modify the implementation of GetInterface and GetConfiguration to force the high...

[mirror_edk2.git] / MdePkg / Library / UefiUsbLib / UsbDxeLib.c

diff --git a/MdePkg/Library/UefiUsbLib/UsbDxeLib.c b/MdePkg/Library/UefiUsbLib/UsbDxeLib.c
index c27fb03499151329dcb31357cb09bb7aa47d9e29..521fdd0101ae48fcb22c3f20484686c0579f8f1e 100644 (file)
--- a/MdePkg/Library/UefiUsbLib/UsbDxeLib.c
+++ b/MdePkg/Library/UefiUsbLib/UsbDxeLib.c
@@ -177,6 +177,8 @@ UsbGetInterface (
   ASSERT (AlternateSetting != NULL);\r
   ASSERT (Status != NULL);\r
 \r
+  *AlternateSetting = 0;\r
+\r
   ZeroMem (&DevReq, sizeof (EFI_USB_DEVICE_REQUEST));\r
 \r
   DevReq.RequestType  = USB_DEV_GET_INTERFACE_REQ_TYPE;\r
@@ -283,6 +285,8 @@ UsbGetConfiguration (
   ASSERT (ConfigurationValue != NULL);\r
   ASSERT (Status != NULL);\r
 \r
+  *ConfigurationValue = 0;\r
+\r
   ZeroMem (&DevReq, sizeof (EFI_USB_DEVICE_REQUEST));\r
 \r
   DevReq.RequestType  = USB_DEV_GET_CONFIGURATION_REQ_TYPE;\r