xnu-1228.5.20.tar.gz

[apple/xnu.git] / iokit / Kernel / IOMemoryDescriptor.cpp

diff --git a/iokit/Kernel/IOMemoryDescriptor.cpp b/iokit/Kernel/IOMemoryDescriptor.cpp
index 43321aac12c2367d21165fa7f50bbd9a230fa6fd..b86f7f65164c1496db20cbdb8298a0942185e78e 100644 (file)
--- a/iokit/Kernel/IOMemoryDescriptor.cpp
+++ b/iokit/Kernel/IOMemoryDescriptor.cpp
@@ -2429,9 +2429,9 @@ IOMemoryDescriptorMapMemEntry(vm_map_t map, ipc_port_t entry, IOOptionBits optio
     IOReturn err;
     IOMemoryDescriptorMapAllocRef ref;
 
-    ref.sharedMem      = entry;
-    ref.sourceOffset           = offset;
-    ref.options                = options;
+    ref.sharedMem       = entry;
+    ref.sourceOffset = trunc_page_64(offset);
+    ref.options                 = options;
 
     ref.size = length;