01/02: [BTRFS] Allow driver to start at first stage when no hive is present.

[Pierre Schweitzer]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=80e11516b12b19530b56b…

commit 80e11516b12b19530b56be7539ecc6af2039ed7b
Author:     Pierre Schweitzer <pierre(a)reactos.org>
AuthorDate: Wed Aug 15 16:35:05 2018 +0200
Commit:     Pierre Schweitzer <pierre(a)reactos.org>
CommitDate: Wed Aug 15 16:35:05 2018 +0200

    [BTRFS] Allow driver to start at first stage when no hive is present.
    
    Contrary to upstream, we will ignore failure when opening registry
    and will keep going.
    
    CORE-13769
---
 drivers/filesystems/btrfs/btrfs.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/filesystems/btrfs/btrfs.c b/drivers/filesystems/btrfs/btrfs.c
index 236184eafa..27a1572db8 100644
--- a/drivers/filesystems/btrfs/btrfs.c
+++ b/drivers/filesystems/btrfs/btrfs.c
@@ -5563,12 +5563,19 @@ NTSTATUS DriverEntry(_In_ PDRIVER_OBJECT DriverObject, _In_
PUNICODE_STRING Regi
 
     InitializeObjectAttributes(&oa, RegistryPath, OBJ_CASE_INSENSITIVE |
OBJ_KERNEL_HANDLE, NULL, NULL);
     Status = ZwCreateKey(&regh, KEY_QUERY_VALUE | KEY_ENUMERATE_SUB_KEYS |
KEY_NOTIFY, &oa, 0, NULL, REG_OPTION_NON_VOLATILE, &dispos);
+    /* ReactOS specific hack: allow BtrFS driver to start in 1st stage with no hive */
+#ifndef __REACTOS__
     if (!NT_SUCCESS(Status)) {
         ERR("ZwCreateKey returned %08x\n", Status);
         return Status;
     }
 
     watch_registry(regh);
+#else
+    if (NT_SUCCESS(Status)) {
+        watch_registry(regh);
+    }
+#endif
 
     Status = IoReportDetectedDevice(drvobj, InterfaceTypeUndefined, 0xFFFFFFFF,
0xFFFFFFFF,
                                     NULL, NULL, 0, &cde->buspdo);