2 files changed, 9 insertions, 5 deletions

diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index 0a0e8cea0afc..8da1a56659be 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -257,15 +257,16 @@ static int usb_unbind_interface(struct device *dev)
         udev = interface_to_usbdev(intf);
         error = usb_autoresume_device(udev);
 
-        /* release all urbs for this interface */
-        usb_disable_interface(interface_to_usbdev(intf), intf);
+        /* Terminate all URBs for this interface unless the driver
+         * supports "soft" unbinding.
+         */
+        if (!driver->soft_unbind)
+                usb_disable_interface(udev, intf);
 
         driver->disconnect(intf);
 
         /* reset other interface state */
-        usb_set_interface(interface_to_usbdev(intf),
-                        intf->altsetting[0].desc.bInterfaceNumber,
-                        0);
+        usb_set_interface(udev, intf->altsetting[0].desc.bInterfaceNumber, 0);
         usb_set_intfdata(intf, NULL);
 
         intf->condition = USB_INTERFACE_UNBOUND;
diff --git a/include/linux/usb.h b/include/linux/usb.h
index cee7fbb2b605..8429d08bd2fd 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -972,6 +972,8 @@ struct usbdrv_wrap {
  *      added to this driver by preventing the sysfs file from being created.
  * @supports_autosuspend: if set to 0, the USB core will not allow autosuspend
  *      for interfaces bound to this driver.
+ * @soft_unbind: if set to 1, the USB core will not kill URBs and disable
+ *      endpoints before calling the driver's disconnect method.
  *
  * USB interface drivers must provide a name, probe() and disconnect()
  * methods, and an id_table.  Other driver fields are optional.
@@ -1012,6 +1014,7 @@ struct usb_driver {
         struct usbdrv_wrap drvwrap;
         unsigned int no_dynamic_id:1;
         unsigned int supports_autosuspend:1;
+        unsigned int soft_unbind:1;
 };
 #define to_usb_driver(d) container_of(d, struct usb_driver, drvwrap.driver)