute this software for any
+ *    purpose with or without fee is hereby granted, provided that the above
+ *    copyright notice and this permission notice appear in all copies.
+ *
+ *    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *    WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *    MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *    ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+#include <linux/firmware.h>
+#include <linux/etherdevice.h>
+#include <linux/device.h>
+#include <net/mac80211.h>
+#include "carl9170.h"
+#include "cmd.h"
+#include "hw.h"
+#include "fwcmd.h"
+
+MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
+MODULE_AUTHOR("Christian Lamparter <chunkeey@googlemail.com>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Atheros AR9170 802.11n USB wireless");
+MODULE_FIRMWARE(CARL9170FW_NAME);
+MODULE_ALIAS("ar9170usb");
+MODULE_ALIAS("arusb_lnx");
+
+/*
+ * Note:
+ *
+ * Always update our wiki's device list (located at:
+ * https://wireless.wiki.kernel.org/en/users/Drivers/ar9170/devices ),
+ * whenever you add a new device.
+ */
+static const struct usb_device_id carl9170_usb_ids[] = {
+	/* Atheros 9170 */
+	{ USB_DEVICE(0x0cf3, 0x9170) },
+	/* Atheros TG121N */
+	{ USB_DEVICE(0x0cf3, 0x1001) },
+	/* TP-Link TL-WN821N v2 */
+	{ USB_DEVICE(0x0cf3, 0x1002), .driver_info = CARL9170_WPS_BUTTON |
+		 CARL9170_ONE_LED },
+	/* 3Com Dual Band 802.11n USB Adapter */
+	{ USB_DEVICE(0x0cf3, 0x1010) },
+	/* H3C Dual Band 802.11n USB Adapter */
+	{ USB_DEVICE(0x0cf3, 0x1011) },
+	/* Cace Airpcap NX */
+	{ USB_DEVICE(0xcace, 0x0300) },
+	/* D-Link DWA 160 A1 */
+	{ USB_DEVICE(0x07d1, 0x3c10) },
+	/* D-Link DWA 160 A2 */
+	{ USB_DEVICE(0x07d1, 0x3a09) },
+	/* D-Link DWA 130 D */
+	{ USB_DEVICE(0x07d1, 0x3a0f) },
+	/* Netgear WNA1000 */
+	{ USB_DEVICE(0x0846, 0x9040) },
+	/* Netgear WNDA3100 (v1) */
+	{ USB_DEVICE(0x0846, 0x9010) },
+	/* Netgear WN111 v2 */
+	{ USB_DEVICE(0x0846, 0x9001), .driver_info = CARL9170_ONE_LED },
+	/* Zydas ZD1221 */
+	{ USB_DEVICE(0x0ace, 0x1221) },
+	/* Proxim ORiNOCO 802.11n USB */
+	{ USB_DEVICE(0x1435, 0x0804) },
+	/* WNC Generic 11n USB Dongle */
+	{ USB_DEVICE(0x1435, 0x0326) },
+	/* ZyXEL NWD271N */
+	{ USB_DEVICE(0x0586, 0x3417) },
+	/* Z-Com UB81 BG */
+	{ USB_DEVICE(0x0cde, 0x0023) },
+	/* Z-Com UB82 ABG */
+	{ USB_DEVICE(0x0cde, 0x0026) },
+	/* Sphairon Homelink 1202 */
+	{ USB_DEVICE(0x0cde, 0x0027) },
+	/* Arcadyan WN7512 */
+	{ USB_DEVICE(0x083a, 0xf522) },
+	/* Planex GWUS300 */
+	{ USB_DEVICE(0x2019, 0x5304) },
+	/* IO-Data WNGDNUS2 */
+	{ USB_DEVICE(0x04bb, 0x093f) },
+	/* NEC WL300NU-G */
+	{ USB_DEVICE(0x0409, 0x0249) },
+	/* NEC WL300NU-AG */
+	{ USB_DEVICE(0x0409, 0x02b4) },
+	/* AVM FRITZ!WLAN USB Stick N */
+	{ USB_DEVICE(0x057c, 0x8401) },
+	/* AVM FRITZ!WLAN USB Stick N 2.4 */
+	{ USB_DEVICE(0x057c, 0x8402) },
+	/* Qwest/Actiontec 802AIN Wireless N USB Network Adapter */
+	{ USB_DEVICE(0x1668, 0x1200) },
+	/* Airlive X.USB a/b/g/n */
+	{ USB_DEVICE(0x1b75, 0x9170) },
+
+	/* terminate */
+	{}
+};
+MODULE_DEVICE_TABLE(usb, carl9170_usb_ids);
+
+static struct usb_driver carl9170_driver;
+
+static void carl9170_usb_submit_data_urb(struct ar9170 *ar)
+{
+	struct urb *urb;
+	int err;
+
