diff --git a/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/port/xhci/xhci.c b/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/port/xhci/xhci.c
index 41c1a9c1b..accd06a45 100644
--- a/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/port/xhci/xhci.c
+++ b/Ubiquitous/XiZi_AIoT/services/drivers/usb/components/port/xhci/xhci.c
@@ -287,7 +287,8 @@ static unsigned int xhci_extended_capability ( struct xhci_host *xhci,
 
 		/* Locate first or next capability as applicable */
 		if ( offset ) {
-			xecp = readl ( xhci->cap + offset );
+	//		xecp = readl ( xhci->cap + offset );
+			xecp = readl ( xhci->cap_addr + offset );
 			next = XHCI_XECP_NEXT ( xecp );
 		} else {
 			next = xhci->xecp;
@@ -297,7 +298,9 @@ static unsigned int xhci_extended_capability ( struct xhci_host *xhci,
 		offset += next;
 
 		/* Check if this is the requested capability */
-		xecp = readl ( xhci->cap + offset );
+//		xecp = readl ( xhci->cap + offset );
+		xecp = readl ( xhci->cap_addr + offset );
+
 		if ( XHCI_XECP_ID ( xecp ) == id )
 			return offset;
 	}