diff options
Diffstat (limited to 'drivers/usb/core/hub.c')
| -rw-r--r-- | drivers/usb/core/hub.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 8e65f7a..0c87f73 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -836,6 +836,13 @@ static int hub_probe(struct usb_interface *intf, const struct usb_device_id *id) desc = intf->cur_altsetting; hdev = interface_to_usbdev(intf); +#ifdef CONFIG_USB_OTG_BLACKLIST_HUB + if (hdev->parent) { + dev_warn(&intf->dev, "ignoring external hub\n"); + return -ENODEV; + } +#endif + /* Some hubs have a subclass of 1, which AFAICT according to the */ /* specs is not defined, but it works */ if ((desc->desc.bInterfaceSubClass != 0) && @@ -1022,7 +1029,6 @@ void usb_set_device_state(struct usb_device *udev, recursively_mark_NOTATTACHED(udev); spin_unlock_irqrestore(&device_state_lock, flags); } -EXPORT_SYMBOL(usb_set_device_state); #ifdef CONFIG_PM |