From f20076daaf8509e815a37fd0cb5453b9c3b9a79d Mon Sep 17 00:00:00 2001
From: jcarsey <jcarsey@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Tue, 19 Apr 2011 16:55:51 +0000
Subject: [PATCH] fix user input validation for time command.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11567 6f19259b-4bc3-4df7-8a09-765794883524
---
 ShellPkg/Library/UefiShellLevel2CommandsLib/TimeDate.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/ShellPkg/Library/UefiShellLevel2CommandsLib/TimeDate.c b/ShellPkg/Library/UefiShellLevel2CommandsLib/TimeDate.c
index 780b39e2fd..abefee3f3a 100644
--- a/ShellPkg/Library/UefiShellLevel2CommandsLib/TimeDate.c
+++ b/ShellPkg/Library/UefiShellLevel2CommandsLib/TimeDate.c
@@ -298,7 +298,7 @@ CheckAndSetTime (
   if (TimeString != NULL && !InternalIsTimeLikeString(TimeString, L':', 1, 2, FALSE)) {
     return (SHELL_INVALID_PARAMETER);
   }
-  if (((Daylight & (EFI_TIME_IN_DAYLIGHT|EFI_TIME_ADJUST_DAYLIGHT)) != Daylight)) {
+  if (Daylight != 0xFF &&((Daylight & (EFI_TIME_IN_DAYLIGHT|EFI_TIME_ADJUST_DAYLIGHT)) != Daylight)) {
     return (SHELL_INVALID_PARAMETER);
   }
 
@@ -341,7 +341,9 @@ CheckAndSetTime (
     TheTime.TimeZone = Tz;
   }
 
-  TheTime.Daylight = Daylight;
+  if (Daylight != 0xFF) {
+    TheTime.Daylight = Daylight;
+  }
 
   Status = gRT->SetTime(&TheTime);