+	if (atomic_inc_return(&ar->tx_anch_urbs) > AR9170_NUM_TX_URBS)
+		goto err_acc;
+
+	urb = usb_get_from_anchor(&ar->tx_wait);
+	if (!urb)
+		goto err_acc;
+
+	usb_anchor_urb(urb, &ar->tx_anch);
+
+	err = usb_submit_urb(urb, GFP_ATOMIC);
+	if (unlikely(err)) {
+		if (net_ratelimit()) {
+			dev_err(&ar->udev->dev, "tx submit failed (%d)\n",
+				urb->status);
+		}
+
+		usb_unanchor_urb(urb);
+		usb_anchor_urb(urb, &ar->tx_err);
+	}
+
+	usb_free_urb(urb);
+
+	if (likely(err == 0))
+		return;
+
+err_acc:
+	atomic_dec(&ar->tx_anch_urbs);
+}
+
+static void carl9170_usb_tx_data_complete(struct urb *urb)
+{
+	struct ar9170 *ar = usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
+
+	if (WARN_ON_ONCE(!ar)) {
+		dev_kfree_skb_irq(urb->context);
+		return;
+	}
+
+	atomic_dec(&ar->tx_anch_urbs);
+
+	switch (urb->status) {
+	/* everything is fine */
+	case 0:
+		carl9170_tx_callback(ar, (void *)urb->context);
+		break;
+
+	/* disconnect */
+	case -ENOENT:
+	case -ECONNRESET:
+	case -ENODEV:
+	case -ESHUTDOWN:
+		/*
+		 * Defer the frame clean-up to the tasklet worker.
+		 * This is necessary, because carl9170_tx_drop
+		 * does not work in an irqsave context.
+		 */
+		usb_anchor_urb(urb, &ar->tx_err);
+		return;
+
+	/* a random transmission error has occurred? */
+	default:
+		if (net_ratelimit()) {
+			dev_err(&ar->udev->dev, "tx failed (%d)\n",
+				urb->status);
+		}
+
+		usb_anchor_urb(urb, &ar->tx_err);
+		break;
+	}
+
+	if (likely(IS_STARTED(ar)))
+		carl9170_usb_submit_data_urb(ar);
+}
+
+static int carl9170_usb_submit_cmd_urb(struct ar9170 *ar)
+{
+	struct urb *urb;
+	int err;
+
+	if (atomic_inc_return(&ar->tx_cmd_urbs) != 1) {
+		atomic_dec(&ar->tx_cmd_urbs);
+		return 0;
+	}
+
+	urb = usb_get_from_anchor(&ar->tx_cmd);
+	if (!urb) {
+		atomic_dec(&ar->tx_cmd_urbs);
+		return 0;
+	}
+
+	usb_anchor_urb(urb, &ar->tx_anch);
+	err = usb_submit_urb(urb, GFP_ATOMIC);
+	if (unlikely(err)) {
+		usb_unanchor_urb(urb);
+		atomic_dec(&ar->tx_cmd_urbs);
+	}
+	usb_free_urb(urb);
+
+	return err;
+}
+
+static void carl9170_usb_cmd_complete(struct urb *urb)
+{
+	struct ar9170 *ar = urb->context;
+	int err = 0;
+
+	if (WARN_ON_ONCE(!ar))
+		return;
+
+	atomic_dec(&ar->tx_cmd_urbs);
+
+	switch (urb->status) {
+	/* everything is fine */
+	case 0:
+		break;
+
+	/* disconnect */
+	case -ENOENT:
+	case -ECONNRESET:
+	case -ENODEV:
+	case -ESHUTDOWN:
+		return;
+
+	default:
+		err = urb->status;
+		break;
+	}
+
+	if (!IS_INITIALIZED(ar))
+		return;
+
+	if (err)
+		dev_err(&ar->udev->dev, "submit cmd cb failed (%d).\n", err);
+
+	err = carl9170_usb_submit_cmd_urb(ar);
+	if (err)
+		dev_err(&ar->udev->dev, "submit cmd failed (%d).\n", err);
+}
+
+static void carl9170_usb_rx_irq_complete(struct urb *urb)
+{
+	struct ar9170 *ar = urb->context;
+
+	if (WARN_ON_ONCE(!ar))
+		return;
+
+	switch (urb->status) {
+	/* everything is fine */
+	case 0:
+		break;
+
+	/* disconnect */
+	case -ENOENT:
+	case -ECONNRESET:
+	case -ENODEV:
+	case -ESHUTDOWN:
+		return;
+
+	default:
+		goto resubmit;
+	}
+
+	/*
+	 * While the carl9170 firmware does not use this EP, the
+	 * firmware loader in the EEPROM unfortunately does.
+	 * Therefore we need to be ready to handle out-of-band
+	 * responses and traps in case the firmware crashed and
+	 * the loader took over again.
