Address-of operator cannot return NULL.

Link: https://lore.kernel.org/r/20211101232825.2350233-3-ipylypiv@google.comReviewed-by: Vishakha Channapattan <vishakhavc@google.com>
Acked-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Igor Pylypiv <ipylypiv@google.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>