diff --git a/drivers/staging/greybus/hd.c b/drivers/staging/greybus/hd.c
index f64b592187c0..52388257d3d2 100644
--- a/drivers/staging/greybus/hd.c
+++ b/drivers/staging/greybus/hd.c
@@ -54,6 +54,14 @@ int gb_hd_cport_reserve(struct gb_host_device *hd, u16 cport_id)
 }
 EXPORT_SYMBOL_GPL(gb_hd_cport_reserve);
 
+void gb_hd_cport_release_reserved(struct gb_host_device *hd, u16 cport_id)
+{
+	struct ida *id_map = &hd->cport_id_map;
+
+	ida_simple_remove(id_map, cport_id);
+}
+EXPORT_SYMBOL_GPL(gb_hd_cport_release_reserved);
+
 /* Locking: Caller guarantees serialisation */
 int gb_hd_cport_allocate(struct gb_host_device *hd, int cport_id,
 				unsigned long flags)
diff --git a/drivers/staging/greybus/hd.h b/drivers/staging/greybus/hd.h
index 8510816c1796..ad229622654e 100644
--- a/drivers/staging/greybus/hd.h
+++ b/drivers/staging/greybus/hd.h
@@ -61,6 +61,7 @@ struct gb_host_device {
 #define to_gb_host_device(d) container_of(d, struct gb_host_device, dev)
 
 int gb_hd_cport_reserve(struct gb_host_device *hd, u16 cport_id);
+void gb_hd_cport_release_reserved(struct gb_host_device *hd, u16 cport_id);
 int gb_hd_cport_allocate(struct gb_host_device *hd, int cport_id,
 					unsigned long flags);
 void gb_hd_cport_release(struct gb_host_device *hd, u16 cport_id);