From da1577b24a4964dfbfcf35f65631cbaa8b7b8ded Mon Sep 17 00:00:00 2001
From: vit9696 <vit9696@users.noreply.github.com>
Date: Thu, 23 Apr 2020 18:46:25 +0300
Subject: [PATCH] OcDebugLogLib: Do not attempt file logging at high TPL

---
 Library/OcDebugLogLib/OcLog.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/Library/OcDebugLogLib/OcLog.c b/Library/OcDebugLogLib/OcLog.c
index 5a3320c8..dbbffba7 100755
--- a/Library/OcDebugLogLib/OcLog.c
+++ b/Library/OcDebugLogLib/OcLog.c
@@ -291,12 +291,14 @@ OcLogAddEntry  (
     // I know it is slow, but fixed size write is more reliable with broken FAT32 driver.
     //
     if ((OcLog->Options & OC_LOG_FILE) != 0 && OcLog->FileSystem != NULL) {
-      SetFileData (
-        OcLog->FileSystem,
-        OcLog->FilePath,
-        Private->AsciiBuffer,
-        (UINT32) Private->AsciiBufferSize
-        );
+      if (EfiGetCurrentTpl () <= TPL_CALLBACK) {
+        SetFileData (
+          OcLog->FileSystem,
+          OcLog->FilePath,
+          Private->AsciiBuffer,
+          (UINT32) Private->AsciiBufferSize
+          );
+      }
     }
 
     //