diff --git a/repos/dde_linux/src/drivers/usb_host/dummies.c b/repos/dde_linux/src/drivers/usb_host/dummies.c
index 6b76687da1..318ed2556f 100644
--- a/repos/dde_linux/src/drivers/usb_host/dummies.c
+++ b/repos/dde_linux/src/drivers/usb_host/dummies.c
@@ -602,6 +602,21 @@ bool sg_miter_skip(struct sg_mapping_iter *miter, off_t offset) { TRACE; return
 bool sg_miter_next(struct sg_mapping_iter *miter) { TRACE; return false; }
 void sg_miter_stop(struct sg_mapping_iter *miter) { TRACE; }
 
+size_t sg_pcopy_from_buffer(struct scatterlist *sgl, unsigned int nents,
+                            const void *buf, size_t buflen, off_t skip)
+{
+	TRACE;
+	return 0;
+}
+
+
+size_t sg_pcopy_to_buffer(struct scatterlist *sgl, unsigned int nents,
+                          void *buf, size_t buflen, off_t skip)
+{
+	TRACE;
+	return 0;
+}
+
 
 /*************************
  ** linux/dma-mapping.h **
@@ -982,18 +997,6 @@ int pci_reset_function_locked(struct pci_dev *dev)
 	return -1;
 }
 
-size_t sg_pcopy_from_buffer(struct scatterlist *sgl, unsigned int nents, const void *buf, size_t buflen, off_t skip)
-{
-	TRACE_AND_STOP;
-	return -1;
-}
-
-size_t sg_pcopy_to_buffer(struct scatterlist *sgl, unsigned int nents, void *buf, size_t buflen, off_t skip)
-{
-	TRACE_AND_STOP;
-	return -1;
-}
-
 struct device_node *usb_of_get_device_node(struct usb_device *hub, int port1)
 {
 	TRACE;