diff options
Diffstat (limited to 'drivers/usb/core')
| -rw-r--r-- | drivers/usb/core/config.c | 11 | ||||
| -rw-r--r-- | drivers/usb/core/devio.c | 2 | ||||
| -rw-r--r-- | drivers/usb/core/driver.c | 7 | ||||
| -rw-r--r-- | drivers/usb/core/hcd-pci.c | 2 | ||||
| -rw-r--r-- | drivers/usb/core/hcd.c | 4 | ||||
| -rw-r--r-- | drivers/usb/core/hub.c | 146 | ||||
| -rw-r--r-- | drivers/usb/core/hub.h | 4 | ||||
| -rw-r--r-- | drivers/usb/core/port.c | 110 | ||||
| -rw-r--r-- | drivers/usb/core/quirks.c | 7 | ||||
| -rw-r--r-- | drivers/usb/core/urb.c | 1 | ||||
| -rw-r--r-- | drivers/usb/core/usb.c | 1 |
11 files changed, 225 insertions, 70 deletions
diff --git a/drivers/usb/core/config.c b/drivers/usb/core/config.c index 1ab4df1de2da..b2a540b43f97 100644 --- a/drivers/usb/core/config.c +++ b/drivers/usb/core/config.c @@ -199,6 +199,17 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno, int inum, if (n == 0) n = 9; /* 32 ms = 2^(9-1) uframes */ j = 16; + + /* + * Adjust bInterval for quirked devices. + * This quirk fixes bIntervals reported in + * linear microframes. + */ + if (to_usb_device(ddev)->quirks & + USB_QUIRK_LINEAR_UFRAME_INTR_BINTERVAL) { + n = clamp(fls(d->bInterval), i, j); + i = j = n; + } break; default: /* USB_SPEED_FULL or _LOW */ /* For low-speed, 10 ms is the official minimum. diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c index 257876ea03a1..0b59731c3021 100644 --- a/drivers/usb/core/devio.c +++ b/drivers/usb/core/devio.c @@ -1509,7 +1509,7 @@ static int proc_do_submiturb(struct usb_dev_state *ps, struct usbdevfs_urb *uurb u = (is_in ? URB_DIR_IN : URB_DIR_OUT); if (uurb->flags & USBDEVFS_URB_ISO_ASAP) u |= URB_ISO_ASAP; - if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK) + if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK && is_in) u |= URB_SHORT_NOT_OK; if (uurb->flags & USBDEVFS_URB_NO_FSBR) u |= URB_NO_FSBR; diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c index 4aeb10034de7..9bffd26cea05 100644 --- a/drivers/usb/core/driver.c +++ b/drivers/usb/core/driver.c @@ -417,10 +417,11 @@ static int usb_unbind_interface(struct device *dev) */ lpm_disable_error = usb_unlocked_disable_lpm(udev); - /* Terminate all URBs for this interface unless the driver - * supports "soft" unbinding. + /* + * Terminate all URBs for this interface unless the driver + * supports "soft" unbinding and the device is still present. */ - if (!driver->soft_unbind) + if (!driver->soft_unbind || udev->state == USB_STATE_NOTATTACHED) usb_disable_interface(udev, intf, false); driver->disconnect(intf); diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c index 82044b5d6113..efc953119ce2 100644 --- a/drivers/usb/core/hcd-pci.c +++ b/drivers/usb/core/hcd-pci.c @@ -380,6 +380,8 @@ void usb_hcd_pci_shutdown(struct pci_dev *dev) if (test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags) && hcd->driver->shutdown) { hcd->driver->shutdown(hcd); + if (usb_hcd_is_primary_hcd(hcd) && hcd->irq > 0) + free_irq(hcd->irq, hcd); pci_disable_device(dev); } } diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index bec31e2efb88..487abcfcccd8 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -855,8 +855,6 @@ static ssize_t authorized_default_show(struct device *dev, struct usb_bus *usb_bus = rh_usb_dev->bus; struct usb_hcd *usb_hcd; - if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ - return -ENODEV; usb_hcd = bus_to_hcd(usb_bus); return snprintf(buf, PAGE_SIZE, "%u\n", usb_hcd->authorized_default); } @@ -871,8 +869,6 @@ static ssize_t