Index: uspace/lib/usb/src/hidreport.c
===================================================================
--- uspace/lib/usb/src/hidreport.c	(revision 27b85d9ebdc66e9e29d0e2194cb70e62a1180a40)
+++ uspace/lib/usb/src/hidreport.c	(revision a91fbb153d56de5c4095bc221b0982f9fe1e89be)
@@ -119,14 +119,4 @@
 	uint16_t length =  hid_desc->report_desc_info.length;
 	size_t actual_size = 0;
-	
-	/*
-	 * Start session for the control transfer.
-	 */
-	int sess_rc = usb_pipe_start_session(&dev->ctrl_pipe);
-	if (sess_rc != EOK) {
-		usb_log_warning("Failed to start a session: %s.\n",
-		    str_error(sess_rc));
-		return sess_rc;
-	}
 
 	/*
@@ -162,16 +152,4 @@
 		    "%u)\n", actual_size, length);
 		return EINVAL;
-	}
-	
-	/*
-	 * End session for the control transfer.
-	 */
-	sess_rc = usb_pipe_end_session(&dev->ctrl_pipe);
-	if (sess_rc != EOK) {
-		usb_log_warning("Failed to end a session: %s.\n",
-		    str_error(sess_rc));
-		free(*report_desc);
-		*report_desc = NULL;
-		return sess_rc;
 	}
 	
Index: uspace/lib/usb/src/hidreq.c
===================================================================
--- uspace/lib/usb/src/hidreq.c	(revision 27b85d9ebdc66e9e29d0e2194cb70e62a1180a40)
+++ uspace/lib/usb/src/hidreq.c	(revision a91fbb153d56de5c4095bc221b0982f9fe1e89be)
@@ -56,7 +56,5 @@
  * @retval EOK if successful.
  * @retval EINVAL if no HID device is given.
- * @return Other value inherited from one of functions 
- *         usb_pipe_start_session(), usb_pipe_end_session(),
- *         usb_control_request_set().
+ * @return Other value inherited from function usb_control_request_set().
  */
 int usbhid_req_set_report(usb_pipe_t *ctrl_pipe, int iface_no,
@@ -79,12 +77,5 @@
 	 */
 	
-	int rc, sess_rc;
-	
-	sess_rc = usb_pipe_start_session(ctrl_pipe);
-	if (sess_rc != EOK) {
-		usb_log_warning("Failed to start a session: %s.\n",
-		    str_error(sess_rc));
-		return sess_rc;
-	}
+	int rc;
 	
 	uint16_t value = 0;
@@ -97,16 +88,8 @@
 	    USB_HIDREQ_SET_REPORT, value, iface_no, buffer, buf_size);
 
-	sess_rc = usb_pipe_end_session(ctrl_pipe);
-
-	if (rc != EOK) {
-		usb_log_warning("Error sending output report to the keyboard: "
-		    "%s.\n", str_error(rc));
-		return rc;
-	}
-
-	if (sess_rc != EOK) {
-		usb_log_warning("Error closing session: %s.\n",
-		    str_error(sess_rc));
-		return sess_rc;
+	if (rc != EOK) {
+		usb_log_warning("Error sending output report to the keyboard: "
+		    "%s.\n", str_error(rc));
+		return rc;
 	}
 	
@@ -123,7 +106,5 @@
  * @retval EOK if successful.
  * @retval EINVAL if no HID device is given.
- * @return Other value inherited from one of functions 
- *         usb_pipe_start_session(), usb_pipe_end_session(),
- *         usb_control_request_set().
+ * @return Other value inherited from function usb_control_request_set().
  */
 int usbhid_req_set_protocol(usb_pipe_t *ctrl_pipe, int iface_no,
@@ -146,12 +127,5 @@
 	 */
 	
-	int rc, sess_rc;
-	
-	sess_rc = usb_pipe_start_session(ctrl_pipe);
-	if (sess_rc != EOK) {
-		usb_log_warning("Failed to start a session: %s.\n",
-		    str_error(sess_rc));
-		return sess_rc;
-	}
+	int rc;
 
 	usb_log_debug("Sending Set_Protocol request to the device ("
@@ -162,16 +136,8 @@
 	    USB_HIDREQ_SET_PROTOCOL, protocol, iface_no, NULL, 0);
 
-	sess_rc = usb_pipe_end_session(ctrl_pipe);
-
-	if (rc != EOK) {
-		usb_log_warning("Error sending output report to the keyboard: "
-		    "%s.\n", str_error(rc));
-		return rc;
-	}
-
-	if (sess_rc != EOK) {
-		usb_log_warning("Error closing session: %s.\n",
-		    str_error(sess_rc));
-		return sess_rc;
+	if (rc != EOK) {
+		usb_log_warning("Error sending output report to the keyboard: "
+		    "%s.\n", str_error(rc));
+		return rc;
 	}
 	
@@ -189,7 +155,5 @@
  * @retval EOK if successful.
  * @retval EINVAL if no HID device is given.
- * @return Other value inherited from one of functions 
- *         usb_pipe_start_session(), usb_pipe_end_session(),
- *         usb_control_request_set().
+ * @return Other value inherited from function usb_control_request_set().
  */
 int usbhid_req_set_idle(usb_pipe_t *ctrl_pipe, int iface_no, uint8_t duration)
@@ -211,12 +175,5 @@
 	 */
 	
