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| author | Niklas Cassel <niklas.cassel@wdc.com> | 2021-04-09 20:12:55 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2021-04-15 08:12:53 +0200 |
| commit | e51183be1fa96dc6d3cd11b3c25a0f595807315e (patch) | |
| tree | 12971bc915aaf593ccd5c8bd84d8fc4e18786f06 /drivers/nvme | |
| parent | ccc1003b5b2ba9404b390f3183979f81136a3f1f (diff) | |
| download | linux-e51183be1fa96dc6d3cd11b3c25a0f595807315e.tar.bz2 | |
nvme-pci: don't simple map sgl when sgls are disabled
According to the module parameter description for sgl_threshold,
a value of 0 means that SGLs are disabled.
If SGLs are disabled, we should respect that, even for the case
where the request is made up of a single physical segment.
Fixes: 297910571f08 ("nvme-pci: optimize mapping single segment requests using SGLs")
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/nvme')
| -rw-r--r-- | drivers/nvme/host/pci.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index d47bb18b976a..b06e685d1250 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -854,7 +854,7 @@ static blk_status_t nvme_map_data(struct nvme_dev *dev, struct request *req, return nvme_setup_prp_simple(dev, req, &cmnd->rw, &bv); - if (iod->nvmeq->qid && + if (iod->nvmeq->qid && sgl_threshold && dev->ctrl.sgls & ((1 << 0) | (1 << 1))) return nvme_setup_sgl_simple(dev, req, &cmnd->rw, &bv); |