void gobi_usbnet_tx_timeout_3_0_6 (struct net_device *net) { struct usbnet *dev = netdev_priv(net); #ifdef TX_URB_MONITOR int count = 0; int iRet = -1; unsigned char b_usb_if_num = 0; // Get the USB interface iRet = get_usb_interface_from_device (dev, &b_usb_if_num); count = unlink_urbs (dev, &dev->txq); tasklet_schedule (&dev->bh); if ((URB_monitor) && (0==iRet)) { while (count) { URB_monitor(false, b_usb_if_num); count--; } } #else // TX_URB_MONITOR unlink_urbs (dev, &dev->txq); tasklet_schedule (&dev->bh); #endif // TX_URB_MONITOR // FIXME: device recovery -- reset? }
// precondition: never called in_interrupt static void usbnet_terminate_urbs(struct usbnet *dev) { DECLARE_WAIT_QUEUE_HEAD_ONSTACK(unlink_wakeup); DECLARE_WAITQUEUE(wait, current); int temp; /* ensure there are no more active urbs */ add_wait_queue(&unlink_wakeup, &wait); set_current_state(TASK_UNINTERRUPTIBLE); dev->wait = &unlink_wakeup; temp = unlink_urbs(dev, &dev->txq) + unlink_urbs(dev, &dev->rxq); /* maybe wait for deletions to finish. */ while (!skb_queue_empty(&dev->rxq) && !skb_queue_empty(&dev->txq) && !skb_queue_empty(&dev->done)) { schedule_timeout(UNLINK_TIMEOUT_MS); set_current_state(TASK_UNINTERRUPTIBLE); netif_dbg(dev, ifdown, dev->net, "waited for %d urb completions\n", temp); } set_current_state(TASK_RUNNING); dev->wait = NULL; remove_wait_queue(&unlink_wakeup, &wait); }
int usbnet_suspend (struct usb_interface *intf, pm_message_t message) { struct usbnet *dev = usb_get_intfdata(intf); if (!dev->suspend_count++) { /* accelerate emptying of the rx and queues, to avoid * having everything error out. */ netif_device_detach (dev->net); (void) unlink_urbs (dev, &dev->rxq); (void) unlink_urbs (dev, &dev->txq); } return 0; }
void usbnet_unlink_rx_urbs(struct usbnet *dev) { if (netif_running(dev->net)) { (void) unlink_urbs (dev, &dev->rxq); tasklet_schedule(&dev->bh); } }
void usbnet_unlink_rx_urbs(struct usbnet *dev) { if (netif_running(dev->net)) { (void) unlink_urbs (dev, &dev->rxq); queue_work(usbnet_wq, &dev->bh_w); } }
void usbnet_tx_timeout (struct net_device *net) { struct usbnet *dev = netdev_priv(net); unlink_urbs (dev, &dev->txq); tasklet_schedule (&dev->bh); // FIXME: device recovery -- reset? }
void usbnet_tx_timeout (struct net_device *net) { struct usbnet *dev = netdev_priv(net); unlink_urbs (dev, &dev->txq); queue_work(usbnet_wq, &dev->bh_w); // FIXME: device recovery -- reset? }
static int usbnet_stop (struct net_device *net) { struct usbnet *dev = netdev_priv(net); int temp; DECLARE_WAIT_QUEUE_HEAD_ONSTACK (unlink_wakeup); DECLARE_WAITQUEUE (wait, current); netif_stop_queue (net); if (netif_msg_ifdown (dev)) devinfo (dev, "stop stats: rx/tx %ld/%ld, errs %ld/%ld", dev->stats.rx_packets, dev->stats.tx_packets, dev->stats.rx_errors, dev->stats.tx_errors ); // ensure there are no more active urbs add_wait_queue (&unlink_wakeup, &wait); dev->wait = &unlink_wakeup; temp = unlink_urbs (dev, &dev->txq) + unlink_urbs (dev, &dev->rxq); // maybe wait for deletions to finish. while (!skb_queue_empty(&dev->rxq) && !skb_queue_empty(&dev->txq) && !skb_queue_empty(&dev->done)) { msleep(UNLINK_TIMEOUT_MS); if (netif_msg_ifdown (dev)) devdbg (dev, "waited for %d urb completions", temp); } dev->wait = NULL; remove_wait_queue (&unlink_wakeup, &wait); usb_kill_urb(dev->interrupt); /* deferred work (task, timer, softirq) must also stop. * can't flush_scheduled_work() until we drop rtnl (later), * else workers could deadlock; so make workers a NOP. */ dev->flags = 0; del_timer_sync (&dev->delay); tasklet_kill (&dev->bh); return 0; }
