filesys/cdfs: only set the Top Level IRP if locking succeed for lazy writer worker. (#209)

This avoids hitting the assert again NULL Top Level IRP later on if locking failed.

1 files changed, 6 insertions, 1 deletions

diff --git a/filesys/cdfs/resrcsup.c b/filesys/cdfs/resrcsup.c
index 86b2b91a..78f0a823 100644
--- a/filesys/cdfs/resrcsup.c
+++ b/filesys/cdfs/resrcsup.c
@@ -161,10 +161,15 @@ Return Value:
 {
     PAGED_CODE();
 
+    if (!ExAcquireResourceSharedLite( Fcb->Resource, Wait )) {
+
+        return FALSE;
+    }
+
     NT_ASSERT(IoGetTopLevelIrp() == NULL);
     IoSetTopLevelIrp((PIRP)FSRTL_CACHE_TOP_LEVEL_IRP);
 
-    return ExAcquireResourceSharedLite( Fcb->Resource, Wait );
+    return TRUE;
 }