196c27377SValentina Manea /* 296c27377SValentina Manea * Copyright (C) 2003-2008 Takahiro Hirofuchi 396c27377SValentina Manea * 496c27377SValentina Manea * This is free software; you can redistribute it and/or modify 596c27377SValentina Manea * it under the terms of the GNU General Public License as published by 696c27377SValentina Manea * the Free Software Foundation; either version 2 of the License, or 796c27377SValentina Manea * (at your option) any later version. 896c27377SValentina Manea * 996c27377SValentina Manea * This is distributed in the hope that it will be useful, 1096c27377SValentina Manea * but WITHOUT ANY WARRANTY; without even the implied warranty of 1196c27377SValentina Manea * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1296c27377SValentina Manea * GNU General Public License for more details. 1396c27377SValentina Manea * 1496c27377SValentina Manea * You should have received a copy of the GNU General Public License 1596c27377SValentina Manea * along with this program; if not, write to the Free Software 1696c27377SValentina Manea * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 1796c27377SValentina Manea * USA. 1896c27377SValentina Manea */ 1996c27377SValentina Manea 2096c27377SValentina Manea #include <linux/device.h> 2196c27377SValentina Manea #include <linux/file.h> 2296c27377SValentina Manea #include <linux/kthread.h> 2396c27377SValentina Manea #include <linux/module.h> 2496c27377SValentina Manea 2596c27377SValentina Manea #include "usbip_common.h" 2696c27377SValentina Manea #include "stub.h" 2796c27377SValentina Manea 2896c27377SValentina Manea /* 2996c27377SValentina Manea * usbip_status shows the status of usbip-host as long as this driver is bound 3096c27377SValentina Manea * to the target device. 3196c27377SValentina Manea */ 3296c27377SValentina Manea static ssize_t usbip_status_show(struct device *dev, 3396c27377SValentina Manea struct device_attribute *attr, char *buf) 3496c27377SValentina Manea { 3596c27377SValentina Manea struct stub_device *sdev = dev_get_drvdata(dev); 3696c27377SValentina Manea int status; 3796c27377SValentina Manea 3896c27377SValentina Manea if (!sdev) { 3996c27377SValentina Manea dev_err(dev, "sdev is null\n"); 4096c27377SValentina Manea return -ENODEV; 4196c27377SValentina Manea } 4296c27377SValentina Manea 4396c27377SValentina Manea spin_lock_irq(&sdev->ud.lock); 4496c27377SValentina Manea status = sdev->ud.status; 4596c27377SValentina Manea spin_unlock_irq(&sdev->ud.lock); 4696c27377SValentina Manea 4796c27377SValentina Manea return snprintf(buf, PAGE_SIZE, "%d\n", status); 4896c27377SValentina Manea } 4996c27377SValentina Manea static DEVICE_ATTR_RO(usbip_status); 5096c27377SValentina Manea 5196c27377SValentina Manea /* 5296c27377SValentina Manea * usbip_sockfd gets a socket descriptor of an established TCP connection that 5396c27377SValentina Manea * is used to transfer usbip requests by kernel threads. -1 is a magic number 5496c27377SValentina Manea * by which usbip connection is finished. 5596c27377SValentina Manea */ 5696c27377SValentina Manea static ssize_t store_sockfd(struct device *dev, struct device_attribute *attr, 5796c27377SValentina Manea const char *buf, size_t count) 5896c27377SValentina Manea { 5996c27377SValentina Manea struct stub_device *sdev = dev_get_drvdata(dev); 6096c27377SValentina Manea int sockfd = 0; 6196c27377SValentina Manea struct socket *socket; 6296c27377SValentina Manea int rv; 6396c27377SValentina Manea 6496c27377SValentina Manea if (!sdev) { 6596c27377SValentina Manea dev_err(dev, "sdev is null\n"); 6696c27377SValentina