The talk about disconnect locking reminded me of this - the error code in
the no-driver case for the disconnect ioctl isn't a unique error code.
This changes the error code to what getdriver() uses, -ENODATA.
--- linux-2.5.42/drivers/usb/core/devio.c Sat Oct 12 00:22:08 2002
+++ linux/drivers/usb/core/devio.c Mon Oct 14 12:24:18 2002
@@ -1077,7 +1077,7 @@
driver->name, ps->dev->devnum, ctrl.ifno);
usb_device_remove(&ifp->dev);
} else
- retval = -EINVAL;
+ retval = -ENODATA;
break;
/* let kernel drivers try to (re)bind to the interface */
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