If we don't end up doing the checks in the block layer:
+ /*
+ * Ensure that nothing has been sent which cannot be executed
+ * atomically.
+ */
+ if (req->cmd_flags & REQ_ATOMIC) {
+ struct nvme_ns_head *head = ns->head;
+ u32 boundary_bytes = head->atomic_boundary;
... please split the checks into a helper.
And merge them into the
previous patch.