Manea return -ENODEV; 6796c27377SValentina Manea } 6896c27377SValentina Manea 6996c27377SValentina Manea rv = sscanf(buf, "%d", &sockfd); 7096c27377SValentina Manea if (rv != 1) 7196c27377SValentina Manea return -EINVAL; 7296c27377SValentina Manea 7396c27377SValentina Manea if (sockfd != -1) { 7496c27377SValentina Manea int err; 7596c27377SValentina Manea 7696c27377SValentina Manea dev_info(dev, "stub up\n"); 7796c27377SValentina Manea 7896c27377SValentina Manea spin_lock_irq(&sdev->ud.lock); 7996c27377SValentina Manea 8096c27377SValentina Manea if (sdev->ud.status != SDEV_ST_AVAILABLE) { 8196c27377SValentina Manea dev_err(dev, "not ready\n"); 8296c27377SValentina Manea goto err; 8396c27377SValentina Manea } 8496c27377SValentina Manea 8596c27377SValentina Manea socket = sockfd_lookup(sockfd, &err); 8696c27377SValentina Manea if (!socket) 8796c27377SValentina Manea goto err; 8896c27377SValentina Manea 8996c27377SValentina Manea sdev->ud.tcp_socket = socket; 9096c27377SValentina Manea 9196c27377SValentina Manea spin_unlock_irq(&sdev->ud.lock); 9296c27377SValentina Manea 9396c27377SValentina Manea sdev->ud.tcp_rx = kthread_get_run(stub_rx_loop, &sdev->ud, 9496c27377SValentina Manea "stub_rx"); 9596c27377SValentina Manea sdev->ud.tcp_tx = kthread_get_run(stub_tx_loop, &sdev->ud, 9696c27377SValentina Manea "stub_tx"); 9796c27377SValentina Manea 9896c27377SValentina Manea spin_lock_irq(&sdev->ud.lock); 9996c27377SValentina Manea sdev->ud.status = SDEV_ST_USED; 10096c27377SValentina Manea spin_unlock_irq(&sdev->ud.lock); 10196c27377SValentina Manea 10296c27377SValentina Manea } else { 10396c27377SValentina Manea dev_info(dev, "stub down\n"); 10496c27377SValentina Manea 10596c27377SValentina Manea spin_lock_irq(&sdev->ud.lock); 10696c27377SValentina Manea if (sdev->ud.status != SDEV_ST_USED) 10796c27377SValentina Manea goto err; 10896c27377SValentina Manea 10996c27377SValentina Manea spin_unlock_irq(&sdev->ud.lock); 11096c27377SValentina Manea 11196c27377SValentina Manea usbip_event_add(&sdev->ud, SDEV_EVENT_DOWN); 11296c27377SValentina Manea } 11396c27377SValentina Manea 11496c27377SValentina Manea return count; 11596c27377SValentina Manea 11696c27377SValentina Manea err: 11796c27377SValentina Manea spin_unlock_irq(&sdev->ud.lock); 11896c27377SValentina Manea return -EINVAL; 11996c27377SValentina Manea } 12096c27377SValentina Manea static DEVICE_ATTR(usbip_sockfd, S_IWUSR, NULL, store_sockfd); 12196c27377SValentina Manea 12296c27377SValentina Manea static int stub_add_files(struct device *dev) 12396c27377SValentina Manea { 12496c27377SValentina Manea int err = 0; 12596c27377SValentina Manea 12696c27377SValentina Manea err = device_create_file(dev, &dev_attr_usbip_status); 12796c27377SValentina Manea if (err) 12896c27377SValentina Manea goto err_status; 12996c27377SValentina Manea 13096c27377SValentina Manea err = device_create_file(dev, &dev_attr_usbip_sockfd); 13196c27377SValentina Manea if (err) 13296c27377SValentina Manea goto err_sockfd; 13396c27377SValentina Manea 13496c27377SValentina Manea err = device_create_file(dev, &dev_attr_usbip_debug); 13596c27377SValentina Manea if (err) 13696c27377SValentina Manea goto err_debug; 13796c27377SValentina Manea 13896c27377SValentina Manea return 0; 13996c27377SValentina Manea 14096c27377SValentina Manea err_debug: 14196c27377SValentina Manea device_remove_file(dev, &dev_attr_usbip_sockfd); 14296c27377SValentina Manea err_sockfd: 14396c27377SValentina Manea device_remove_file(dev, &dev_attr_usbip_status); 14496c27377SValentina Manea err_status: 14596c27377SValentina Manea return err; 