If a user queries the pointer info on an invalid pointer,
hsaKmtQueryPointerInfo will return error or unknown pointer. The other
fields in HsaPointerInfo are invalid, so we do not return them to the
user.
Also removing the assert and returning unknown pointer instead. As the
assert will not trigger in release builds.
hsaKmtQueryPointerInfo may also return unknown pointer for userptrs as
they are not always tracked by thunk. Adjusting code to still treat
these pointers as valid in this case.
Change-Id: Idf5cd8b61cd532d31b072f449839d223369bb138
David Yat Sin
18547173e9