From: andrewfish <andrewfish@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Thu, 11 Feb 2010 03:21:18 +0000 (+0000)
Subject: Fix issue with making a seek to zero on an FV file legal.
X-Git-Tag: edk2-stable201903~16357
X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=commitdiff_plain;h=127fd07c83470636318bc4d5fa7cc6188abfd39b

Fix issue with making a seek to zero on an FV file legal.


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9979 6f19259b-4bc3-4df7-8a09-765794883524
---

diff --git a/EmbeddedPkg/Library/EfiFileLib/EfiFileLib.c b/EmbeddedPkg/Library/EfiFileLib/EfiFileLib.c
index 2d53368c9f..a68fbf0998 100644
--- a/EmbeddedPkg/Library/EfiFileLib/EfiFileLib.c
+++ b/EmbeddedPkg/Library/EfiFileLib/EfiFileLib.c
@@ -1169,9 +1169,11 @@ EfiSeek (
 
   if (File->Type == EfiOpenLoadFile || File->Type == EfiOpenFirmwareVolume) {
     if (!CompareGuid (&File->FvNameGuid, &gZeroGuid)) {
-      // LoadFile and FV do not support Seek
-      // You can seek on a raw FV device
-      return EFI_UNSUPPORTED;
+      if ((SeekType != EfiSeekStart) && (Offset != 0)) {
+        // LoadFile and FV do not support Seek
+        // You can seek on a raw FV device
+        return EFI_UNSUPPORTED;
+      }
     }
   }