14696c27377SValentina Manea } 14796c27377SValentina Manea 14896c27377SValentina Manea static void stub_remove_files(struct device *dev) 14996c27377SValentina Manea { 15096c27377SValentina Manea device_remove_file(dev, &dev_attr_usbip_status); 15196c27377SValentina Manea device_remove_file(dev, &dev_attr_usbip_sockfd); 15296c27377SValentina Manea device_remove_file(dev, &dev_attr_usbip_debug); 15396c27377SValentina Manea } 15496c27377SValentina Manea 15596c27377SValentina Manea static void stub_shutdown_connection(struct usbip_device *ud) 15696c27377SValentina Manea { 15796c27377SValentina Manea struct stub_device *sdev = container_of(ud, struct stub_device, ud); 15896c27377SValentina Manea 15996c27377SValentina Manea /* 16096c27377SValentina Manea * When removing an exported device, kernel panic sometimes occurred 16196c27377SValentina Manea * and then EIP was sk_wait_data of stub_rx thread. Is this because 16296c27377SValentina Manea * sk_wait_data returned though stub_rx thread was already finished by 16396c27377SValentina Manea * step 1? 16496c27377SValentina Manea */ 16596c27377SValentina Manea if (ud->tcp_socket) { 16696c27377SValentina Manea dev_dbg(&sdev->udev->dev, "shutdown tcp_socket %p\n", 16796c27377SValentina Manea ud->tcp_socket); 16896c27377SValentina Manea kernel_sock_shutdown(ud->tcp_socket, SHUT_RDWR); 16996c27377SValentina Manea } 17096c27377SValentina Manea 17196c27377SValentina Manea /* 1. stop threads */ 17296c27377SValentina Manea if (ud->tcp_rx) { 17396c27377SValentina Manea kthread_stop_put(ud->tcp_rx); 17496c27377SValentina Manea ud->tcp_rx = NULL; 17596c27377SValentina Manea } 17696c27377SValentina Manea if (ud->tcp_tx) { 17796c27377SValentina Manea kthread_stop_put(ud->tcp_tx); 17896c27377SValentina Manea ud->tcp_tx = NULL; 17996c27377SValentina Manea } 18096c27377SValentina Manea 18196c27377SValentina Manea /* 18296c27377SValentina Manea * 2. close the socket 18396c27377SValentina Manea * 18496c27377SValentina Manea * tcp_socket is freed after threads are killed so that usbip_xmit does 18596c27377SValentina Manea * not touch NULL socket. 18696c27377SValentina Manea */ 18796c27377SValentina Manea if (ud->tcp_socket) { 18896c27377SValentina Manea sockfd_put(ud->tcp_socket); 18996c27377SValentina Manea ud->tcp_socket = NULL; 19096c27377SValentina Manea } 19196c27377SValentina Manea 19296c27377SValentina Manea /* 3. free used data */ 19396c27377SValentina Manea stub_device_cleanup_urbs(sdev); 19496c27377SValentina Manea 19596c27377SValentina Manea /* 4. free stub_unlink */ 19696c27377SValentina Manea { 19796c27377SValentina Manea unsigned long flags; 19896c27377SValentina Manea struct stub_unlink *unlink, *tmp; 19996c27377SValentina Manea 20096c27377SValentina Manea spin_lock_irqsave(&sdev->priv_lock, flags); 20196c27377SValentina Manea list_for_each_entry_safe(unlink, tmp, &sdev->unlink_tx, list) { 20296c27377SValentina Manea list_del(&unlink->list); 20396c27377SValentina Manea kfree(unlink); 20496c27377SValentina Manea } 20596c27377SValentina Manea list_for_each_entry_safe(unlink, tmp, &sdev->unlink_free, 20696c27377SValentina Manea list) { 20796c27377SValentina Manea list_del(&unlink->list); 20896c27377SValentina Manea kfree(unlink); 20996c27377SValentina Manea } 21096c27377SValentina Manea spin_unlock_irqrestore(&sdev->priv_lock, flags); 21196c27377SValentina Manea } 21296c27377SValentina Manea } 21396c27377SValentina Manea 21496c27377SValentina Manea static void stub_device_reset(struct usbip_device *ud) 21596c27377SValentina Manea { 21696c27377SValentina Manea struct stub_device *sdev = container_of(ud, struct stub_device, ud); 21796c27377SValentina Manea struct usb_device *udev = sdev->udev; 21896c27377SValentina Manea int ret; 21996c27377SValentina Manea 22096c27377SValentina Manea dev_dbg(&udev->dev, "device reset"); 22196c27377SValentina Manea 22296c27377SValentina Manea ret = usb_lock_device_for_reset(udev, sdev->interface); 22396c27377SValentina Manea if (ret < 0) { 22496c27377SValentina Manea dev_err(&udev->dev, "lock for reset\n"); 22596c27377SValentina Manea spin_lock_irq(&ud->lock); 22696c27377SValentina Manea ud->status = SDEV_ST_ERROR; 22796c27377SValentina Manea spin_unlock_irq(&ud->lock); 22896c27377SValentina Manea return; 22996c27377SValentina Manea } 23096c27377SValentina Manea 23196c27377SValentina Manea /* try to reset the device */ 23296c27377SValentina Manea ret = usb_reset_device(udev); 23396c27377SValentina Manea usb_unlock_device(udev); 23496c27377SValentina Manea 23596c27377SValentina Manea spin_lock_irq(&ud->lock); 23696c27377SValentina Manea if (ret) { 23796c27377SValentina Manea dev_err(&udev->dev, "device reset\n"); 23896c27377SValentina Manea ud->status = SDEV_ST_ERROR; 23996c27377SValentina Manea } else { 24096c27377SValentina Manea dev_info(&udev->dev, "device reset\n"); 24196c27377SValentina Manea ud->status = SDEV_ST_AVAILABLE; 24296c27377SValentina Manea } 24396c27377SValentina Manea spin_unlock_irq(&ud->lock); 24496c27377SValentina Manea } 24596c27377SValentina Manea 24696c27377SValentina Manea static void stub_device_unusable(struct usbip_device *ud) 24796c27377SValentina Manea { 24896c27377SValentina Manea spin_lock_irq(&ud->lock); 24996c27377SValentina Manea ud->status = SDEV_ST_ERROR; 25096c27377SValentina Manea spin_unlock_irq(&ud->lock); 25196c27377SValentina Manea } 25296c27377SValentina Manea 25396c27377SValentina Manea /** 25496c27377SValentina Manea * stub_device_alloc - allocate a new stub_device struct 25596c27377SValentina Manea * @interface: usb_interface of a new device 25696c27377SValentina Manea * 25796c27377SValentina Manea * Allocates and initializes a new stub_device struct. 25896c27377SValentina Manea */ 25996c27377SValentina Manea static struct stub_device *stub_device_alloc(struct usb_device *udev) 26096c27377SValentina Manea { 26196c27377SValentina Manea struct stub_device *sdev; 26296c27377SValentina Manea int busnum = udev->bus->busnum; 26396c27377SValentina Manea int devnum = udev->devnum; 26496c27377SValentina Manea 26596c27377SValentina Manea dev_dbg(&udev->dev, "allocating stub device"); 26696c27377SValentina Manea 26796c27377SValentina Manea /* yes, it's a new device */ 26896c27377SValentina Manea sdev = kzalloc(sizeof(struct stub_device), GFP_KERNEL); 26996c27377SValentina Manea if (!sdev) 27096c27377SValentina Manea return NULL; 27196c27377SValentina Manea 27296c27377SValentina Manea sdev->udev = usb_get_dev(udev); 27396c27377SValentina Manea 27496c27377SValentina Manea /* 27596c27377SValentina Manea * devid is defined with devnum when this driver is first allocated. 27696c27377SValentina Manea * devnum may change later if a device is reset. However, devid never 27796c27377SValentina Manea * changes during a usbip connection. 