diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/core/message.c | 151 |
1 files changed, 75 insertions, 76 deletions
diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c index b2f608b0538d..8569600f3130 100644 --- a/drivers/usb/core/message.c +++ b/drivers/usb/core/message.c @@ -1411,15 +1411,7 @@ free_interfaces: return ret; } } - } - /* if it's already configured, clear out old state first. - * getting rid of old interfaces means unbinding their drivers. - */ - if (dev->state != USB_STATE_ADDRESS) - usb_disable_device (dev, 1); // Skip ep0 - - if (cp) { i = dev->bus_mA - cp->desc.bMaxPower * 2; if (i < 0) dev_warn(&dev->dev, "new config #%d exceeds power " @@ -1427,84 +1419,91 @@ free_interfaces: configuration, -i); } + /* if it's already configured, clear out old state first. + * getting rid of old interfaces means unbinding their drivers. + */ + if (dev->state != USB_STATE_ADDRESS) + usb_disable_device (dev, 1); // Skip ep0 + if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_CONFIGURATION, 0, configuration, 0, - NULL, 0, USB_CTRL_SET_TIMEOUT)) < 0) - goto free_interfaces; + NULL, 0, USB_CTRL_SET_TIMEOUT)) < 0) { + + /* All the old state is gone, so what else can we do? + * The device is probably useless now anyway. + */ + cp = NULL; + } dev->actconfig = cp; - if (!cp) + if (!cp) { usb_set_device_state(dev, USB_STATE_ADDRESS); - else { - usb_set_device_state(dev, USB_STATE_CONFIGURED); + goto free_interfaces; + } + usb_set_device_state(dev, USB_STATE_CONFIGURED); - /* Initialize the new interface structures and the - * hc/hcd/usbcore interface/endpoint state. - */ - for (i = 0; i < nintf; ++i) { - struct usb_interface_cache *intfc; - struct usb_interface *intf; - struct usb_host_interface *alt; - - cp->interface[i] = intf = new_interfaces[i]; - intfc = cp->intf_cache[i]; - intf->altsetting = intfc->altsetting; - intf->num_altsetting = intfc->num_altsetting; - kref_get(&intfc->ref); - - alt = usb_altnum_to_altsetting(intf, 0); - - /* No altsetting 0? We'll assume the first altsetting. - * We could use a GetInterface call, but if a device is - * so non-compliant that it doesn't have altsetting 0 - * then I wouldn't trust its reply anyway. - */ - if (!alt) - alt = &intf->altsetting[0]; - - intf->cur_altsetting = alt; - usb_enable_interface(dev, intf); - intf->dev.parent = &dev->dev; - intf->dev.driver = NULL; - intf->dev.bus = &usb_bus_type; - intf->dev.dma_mask = dev->dev.dma_mask; - intf->dev.release = release_interface; - device_initialize (&intf->dev); - mark_quiesced(intf); - sprintf (&intf->dev.bus_id[0], "%d-%s:%d.%d", - dev->bus->busnum, dev->devpath, - configuration, - alt->desc.bInterfaceNumber); - } - kfree(new_interfaces); + /* Initialize the new interface structures and the + * hc/hcd/usbcore interface/endpoint state. + */ + for (i = 0; i < nintf; ++i) { + struct usb_interface_cache *intfc; + struct usb_interface *intf; + struct usb_host_interface *alt; - if (cp->string == NULL) - cp->string = usb_cache_string(dev, - cp->desc.iConfiguration); + cp->interface[i] = intf = new_interfaces[i]; + intfc = cp->intf_cache[i]; + intf->altsetting = intfc->altsetting; + intf->num_altsetting = intfc->num_altsetting; + kref_get(&intfc->ref); - /* Now that all the interfaces are set up, register them - * to trigger binding of drivers to interfaces. probe() - * routines may install different altsettings and may - * claim() any interfaces not yet bound. Many class drivers - * need that: CDC, audio, video, etc. + alt = usb_altnum_to_altsetting(intf, 0); + + /* No altsetting 0? We'll assume the first altsetting. + * We could use a GetInterface call, but if a device is + * so non-compliant that it doesn't have altsetting 0 + * then I wouldn't trust its reply anyway. */ - for (i = 0; i < nintf; ++i) { - struct usb_interface *intf = cp->interface[i]; - - dev_dbg (&dev->dev, - "adding %s (config #%d, interface %d)\n", - intf->dev.bus_id, configuration, - intf->cur_altsetting->desc.bInterfaceNumber); - ret = device_add (&intf->dev); - if (ret != 0) { - dev_err(&dev->dev, - "device_add(%s) --> %d\n", - intf->dev.bus_id, - ret); - continue; - } - usb_create_sysfs_intf_files (intf); + if (!alt) + alt = &intf->altsetting[0]; + + intf->cur_altsetting = alt; + usb_enable_interface(dev, intf); + intf->dev.parent = &dev->dev; + intf->dev.driver = NULL; + intf->dev.bus = &usb_bus_type; + intf->dev.dma_mask = dev->dev.dma_mask; + intf->dev.release = release_interface; + device_initialize (&intf->dev); + mark_quiesced(intf); + sprintf (&intf->dev.bus_id[0], "%d-%s:%d.%d", + dev->bus->busnum, dev->devpath, + configuration, alt->desc.bInterfaceNumber); + } + kfree(new_interfaces); + + if (cp->string == NULL) + cp->string = usb_cache_string(dev, cp->desc.iConfiguration); + + /* Now that all the interfaces are set up, register them + * to trigger binding of drivers to interfaces. probe() + * routines may install different altsettings and may + * claim() any interfaces not yet bound. Many class drivers + * need that: CDC, audio, video, etc. + */ + for (i = 0; i < nintf; ++i) { + struct usb_interface *intf = cp->interface[i]; + + dev_dbg (&dev->dev, + "adding %s (config #%d, interface %d)\n", + intf->dev.bus_id, configuration, + intf->cur_altsetting->desc.bInterfaceNumber); + ret = device_add (&intf->dev); + if (ret != 0) { + dev_err(&dev->dev, "device_add(%s) --> %d\n", + intf->dev.bus_id, ret); + continue; } + usb_create_sysfs_intf_files (intf); } return 0; |