+	 */
+	carl9170_handle_command_response(ar, urb->transfer_buffer,
+					 urb->actual_length);
+
+resubmit:
+	usb_anchor_urb(urb, &ar->rx_anch);
+	if (unlikely(usb_submit_urb(urb, GFP_ATOMIC)))
+		usb_unanchor_urb(urb);
+}
+
+static int carl9170_usb_submit_rx_urb(struct ar9170 *ar, gfp_t gfp)
+{
+	struct urb *urb;
+	int err = 0, runs = 0;
+
+	while ((atomic_read(&ar->rx_anch_urbs) < AR9170_NUM_RX_URBS) &&
+		(runs++ < AR9170_NUM_RX_URBS)) {
+		err = -ENOSPC;
+		urb = usb_get_from_anchor(&ar->rx_pool);
+		if (urb) {
+			usb_anchor_urb(urb, &ar->rx_anch);
+			err = usb_submit_urb(urb, gfp);
+			if (unlikely(err)) {
+				usb_unanchor_urb(urb);
+				usb_anchor_urb(urb, &ar->rx_pool);
+			} else {
+				atomic_dec(&ar->rx_pool_urbs);
+				atomic_inc(&ar->rx_anch_urbs);
+			}
+			usb_free_urb(urb);
+		}
+	}
+
+	return err;
+}
+
+static void carl9170_usb_rx_work(struct ar9170 *ar)
+{
+	struct urb *urb;
+	int i;
+
+	for (i = 0; i < AR9170_NUM_RX_URBS_POOL; i++) {
+		urb = usb_get_from_anchor(&ar->rx_work);
+		if (!urb)
+			break;
+
+		atomic_dec(&ar->rx_work_urbs);
+		if (IS_INITIALIZED(ar)) {
+			carl9170_rx(ar, urb->transfer_buffer,
+				    urb->actual_length);
+		}
+
+		usb_anchor_urb(urb, &ar->rx_pool);
+		atomic_inc(&ar->rx_pool_urbs);
+
+		usb_free_urb(urb);
+
+		carl9170_usb_submit_rx_urb(ar, GFP_ATOMIC);
+	}
+}
+
+void carl9170_usb_handle_tx_err(struct ar9170 *ar)
+{
+	struct urb *urb;
+
+	while ((urb = usb_get_from_anchor(&ar->tx_err))) {
+		struct sk_buff *skb = (void *)urb->context;
+
+		carl9170_tx_drop(ar, skb);
+		carl9170_tx_callback(ar, skb);
+		usb_free_urb(urb);
+	}
+}
+
+static void carl9170_usb_tasklet(struct tasklet_struct *t)
+{
+	struct ar9170 *ar = from_tasklet(ar, t, usb_tasklet);
+
+	if (!IS_INITIALIZED(ar))
+		return;
+
+	carl9170_usb_rx_work(ar);
+
+	/*
+	 * Strictly speaking: The tx scheduler is not part of the USB system.
+	 * But the rx worker returns frames back to the mac80211-stack and
+	 * this is the _perfect_ place to generate the next transmissions.
+	 */
+	if (IS_STARTED(ar))
+		carl9170_tx_scheduler(ar);
+}
+
+static void carl9170_usb_rx_complete(struct urb *urb)
+{
+	struct ar9170 *ar = (struct ar9170 *)urb->context;
+	int err;
+
+	if (WARN_ON_ONCE(!ar))
+		return;
+
+	atomic_dec(&ar->rx_anch_urbs);
+
+	switch (urb->status) {
+	case 0:
+		/* rx path */
+		usb_anchor_urb(urb, &ar->rx_work);
+		atomic_inc(&ar->rx_work_urbs);
+		break;
+
+	case -ENOENT:
+	case -ECONNRESET:
+	case -ENODEV:
+	case -ESHUTDOWN:
+		/* handle disconnect events*/
+		return;
+
+	default:
+		/* handle all other errors */
+		usb_anchor_urb(urb, &ar->rx_pool);
+		atomic_inc(&ar->rx_pool_urbs);
+		break;
+	}
+
+	err = carl9170_usb_submit_rx_urb(ar, GFP_ATOMIC);
+	if (unlikely(err)) {
+		/*
+		 * usb_submit_rx_urb reported a problem.
+		 * In case this is due to a rx buffer shortage,
+		 * elevate the tasklet worker priority to
+		 * the highest available level.
+		 */
+		tasklet_hi_schedule(&ar->usb_tasklet);
+
+		if (atomic_read(&ar->rx_anch_urbs) == 0) {
+			/*
+			 * The system is too slow to cope with
+			 * the enormous workload. We have simply
+			 * run out of active rx urbs and this
+			 * unfortunately leads to an unpredictable
+			 * device.
+			 */
+
+			ieee80211_queue_work(ar->hw, &ar->ping_work);
+		}
+	} else {
+		/*
+		 * Using anything less than _high_ priority absolutely
+		 * kills the rx performance my UP-System...