27896c27377SValentina Manea */ 27996c27377SValentina Manea sdev->devid = (busnum << 16) | devnum; 28096c27377SValentina Manea sdev->ud.side = USBIP_STUB; 28196c27377SValentina Manea sdev->ud.status = SDEV_ST_AVAILABLE; 28296c27377SValentina Manea spin_lock_init(&sdev->ud.lock); 28396c27377SValentina Manea sdev->ud.tcp_socket = NULL; 28496c27377SValentina Manea 28596c27377SValentina Manea INIT_LIST_HEAD(&sdev->priv_init); 28696c27377SValentina Manea INIT_LIST_HEAD(&sdev->priv_tx); 28796c27377SValentina Manea INIT_LIST_HEAD(&sdev->priv_free); 28896c27377SValentina Manea INIT_LIST_HEAD(&sdev->unlink_free); 28996c27377SValentina Manea INIT_LIST_HEAD(&sdev->unlink_tx); 29096c27377SValentina Manea spin_lock_init(&sdev->priv_lock); 29196c27377SValentina Manea 29296c27377SValentina Manea init_waitqueue_head(&sdev->tx_waitq); 29396c27377SValentina Manea 29496c27377SValentina Manea sdev->ud.eh_ops.shutdown = stub_shutdown_connection; 29596c27377SValentina Manea sdev->ud.eh_ops.reset = stub_device_reset; 29696c27377SValentina Manea sdev->ud.eh_ops.unusable = stub_device_unusable; 29796c27377SValentina Manea 29896c27377SValentina Manea usbip_start_eh(&sdev->ud); 29996c27377SValentina Manea 30096c27377SValentina Manea dev_dbg(&udev->dev, "register new device\n"); 30196c27377SValentina Manea 30296c27377SValentina Manea return sdev; 30396c27377SValentina Manea } 30496c27377SValentina Manea 30596c27377SValentina Manea static void stub_device_free(struct stub_device *sdev) 30696c27377SValentina Manea { 30796c27377SValentina Manea kfree(sdev); 30896c27377SValentina Manea } 30996c27377SValentina Manea 31096c27377SValentina Manea static int stub_probe(struct usb_device *udev) 31196c27377SValentina Manea { 31296c27377SValentina Manea struct stub_device *sdev = NULL; 31396c27377SValentina Manea const char *udev_busid = dev_name(&udev->dev); 31496c27377SValentina Manea struct bus_id_priv *busid_priv; 31596c27377SValentina Manea int rc; 31696c27377SValentina Manea 31796c27377SValentina Manea dev_dbg(&udev->dev, "Enter\n"); 31896c27377SValentina Manea 31996c27377SValentina Manea /* check we should claim or not by busid_table */ 32096c27377SValentina Manea busid_priv = get_busid_priv(udev_busid); 32196c27377SValentina Manea if (!busid_priv || (busid_priv->status == STUB_BUSID_REMOV) || 32296c27377SValentina Manea (busid_priv->status == STUB_BUSID_OTHER)) { 32396c27377SValentina Manea dev_info(&udev->dev, 32496c27377SValentina Manea "%s is not in match_busid table... skip!\n", 32596c27377SValentina Manea udev_busid); 32696c27377SValentina Manea 32796c27377SValentina Manea /* 32896c27377SValentina Manea * Return value should be ENODEV or ENOXIO to continue trying 32996c27377SValentina Manea * other matched drivers by the driver core. 33096c27377SValentina Manea * See driver_probe_device() in driver/base/dd.c 33196c27377SValentina Manea */ 33296c27377SValentina Manea return -ENODEV; 33396c27377SValentina Manea } 33496c27377SValentina Manea 33596c27377SValentina Manea if (udev->descriptor.bDeviceClass == USB_CLASS_HUB) { 33696c27377SValentina Manea dev_dbg(&udev->dev, "%s is a usb hub device... skip!\n", 33796c27377SValentina Manea udev_busid); 33896c27377SValentina Manea return -ENODEV; 33996c27377SValentina Manea } 34096c27377SValentina Manea 34196c27377SValentina Manea if (!strcmp(udev->bus->bus_name, "vhci_hcd")) { 34296c27377SValentina Manea dev_dbg(&udev->dev, 34396c27377SValentina Manea "%s is attached on vhci_hcd... skip!\n", 34496c27377SValentina Manea udev_busid); 34596c27377SValentina Manea 34696c27377SValentina Manea return -ENODEV; 34796c27377SValentina Manea } 34896c27377SValentina Manea 34996c27377SValentina Manea /* ok, this is my device */ 35096c27377SValentina Manea sdev = stub_device_alloc(udev); 35196c27377SValentina Manea if (!sdev) 35296c27377SValentina Manea return -ENOMEM; 35396c27377SValentina Manea 35496c27377SValentina Manea dev_info(&udev->dev, 35596c27377SValentina Manea "usbip-host: register new device (bus %u dev %u)\n", 35696c27377SValentina Manea