Index: uspace/lib/usb/include/usb/request.h
===================================================================
--- uspace/lib/usb/include/usb/request.h	(revision 51b46f2765c1283ded00911ee29d3ce242396000)
+++ uspace/lib/usb/include/usb/request.h	(revision 3c775adb0d97de542ba248e3729edbc62cae1ea2)
@@ -106,4 +106,6 @@
 int usb_request_get_full_configuration_descriptor(usb_endpoint_pipe_t *, int,
     void *, size_t, size_t *);
+int usb_request_get_full_configuration_descriptor_alloc(usb_endpoint_pipe_t *,
+    int, void **, size_t *);
 int usb_request_set_configuration(usb_endpoint_pipe_t *, uint8_t);
 
Index: uspace/lib/usb/src/request.c
===================================================================
--- uspace/lib/usb/src/request.c	(revision 51b46f2765c1283ded00911ee29d3ce242396000)
+++ uspace/lib/usb/src/request.c	(revision 3c775adb0d97de542ba248e3729edbc62cae1ea2)
@@ -412,4 +412,69 @@
 }
 
+/** Retrieve full configuration descriptor, allocate space for it.
+ *
+ * The function takes care that full configuration descriptor is returned
+ * (i.e. the function will fail when less data then descriptor.totalLength
+ * is returned).
+ *
+ * @param[in] pipe Control endpoint pipe (session must be already started).
+ * @param[in] index Configuration index.
+ * @param[out] descriptor_ptr Where to store pointer to allocated buffer.
+ * @param[out] descriptor_size Where to store the size of the descriptor.
+ * @return Error code.
+ */
+int usb_request_get_full_configuration_descriptor_alloc(
+    usb_endpoint_pipe_t *pipe, int index,
+    void **descriptor_ptr, size_t *descriptor_size)
+{
+	int rc;
+
+	if (descriptor_ptr == NULL) {
+		return EBADMEM;
+	}
+
+	usb_standard_configuration_descriptor_t bare_config;
+	rc = usb_request_get_bare_configuration_descriptor(pipe, index,
+	    &bare_config);
+	if (rc != EOK) {
+		return rc;
+	}
+
+	if (bare_config.descriptor_type != USB_DESCTYPE_CONFIGURATION) {
+		return ENOENT;
+	}
+	if (bare_config.total_length < sizeof(bare_config)) {
+		return ELIMIT;
+	}
+
+	void *buffer = malloc(bare_config.total_length);
+	if (buffer == NULL) {
+		return ENOMEM;
+	}
+
+	size_t transferred = 0;
+	rc = usb_request_get_full_configuration_descriptor(pipe, index,
+	    buffer, bare_config.total_length, &transferred);
+	if (rc != EOK) {
+		free(buffer);
+		return rc;
+	}
+
+	if (transferred != bare_config.total_length) {
+		free(buffer);
+		return ELIMIT;
+	}
+
+	/* Everything looks okay, copy the pointers. */
+
+	*descriptor_ptr = buffer;
+
+	if (descriptor_size != NULL) {
+		*descriptor_size = bare_config.total_length;
+	}
+
+	return EOK;
+}
+
 /** Set configuration of USB device.
  *