+		 */
+		tasklet_hi_schedule(&ar->usb_tasklet);
+	}
+}
+
+static struct urb *carl9170_usb_alloc_rx_urb(struct ar9170 *ar, gfp_t gfp)
+{
+	struct urb *urb;
+	void *buf;
+
+	buf = kmalloc(ar->fw.rx_size, gfp);
+	if (!buf)
+		return NULL;
+
+	urb = usb_alloc_urb(0, gfp);
+	if (!urb) {
+		kfree(buf);
+		return NULL;
+	}
+
+	usb_fill_bulk_urb(urb, ar->udev, usb_rcvbulkpipe(ar->udev,
+			  AR9170_USB_EP_RX), buf, ar->fw.rx_size,
+			  carl9170_usb_rx_complete, ar);
+
+	urb->transfer_flags |= URB_FREE_BUFFER;
+
+	return urb;
+}
+
+static int carl9170_usb_send_rx_irq_urb(struct ar9170 *ar)
+{
+	struct urb *urb = NULL;
+	void *ibuf;
+	int err = -ENOMEM;
+
+	urb = usb_alloc_urb(0, GFP_KERNEL);
+	if (!urb)
+		goto out;
+
+	ibuf = kmalloc(AR9170_USB_EP_CTRL_MAX, GFP_KERNEL);
+	if (!ibuf)
+		goto out;
+
+	usb_fill_int_urb(urb, ar->udev, usb_rcvintpipe(ar->udev,
+			 AR9170_USB_EP_IRQ), ibuf, AR9170_USB_EP_CTRL_MAX,
+			 carl9170_usb_rx_irq_complete, ar, 1);
+
+	urb->transfer_flags |= URB_FREE_BUFFER;
+
+	usb_anchor_urb(urb, &ar->rx_anch);
+	err = usb_submit_urb(urb, GFP_KERNEL);
+	if (err)
+		usb_unanchor_urb(urb);
+
+out:
+	usb_free_urb(urb);
+	return err;
+}
+
+static int carl9170_usb_init_rx_bulk_urbs(struct ar9170 *ar)
+{
+	struct urb *urb;
+	int i, err = -EINVAL;
+
+	/*
+	 * The driver actively maintains a second shadow
+	 * pool for inactive, but fully-prepared rx urbs.
+	 *
+	 * The pool should help the driver to master huge
+	 * workload spikes without running the risk of
+	 * undersupplying the hardware or wasting time by
+	 * processing rx data (streams) inside the urb
+	 * completion (hardirq context).
+	 */
+	for (i = 0; i < AR9170_NUM_RX_URBS_POOL; i++) {
+		urb = carl9170_usb_alloc_rx_urb(ar, GFP_KERNEL);
+		if (!urb) {
+			err = -ENOMEM;
+			goto err_out;
+		}
+
+		usb_anchor_urb(urb, &ar->rx_pool);
+		atomic_inc(&ar->rx_pool_urbs);
+		usb_free_urb(urb);
+	}
+
+	err = carl9170_usb_submit_rx_urb(ar, GFP_KERNEL);
+	if (err)
+		goto err_out;
+
+	/* the device now waiting for the firmware. */
+	carl9170_set_state_when(ar, CARL9170_STOPPED, CARL9170_IDLE);
+	return 0;
+
+err_out:
+
+	usb_scuttle_anchored_urbs(&ar->rx_pool);
+	usb_scuttle_anchored_urbs(&ar->rx_work);
+	usb_kill_anchored_urbs(&ar->rx_anch);
+	return err;
+}
+
+static int carl9170_usb_flush(struct ar9170 *ar)
+{
+	struct urb *urb;
+	int ret, err = 0;
+
+	while ((urb = usb_get_from_anchor(&ar->tx_wait))) {
+		struct sk_buff *skb = (void *)urb->context;
+		carl9170_tx_drop(ar, skb);
+		carl9170_tx_callback(ar, skb);
+		usb_free_urb(urb);
+	}
+
+	ret = usb_wait_anchor_empty_timeout(&ar->tx_cmd, 1000);
+	if (ret == 0)
+		err = -ETIMEDOUT;
+
+	/* lets wait a while until the tx - queues are dried out */
+	ret = usb_wait_anchor_empty_timeout(&ar->tx_anch, 1000);
+	if (ret == 0)
+		err = -ETIMEDOUT;
+
+	usb_kill_anchored_urbs(&ar->tx_anch);
+	carl9170_usb_handle_tx_err(ar);
+
+	return err;
+}
+
+static void carl9170_usb_cancel_urbs(struct ar9170 *ar)
+{
+	int err;
+
+	carl9170_set_state(ar, CARL9170_UNKNOWN_STATE);
+
+	err = carl9170_usb_flush(ar);
+	if (err)
+		dev_err(&ar->udev->dev, "stuck tx urbs!\n");
+
+	usb_poison_anchored_urbs(&ar->tx_anch);
