[NTOS:PO]

- Fix symbolic link name handling in PopAddRemoveSysCapsCallback. Fixes ACPI power button.
CORE-8017 #resolve

svn path=/trunk/; revision=62554

diff --git a/reactos/ntoskrnl/io/iomgr/deviface.c b/reactos/ntoskrnl/io/iomgr/deviface.c
index 4c4f618..f43d70f 100644 (file)
--- a/reactos/ntoskrnl/io/iomgr/deviface.c
+++ b/reactos/ntoskrnl/io/iomgr/deviface.c
@@ -739,7 +739,7 @@ IoGetDeviceInterfaces(IN CONST GUID *InterfaceClassGuid,
             if (ReturnBuffer.Length + KeyName.Length + sizeof(WCHAR) > ReturnBuffer.MaximumLength)
             {
                 PWSTR NewBuffer;
-                ReturnBuffer.MaximumLength = (USHORT)max(ReturnBuffer.MaximumLength * sizeof(WCHAR),
+                ReturnBuffer.MaximumLength = (USHORT)max(2 * ReturnBuffer.MaximumLength,
                                                          (USHORT)(ReturnBuffer.Length +
                                                          KeyName.Length +
                                                          2 * sizeof(WCHAR)));
@@ -800,6 +800,7 @@ NextReferenceString:
     }
 
     /* Add final NULL to ReturnBuffer */
+    NT_ASSERT(ReturnBuffer.Length <= ReturnBuffer.MaximumLength);
     if (ReturnBuffer.Length >= ReturnBuffer.MaximumLength)
     {
         PWSTR NewBuffer;

diff --git a/reactos/ntoskrnl/po/events.c b/reactos/ntoskrnl/po/events.c
index ed549be..4e01ca1 100644 (file)
--- a/reactos/ntoskrnl/po/events.c
+++ b/reactos/ntoskrnl/po/events.c
@@ -162,8 +162,6 @@ PopAddRemoveSysCapsCallback(IN PVOID NotificationStructure,
        BOOLEAN Arrival;
        ULONG Caps;
        NTSTATUS Status;
-    UNICODE_STRING DeviceName;
-       UNICODE_STRING DeviceNamePrefix = RTL_CONSTANT_STRING(L"\\??\\");
 
        DPRINT("PopAddRemoveSysCapsCallback(%p %p)\n",
                NotificationStructure, Context);
@@ -184,20 +182,10 @@ PopAddRemoveSysCapsCallback(IN PVOID NotificationStructure,
        {
                DPRINT("Arrival of %wZ\n", Notification->SymbolicLinkName);
 
-        DeviceName.Length = 0;
-               DeviceName.MaximumLength = Notification->SymbolicLinkName->MaximumLength + DeviceNamePrefix.MaximumLength;
-               DeviceName.Buffer = ExAllocatePool(PagedPool, DeviceName.MaximumLength);
-               if (!DeviceName.Buffer) return STATUS_INSUFFICIENT_RESOURCES;
-
-               RtlCopyUnicodeString(&DeviceName, &DeviceNamePrefix);
-               RtlAppendUnicodeStringToString(&DeviceName, Notification->SymbolicLinkName);
-
-               DPRINT("Opening handle to %wZ\n", &DeviceName);
-
                /* Open the device */
                InitializeObjectAttributes(
                        &ObjectAttributes,
-                       &DeviceName,
+                       Notification->SymbolicLinkName,
                        OBJ_KERNEL_HANDLE,
                        NULL,
                        NULL);
@@ -208,7 +196,6 @@ PopAddRemoveSysCapsCallback(IN PVOID NotificationStructure,
                        &IoStatusBlock,
                        FILE_SHARE_READ | FILE_SHARE_WRITE,
                        0);
-        RtlFreeUnicodeString(&DeviceName);
                if (!NT_SUCCESS(Status))
                {
                        DPRINT1("ZwOpenFile() failed with status 0x%08lx\n", Status);