int usbnet_suspend (struct usb_interface *intf, pm_message_t message) { struct usbnet *dev = usb_get_intfdata(intf); if (!dev->suspend_count++) { #if defined(CONFIG_ERICSSON_F3307_ENABLE) spin_lock_irq(&dev->txq.lock); /* don't autosuspend while transmitting */ if (dev->txq.qlen && (message.event & PM_EVENT_AUTO)) { spin_unlock_irq(&dev->txq.lock); return -EBUSY; } else { set_bit(EVENT_DEV_ASLEEP, &dev->flags); spin_unlock_irq(&dev->txq.lock); } #endif /* * accelerate emptying of the rx and queues, to avoid * having everything error out. */ netif_device_detach (dev->net); #if !defined(CONFIG_ERICSSON_F3307_ENABLE) (void) unlink_urbs (dev, &dev->rxq); (void) unlink_urbs (dev, &dev->txq); #else usbnet_terminate_urbs(dev); usb_kill_urb(dev->interrupt); #endif /* * reattach so runtime management can use and * wake the device */ netif_device_attach (dev->net); } return 0; }
static void suspend_timeout(unsigned long data) { #ifdef CONFIG_NO_USB_SUSPEND_RESUME return; #else #ifdef CONFIG_DSPLOG_USB /* This will prevent the case that suspend port when doing dsplog. this is a temporary solution for the case of dsplog and ipc function simultaneously. */ if(dsplog_active) return; #endif if(!usb_host_resumed) { printk("\n!!!suspend timer has been started. however host not resumed\n"); return; } if( !(UHCRHPS3 & 0x2)) { printk("\n suspend_timeout:port has been disabled.\n"); return; } if((bvd_ipc->suspend_flag == 1)) { bvd_ipc->suspend_flag = 0; mod_timer(&suspend_timer, jiffies+(IPC_USB_SUSPEND_INTERVAL*HZ/1000)); bvd_dbg("suspend_timeout: add the suspend timer again"); }else { unlink_urbs(&bvd_ipc->readurb_mux); clear_BLE(); mdelay(1); UHCRHPS3 = 0x4; bvd_dbg("suspend_timeout: send SUSPEND cmd! UHCRHPS3=0x%x\n", UHCRHPS3); while(!(UHCRHPS3 & 0x4)) mdelay(1); // ipc_traffic = 0; host_port_suspended = 1; printk("ipc-suspend\n"); if(in_bprdy_interrupt()) clear_in_bprdy_interrupt(); } #endif }
/* work that cannot be done in interrupt context uses keventd. * * NOTE: with 2.5 we could do more of this using completion callbacks, * especially now that control transfers can be queued. */ static void kevent (struct work_struct *work) { struct usbnet *dev = container_of(work, struct usbnet, kevent); int status; /* usb_clear_halt() needs a thread context */ if (test_bit (EVENT_TX_HALT, &dev->flags)) { unlink_urbs (dev, &dev->txq); status = usb_autopm_get_interface(dev->intf); if (status < 0) goto fail_pipe; status = usb_clear_halt (dev->udev, dev->out); usb_autopm_put_interface(dev->intf); if (status < 0 && status != -EPIPE && status != -ESHUTDOWN) { if (netif_msg_tx_err (dev)) fail_pipe: netdev_err(dev->net, "can't clear tx halt, status %d\n", status); } else { clear_bit (EVENT_TX_HALT, &dev->flags); if (status != -ESHUTDOWN) netif_wake_queue (dev->net); } } if (test_bit (EVENT_RX_HALT, &dev->flags)) { unlink_urbs (dev, &dev->rxq); status = usb_autopm_get_interface(dev->intf); if (status < 0) goto fail_halt; status = usb_clear_halt (dev->udev, dev->in); usb_autopm_put_interface(dev->intf); if (status < 0 && status != -EPIPE && status != -ESHUTDOWN) { if (netif_msg_rx_err (dev)) fail_halt: netdev_err(dev->net, "can't clear rx halt, status %d\n", status); } else { clear_bit (EVENT_RX_HALT, &dev->flags); tasklet_schedule (&dev->bh); } } /* tasklet could resubmit itself forever if memory is tight */ if (test_bit (EVENT_RX_MEMORY, &dev->flags)) { struct urb *urb = NULL; if (netif_running (dev->net)) urb = usb_alloc_urb (0, GFP_KERNEL); else clear_bit (EVENT_RX_MEMORY, &dev->flags); if (urb != NULL) { clear_bit (EVENT_RX_MEMORY, &dev->flags); status = usb_autopm_get_interface(dev->intf); if (status < 0) goto fail_lowmem; rx_submit (dev, urb, GFP_KERNEL); usb_autopm_put_interface(dev->intf); fail_lowmem: tasklet_schedule (&dev->bh); } } if (test_bit (EVENT_LINK_RESET, &dev->flags)) { struct driver_info *info = dev->driver_info; int retval = 0; clear_bit (EVENT_LINK_RESET, &dev->flags); status = usb_autopm_get_interface(dev->intf); if (status < 0) goto skip_reset; if(info->link_reset && (retval = info->link_reset(dev)) < 0) { usb_autopm_put_interface(dev->intf); skip_reset: netdev_info(dev->net, "link reset failed (%d) usbnet usb-%s-%s, %s\n", retval, dev->udev->bus->bus_name, dev->udev->devpath, info->description); } else { usb_autopm_put_interface(dev->intf); } } if (dev->flags) netdev_dbg(dev->net, "kevent done, flags = 0x%lx\n", dev->flags); }
static void kevent(void *data) { struct usbnet *dev = (struct usbnet *)data; #else static void kevent(struct work_struct *work) { struct usbnet *dev = container_of(work, struct usbnet, kevent); #endif int status; /* usb_clear_halt() needs a thread context */ if (test_bit(EVENT_TX_HALT, &dev->flags)) { unlink_urbs(dev, &dev->txq); status = usb_clear_halt(dev->udev, dev->out); if (status < 0 && status != -EPIPE && status != -ESHUTDOWN) { if (netif_msg_tx_err(dev)) deverr(dev, "can't clear tx halt, status %d", status); } else { clear_bit(EVENT_TX_HALT, &dev->flags); if (status != -ESHUTDOWN) netif_wake_queue(dev->net); } } if (test_bit(EVENT_RX_HALT, &dev->flags)) { unlink_urbs(dev, &dev->rxq); status = usb_clear_halt(dev->udev, dev->in); if (status < 0 && status != -EPIPE && status != -ESHUTDOWN) { if (netif_msg_rx_err(dev)) deverr(dev, "can't clear rx halt, status %d", status); } else { clear_bit(EVENT_RX_HALT, &dev->flags); tasklet_schedule(&dev->bh); } } /* tasklet could resubmit itself forever if memory is tight */ if (test_bit(EVENT_RX_MEMORY, &dev->flags)) { struct urb *urb = NULL; if (netif_running(dev->net)) urb = usb_alloc_urb(0, GFP_KERNEL); else clear_bit(EVENT_RX_MEMORY, &dev->flags); if (urb != NULL) { clear_bit(EVENT_RX_MEMORY, &dev->flags); #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 14) urb->transfer_flags |= URB_ASYNC_UNLINK; #endif rx_submit(dev, urb, GFP_KERNEL); tasklet_schedule(&dev->bh); } } if (test_bit(EVENT_LINK_RESET, &dev->flags)) { struct driver_info *info = dev->driver_info; int retval = 0; clear_bit(EVENT_LINK_RESET, &dev->flags); if (info->link_reset) { retval = info->link_reset(dev); if (retval < 0) { devinfo(dev, "link reset failed (%d) usbnet usb-%s-%s, %s", retval, dev->udev->bus->bus_name, dev->udev->devpath, info->description); } } } if (dev->flags) devdbg(dev, "kevent done, flags = 0x%lx", dev->flags); } /*-------------------------------------------------------------------------*/ #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19) static void tx_complete(struct urb *urb, struct pt_regs *regs) #else static void tx_complete(struct urb *urb) #endif { struct sk_buff *skb = (struct sk_buff *) urb->context; struct skb_data *entry = (struct skb_data *) skb->cb; struct usbnet *dev = entry->dev; if (urb->status == 0) { dev->stats.tx_packets++; dev->stats.tx_bytes += entry->length; } else { dev->stats.tx_errors++; switch (urb->status) { case -EPIPE: axusbnet_defer_kevent(dev, EVENT_TX_HALT); break; /* software-driven interface shutdown */ case -ECONNRESET: /* async unlink */ case -ESHUTDOWN: /* hardware gone */ break; /* like rx, tx gets controller i/o faults during khubd delays */ /* and so it uses the same throttling mechanism. */ case -EPROTO: case -ETIME: case -EILSEQ: if (!timer_pending(&dev->delay)) { mod_timer(&dev->delay, jiffies + THROTTLE_JIFFIES); if (netif_msg_link(dev)) devdbg(dev, "tx throttle %d", urb->status); } netif_stop_queue(dev->net); break; default: if (netif_msg_tx_err(dev)) devdbg(dev, "tx err %d", entry->urb->status); break; } } urb->dev = NULL; entry->state = tx_done; defer_bh(dev, skb, &dev->txq); } /*-------------------------------------------------------------------------*/ static void axusbnet_tx_timeout(struct net_device *net) { struct usbnet *dev = netdev_priv(net); unlink_urbs(dev, &dev->txq); tasklet_schedule(&dev->bh); /* FIXME: device recovery -- reset? */ } /*-------------------------------------------------------------------------*/ #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 32) static int #else static netdev_tx_t #endif axusbnet_start_xmit(struct sk_buff *skb, struct net_device *net) { struct usbnet *dev = netdev_priv(net); int length; struct urb *urb = NULL; struct skb_data *entry; struct driver_info *info = dev->driver_info; unsigned long flags; int retval; /* some devices want funky USB-level framing, for */ /* win32 driver (usually) and/or hardware quirks */ if (info->tx_fixup) { skb = info->tx_fixup(dev, skb, GFP_ATOMIC); if (!skb) { if (netif_msg_tx_err(dev)) devdbg(dev, "can't tx_fixup skb"); goto drop; } } length = skb->len; urb = usb_alloc_urb(0, GFP_ATOMIC); if (!urb) { if (netif_msg_tx_err(dev)) devdbg(dev, "no urb"); goto drop; } entry = (struct skb_data *) skb->cb; entry->urb = urb; entry->dev = dev; entry->state = tx_start; entry->length = length; usb_fill_bulk_urb(urb, dev->udev, dev->out, skb->data, skb->len, tx_complete, skb); /* don't assume the hardware handles USB_ZERO_PACKET * NOTE: strictly conforming cdc-ether devices should expect * the ZLP here, but ignore the one-byte packet. */ if (!(info->flags & FLAG_SEND_ZLP) && (length % dev->maxpacket) == 0) { urb->transfer_buffer_length++; if (skb_tailroom(skb)) { skb->data[skb->len] = 0; __skb_put(skb, 1); } } spin_lock_irqsave(&dev->txq.lock, flags); switch ((retval = usb_submit_urb(urb, GFP_ATOMIC))) { case -EPIPE: netif_stop_queue(net); axusbnet_defer_kevent(dev, EVENT_TX_HALT); break; default: if (netif_msg_tx_err(dev)) devdbg(dev, "tx: submit urb err %d", retval); break; case 0: net->trans_start = jiffies; __skb_queue_tail(&dev->txq, skb); if (dev->txq.qlen >= TX_QLEN(dev)) netif_stop_queue(net); } spin_unlock_irqrestore(&dev->txq.lock, flags); if (retval) { if (netif_msg_tx_err(dev)) devdbg(dev, "drop, code %d", retval); drop: dev->stats.tx_dropped++; if (skb) dev_kfree_skb_any(skb); usb_free_urb(urb); } else if (netif_msg_tx_queued(dev)) { devdbg(dev, "> tx, len %d, type 0x%x", length, skb->protocol); } return NETDEV_TX_OK; } /*-------------------------------------------------------------------------*/ /* tasklet (work deferred from completions, in_irq) or timer */ static void axusbnet_bh(unsigned long param) { struct usbnet *dev = (struct usbnet *) param; struct sk_buff *skb; struct skb_data *entry; while ((skb = skb_dequeue(&dev->done))) { entry = (struct skb_data *) skb->cb; switch (entry->state) { case rx_done: entry->state = rx_cleanup; rx_process(dev, skb); continue; case tx_done: case rx_cleanup: usb_free_urb(entry->urb); dev_kfree_skb(skb); continue; default: devdbg(dev, "bogus skb state %d", entry->state); } } /* waiting for all pending urbs to complete? */ if (dev->wait) { if ((dev->txq.qlen + dev->rxq.qlen + dev->done.qlen) == 0) wake_up(dev->wait); /* or are we maybe short a few urbs? */ } else if (netif_running(dev->net) && netif_device_present(dev->net) && !timer_pending(&dev->delay) && !test_bit(EVENT_RX_HALT, &dev->flags)) { int