[Openib-windows] [PATCH] MT23108: Fix large buffer memory registration

[Fab Tillier]

Hi Leonid,

After looking into Guy's reported memory corruption, as well as symptoms seen by
Microsoft, I'm certain the memory registration code is the MT23108 driver is
broken.

The following trivial patch solves it.  Please apply as soon as possible as this
is a critical issue.

Thanks,

- Fab

Index: hw/mt23108/vapi/mlxsys/mosal/os_dep/win/mosal_iobuf.c
===================================================================
--- hw/mt23108/vapi/mlxsys/mosal/os_dep/win/mosal_iobuf.c	(revision 334)
+++ hw/mt23108/vapi/mlxsys/mosal/os_dep/win/mosal_iobuf.c	(working copy)
@@ -297,6 +297,10 @@
   MOSAL_dlist_init_head( &new_iobuf->seg_que );
   new_iobuf->seg_num = 0;
 
+  // Round the seg_va down to a page boundary so that we always get a seg_size
+  // that is an integral number of pages.
+  seg_va &= (~0 << PAGE_SHIFT);
+
   // allocate segments
   while (rdc > 0) {
   	// map a segment
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