udev->bus->busnum, udev->devnum); 35796c27377SValentina Manea 35896c27377SValentina Manea busid_priv->shutdown_busid = 0; 35996c27377SValentina Manea 36096c27377SValentina Manea /* set private data to usb_device */ 36196c27377SValentina Manea dev_set_drvdata(&udev->dev, sdev); 36296c27377SValentina Manea busid_priv->sdev = sdev; 36396c27377SValentina Manea busid_priv->udev = udev; 36496c27377SValentina Manea 36596c27377SValentina Manea /* 36696c27377SValentina Manea * Claim this hub port. 36796c27377SValentina Manea * It doesn't matter what value we pass as owner 36896c27377SValentina Manea * (struct dev_state) as long as it is unique. 36996c27377SValentina Manea */ 37096c27377SValentina Manea rc = usb_hub_claim_port(udev->parent, udev->portnum, 37196c27377SValentina Manea (struct usb_dev_state *) udev); 37296c27377SValentina Manea if (rc) { 37396c27377SValentina Manea dev_dbg(&udev->dev, "unable to claim port\n"); 3743ff67445SAlexey Khoroshilov goto err_port; 37596c27377SValentina Manea } 37696c27377SValentina Manea 3773ff67445SAlexey Khoroshilov rc = stub_add_files(&udev->dev); 3783ff67445SAlexey Khoroshilov if (rc) { 37996c27377SValentina Manea dev_err(&udev->dev, "stub_add_files for %s\n", udev_busid); 3803ff67445SAlexey Khoroshilov goto err_files; 3813ff67445SAlexey Khoroshilov } 3823ff67445SAlexey Khoroshilov busid_priv->status = STUB_BUSID_ALLOC; 3833ff67445SAlexey Khoroshilov 3843ff67445SAlexey Khoroshilov return 0; 3853ff67445SAlexey Khoroshilov err_files: 3863ff67445SAlexey Khoroshilov usb_hub_release_port(udev->parent, udev->portnum, 3873ff67445SAlexey Khoroshilov (struct usb_dev_state *) udev); 3883ff67445SAlexey Khoroshilov err_port: 38996c27377SValentina Manea dev_set_drvdata(&udev->dev, NULL); 39096c27377SValentina Manea usb_put_dev(udev); 39196c27377SValentina Manea kthread_stop_put(sdev->ud.eh); 39296c27377SValentina Manea 39396c27377SValentina Manea busid_priv->sdev = NULL; 39496c27377SValentina Manea stub_device_free(sdev); 3953ff67445SAlexey Khoroshilov return rc; 39696c27377SValentina Manea } 39796c27377SValentina Manea 39896c27377SValentina Manea static void shutdown_busid(struct bus_id_priv *busid_priv) 39996c27377SValentina Manea { 40096c27377SValentina Manea if (busid_priv->sdev && !busid_priv->shutdown_busid) { 40196c27377SValentina Manea busid_priv->shutdown_busid = 1; 40296c27377SValentina Manea usbip_event_add(&busid_priv->sdev->ud, SDEV_EVENT_REMOVED); 40396c27377SValentina Manea 40496c27377SValentina Manea /* wait for the stop of the event handler */ 40596c27377SValentina Manea usbip_stop_eh(&busid_priv->sdev->ud); 40696c27377SValentina Manea } 40796c27377SValentina Manea } 40896c27377SValentina Manea 40996c27377SValentina Manea /* 41096c27377SValentina Manea * called in usb_disconnect() or usb_deregister() 41196c27377SValentina Manea * but only if actconfig(active configuration) exists 41296c27377SValentina Manea */ 41396c27377SValentina Manea static void stub_disconnect(struct usb_device *udev) 41496c27377SValentina Manea { 41596c27377SValentina Manea struct stub_device *sdev; 41696c27377SValentina Manea const char *udev_busid = dev_name(&udev->dev); 41796c27377SValentina Manea struct bus_id_priv *busid_priv; 41896c27377SValentina Manea int rc; 41996c27377SValentina Manea 42096c27377SValentina Manea dev_dbg(&udev->dev, "Enter\n"); 42196c27377SValentina Manea 42296c27377SValentina Manea busid_priv = get_busid_priv(udev_busid); 42396c27377SValentina Manea if (!busid_priv) { 42496c27377SValentina Manea BUG(); 42596c27377SValentina Manea return; 42696c27377SValentina Manea } 42796c27377SValentina