+	carl9170_usb_handle_tx_err(ar);
+	usb_poison_anchored_urbs(&ar->rx_anch);
+
+	tasklet_kill(&ar->usb_tasklet);
+
+	usb_scuttle_anchored_urbs(&ar->rx_work);
+	usb_scuttle_anchored_urbs(&ar->rx_pool);
+	usb_scuttle_anchored_urbs(&ar->tx_cmd);
+}
+
+int __carl9170_exec_cmd(struct ar9170 *ar, struct carl9170_cmd *cmd,
+			const bool free_buf)
+{
+	struct urb *urb;
+	int err = 0;
+
+	if (!IS_INITIALIZED(ar)) {
+		err = -EPERM;
+		goto err_free;
+	}
+
+	if (WARN_ON(cmd->hdr.len > CARL9170_MAX_CMD_LEN - 4)) {
+		err = -EINVAL;
+		goto err_free;
+	}
+
+	urb = usb_alloc_urb(0, GFP_ATOMIC);
+	if (!urb) {
+		err = -ENOMEM;
+		goto err_free;
+	}
+
+	if (ar->usb_ep_cmd_is_bulk)
+		usb_fill_bulk_urb(urb, ar->udev,
+				  usb_sndbulkpipe(ar->udev, AR9170_USB_EP_CMD),
+				  cmd, cmd->hdr.len + 4,
+				  carl9170_usb_cmd_complete, ar);
+	else
+		usb_fill_int_urb(urb, ar->udev,
+				 usb_sndintpipe(ar->udev, AR9170_USB_EP_CMD),
+				 cmd, cmd->hdr.len + 4,
+				 carl9170_usb_cmd_complete, ar, 1);
+
+	if (free_buf)
+		urb->transfer_flags |= URB_FREE_BUFFER;
+
+	usb_anchor_urb(urb, &ar->tx_cmd);
+	usb_free_urb(urb);
+
+	return carl9170_usb_submit_cmd_urb(ar);
+
+err_free:
+	if (free_buf)
+		kfree(cmd);
+
+	return err;
+}
+
+int carl9170_exec_cmd(struct ar9170 *ar, const enum carl9170_cmd_oids cmd,
+	unsigned int plen, void *payload, unsigned int outlen, void *out)
+{
+	int err = -ENOMEM;
+	unsigned long time_left;
+
+	if (!IS_ACCEPTING_CMD(ar))
+		return -EIO;
+
+	if (!(cmd & CARL9170_CMD_ASYNC_FLAG))
+		might_sleep();
+
+	ar->cmd.hdr.len = plen;
+	ar->cmd.hdr.cmd = cmd;
+	/* writing multiple regs fills this buffer already */
+	if (plen && payload != (u8 *)(ar->cmd.data))
+		memcpy(ar->cmd.data, payload, plen);
+
+	spin_lock_bh(&ar->cmd_lock);
+	ar->readbuf = (u8 *)out;
+	ar->readlen = outlen;
+	spin_unlock_bh(&ar->cmd_lock);
+
+	reinit_completion(&ar->cmd_wait);
+	err = __carl9170_exec_cmd(ar, &ar->cmd, false);
+
+	if (!(cmd & CARL9170_CMD_ASYNC_FLAG)) {
+		time_left = wait_for_completion_timeout(&ar->cmd_wait, HZ);
+		if (time_left == 0) {
+			err = -ETIMEDOUT;
+			goto err_unbuf;
+		}
+
+		if (ar->readlen != outlen) {
+			err = -EMSGSIZE;
+			goto err_unbuf;
+		}
+	}
+
+	return 0;
+
+err_unbuf:
+	/* Maybe the device was removed in the moment we were waiting? */
+	if (IS_STARTED(ar)) {
+		dev_err(&ar->udev->dev, "no command feedback "
+			"received (%d).\n", err);
+
+		/* provide some maybe useful debug information */
+		print_hex_dump_bytes("carl9170 cmd: ", DUMP_PREFIX_NONE,
+				     &ar->cmd, plen + 4);
+
+		carl9170_restart(ar, CARL9170_RR_COMMAND_TIMEOUT);
+	}
+
+	/* invalidate to avoid completing the next command prematurely */
+	spin_lock_bh(&ar->cmd_lock);
+	ar->readbuf = NULL;
+	ar->readlen = 0;
+	spin_unlock_bh(&ar->cmd_lock);
+
+	return err;
+}
+
+void carl9170_usb_tx(struct ar9170 *ar, struct sk_buff *skb)
+{
+	struct urb *urb;
+	struct ar9170_stream *tx_stream;
+	void *data;
+	unsigned int len;
+
+	if (!IS_STARTED(ar))
+		goto err_drop;
+
+	urb = usb_alloc_urb(0, GFP_ATOMIC);
+	if (!urb)
+		goto err_drop;
+
+	if (ar->fw.tx_stream) {
+		tx_stream = (void *) (skb->data - sizeof(*tx_stream));
+
+		len = skb->len + sizeof(*tx_stream);
