diff options
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/core/driver.c | 34 |
1 files changed, 22 insertions, 12 deletions
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c index 1c976c141f3..4f864472c5c 100644 --- a/drivers/usb/core/driver.c +++ b/drivers/usb/core/driver.c @@ -239,24 +239,31 @@ static int usb_probe_interface(struct device *dev) /* Carry out a deferred switch to altsetting 0 */ if (intf->needs_altsetting0) { - usb_set_interface(udev, intf->altsetting[0]. + error = usb_set_interface(udev, intf->altsetting[0]. desc.bInterfaceNumber, 0); + if (error < 0) + goto err; + intf->needs_altsetting0 = 0; } error = driver->probe(intf, id); - if (error) { - mark_quiesced(intf); - intf->needs_remote_wakeup = 0; - intf->condition = USB_INTERFACE_UNBOUND; - usb_cancel_queued_reset(intf); - } else - intf->condition = USB_INTERFACE_BOUND; + if (error) + goto err; + intf->condition = USB_INTERFACE_BOUND; usb_autosuspend_device(udev); } return error; + +err: + mark_quiesced(intf); + intf->needs_remote_wakeup = 0; + intf->condition = USB_INTERFACE_UNBOUND; + usb_cancel_queued_reset(intf); + usb_autosuspend_device(udev); + return error; } /* called from driver core with dev locked */ @@ -265,7 +272,7 @@ static int usb_unbind_interface(struct device *dev) struct usb_driver *driver = to_usb_driver(dev->driver); struct usb_interface *intf = to_usb_interface(dev); struct usb_device *udev; - int error; + int error, r; intf->condition = USB_INTERFACE_UNBINDING; @@ -293,11 +300,14 @@ static int usb_unbind_interface(struct device *dev) * Just re-enable it without affecting the endpoint toggles. */ usb_enable_interface(udev, intf, false); - } else if (!error && intf->dev.power.status == DPM_ON) - usb_set_interface(udev, intf->altsetting[0]. + } else if (!error && intf->dev.power.status == DPM_ON) { + r = usb_set_interface(udev, intf->altsetting[0]. desc.bInterfaceNumber, 0); - else + if (r < 0) + intf->needs_altsetting0 = 1; + } else { intf->needs_altsetting0 = 1; + } usb_set_intfdata(intf, NULL); intf->condition = USB_INTERFACE_UNBOUND; |