[ekohl] 48722: [USETUP] Allocate a drive layout buffer that is large enough to keep a primary partition table (4 partition entries) plus 26 logical drives (2 partition entries each). Total 56 parti...

Author: ekohl
Date: Tue Sep  7 15:21:06 2010
New Revision: 48722

URL: http://svn.reactos.org/svn/reactos?rev=48722&view=rev
Log:
[USETUP]
Allocate a drive layout buffer that is large enough to keep a primary partition table (4
partition entries) plus 26 logical drives (2 partition entries each). Total 56 partition
entries. This should be enough for everybody until we support GPT partition tables. ;-)
See issue #5270 for more details.

Modified:
    trunk/reactos/base/setup/usetup/partlist.c

Modified: trunk/reactos/base/setup/usetup/partlist.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/base/setup/usetup/partlist…
==============================================================================
--- trunk/reactos/base/setup/usetup/partlist.c [iso-8859-1] (original)
+++ trunk/reactos/base/setup/usetup/partlist.c [iso-8859-1] Tue Sep  7 15:21:06 2010
@@ -701,6 +701,7 @@
   ULONG i;
   PLIST_ENTRY ListEntry;
   PBIOSDISKENTRY BiosDiskEntry;
+  ULONG LayoutBufferSize;
 
   Status = NtDeviceIoControlFile (FileHandle,
                                   NULL,
@@ -870,9 +871,15 @@
 
   InsertAscendingList(&List->DiskListHead, DiskEntry, DISKENTRY, ListEntry,
BiosDiskNumber);
 
+  /*
+   * Allocate a buffer for 26 logical drives (2 entries each == 52) 
+   * plus the main partiton table (4 entries). Total 56 entries.
+   */
+  LayoutBufferSize = sizeof(DRIVE_LAYOUT_INFORMATION) +
+                     ((56 - ANYSIZE_ARRAY) * sizeof(PARTITION_INFORMATION));
   LayoutBuffer = (DRIVE_LAYOUT_INFORMATION*)RtlAllocateHeap (ProcessHeap,
                   0,
-                  8192);
+                  LayoutBufferSize);
   if (LayoutBuffer == NULL)
   {
     return;
@@ -887,7 +894,7 @@
                                   NULL,
                                   0,
                                   LayoutBuffer,
-                                  8192);
+                                  LayoutBufferSize);
   if (NT_SUCCESS (Status))
   {
     if (LayoutBuffer->PartitionCount == 0)