Index: uspace/lib/drv/generic/remote_usbhc.c
===================================================================
--- uspace/lib/drv/generic/remote_usbhc.c	(revision 969585f91e912d72b71cfd6d44243c9504d8d795)
+++ uspace/lib/drv/generic/remote_usbhc.c	(revision 7dfc06fa1782dda3da24feb0e244e9bfadcc016e)
@@ -270,5 +270,4 @@
 	}
 
-	size_t max_packet_size = DEV_IPC_GET_ARG3(*call);
 	usb_target_t target = {
 		.address = DEV_IPC_GET_ARG1(*call),
@@ -300,5 +299,5 @@
 	trans->size = len;
 
-	rc = transfer_func(fun, target, max_packet_size,
+	rc = transfer_func(fun, target,
 	    buffer, len,
 	    callback_out, trans);
@@ -326,5 +325,4 @@
 	}
 
-	size_t max_packet_size = DEV_IPC_GET_ARG3(*call);
 	usb_target_t target = {
 		.address = DEV_IPC_GET_ARG1(*call),
@@ -348,5 +346,5 @@
 	trans->size = len;
 
-	int rc = transfer_func(fun, target, max_packet_size,
+	int rc = transfer_func(fun, target,
 	    trans->buffer, len,
 	    callback_in, trans);
@@ -414,5 +412,4 @@
 	};
 	size_t data_buffer_len = DEV_IPC_GET_ARG3(*call);
-	size_t max_packet_size = DEV_IPC_GET_ARG4(*call);
 
 	int rc;
@@ -450,5 +447,5 @@
 	trans->size = data_buffer_len;
 
-	rc = usb_iface->control_write(fun, target, max_packet_size,
+	rc = usb_iface->control_write(fun, target,
 	    setup_packet, setup_packet_len,
 	    data_buffer, data_buffer_len,
@@ -477,5 +474,4 @@
 		.endpoint = DEV_IPC_GET_ARG2(*call)
 	};
-	size_t max_packet_size = DEV_IPC_GET_ARG3(*call);
 
 	int rc;
@@ -515,5 +511,5 @@
 	}
 
-	rc = usb_iface->control_read(fun, target, max_packet_size,
+	rc = usb_iface->control_read(fun, target,
 	    setup_packet, setup_packet_len,
 	    trans->buffer, trans->size,
Index: uspace/lib/drv/include/usbhc_iface.h
===================================================================
--- uspace/lib/drv/include/usbhc_iface.h	(revision 969585f91e912d72b71cfd6d44243c9504d8d795)
+++ uspace/lib/drv/include/usbhc_iface.h	(revision 7dfc06fa1782dda3da24feb0e244e9bfadcc016e)
@@ -66,5 +66,4 @@
  *   - argument #1 is target address
  *   - argument #2 is target endpoint
- *   - argument #3 is max packet size of the endpoint
  * - this call is immediately followed by IPC data read (async version)
  * - the call is not answered until the device returns some data (or until
@@ -202,5 +201,5 @@
 
 /** Out transfer processing function prototype. */
-typedef int (*usbhc_iface_transfer_out_t)(ddf_fun_t *, usb_target_t, size_t,
+typedef int (*usbhc_iface_transfer_out_t)(ddf_fun_t *, usb_target_t,
     void *, size_t,
     usbhc_iface_transfer_out_callback_t, void *);
@@ -210,5 +209,5 @@
 
 /** In transfer processing function prototype. */
-typedef int (*usbhc_iface_transfer_in_t)(ddf_fun_t *, usb_target_t, size_t,
+typedef int (*usbhc_iface_transfer_in_t)(ddf_fun_t *, usb_target_t,
     void *, size_t,
     usbhc_iface_transfer_in_callback_t, void *);
@@ -234,10 +233,8 @@
 
 	int (*control_write)(ddf_fun_t *, usb_target_t,
-	    size_t,
 	    void *, size_t, void *, size_t,
 	    usbhc_iface_transfer_out_callback_t, void *);
 
 	int (*control_read)(ddf_fun_t *, usb_target_t,
-	    size_t,
 	    void *, size_t, void *, size_t,
 	    usbhc_iface_transfer_in_callback_t, void *);