diff options
| author | Sagi Grimberg <sagi@grimberg.me> | 2021-05-28 04:16:38 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2021-05-31 09:06:11 +0300 |
| commit | 12b2aaadb6d5ef77434e8db21f469f46fe2d392e (patch) | |
| tree | 4a0c4f713f0ce5fa11b46b5de367fe2b014c7b39 /drivers | |
| parent | a4b58f1721eb4d7d27e0fdcaba60d204248dcd25 (diff) | |
| download | linux-12b2aaadb6d5ef77434e8db21f469f46fe2d392e.tar.xz | |
nvme-rdma: fix in-casule data send for chained sgls
We have only 2 inline sg entries and we allow 4 sg entries for the send
wr sge. Larger sgls entries will be chained. However when we build
in-capsule send wr sge, we iterate without taking into account that the
sgl may be chained and still fit in-capsule (which can happen if the sgl
is bigger than 2, but lower-equal to 4).
Fix in-capsule data mapping to correctly iterate chained sgls.
Fixes: 38e1800275d3 ("nvme-rdma: Avoid preallocating big SGL for data")
Reported-by: Walker, Benjamin <benjamin.walker@intel.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/nvme/host/rdma.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c index 37943dc4c2c1..4697a94c0945 100644 --- a/drivers/nvme/host/rdma.c +++ b/drivers/nvme/host/rdma.c @@ -1320,16 +1320,17 @@ static int nvme_rdma_map_sg_inline(struct nvme_rdma_queue *queue, int count) { struct nvme_sgl_desc *sg = &c->common.dptr.sgl; - struct scatterlist *sgl = req->data_sgl.sg_table.sgl; struct ib_sge *sge = &req->sge[1]; + struct scatterlist *sgl; u32 len = 0; int i; - for (i = 0; i < count; i++, sgl++, sge++) { + for_each_sg(req->data_sgl.sg_table.sgl, sgl, count, i) { sge->addr = sg_dma_address(sgl); sge->length = sg_dma_len(sgl); sge->lkey = queue->device->pd->local_dma_lkey; len += sge->length; + sge++; } sg->addr = cpu_to_le64(queue->ctrl->ctrl.icdoff); |