temp = dev->rxq.qlen; int qlen = RX_QLEN(dev); if (temp < qlen) { struct urb *urb; int i; /* don't refill the queue all at once */ for (i = 0; i < 10 && dev->rxq.qlen < qlen; i++) { urb = usb_alloc_urb(0, GFP_ATOMIC); if (urb != NULL) { #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 14) urb->transfer_flags |= URB_ASYNC_UNLINK; #endif rx_submit(dev, urb, GFP_ATOMIC); } } if (temp != dev->rxq.qlen && netif_msg_link(dev)) devdbg(dev, "rxqlen %d --> %d", temp, dev->rxq.qlen); if (dev->rxq.qlen < qlen) tasklet_schedule(&dev->bh); } if (dev->txq.qlen < TX_QLEN(dev)) netif_wake_queue(dev->net); } } /*------------------------------------------------------------------------- * * USB Device Driver support * *-------------------------------------------------------------------------*/ /* precondition: never called in_interrupt */ static void axusbnet_disconnect(struct usb_interface *intf) { struct usbnet *dev; struct usb_device *xdev; struct net_device *net; dev = usb_get_intfdata(intf); usb_set_intfdata(intf, NULL); if (!dev) return; xdev = interface_to_usbdev(intf); if (netif_msg_probe(dev)) devinfo(dev, "unregister '%s' usb-%s-%s, %s", intf->dev.driver->name, xdev->bus->bus_name, xdev->devpath, dev->driver_info->description); net = dev->net; unregister_netdev(net); /* we don't hold rtnl here ... */ flush_scheduled_work(); if (dev->driver_info->unbind) dev->driver_info->unbind(dev, intf); free_netdev(net); usb_put_dev(xdev); } /*-------------------------------------------------------------------------*/ /* precondition: never called in_interrupt */ static int axusbnet_probe(struct usb_interface *udev, const struct usb_device_id *prod) { struct usbnet *dev; struct net_device *net; struct usb_host_interface *interface; struct driver_info *info; struct usb_device *xdev; int status; const char *name; name = udev->dev.driver->name; info = (struct driver_info *) prod->driver_info; if (!info) { printk(KERN_ERR "blacklisted by %s\n", name); return -ENODEV; } xdev = interface_to_usbdev(udev); interface = udev->cur_altsetting; usb_get_dev(xdev); status = -ENOMEM; /* set up our own records */ net = alloc_etherdev(sizeof(*dev)); if (!net) { printk(KERN_ERR "can't kmalloc dev"); goto out; } dev = netdev_priv(net); dev->udev = xdev; dev->intf = udev; dev->driver_info = info; dev->driver_name = name; dev->msg_enable = netif_msg_init(msg_level, NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK); skb_queue_head_init(&dev->rxq); skb_queue_head_init(&dev->txq); skb_queue_head_init(&dev->done); dev->bh.func = axusbnet_bh; dev->bh.data = (unsigned long) dev; #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20) INIT_WORK(&dev->kevent, kevent, dev); #else INIT_WORK(&dev->kevent, kevent); #endif dev->delay.function = axusbnet_bh; dev->delay.data = (unsigned long) dev; init_timer(&dev->delay); /* mutex_init(&dev->phy_mutex); */ dev->net = net; /* rx and tx sides can use different message sizes; * bind() should set rx_urb_size in that case. */ dev->hard_mtu = net->mtu + net->hard_header_len; #if 0 /* dma_supported() is deeply broken on almost all architectures */ /* possible with some EHCI controllers */ if (dma_supported(&udev->dev, DMA_BIT_MASK(64))) net->features |= NETIF_F_HIGHDMA; #endif #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 30) net->open = axusbnet_open, net->stop = axusbnet_stop, net->hard_start_xmit = axusbnet_start_xmit, net->tx_timeout = axusbnet_tx_timeout, net->get_stats = axusbnet_get_stats; #endif net->watchdog_timeo = TX_TIMEOUT_JIFFIES; net->ethtool_ops = &axusbnet_ethtool_ops; /* allow device-specific bind/init procedures */ /* NOTE net->name still not usable ... */ status = info->bind(dev, udev); if (status < 0) { deverr(dev, "Binding device failed: %d", status); goto out1; } /* maybe the remote can't receive an Ethernet MTU */ if (net->mtu > (dev->hard_mtu - net->hard_header_len)) net->mtu = dev->hard_mtu - net->hard_header_len; status = init_status(dev, udev); if (status < 0) goto out3; if (!dev->rx_urb_size) dev->rx_urb_size = dev->hard_mtu; dev->maxpacket = usb_maxpacket(dev->udev, dev->out, 1); SET_NETDEV_DEV(net, &udev->dev); status = register_netdev(net); if (status) { deverr(dev, "net device registration failed: %d", status); goto out3; } if (netif_msg_probe(dev)) devinfo(dev, "register '%s' at usb-%s-%s, %s, %pM", udev->dev.driver->name, xdev->bus->bus_name, xdev->devpath, dev->driver_info->description, net->dev_addr); /* ok, it's ready to go. */ usb_set_intfdata(udev, dev); /* start as if the link is up */ netif_device_attach(net); return 0; out3: if (info->unbind) info->unbind(dev, udev); out1: free_netdev(net); out: usb_put_dev(xdev); return status; } /*-------------------------------------------------------------------------*/ /* * suspend the whole driver as soon as the first interface is suspended * resume only when the last interface is resumed */ static int axusbnet_suspend(struct usb_interface *intf, #if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 10) pm_message_t message) #else u32 message) #endif { struct usbnet *dev = usb_get_intfdata(intf); if (!dev->suspend_count++) { /* * accelerate emptying of the rx and queues, to avoid * having everything error out. */ netif_device_detach(dev->net); (void) unlink_urbs(dev, &dev->rxq); (void) unlink_urbs(dev, &dev->txq); usb_kill_urb(dev->interrupt); /* * reattach so runtime management can use and * wake the device */ netif_device_attach(dev->net); } return 0; } static int axusbnet_resume(struct usb_interface *intf) { struct usbnet *dev = usb_get_intfdata(intf); int retval = 0; if (!--dev->suspend_count) tasklet_schedule(&dev->bh); retval = init_status(dev, intf); if (retval < 0) return retval; if (dev->interrupt) { retval = usb_submit_urb(dev->interrupt, GFP_KERNEL); if (retval < 0 && netif_msg_ifup(dev)) deverr(dev, "intr submit %d", retval); } return retval; }
static int axusbnet_stop(struct net_device *net) { struct usbnet *dev = netdev_priv(net); struct driver_info *info = dev->driver_info; int temp; int retval; #if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18) DECLARE_WAIT_QUEUE_HEAD_ONSTACK(unlink_wakeup); #else DECLARE_WAIT_QUEUE_HEAD(unlink_wakeup); #endif DECLARE_WAITQUEUE(wait, current); netif_stop_queue(net); if (netif_msg_ifdown(dev)) devinfo(dev, "stop stats: rx/tx %ld/%ld, errs %ld/%ld", dev->stats.rx_packets, dev->stats.tx_packets, dev->stats.rx_errors, dev->stats.tx_errors); /* allow minidriver to stop correctly (wireless devices to turn off * radio etc) */ if (info->stop) { retval = info->stop(dev); if (retval < 0 && netif_msg_ifdown(dev)) devinfo(dev, "stop fail (%d) usbnet usb-%s-%s, %s", retval, dev->udev->bus->bus_name, dev->udev->devpath, info->description); } if (!(info->flags & FLAG_AVOID_UNLINK_URBS)) { /* ensure there are no more active urbs */ add_wait_queue(&unlink_wakeup, &wait); dev->wait = &unlink_wakeup; temp = unlink_urbs(dev, &dev->txq) + unlink_urbs(dev, &dev->rxq); /* maybe wait for deletions to finish. */ while (!skb_queue_empty(&dev->rxq) && !skb_queue_empty(&dev->txq) && !skb_queue_empty(&dev->done)) { msleep(UNLINK_TIMEOUT_MS); if (netif_msg_ifdown(dev)) devdbg(dev, "waited for %d urb completions", temp); } dev->wait = NULL; remove_wait_queue(&unlink_wakeup, &wait); } usb_kill_urb(dev->interrupt); /* deferred work (task, timer, softirq) must also stop. * can't flush_scheduled_work() until we drop rtnl (later), * else workers could deadlock; so make workers a NOP. */ dev->flags = 0; del_timer_sync(&dev->delay); tasklet_kill(&dev->bh); return 0; }
