diff options
| author | Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> | 2019-02-20 20:13:34 -0800 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2019-02-21 06:39:20 -0700 |
| commit | 34e08191b146a363d72be1a488d55ecdc01a5c7d (patch) | |
| tree | 18e2e1a1dc21881e727c4309121e0b1a9bce043d /drivers/nvme | |
| parent | 77141dc6ceffdbf4dd3470911c838309e23cd55c (diff) | |
nvme-rdma: use nr_phys_segments when map rq to sgl
Use blk_rq_nr_phys_segments() instead of blk_rq_payload_bytes() to check
if a command contains data to be mapped. This fixes the case where
a struct request contains LBAs, but it has no payload, such as
Write Zeroes support.
Fixes: 6e02318eaea5 ("nvme: add support for the Write Zeroes command")
Reported-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Tested-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/nvme')
| -rw-r--r-- | drivers/nvme/host/rdma.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c index 7c0d29185249..11a5ecae78c8 100644 --- a/drivers/nvme/host/rdma.c +++ b/drivers/nvme/host/rdma.c @@ -1142,7 +1142,7 @@ static void nvme_rdma_unmap_data(struct nvme_rdma_queue *queue, struct nvme_rdma_device *dev = queue->device; struct ib_device *ibdev = dev->dev; - if (!blk_rq_payload_bytes(rq)) + if (!blk_rq_nr_phys_segments(rq)) return; if (req->mr) { @@ -1265,7 +1265,7 @@ static int nvme_rdma_map_data(struct nvme_rdma_queue *queue, c->common.flags |= NVME_CMD_SGL_METABUF; - if (!blk_rq_payload_bytes(rq)) + if (!blk_rq_nr_phys_segments(rq)) return nvme_rdma_set_sg_null(c); req->sg_table.sgl = req->first_sgl; |