nvme-pci: split metadata handling from nvme_map_data / nvme_unmap_data

This prepares for some bigger changes to the data mapping helpers.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
This commit is contained in:
Christoph Hellwig 2019-03-03 09:46:28 -07:00
commit 4aedb70543