Index: uspace/lib/usb/include/usb/host/device_keeper.h
===================================================================
--- uspace/lib/usb/include/usb/host/device_keeper.h	(revision 4fd3faf06b8a4954818da61d7c31ecaba4839d5c)
+++ uspace/lib/usb/include/usb/host/device_keeper.h	(revision ffc63b0f6b944d4d796b469b5aec506c6dd1dbba)
@@ -96,11 +96,4 @@
 usb_speed_t usb_device_keeper_get_speed(usb_device_keeper_t *instance,
     usb_address_t address);
-
-void usb_device_keeper_use_control(usb_device_keeper_t *instance,
-    usb_target_t target);
-
-void usb_device_keeper_release_control(usb_device_keeper_t *instance,
-    usb_target_t target);
-
 #endif
 /**
Index: uspace/lib/usb/src/host/device_keeper.c
===================================================================
--- uspace/lib/usb/src/host/device_keeper.c	(revision 4fd3faf06b8a4954818da61d7c31ecaba4839d5c)
+++ uspace/lib/usb/src/host/device_keeper.c	(revision ffc63b0f6b944d4d796b469b5aec506c6dd1dbba)
@@ -264,29 +264,4 @@
 	return instance->devices[address].speed;
 }
-/*----------------------------------------------------------------------------*/
-void usb_device_keeper_use_control(
-    usb_device_keeper_t *instance, usb_target_t target)
-{
-	assert(instance);
-	const uint16_t ep = 1 << target.endpoint;
-	fibril_mutex_lock(&instance->guard);
-	while (instance->devices[target.address].control_used & ep) {
-		fibril_condvar_wait(&instance->change, &instance->guard);
-	}
-	instance->devices[target.address].control_used |= ep;
-	fibril_mutex_unlock(&instance->guard);
-}
-/*----------------------------------------------------------------------------*/
-void usb_device_keeper_release_control(
-    usb_device_keeper_t *instance, usb_target_t target)
-{
-	assert(instance);
-	const uint16_t ep = 1 << target.endpoint;
-	fibril_mutex_lock(&instance->guard);
-	assert((instance->devices[target.address].control_used & ep) != 0);
-	instance->devices[target.address].control_used &= ~ep;
-	fibril_mutex_unlock(&instance->guard);
-	fibril_condvar_signal(&instance->change);
-}
 /**
  * @}