1 files changed, 3 insertions, 0 deletions
diff --git a/MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2Keyboard.h b/MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2Keyboard.h
index ca1dd9b..7b4db9c 100644
--- a/MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2Keyboard.h
+++ b/MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2Keyboard.h
@@ -338,6 +338,7 @@ KeyboardEfiReset (
   @param Key     The output buffer for key value
 
   @retval EFI_SUCCESS success to read key stroke
+  @retval EFI_UNSUPPORTED  The device does not support the ability to read keystroke data.
 **/
 EFI_STATUS
 EFIAPI
@@ -441,6 +442,8 @@ KeyboardEfiResetEx (
     @retval EFI_DEVICE_ERROR      - The keystroke information was not returned due to
                             hardware errors.
     @retval EFI_INVALID_PARAMETER - KeyData is NULL.
+    @retval EFI_UNSUPPORTED       - The device does not support the ability to read
+                            keystroke data.
 
 **/
 EFI_STATUS