+		tx_stream->length = cpu_to_le16(len);
+		tx_stream->tag = cpu_to_le16(AR9170_TX_STREAM_TAG);
+		data = tx_stream;
+	} else {
+		data = skb->data;
+		len = skb->len;
+	}
+
+	usb_fill_bulk_urb(urb, ar->udev, usb_sndbulkpipe(ar->udev,
+		AR9170_USB_EP_TX), data, len,
+		carl9170_usb_tx_data_complete, skb);
+
+	urb->transfer_flags |= URB_ZERO_PACKET;
+
+	usb_anchor_urb(urb, &ar->tx_wait);
+
+	usb_free_urb(urb);
+
+	carl9170_usb_submit_data_urb(ar);
+	return;
+
+err_drop:
+	carl9170_tx_drop(ar, skb);
+	carl9170_tx_callback(ar, skb);
+}
+
+static void carl9170_release_firmware(struct ar9170 *ar)
+{
+	if (ar->fw.fw) {
+		release_firmware(ar->fw.fw);
+		memset(&ar->fw, 0, sizeof(ar->fw));
+	}
+}
+
+void carl9170_usb_stop(struct ar9170 *ar)
+{
+	int ret;
+
+	carl9170_set_state_when(ar, CARL9170_IDLE, CARL9170_STOPPED);
+
+	ret = carl9170_usb_flush(ar);
+	if (ret)
+		dev_err(&ar->udev->dev, "kill pending tx urbs.\n");
+
+	usb_poison_anchored_urbs(&ar->tx_anch);
+	carl9170_usb_handle_tx_err(ar);
+
+	/* kill any pending command */
+	spin_lock_bh(&ar->cmd_lock);
+	ar->readlen = 0;
+	spin_unlock_bh(&ar->cmd_lock);
+	complete(&ar->cmd_wait);
+
+	/*
+	 * Note:
+	 * So far we freed all tx urbs, but we won't dare to touch any rx urbs.
+	 * Else we would end up with a unresponsive device...
+	 */
+}
+
+int carl9170_usb_open(struct ar9170 *ar)
+{
+	usb_unpoison_anchored_urbs(&ar->tx_anch);
+
+	carl9170_set_state_when(ar, CARL9170_STOPPED, CARL9170_IDLE);
+	return 0;
+}
+
+static int carl9170_usb_load_firmware(struct ar9170 *ar)
+{
+	const u8 *data;
+	u8 *buf;
+	unsigned int transfer;
+	size_t len;
+	u32 addr;
+	int err = 0;
+
+	buf = kmalloc(4096, GFP_KERNEL);
+	if (!buf) {
+		err = -ENOMEM;
+		goto err_out;
+	}
+
+	data = ar->fw.fw->data;
+	len = ar->fw.fw->size;
+	addr = ar->fw.address;
+
+	/* this removes the miniboot image */
+	data += ar->fw.offset;
+	len -= ar->fw.offset;
+
+	while (len) {
+		transfer = min_t(unsigned int, len, 4096u);
+		memcpy(buf, data, transfer);
+
+		err = usb_control_msg(ar->udev, usb_sndctrlpipe(ar->udev, 0),
+				      0x30 /* FW DL */, 0x40 | USB_DIR_OUT,
+				      addr >> 8, 0, buf, transfer, 100);
+
+		if (err < 0) {
+			kfree(buf);
+			goto err_out;
+		}
+
+		len -= transfer;
+		data += transfer;
+		addr += transfer;
+	}
+	kfree(buf);
+
+	err = usb_control_msg(ar->udev, usb_sndctrlpipe(ar->udev, 0),
+			      0x31 /* FW DL COMPLETE */,
+			      0x40 | USB_DIR_OUT, 0, 0, NULL, 0, 200);
+
+	if (wait_for_completion_timeout(&ar->fw_boot_wait, HZ) == 0) {
+		err = -ETIMEDOUT;
+		goto err_out;
+	}
+
+	err = carl9170_echo_test(ar, 0x4a110123);
+	if (err)
+		goto err_out;
+
+	/* now, start the command response counter */
+	ar->cmd_seq = -1;
+
+	return 0;
+
+err_out:
+	dev_err(&ar->udev->dev, "firmware upload failed (%d).\n", err);
+	return err;
+}
+
+int carl9170_usb_restart(struct ar9170 *ar)
+{
+	int err = 0;
+
+	if (ar->intf->condition != USB_INTERFACE_BOUND)
+		return 0;
+
+	/*
+	 * Disable the command response sequence counter check.
+	 * We already know that the device/firmware is in a bad state.
+	 * So, no extra points are awarded to anyone who reminds the
+	 * driver about that.
