Index: uspace/lib/usbdev/src/devdrv.c
===================================================================
--- uspace/lib/usbdev/src/devdrv.c	(revision ab27e01f2b4de3908d5aa4b43a060da6369f054d)
+++ uspace/lib/usbdev/src/devdrv.c	(revision b77931df1aa579da8e6f768a1ab15659652415e5)
@@ -361,9 +361,4 @@
 	/* Now allocate and fully initialize. */
 	for (i = 0; i < pipe_count; i++) {
-		pipes[i].pipe = malloc(sizeof(usb_pipe_t));
-		if (pipes[i].pipe == NULL) {
-			rc = ENOMEM;
-			goto rollback_free_only;
-		}
 		pipes[i].description = endpoints[i];
 		pipes[i].interface_no = interface_no;
@@ -392,5 +387,5 @@
 	for (i = 0; i < pipe_count; i++) {
 		if (pipes[i].present) {
-			rc = usb_pipe_register(pipes[i].pipe,
+			rc = usb_pipe_register(&pipes[i].pipe,
 			    pipes[i].descriptor->poll_interval, &hc_conn);
 			if (rc != EOK) {
@@ -420,5 +415,5 @@
 	for (i = 0; i < pipe_count; i++) {
 		if (pipes[i].present) {
-			usb_pipe_unregister(pipes[i].pipe, &hc_conn);
+			usb_pipe_unregister(&pipes[i].pipe, &hc_conn);
 		}
 	}
@@ -434,9 +429,4 @@
 	 */
 rollback_free_only:
-	for (i = 0; i < pipe_count; i++) {
-		if (pipes[i].pipe != NULL) {
-			free(pipes[i].pipe);
-		}
-	}
 	free(pipes);
 
@@ -480,6 +470,5 @@
 		    i, pipes[i].present ? "" : "not ");
 		if (pipes[i].present)
-			usb_pipe_unregister(pipes[i].pipe, &hc_conn);
-		free(pipes[i].pipe);
+			usb_pipe_unregister(&pipes[i].pipe, &hc_conn);
 	}
 
Index: uspace/lib/usbdev/src/devpoll.c
===================================================================
--- uspace/lib/usbdev/src/devpoll.c	(revision ab27e01f2b4de3908d5aa4b43a060da6369f054d)
+++ uspace/lib/usbdev/src/devpoll.c	(revision b77931df1aa579da8e6f768a1ab15659652415e5)
@@ -73,5 +73,5 @@
 
 	usb_pipe_t *pipe
-	    = polling_data->dev->pipes[polling_data->pipe_index].pipe;
+	    = &polling_data->dev->pipes[polling_data->pipe_index].pipe;
 	
 	if (polling_data->debug > 0) {
@@ -208,6 +208,6 @@
 		return EINVAL;
 	}
-	if ((dev->pipes[pipe_index].pipe->transfer_type != USB_TRANSFER_INTERRUPT)
-	    || (dev->pipes[pipe_index].pipe->direction != USB_DIRECTION_IN)) {
+	if ((dev->pipes[pipe_index].pipe.transfer_type != USB_TRANSFER_INTERRUPT)
+	    || (dev->pipes[pipe_index].pipe.direction != USB_DIRECTION_IN)) {
 		return EINVAL;
 	}
@@ -254,6 +254,6 @@
 		return EINVAL;
 	}
-	if ((dev->pipes[pipe_index].pipe->transfer_type != USB_TRANSFER_INTERRUPT)
-	    || (dev->pipes[pipe_index].pipe->direction != USB_DIRECTION_IN)) {
+	if ((dev->pipes[pipe_index].pipe.transfer_type != USB_TRANSFER_INTERRUPT)
+	    || (dev->pipes[pipe_index].pipe.direction != USB_DIRECTION_IN)) {
 		return EINVAL;
 	}
Index: uspace/lib/usbdev/src/pipesinit.c
===================================================================
--- uspace/lib/usbdev/src/pipesinit.c	(revision ab27e01f2b4de3908d5aa4b43a060da6369f054d)
+++ uspace/lib/usbdev/src/pipesinit.c	(revision b77931df1aa579da8e6f768a1ab15659652415e5)
@@ -192,12 +192,9 @@
 	}
 
-	if (ep_mapping->pipe == NULL) {
-		return EBADMEM;
-	}
 	if (ep_mapping->present) {
 		return EEXISTS;
 	}
 
-	int rc = usb_pipe_initialize(ep_mapping->pipe, wire,
+	int rc = usb_pipe_initialize(&ep_mapping->pipe, wire,
 	    ep_no, description.transfer_type, endpoint->max_packet_size,
 	    description.direction);
@@ -254,5 +251,5 @@
  *
  * The mapping array is expected to conform to following rules:
- * - @c pipe must point to already allocated structure with uninitialized pipe
+ * - @c pipe must be uninitialized pipe
  * - @c description must point to prepared endpoint description
  * - @c descriptor does not need to be initialized (will be overwritten)
@@ -297,9 +294,6 @@
 	}
 
-	/*
-	 * Go through the mapping and set all endpoints to not present.
-	 */
-	size_t i;
-	for (i = 0; i < mapping_count; i++) {
+	/* Go through the mapping and set all endpoints to not present. */
+	for (size_t i = 0; i < mapping_count; i++) {
 		mapping[i].present = false;
 		mapping[i].descriptor = NULL;
@@ -307,7 +301,5 @@
 	}
 
-	/*
-	 * Prepare the descriptor parser.
-	 */
+	/* Prepare the descriptor parser. */
 	const usb_dp_parser_t dp_parser = {
 		.nesting = descriptor_nesting