/* work that cannot be done in interrupt context uses keventd. * * NOTE: with 2.5 we could do more of this using completion callbacks, * especially now that control transfers can be queued. */ static void kevent (struct work_struct *work) { struct usbnet *dev = container_of(work, struct usbnet, kevent); int status; /* usb_clear_halt() needs a thread context */ if (test_bit (EVENT_TX_HALT, &dev->flags)) { unlink_urbs (dev, &dev->txq); status = usb_autopm_get_interface(dev->intf); if (status < 0) goto fail_pipe; status = usb_clear_halt (dev->udev, dev->out); usb_autopm_put_interface(dev->intf); if (status < 0 && status != -EPIPE && status != -ESHUTDOWN) { if (netif_msg_tx_err (dev)) fail_pipe: netdev_err(dev->net, "can't clear tx halt, status %d\n", status); } else { clear_bit (EVENT_TX_HALT, &dev->flags); if (status != -ESHUTDOWN) netif_wake_queue (dev->net); } } if (test_bit (EVENT_RX_HALT, &dev->flags)) { //HTC+++ //lock cpu perf usbnet_lock_perf(); //queue usbnet_unlock_perf_delayed_work usbnet_rx_len = 0; schedule_delayed_work(&usbnet_unlock_perf_delayed_work, msecs_to_jiffies(PM_QOS_USBNET_PERF_UNLOCK_TIMER)); pr_info("%s(%d) [USBNET] EVENT_RX_HALT unlink_urbs !!!\n", __func__, __LINE__); pr_info("%s(%d) [USBNET] dev->rxq.qlen:%d\n", __func__, __LINE__, dev->rxq.qlen); //HTC--- unlink_urbs (dev, &dev->rxq); status = usb_autopm_get_interface(dev->intf); if (status < 0) goto fail_halt; status = usb_clear_halt (dev->udev, dev->in); //HTC+++ pr_info("%s(%d) [USBNET] EVENT_RX_HALT usb_clear_halt:%d !!!\n", __func__, __LINE__, status); //HTC--- usb_autopm_put_interface(dev->intf); if (status < 0 && status != -EPIPE && status != -ESHUTDOWN) { if (netif_msg_rx_err (dev)) fail_halt: netdev_err(dev->net, "can't clear rx halt, status %d\n", status); } else { //HTC+++ pr_info("%s(%d) [USBNET] clear_bit EVENT_RX_HALT !!!\n", __func__, __LINE__); //HTC--- clear_bit (EVENT_RX_HALT, &dev->flags); tasklet_schedule (&dev->bh); } } /* tasklet could resubmit itself forever if memory is tight */ if (test_bit (EVENT_RX_MEMORY, &dev->flags)) { struct urb *urb = NULL; int resched = 1; if (netif_running (dev->net)) urb = usb_alloc_urb (0, GFP_KERNEL); else clear_bit (EVENT_RX_MEMORY, &dev->flags); if (urb != NULL) { clear_bit (EVENT_RX_MEMORY, &dev->flags); status = usb_autopm_get_interface(dev->intf); if (status < 0) { usb_free_urb(urb); goto fail_lowmem; } if (rx_submit (dev, urb, GFP_KERNEL) == -ENOLINK) resched = 0; usb_autopm_put_interface(dev->intf); fail_lowmem: if (resched) tasklet_schedule (&dev->bh); } } if (test_bit (EVENT_LINK_RESET, &dev->flags)) { struct driver_info *info = dev->driver_info; int retval = 0; clear_bit (EVENT_LINK_RESET, &dev->flags); status = usb_autopm_get_interface(dev->intf); if (status < 0) goto skip_reset; if(info->link_reset && (retval = info->link_reset(dev)) < 0) { usb_autopm_put_interface(dev->intf); skip_reset: netdev_info(dev->net, "link reset failed (%d) usbnet usb-%s-%s, %s\n", retval, dev->udev->bus->bus_name, dev->udev->devpath, info->description); } else { usb_autopm_put_interface(dev->intf); } } if (dev->flags) netdev_dbg(dev->net, "kevent done, flags = 0x%lx\n", dev->flags); }