Manea 42896c27377SValentina Manea sdev = dev_get_drvdata(&udev->dev); 42996c27377SValentina Manea 43096c27377SValentina Manea /* get stub_device */ 43196c27377SValentina Manea if (!sdev) { 43296c27377SValentina Manea dev_err(&udev->dev, "could not get device"); 43396c27377SValentina Manea return; 43496c27377SValentina Manea } 43596c27377SValentina Manea 43696c27377SValentina Manea dev_set_drvdata(&udev->dev, NULL); 43796c27377SValentina Manea 43896c27377SValentina Manea /* 43996c27377SValentina Manea * NOTE: rx/tx threads are invoked for each usb_device. 44096c27377SValentina Manea */ 44196c27377SValentina Manea stub_remove_files(&udev->dev); 44296c27377SValentina Manea 44396c27377SValentina Manea /* release port */ 44496c27377SValentina Manea rc = usb_hub_release_port(udev->parent, udev->portnum, 44596c27377SValentina Manea (struct usb_dev_state *) udev); 44696c27377SValentina Manea if (rc) { 44796c27377SValentina Manea dev_dbg(&udev->dev, "unable to release port\n"); 44896c27377SValentina Manea return; 44996c27377SValentina Manea } 45096c27377SValentina Manea 45196c27377SValentina Manea /* If usb reset is called from event handler */ 45296c27377SValentina Manea if (busid_priv->sdev->ud.eh == current) 45396c27377SValentina Manea return; 45496c27377SValentina Manea 45596c27377SValentina Manea /* shutdown the current connection */ 45696c27377SValentina Manea shutdown_busid(busid_priv); 45796c27377SValentina Manea 45896c27377SValentina Manea usb_put_dev(sdev->udev); 45996c27377SValentina Manea 46096c27377SValentina Manea /* free sdev */ 46196c27377SValentina Manea busid_priv->sdev = NULL; 46296c27377SValentina Manea stub_device_free(sdev); 46396c27377SValentina Manea 46496c27377SValentina Manea if (busid_priv->status == STUB_BUSID_ALLOC) { 46596c27377SValentina Manea busid_priv->status = STUB_BUSID_ADDED; 46696c27377SValentina Manea } else { 46796c27377SValentina Manea busid_priv->status = STUB_BUSID_OTHER; 46896c27377SValentina Manea del_match_busid((char *)udev_busid); 46996c27377SValentina Manea } 47096c27377SValentina Manea } 47196c27377SValentina Manea 47296c27377SValentina Manea #ifdef CONFIG_PM 47396c27377SValentina Manea 47496c27377SValentina Manea /* These functions need usb_port_suspend and usb_port_resume, 47596c27377SValentina Manea * which reside in drivers/usb/core/usb.h. Skip for now. */ 47696c27377SValentina Manea 47796c27377SValentina Manea static int stub_suspend(struct usb_device *udev, pm_message_t message) 47896c27377SValentina Manea { 47996c27377SValentina Manea dev_dbg(&udev->dev, "stub_suspend\n"); 48096c27377SValentina Manea 48196c27377SValentina Manea return 0; 48296c27377SValentina Manea } 48396c27377SValentina Manea 48496c27377SValentina Manea static int stub_resume(struct usb_device *udev, pm_message_t message) 48596c27377SValentina Manea { 48696c27377SValentina Manea dev_dbg(&udev->dev, "stub_resume\n"); 48796c27377SValentina Manea 48896c27377SValentina Manea return 0; 48996c27377SValentina Manea } 49096c27377SValentina Manea 49196c27377SValentina Manea #endif /* CONFIG_PM */ 49296c27377SValentina Manea 49396c27377SValentina Manea struct usb_device_driver stub_driver = { 49496c27377SValentina Manea .name = "usbip-host", 49596c27377SValentina Manea .probe = stub_probe, 49696c27377SValentina Manea .disconnect = stub_disconnect, 49796c27377SValentina Manea #ifdef CONFIG_PM 49896c27377SValentina Manea .suspend = stub_suspend, 49996c27377SValentina Manea .resume = stub_resume, 50096c27377SValentina Manea #endif 50196c27377SValentina Manea .supports_autosuspend = 0, 50296c27377SValentina Manea }; 503