authorized_default_store(struct device *dev, struct usb_bus *usb_bus = rh_usb_dev->bus; struct usb_hcd *usb_hcd; - if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ - return -ENODEV; usb_hcd = bus_to_hcd(usb_bus); result = sscanf(buf, "%u\n", &val); if (result == 1) { diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 879b66e13370..8a4dcbc7a75f 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -889,6 +889,25 @@ static int hub_usb3_port_disable(struct usb_hub *hub, int port1) if (!hub_is_superspeed(hub->hdev)) return -EINVAL; + ret = hub_port_status(hub, port1, &portstatus, &portchange); + if (ret < 0) + return ret; + + /* + * USB controller Advanced Micro Devices, Inc. [AMD] FCH USB XHCI + * Controller [1022:7814] will have spurious result making the following + * usb 3.0 device hotplugging route to the 2.0 root hub and recognized + * as high-speed device if we set the usb 3.0 port link state to + * Disabled. Since it's already in USB_SS_PORT_LS_RX_DETECT state, we + * check the state here to avoid the bug. + */ + if ((portstatus & USB_PORT_STAT_LINK_STATE) == + USB_SS_PORT_LS_RX_DETECT) { + dev_dbg(&hub->ports[port1 - 1]->dev, + "Not disabling port; link state is RxDetect\n"); + return ret; + } + ret = hub_set_port_link_state(hub, port1, USB_SS_PORT_LS_SS_DISABLED); if (ret) return ret; @@ -1526,18 +1545,6 @@ static int hub_configure(struct usb_hub *hub, dev_dbg(hub_dev, "%umA bus power budget for each child\n", hub->mA_per_port); - /* Update the HCD's internal representation of this hub before khubd - * starts getting port status changes for devices under the hub. - */ - if (hcd->driver->update_hub_device) { - ret = hcd->driver->update_hub_device(hcd, hdev, - &hub->tt, GFP_KERNEL); - if (ret < 0) { - message = "can't update HCD hub info"; - goto fail; - } - } - ret = hub_hub_status(hub, &hubstatus, &hubchange); if (ret < 0) { message = "can't get hub status"; @@ -1589,10 +1596,28 @@ static int hub_configure(struct usb_hub *hub, } } hdev->maxchild = i; + for (i = 0; i < hdev->maxchild; i++) { + struct usb_port *port_dev = hub->ports[i]; + + pm_runtime_put(&port_dev->dev); + } + mutex_unlock(&usb_port_peer_mutex); if (ret < 0) goto fail; + /* Update the HCD's internal representation of this hub before khubd + * starts getting port status changes for devices under the hub. + */ + if (hcd->driver->update_hub_device) { + ret = hcd->driver->update_hub_device(hcd, hdev, + &hub->tt, GFP_KERNEL); + if (ret < 0) { + message = "can't update HCD hub info"; + goto fail; + } + } + usb_hub_adjust_deviceremovable(hdev, hub->descriptor); hub_activate(hub, HUB_INIT); @@ -2581,13 +2606,20 @@ static int hub_port_reset(struct usb_hub *hub, int port1, /* Is a USB 3.0 port in the Inactive or Compliance Mode state? * Port worm reset is required to recover */ -static bool hub_port_warm_reset_required(struct usb_hub *hub, u16 portstatus) +static bool hub_port_warm_reset_required(struct usb_hub *hub, int port1, + u16 portstatus) { - return hub_is_superspeed(hub->hdev) && - (((portstatus & USB_PORT_STAT_LINK_STATE) == - USB_SS_PORT_LS_SS_INACTIVE) || - ((portstatus & USB_PORT_STAT_LINK_STATE) == - USB_SS_PORT_LS_COMP_MOD)) ; + u16 link_state; + + if (!hub_is_superspeed(hub->hdev)) + return false; + + if (test_bit(port1, hub->warm_reset_bits)) + return true; + + link_state = portstatus & USB_PORT_STAT_LINK_STATE; + return link_state == USB_SS_PORT_LS_SS_INACTIVE + || link_state == USB_SS_PORT_LS_COMP_MOD; } static int hub_port_wait_reset(struct usb_hub *hub, int port1, @@ -2624,7 +2656,7 @@ static int hub_port_wait_reset(struct usb_hub *hub, int port1, if ((portstatus & USB_PORT_STAT_RESET)) return -EBUSY; - if (hub_port_warm_reset_required(hub, portstatus)) + if (hub_port_warm_reset_required(hub, port1, portstatus)) return -ENOTCONN; /* Device went away? */ @@ -2724,9 +2756,10 @@ static int hub_port_reset(struct usb_hub *hub, int port1, if (status < 0) goto done; - if (hub_port_warm_reset_required(hub, portstatus)) + if (hub_port_warm_reset_required(hub, port1, portstatus)) warm = true; } + clear_bit(port1, hub->warm_reset_bits); /* Reset the port */ for (i = 0; i < PORT_RESET_TRIES; i++) { @@ -2763,7 +2796,8 @@ static int hub_port_reset(struct usb_hub *hub, int port1, &portstatus, &portchange) < 0) goto done; - if (!hub_port_warm_reset_required(hub, portstatus)) + if (!hub_port_warm_reset_required(hub, port1, + portstatus)) goto done; /* @@ -2850,8 +2884,13 @@ static int check_port_resume_type(struct usb_device *udev, { struct usb_port *port_dev = hub->ports[port1 - 1]; + /* Is a warm reset needed to recover the connection? */ + if (status == 0 && udev->reset_resume + && hub_port_warm_reset_required(hub, port1, portstatus)) { + /* pass */; + } /* Is the device still present? */ - if (status || port_is_suspended(hub, portstatus) || + else if (status || port_is_suspended(hub, portstatus) || !port_is_power_on(hub, portstatus) || !(portstatus & USB_PORT_STAT_CONNECTION)) { if (status >= 0) @@ -3239,6 +3278,43 @@ static int finish_port_resume(struct usb_device *udev) } /* + * There are some SS USB devices which take longer time for link training. + * XHCI specs 4.19.4 says that when Link training is successful, port + * sets CSC bit to 1. So if SW reads port status before successful link + * training, then it will not find device to be present. + * USB Analyzer log with such buggy devices show that in some cases + * device switch on the RX termination after long delay of host enabling + * the VBUS. In few other cases it has been seen that device fails to + * negotiate link training in first attempt. It has been + * reported till now that few devices take as long as 2000 ms to train + * the link after host enabling its VBUS and termination. Following + * routine implements a 2000 ms timeout for link training. If in a case + * link trains before timeout, loop will exit earlier. + * + * FIXME: If a device was connected before suspend, but was removed + * while system was asleep, then the loop in the following routine will + * only exit at timeout. + * + * This routine should only be called when persist is enabled for a SS + * device. + */ +static int wait_for_ss_port_enable(struct usb_device *udev, + struct usb_hub *hub, int *port1, + u16 *portchange, u16 *portstatus) +{ + int status = 0, delay_ms = 0; + + while (delay_ms < 2000) { + if (status || *portstatus & USB_PORT_STAT_CONNECTION) + break; + msleep(20); + delay_ms += 20; + status = hub_port_status(hub, *port1, portstatus, portchange); + } + return status; +} + +/* * usb_port_resume - re-activate a suspended usb device's upstream port * @udev: device to re-activate, not a root hub * Context: must be able to sleep; device not locked; pm locks held @@ -3334,6 +3410,10 @@ int usb_port_resume(struct usb_device *udev, pm_message_t msg) } } + if (udev->persist_enabled && hub_is_superspeed(hub->hdev)) + status = wait_for_ss_port_enable(udev, hub, &port1, &portchange, + &portstatus); + status = check_port_resume_type(udev, hub, port1, status, portchange, portstatus); if (status == 0) @@ -3458,7 +3538,8 @@ static int hub_suspend(struct usb_interface *intf, pm_message_t msg) struct usb_device *udev = port_dev->child; if (udev && udev->can_submit) { - dev_warn(&port_dev->dev, "not suspended yet\n"); + dev_warn(&port_dev->dev, "device %s not suspended yet\n", + dev_name(&udev->dev)); if (PMSG_IS_AUTO(msg)) return -EBUSY; } @@ -3853,7 +3934,8 @@ int usb_disable_lpm(struct usb_device *udev) if (!udev || !udev->parent || udev->speed != USB_SPEED_SUPER || - !udev->lpm_capable) + !udev->lpm_capable || + udev->state < USB_STATE_DEFAULT) return 0; hcd = bus_to_hcd(udev->bus); @@ -3909,7 +3991,8 @@ void usb_enable_lpm(struct usb_device *udev) if (!udev || !udev->parent || udev->speed != USB_SPEED_SUPER || - !udev->lpm_capable) + !udev->lpm_capable || + udev->state < USB_STATE_DEFAULT) return; udev->lpm_disable_count--; @@ -4524,6 +4607,7 @@ static void hub_port_connect(struct usb_hub *hub, int port1, u16 portstatus, struct usb_hcd *hcd = bus_to_hcd(hdev->bus); struct usb_port *port_dev = hub->ports[port1 - 1]; struct usb_device *udev = port_dev->child; + static int unreliable_port = -1; /* Disconnect any existing devices under this port */ if (udev) { @@ -4544,10 +4628,14 @@ static void hub_port_connect(struct usb_hub *hub, int port1, u16 portstatus, USB_PORT_STAT_C_ENABLE)) { status = hub_port_debounce_be_stable(hub, port1); if (status < 0) { - if (status != -ENODEV && printk_ratelimit()) - dev_err(&port_dev->dev, - "connect-debounce failed\n"); + if (status != -ENODEV && + port1 != unreliable_port && + printk_ratelimit()) + dev_err(&udev->dev, "connect-debounce failed, port %d disabled\n", + port1); + portstatus &= ~USB_PORT_STAT_CONNECTION; + unreliable_port = port1; } else { portstatus = status; } @@ -4863,7 +4951,7 @@ static void port_event(struct usb_hub *hub, int port1) * Warm reset a USB3 protocol port if it's in * SS.Inactive state. */ - if (hub_port_warm_reset_required(hub, portstatus)) { + if (hub_port_warm_reset_required(hub, port1, portstatus)) { dev_dbg(&port_dev->dev, "do warm reset\n"); if (!udev || !(portstatus & USB_PORT_STAT_CONNECTION) || udev->state == USB_STATE_NOTATTACHED) { diff --git a/drivers/usb/core/hub.h b/drivers/usb/core/hub.h index 0a7cdc0ef0a9..c77d8778af4b 100644 --- a/drivers/usb/core/hub.h +++ b/drivers/usb/core/hub.h @@ -52,6 +52,8 @@ struct usb_hub { unsigned long power_bits[1]; /* ports that are powered */ unsigned long child_usage_bits[1]; /* ports powered on for children */ + unsigned long warm_reset_bits[1]; /* ports requesting warm + reset recovery */ #if USB_MAXCHILDREN > 31 /* 8*sizeof(unsigned long) - 1 */ #error event_bits[] is too short! #endif @@ -84,6 +86,7 @@ struct usb_hub { * @dev: generic device interface * @port_owner: port's owner * @peer: related usb2 and usb3 ports (share the same connector) + * @req: default pm qos request for hubs without port power control * @connect_type: port's connect type * @location: opaque representation of platform connector location * @status_lock: synchronize port_event() vs usb_port_{suspend|resume} @@ -95,6 +98,7 @@ struct usb_port { struct device dev; struct usb_dev_state *port_owner; struct usb_port *peer; + struct dev_pm_qos_request *req; enum usb_port_connect_type connect_type; usb_port_location_t location; struct mutex status_lock; diff --git a/drivers/usb/core/port.c b/drivers/usb/core/port.c index 62036faf56c0..cd3f9dc24a06 100644 --- a/drivers/usb/core/port.c +++ b/drivers/usb/core/port.c @@ -21,6 +21,8 @@ #include "hub.h" +static int usb_port_block_power_off; + static const struct