[tfaber] 72016: [0.4.2] - Add a hack to avoid MmGetPhysicalAddress failures during USB transfers CORE-9224

Author: tfaber
Date: Wed Jul 27 10:55:39 2016
New Revision: 72016

URL: http://svn.reactos.org/svn/reactos?rev=72016&view=rev
Log:
[0.4.2]
- Add a hack to avoid MmGetPhysicalAddress failures during USB transfers
CORE-9224

Modified:
    branches/ros-branch-0_4_2/reactos/drivers/usb/usbehci/usb_request.cpp
    branches/ros-branch-0_4_2/reactos/drivers/usb/usbohci/usb_request.cpp

Modified: branches/ros-branch-0_4_2/reactos/drivers/usb/usbehci/usb_request.cpp
URL: http://svn.reactos.org/svn/reactos/branches/ros-branch-0_4_2/reactos/drivers...
==============================================================================
--- branches/ros-branch-0_4_2/reactos/drivers/usb/usbehci/usb_request.cpp	[iso-8859-1] (original)
+++ branches/ros-branch-0_4_2/reactos/drivers/usb/usbehci/usb_request.cpp	[iso-8859-1] Wed Jul 27 10:55:39 2016
@@ -601,6 +601,7 @@
         //
         // get address
         //
+        *(volatile char *)TransferBuffer; // HACK for CORE-9224
         Address = MmGetPhysicalAddress(TransferBuffer);

//

Modified: branches/ros-branch-0_4_2/reactos/drivers/usb/usbohci/usb_request.cpp
URL: http://svn.reactos.org/svn/reactos/branches/ros-branch-0_4_2/reactos/drivers...
==============================================================================
--- branches/ros-branch-0_4_2/reactos/drivers/usb/usbohci/usb_request.cpp	[iso-8859-1] (original)
+++ branches/ros-branch-0_4_2/reactos/drivers/usb/usbohci/usb_request.cpp	[iso-8859-1] Wed Jul 27 10:55:39 2016
@@ -771,6 +771,7 @@
         //
         // get physical page
         //
+        *(volatile char *)Buffer; // HACK for CORE-9224
         Page = MmGetPhysicalAddress(Buffer).LowPart;

//
@@ -1087,6 +1088,7 @@
     //
     // store physical address of buffer
     //
+    *(volatile char *)TransferBuffer; // HACK for CORE-9224
     CurrentDescriptor->BufferPhysical = MmGetPhysicalAddress(TransferBuffer).LowPart;
     CurrentDescriptor->LastPhysicalByteAddress = CurrentDescriptor->BufferPhysical + TransferBufferLength - 1;

@@ -1503,6 +1505,7 @@
         //
         // store physical address of buffer
         //
+        *(volatile char *)MmGetMdlVirtualAddress(m_TransferBufferMDL); // HACK for CORE-9224
         DataDescriptor->BufferPhysical = MmGetPhysicalAddress(MmGetMdlVirtualAddress(m_TransferBufferMDL)).LowPart;
         DataDescriptor->LastPhysicalByteAddress = DataDescriptor->BufferPhysical + m_TransferBufferLength - 1;