[cgutman] 54040: [NTOSKRNL] - Fix symbolic link creation with a reference string - Audio devices start successfully again (sound still seems to be regressed however)

Author: cgutman
Date: Fri Oct  7 03:13:58 2011
New Revision: 54040

URL: http://svn.reactos.org/svn/reactos?rev=54040&view=rev
Log:
[NTOSKRNL]
- Fix symbolic link creation with a reference string
- Audio devices start successfully again (sound still seems to be regressed however)

Modified:
    trunk/reactos/ntoskrnl/io/iomgr/deviface.c

Modified: trunk/reactos/ntoskrnl/io/iomgr/deviface.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/io/iomgr/deviface…
==============================================================================
--- trunk/reactos/ntoskrnl/io/iomgr/deviface.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/io/iomgr/deviface.c [iso-8859-1] Fri Oct  7 03:13:58 2011
@@ -887,7 +887,7 @@
     ULONG StartIndex;
     OBJECT_ATTRIBUTES ObjectAttributes;
     ULONG i;
-    NTSTATUS Status;
+    NTSTATUS Status, SymLinkStatus;
     PEXTENDED_DEVOBJ_EXTENSION DeviceObjectExtension;
 
     ASSERT_IRQL_EQUAL(PASSIVE_LEVEL);
@@ -1137,25 +1137,19 @@
     }
     RtlAppendUnicodeToString(SymbolicLinkName, L"#");
     RtlAppendUnicodeStringToString(SymbolicLinkName, &GuidString);
-
-    if (ReferenceString && ReferenceString->Length)
-    {
-        RtlAppendUnicodeToString(SymbolicLinkName, L"\\");
-        RtlAppendUnicodeStringToString(SymbolicLinkName, ReferenceString);
-    }
     SymbolicLinkName->Buffer[SymbolicLinkName->Length/sizeof(WCHAR)] =
L'\0';
 
-    /* Write symbolic link name in registry */
-    SymbolicLinkName->Buffer[1] = '\\';
-    Status = ZwSetValueKey(SubKey,
-                           &SymbolicLink,
-                           0, /* TileIndex */
-                           REG_SZ,
-                           SymbolicLinkName->Buffer,
-                           SymbolicLinkName->Length);
-    if (!NT_SUCCESS(Status))
-    {
-        DPRINT1("ZwSetValueKey() failed with status 0x%08lx\n", Status);
+    /* Create symbolic link */
+    DPRINT("IoRegisterDeviceInterface(): creating symbolic link %wZ ->
%wZ\n", SymbolicLinkName, &PdoNameInfo->Name);
+    SymLinkStatus = IoCreateSymbolicLink(SymbolicLinkName, &PdoNameInfo->Name);
+
+    /* If the symbolic link already exists, return an informational success status */
+    if (SymLinkStatus == STATUS_OBJECT_NAME_COLLISION)
+        SymLinkStatus = STATUS_OBJECT_NAME_EXISTS;
+
+    if (!NT_SUCCESS(SymLinkStatus))
+    {
+        DPRINT1("IoCreateSymbolicLink() failed with status 0x%08lx\n",
SymLinkStatus);
         ZwClose(SubKey);
         ZwClose(InterfaceKey);
         ZwClose(ClassKey);
@@ -1163,26 +1157,33 @@
         ExFreePool(InterfaceKeyName.Buffer);
         ExFreePool(BaseKeyName.Buffer);
         ExFreePool(SymbolicLinkName->Buffer);
-        return Status;
+        return SymLinkStatus;
+    }
+
+    if (ReferenceString && ReferenceString->Length)
+    {
+        RtlAppendUnicodeToString(SymbolicLinkName, L"\\");
+        RtlAppendUnicodeStringToString(SymbolicLinkName, ReferenceString);
+    }
+    SymbolicLinkName->Buffer[SymbolicLinkName->Length/sizeof(WCHAR)] =
L'\0';
+
+    /* Write symbolic link name in registry */
+    SymbolicLinkName->Buffer[1] = '\\';
+    Status = ZwSetValueKey(
+        SubKey,
+        &SymbolicLink,
+        0, /* TileIndex */
+        REG_SZ,
+        SymbolicLinkName->Buffer,
+        SymbolicLinkName->Length);
+    if (!NT_SUCCESS(Status))
+    {
+        DPRINT1("ZwSetValueKey() failed with status 0x%08lx\n", Status);
+        ExFreePool(SymbolicLinkName->Buffer);
     }
     else
     {
         SymbolicLinkName->Buffer[1] = '?';
-    }
-
-    /* Create symbolic link */
-    DPRINT("IoRegisterDeviceInterface(): creating symbolic link %wZ ->
%wZ\n", SymbolicLinkName, &PdoNameInfo->Name);
-    Status = IoCreateSymbolicLink(SymbolicLinkName, &PdoNameInfo->Name);
-
-    /* If the symbolic link already exists, return an informational success status */
-    if (Status == STATUS_OBJECT_NAME_COLLISION)
-        Status = STATUS_OBJECT_NAME_EXISTS;
-
-    /* Check if it really failed */
-    if (!NT_SUCCESS(Status))
-    {
-        DPRINT1("IoCreateSymbolicLink() failed with status 0x%08lx\n",
Status);
-        ExFreePool(SymbolicLinkName->Buffer);
     }
 
     ZwClose(SubKey);
@@ -1192,7 +1193,7 @@
     ExFreePool(InterfaceKeyName.Buffer);
     ExFreePool(BaseKeyName.Buffer);
 
-    return Status;
+    return NT_SUCCESS(Status) ? SymLinkStatus : Status;
 }
 
 /*++