-	int rc, sess_rc;
-	
-	sess_rc = usb_pipe_start_session(ctrl_pipe);
-	if (sess_rc != EOK) {
-		usb_log_warning("Failed to start a session: %s.\n",
-		    str_error(sess_rc));
-		return sess_rc;
-	}
+	int rc;
 
 	usb_log_debug("Sending Set_Idle request to the device ("
@@ -229,16 +186,8 @@
 	    USB_HIDREQ_SET_IDLE, value, iface_no, NULL, 0);
 
-	sess_rc = usb_pipe_end_session(ctrl_pipe);
-
-	if (rc != EOK) {
-		usb_log_warning("Error sending output report to the keyboard: "
-		    "%s.\n", str_error(rc));
-		return rc;
-	}
-
-	if (sess_rc != EOK) {
-		usb_log_warning("Error closing session: %s.\n",
-		    str_error(sess_rc));
-		return sess_rc;
+	if (rc != EOK) {
+		usb_log_warning("Error sending output report to the keyboard: "
+		    "%s.\n", str_error(rc));
+		return rc;
 	}
 	
@@ -259,7 +208,5 @@
  * @retval EOK if successful.
  * @retval EINVAL if no HID device is given.
- * @return Other value inherited from one of functions 
- *         usb_pipe_start_session(), usb_pipe_end_session(),
- *         usb_control_request_set().
+ * @return Other value inherited from function usb_control_request_set().
  */
 int usbhid_req_get_report(usb_pipe_t *ctrl_pipe, int iface_no, 
@@ -283,12 +230,5 @@
 	 */
 	
-	int rc, sess_rc;
-	
-	sess_rc = usb_pipe_start_session(ctrl_pipe);
-	if (sess_rc != EOK) {
-		usb_log_warning("Failed to start a session: %s.\n",
-		    str_error(sess_rc));
-		return sess_rc;
-	}
+	int rc;
 
 	uint16_t value = 0;
@@ -302,16 +242,8 @@
 	    actual_size);
 
-	sess_rc = usb_pipe_end_session(ctrl_pipe);
-
-	if (rc != EOK) {
-		usb_log_warning("Error sending output report to the keyboard: "
-		    "%s.\n", str_error(rc));
-		return rc;
-	}
-
-	if (sess_rc != EOK) {
-		usb_log_warning("Error closing session: %s.\n",
-		    str_error(sess_rc));
-		return sess_rc;
+	if (rc != EOK) {
+		usb_log_warning("Error sending output report to the keyboard: "
+		    "%s.\n", str_error(rc));
+		return rc;
 	}
 	
@@ -328,7 +260,5 @@
  * @retval EOK if successful.
  * @retval EINVAL if no HID device is given.
- * @return Other value inherited from one of functions 
- *         usb_pipe_start_session(), usb_pipe_end_session(),
- *         usb_control_request_set().
+ * @return Other value inherited from function usb_control_request_set().
  */
 int usbhid_req_get_protocol(usb_pipe_t *ctrl_pipe, int iface_no, 
@@ -351,12 +281,5 @@
 	 */
 	
-	int rc, sess_rc;
-	
-	sess_rc = usb_pipe_start_session(ctrl_pipe);
-	if (sess_rc != EOK) {
-		usb_log_warning("Failed to start a session: %s.\n",
-		    str_error(sess_rc));
-		return sess_rc;
-	}
+	int rc;	
 
 	usb_log_debug("Sending Get_Protocol request to the device ("
@@ -370,16 +293,8 @@
 	    USB_HIDREQ_GET_PROTOCOL, 0, iface_no, buffer, 1, &actual_size);
 
-	sess_rc = usb_pipe_end_session(ctrl_pipe);
-
-	if (rc != EOK) {
-		usb_log_warning("Error sending output report to the keyboard: "
-		    "%s.\n", str_error(rc));
-		return rc;
-	}
-
-	if (sess_rc != EOK) {
-		usb_log_warning("Error closing session: %s.\n",
-		    str_error(sess_rc));
-		return sess_rc;
+	if (rc != EOK) {
+		usb_log_warning("Error sending output report to the keyboard: "
+		    "%s.\n", str_error(rc));
+		return rc;
 	}
 	
@@ -427,12 +342,5 @@
 	 */
 	
-	int rc, sess_rc;
-	
-	sess_rc = usb_pipe_start_session(ctrl_pipe);
-	if (sess_rc != EOK) {
-		usb_log_warning("Failed to start a session: %s.\n",
-		    str_error(sess_rc));
-		return sess_rc;
-	}
+	int rc;
 
 	usb_log_debug("Sending Get_Idle request to the device ("
@@ -448,16 +356,8 @@
 	    &actual_size);
 
-	sess_rc = usb_pipe_end_session(ctrl_pipe);
-
-	if (rc != EOK) {
-		usb_log_warning("Error sending output report to the keyboard: "
-		    "%s.\n", str_error(rc));
-		return rc;
-	}
-
-	if (sess_rc != EOK) {
-		usb_log_warning("Error closing session: %s.\n",
-		    str_error(sess_rc));
-		return sess_rc;
+	if (rc != EOK) {
+		usb_log_warning("Error sending output report to the keyboard: "
+		    "%s.\n", str_error(rc));
+		return rc;
 	}