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nvme-pci: only call nvme_unmap_data for requests transferring data 

This mirrors how nvme_map_pci is called and will allow simplifying some
checks in nvme_unmap_pci later on.

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 08:52:21 -07:00
parent 7fe07d14f7
commit b15c592de3
1 changed files with 2 additions and 1 deletions
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3
drivers/nvme/host/pci.c
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@ -929,7 +929,8 @@ static void nvme_pci_complete_rq(struct request *req)
struct nvme_iod *iod = blk_mq_rq_to_pdu(req);
nvme_cleanup_cmd(req);
nvme_unmap_data(iod->nvmeq->dev, req);
if (blk_rq_nr_phys_segments(req))
nvme_unmap_data(iod->nvmeq->dev, req);
nvme_complete_rq(req);
}