We need to clear any poison when we are writing to pmem. The granularity
will be sector size. If it's less then we can't do anything about it
barring corruption.
Signed-off-by: NDave Jiang <dave.jiang@intel.com>
Reviewed-by: NVishal Verma <vishal.l.verma@intel.com>
[djbw: fixup 0-length write request to succeed]
Signed-off-by: NDan Williams <dan.j.williams@intel.com>