attribute_group *port_dev_group[]; static ssize_t connect_type_show(struct device *dev, @@ -66,6 +68,7 @@ static void usb_port_device_release(struct device *dev) { struct usb_port *port_dev = to_usb_port(dev); + kfree(port_dev->req); kfree(port_dev); } @@ -100,16 +103,19 @@ static int usb_port_runtime_resume(struct device *dev) msleep(hub_power_on_good_delay(hub)); if (udev && !retval) { /* - * Attempt to wait for usb hub port to be reconnected in order - * to make the resume procedure successful. The device may have - * disconnected while the port was powered off, so ignore the - * return status. + * Our preference is to simply wait for the port to reconnect, + * as that is the lowest latency method to restart the port. + * However, there are cases where toggling port power results in + * the host port and the device port getting out of sync causing + * a link training live lock. Upon timeout, flag the port as + * needing warm reset recovery (to be performed later by + * usb_port_resume() as requested via usb_wakeup_notification()) */ - retval = hub_port_debounce_be_connected(hub, port1); - if (retval < 0) - dev_dbg(&port_dev->dev, "can't get reconnection after setting port power on, status %d\n", - retval); - retval = 0; + if (hub_port_debounce_be_connected(hub, port1) < 0) { + dev_dbg(&port_dev->dev, "reconnect timeout\n"); + if (hub_is_superspeed(hdev)) + set_bit(port1, hub->warm_reset_bits); + } /* Force the child awake to revalidate after the power loss. */ if (!test_and_set_bit(port1, hub->child_usage_bits)) { @@ -142,6 +148,9 @@ static int usb_port_runtime_suspend(struct device *dev) == PM_QOS_FLAGS_ALL) return -EAGAIN; + if (usb_port_block_power_off) + return -EBUSY; + usb_autopm_get_interface(intf); retval = usb_hub_set_port_power(hdev, hub, port1, false); usb_clear_port_feature(hdev, port1, USB_PORT_FEAT_C_CONNECTION); @@ -190,11 +199,19 @@ static int link_peers(struct usb_port *left, struct usb_port *right) if (left->peer || right->peer) { struct usb_port *lpeer = left->peer; struct usb_port *rpeer = right->peer; - - WARN(1, "failed to peer %s and %s (%s -> %p) (%s -> %p)\n", - dev_name(&left->dev), dev_name(&right->dev), - dev_name(&left->dev), lpeer, - dev_name(&right->dev), rpeer); + char *method; + + if (left->location && left->location == right->location) + method = "location"; + else + method = "default"; + + pr_warn("usb: failed to peer %s and %s by %s (%s:%s) (%s:%s)\n", + dev_name(&left->dev), dev_name(&right->dev), method, + dev_name(&left->dev), + lpeer ? dev_name(&lpeer->dev) : "none", + dev_name(&right->dev), + rpeer ? dev_name(&rpeer->dev) : "none"); return -EBUSY; } @@ -251,6 +268,7 @@ static void link_peers_report(struct usb_port *left, struct usb_port *right) dev_warn(&left->dev, "failed to peer to %s (%d)\n", dev_name(&right->dev), rc); pr_warn_once("usb: port power management may be unreliable\n"); + usb_port_block_power_off = 1; } } @@ -386,9 +404,13 @@ int usb_hub_create_port_device(struct usb_hub *hub, int port1) int retval; port_dev = kzalloc(sizeof(*port_dev), GFP_KERNEL); - if (!port_dev) { - retval = -ENOMEM; - goto exit; + if (!port_dev) + return -ENOMEM; + + port_dev->req = kzalloc(sizeof(*(port_dev->req)), GFP_KERNEL); + if (!port_dev->req) { + kfree(port_dev); + return -ENOMEM; } hub->ports[port1 - 1] = port_dev; @@ -404,31 +426,53 @@ int usb_hub_create_port_device(struct usb_hub *hub, int port1) port1); mutex_init(&port_dev->status_lock); retval = device_register(&port_dev->dev); - if (retval) - goto error_register; + if (retval) { + put_device(&port_dev->dev); + return retval; + } + + /* Set default policy of port-poweroff disabled. */ + retval = dev_pm_qos_add_request(&port_dev->dev, port_dev->req, + DEV_PM_QOS_FLAGS, PM_QOS_FLAG_NO_POWER_OFF); + if (retval < 0) { + device_unregister(&port_dev->dev); + return retval; + } find_and_link_peer(hub, port1); + /* + * Enable runtime pm and hold a refernce that hub_configure() + * will drop once the PM_QOS_NO_POWER_OFF flag state has been set + * and the hub has been fully registered (hdev->maxchild set). + */ pm_runtime_set_active(&port_dev->dev); + pm_runtime_get_noresume(&port_dev->dev); + pm_runtime_enable(&port_dev->dev); + device_enable_async_suspend(&port_dev->dev); /* - * Do not enable port runtime pm if the hub does not support - * power switching. Also, userspace must have final say of - * whether a port is permitted to power-off. Do not enable - * runtime pm if we fail to expose pm_qos_no_power_off. + * Keep hidden the ability to enable port-poweroff if the hub + * does not support power switching. */ - if (hub_is_port_power_switchable(hub) - && dev_pm_qos_expose_flags(&port_dev->dev, - PM_QOS_FLAG_NO_POWER_OFF) == 0) - pm_runtime_enable(&port_dev->dev); + if (!hub_is_port_power_switchable(hub)) + return 0; - device_enable_async_suspend(&port_dev->dev); - return 0; + /* Attempt to let userspace take over the policy. */ + retval = dev_pm_qos_expose_flags(&port_dev->dev, + PM_QOS_FLAG_NO_POWER_OFF); + if (retval < 0) { + dev_warn(&port_dev->dev, "failed to expose pm_qos_no_poweroff\n"); + return 0; + } -error_register: - put_device(&port_dev->dev); -exit: - return retval; + /* Userspace owns the policy, drop the kernel 'no_poweroff' request. */ + retval = dev_pm_qos_remove_request(port_dev->req); + if (retval >= 0) { + kfree(port_dev->req); + port_dev->req = NULL; + } + return 0; } void usb_hub_remove_port_device(struct usb_hub *hub, int port1) diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c index 739ee8e8bdfd..bae636e2a1a3 100644 --- a/drivers/usb/core/quirks.c +++ b/drivers/usb/core/quirks.c @@ -145,6 +145,10 @@ static const struct usb_device_id usb_quirk_list[] = { /* SKYMEDI USB_DRIVE */ { USB_DEVICE(0x1516, 0x8628), .driver_info = USB_QUIRK_RESET_RESUME }, + /* Razer - Razer Blade Keyboard */ + { USB_DEVICE(0x1532, 0x0116), .driver_info = + USB_QUIRK_LINEAR_UFRAME_INTR_BINTERVAL }, + /* BUILDWIN Photo Frame */ { USB_DEVICE(0x1908, 0x1315), .driver_info = USB_QUIRK_HONOR_BNUMINTERFACES }, @@ -152,6 +156,9 @@ static const struct usb_device_id usb_quirk_list[] = { /* INTEL VALUE SSD */ { USB_DEVICE(0x8086, 0xf1a5), .driver_info = USB_QUIRK_RESET_RESUME }, + /* USB3503 */ + { USB_DEVICE(0x0424, 0x3503), .driver_info = USB_QUIRK_RESET_RESUME }, + { } /* terminating entry must be last */ }; diff --git a/drivers/usb/core/urb.c b/drivers/usb/core/urb.c index 991386ceb4ec..c9e8ee81b6b7 100644 --- a/drivers/usb/core/urb.c +++ b/drivers/usb/core/urb.c @@ -454,6 +454,7 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags) URB_FREE_BUFFER); switch (xfertype) { case USB_ENDPOINT_XFER_BULK: + case USB_ENDPOINT_XFER_INT: if (is_out) allowed |= URB_ZERO_PACKET; /* FALLTHROUGH */ diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c index 4d1144990d4c..2dd2362198d2 100644 --- a/drivers/usb/core/usb.c +++ b/drivers/usb/core/usb.c @@ -501,6 +501,7 @@ struct usb_device *usb_alloc_dev(struct usb_device *parent, } return dev; } +EXPORT_SYMBOL_GPL(usb_alloc_dev); /** * usb_get_dev - increments the reference count of the usb device structure |
