[tfaber] 62554: [NTOS:PO] - Fix symbolic link name handling in PopAddRemoveSysCapsCallback. Fixes ACPI power button. CORE-8017 #resolve

Author: tfaber
Date: Sun Mar 23 17:33:01 2014
New Revision: 62554

URL: http://svn.reactos.org/svn/reactos?rev=62554&view=rev
Log:
[NTOS:PO]
- Fix symbolic link name handling in PopAddRemoveSysCapsCallback. Fixes ACPI power button.
CORE-8017 #resolve

Modified:
    trunk/reactos/ntoskrnl/io/iomgr/deviface.c
    trunk/reactos/ntoskrnl/po/events.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] Sun Mar 23 17:33:01 2014
@@ -739,7 +739,7 @@
             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 @@
     }

/* Add final NULL to ReturnBuffer */
+    NT_ASSERT(ReturnBuffer.Length <= ReturnBuffer.MaximumLength);
     if (ReturnBuffer.Length >= ReturnBuffer.MaximumLength)
     {
         PWSTR NewBuffer;

Modified: trunk/reactos/ntoskrnl/po/events.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/po/events.c?rev=62...
==============================================================================
--- trunk/reactos/ntoskrnl/po/events.c	[iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/po/events.c	[iso-8859-1] Sun Mar 23 17:33:01 2014
@@ -162,8 +162,6 @@
    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 @@
    {
    	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 @@
    		&IoStatusBlock,
    		FILE_SHARE_READ | FILE_SHARE_WRITE,
    		0);
-        RtlFreeUnicodeString(&DeviceName);
    	if (!NT_SUCCESS(Status))
    	{
    		DPRINT1("ZwOpenFile() failed with status 0x%08lx\n", Status);