diff --git a/drivers/media/platform/rockchip/ispp/stream_v20.c b/drivers/media/platform/rockchip/ispp/stream_v20.c
index 2209e3ea6373..90c5fe8f02b4 100644
--- a/drivers/media/platform/rockchip/ispp/stream_v20.c
+++ b/drivers/media/platform/rockchip/ispp/stream_v20.c
@@ -319,9 +319,9 @@ restart_unlock:
 
 }
 
-void rkispp_module_work_event(struct rkispp_device *dev,
-			      void *buf_rd, void *buf_wr,
-			      u32 module, bool is_isr)
+static void rkispp_module_work_event(struct rkispp_device *dev,
+				     void *buf_rd, void *buf_wr,
+				     u32 module, bool is_isr)
 {
 
 	if (dev->hw_dev->is_shutdown)