+	 */
+	ar->cmd_seq = -2;
+
+	err = carl9170_reboot(ar);
+
+	carl9170_usb_stop(ar);
+
+	if (err)
+		goto err_out;
+
+	tasklet_schedule(&ar->usb_tasklet);
+
+	/* The reboot procedure can take quite a while to complete. */
+	msleep(1100);
+
+	err = carl9170_usb_open(ar);
+	if (err)
+		goto err_out;
+
+	err = carl9170_usb_load_firmware(ar);
+	if (err)
+		goto err_out;
+
+	return 0;
+
+err_out:
+	carl9170_usb_cancel_urbs(ar);
+	return err;
+}
+
+void carl9170_usb_reset(struct ar9170 *ar)
+{
+	/*
+	 * This is the last resort to get the device going again
+	 * without any *user replugging action*.
+	 *
+	 * But there is a catch: usb_reset really is like a physical
+	 * *reconnect*. The mac80211 state will be lost in the process.
+	 * Therefore a userspace application, which is monitoring
+	 * the link must step in.
+	 */
+	carl9170_usb_cancel_urbs(ar);
+
+	carl9170_usb_stop(ar);
+
+	usb_queue_reset_device(ar->intf);
+}
+
+static int carl9170_usb_init_device(struct ar9170 *ar)
+{
+	int err;
+
+	/*
+	 * The carl9170 firmware let's the driver know when it's
+	 * ready for action. But we have to be prepared to gracefully
+	 * handle all spurious [flushed] messages after each (re-)boot.
+	 * Thus the command response counter remains disabled until it
+	 * can be safely synchronized.
+	 */
+	ar->cmd_seq = -2;
+
+	err = carl9170_usb_send_rx_irq_urb(ar);
+	if (err)
+		goto err_out;
+
+	err = carl9170_usb_init_rx_bulk_urbs(ar);
+	if (err)
+		goto err_unrx;
+
+	err = carl9170_usb_open(ar);
+	if (err)
+		goto err_unrx;
+
+	mutex_lock(&ar->mutex);
+	err = carl9170_usb_load_firmware(ar);
+	mutex_unlock(&ar->mutex);
+	if (err)
+		goto err_stop;
+
+	return 0;
+
+err_stop:
+	carl9170_usb_stop(ar);
+
+err_unrx:
+	carl9170_usb_cancel_urbs(ar);
+
+err_out:
+	return err;
+}
+
+static void carl9170_usb_firmware_failed(struct ar9170 *ar)
+{
+	/* Store a copies of the usb_interface and usb_device pointer locally.
+	 * This is because release_driver initiates carl9170_usb_disconnect,
+	 * which in turn frees our driver context (ar).
+	 */
+	struct usb_interface *intf = ar->intf;
+	struct usb_device *udev = ar->udev;
+
+	complete(&ar->fw_load_wait);
+	/* at this point 'ar' could be already freed. Don't use it anymore */
+	ar = NULL;
+
+	/* unbind anything failed */
+	usb_lock_device(udev);
+	usb_driver_release_interface(&carl9170_driver, intf);
+	usb_unlock_device(udev);
+
+	usb_put_intf(intf);
+}
+
+static void carl9170_usb_firmware_finish(struct ar9170 *ar)
+{
+	struct usb_interface *intf = ar->intf;
+	int err;
+
+	err = carl9170_parse_firmware(ar);
+	if (err)
+		goto err_freefw;
+
+	err = carl9170_usb_init_device(ar);
+	if (err)
+		goto err_freefw;
+
+	err = carl9170_register(ar);
+
+	carl9170_usb_stop(ar);
+	if (err)
+		goto err_unrx;
+
+	complete(&ar->fw_load_wait);
+	usb_put_intf(intf);
+	return;
+
+err_unrx:
+	carl9170_usb_cancel_urbs(ar);
+
+err_freefw:
+	carl9170_release_firmware(ar);
+	carl9170_usb_firmware_failed(ar);
+}
+
+static void carl9170_usb_firmware_step2(const struct firmware *fw,
+					void *context)
+{
+	struct ar9170 *ar = context;
+
+	if (fw) {
+		ar->fw.fw = fw;
+		carl9170_usb_firmware_finish(ar);
+		return;
+	}
+
+	dev_err(&ar->udev->dev, "firmware not found.\n");
+	carl9170_usb_firmware_failed(ar);
+}
+
+static int carl9170_usb_probe(struct usb_interface *intf,
+			      const struct usb_device_id *id)
+{
+	struct usb_endpoint_descriptor *ep;
+	struct ar9170 *ar;
+	struct usb_device *udev;
+	int i, err;
+
+	err = usb_reset_device(interface_to_usbdev(intf));
+	if (err)
+		return err;
+
+	ar = carl9170_alloc(sizeof(*ar));
+	if (IS_ERR(ar))
+		return PTR_ERR(ar);
+
+	udev = interface_to_usbdev(intf);
+	ar->udev = udev;
+	ar->intf = intf;
+	ar->features = id->driver_info;
+
+	/* We need to remember the type of endpoint 4 because it differs
+	 * between high- and full-speed configuration. The high-speed
+	 * configuration specifies it as interrupt and the full-speed
+	 * configuration as bulk endpoint. This information is required
+	 * later when sending urbs to that endpoint.
+	 */
+	for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; ++i) {
+		ep = &intf->cur_altsetting->endpoint[i].desc;
+
+		if (usb_endpoint_num(ep) == AR9170_USB_EP_CMD &&
+		    usb_endpoint_dir_out(ep) &&
+		    usb_endpoint_type(ep) == USB_ENDPOINT_XFER_BULK)
+			ar->usb_ep_cmd_is_bulk = true;
+	}
+
+	usb_set_intfdata(intf, ar);
+	SET_IEEE80211_DEV(ar->hw, &intf->dev);
+
+	init_usb_anchor(&ar->rx_anch);
+	init_usb_anchor(&ar->rx_pool);
+	init_usb_anchor(&ar->rx_work);
+	init_usb_anchor(&ar->tx_wait);
+	init_usb_anchor(&ar->tx_anch);
+	init_usb_anchor(&ar->tx_cmd);
+	init_usb_anchor(&ar->tx_err);
+	init_completion(&ar->cmd_wait);
+	init_completion(&ar->fw_boot_wait);
+	init_completion(&ar->fw_load_wait);
+	tasklet_setup(&ar->usb_tasklet, carl9170_usb_tasklet);
+
+	atomic_set(&ar->tx_cmd_urbs, 0);
+	atomic_set(&ar->tx_anch_urbs, 0);
+	atomic_set(&ar->rx_work_urbs, 0);
+	atomic_set(&ar->rx_anch_urbs, 0);
+	atomic_set(&ar->rx_pool_urbs, 0);
+
+	usb_get_intf(intf);
+
+	carl9170_set_state(ar, CARL9170_STOPPED);
+
+	err = request_firmware_nowait(THIS_MODULE, 1, CARL9170FW_NAME,
+		&ar->udev->dev, GFP_KERNEL, ar, carl9170_usb_firmware_step2);
+	if (err) {
+		usb_put_intf(intf);
+		carl9170_free(ar);
+	}
+	return err;
+}
+
+static void carl9170_usb_disconnect(struct usb_interface *intf)
+{
+	struct ar9170 *ar = usb_get_intfdata(intf);
+
+	if (WARN_ON(!ar))
+		return;
+
+	wait_for_completion(&ar->fw_load_wait);
+
+	if (IS_INITIALIZED(ar)) {
+		carl9170_reboot(ar);
+		carl9170_usb_stop(ar);
+	}
+
+	carl9170_usb_cancel_urbs(ar);
+	carl9170_unregister(ar);
+
+	usb_set_intfdata(intf, NULL);
+
+	carl9170_release_firmware(ar);
+	carl9170_free(ar);
+}
+
+#ifdef CONFIG_PM
+static int carl9170_usb_suspend(struct usb_interface *intf,
+				pm_message_t message)
+{
+	struct ar9170 *ar = usb_get_intfdata(intf);
+
+	if (!ar)
+		return -ENODEV;
+
+	carl9170_usb_cancel_urbs(ar);
+
+	return 0;
+}
+
+static int carl9170_usb_resume(struct usb_interface *intf)
+{
+	struct ar9170 *ar = usb_get_intfdata(intf);
+	int err;
+
+	if (!ar)
+		return -ENODEV;
+
+	usb_unpoison_anchored_urbs(&ar->rx_anch);
+	carl9170_set_state(ar, CARL9170_STOPPED);
+
+	/*
+	 * The USB documentation demands that [for suspend] all traffic
+	 * to and from the device has to stop. This would be fine, but
+	 * there's a catch: the device[usb phy] does not come back.
+	 *
+	 * Upon resume the firmware will "kill" itself and the
+	 * boot-code sorts out the magic voodoo.
+	 * Not very nice, but there's not much what could go wrong.
+	 */
+	msleep(1100);
+
+	err = carl9170_usb_init_device(ar);
+	if (err)
+		goto err_unrx;
+
+	return 0;
+
+err_unrx:
+	carl9170_usb_cancel_urbs(ar);
+
+	return err;
+}
+#endif /* CONFIG_PM */
+
+static struct usb_driver carl9170_driver = {
+	.name = KBUILD_MODNAME,
+	.probe = carl9170_usb_probe,
+	.disconnect = carl9170_usb_disconnect,
+	.id_table = carl9170_usb_ids,
+	.soft_unbind = 1,
+#ifdef CONFIG_PM
+	.suspend = carl9170_usb_suspend,
+	.resume = carl9170_usb_resume,
+	.reset_resume = carl9170_usb_resume,
+#endif /* CONFIG_PM */
+	.disable_hub_initiated_lpm = 1,
+};
+
+module_usb_driver(carl9170_driver);