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Commit 6c2f7619 authored by Shiraz Saleem's avatar Shiraz Saleem Committed by Doug Ledford
Browse files

RDMA/i40iw: Fix for using one sge for RDMA READ 



A check is added to validate the requested sge number.
iWARP doesn't support multiple sg elements for
RDMA READ work requests.

Signed-off-by: default avatarTatyana Nikolova <tatyana.e.nikolova@intel.com>
Signed-off-by: default avatarFaisal Latif <faisal.latif@intel.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent df2d96c3

drivers/infiniband/hw/i40iw/i40iw_verbs.c

+5 −1
Original line number Diff line number Diff line
@@ -74,7 +74,7 @@ static int i40iw_query_device(struct ib_device *ibdev, 
	props->max_cqe = iwdev->max_cqe;

	props->max_mr = iwdev->max_mr;

	props->max_pd = iwdev->max_pd;

	props->max_sge_rd = 1;

	props->max_sge_rd = I40IW_MAX_SGE_RD;

	props->max_qp_rd_atom = I40IW_MAX_IRD_SIZE;

	props->max_qp_init_rd_atom = props->max_qp_rd_atom;

	props->atomic_cap = IB_ATOMIC_NONE;
@@ -2117,6 +2117,10 @@ static int i40iw_post_send(struct ib_qp *ibqp, 
			inv_stag = true;

			/* fall-through*/

		case IB_WR_RDMA_READ:

			if (ib_wr->num_sge > I40IW_MAX_SGE_RD) {

				err = -EINVAL;

				break;

			}

			info.op_type = I40IW_OP_TYPE_RDMA_READ;

			info.op.rdma_read.rem_addr.tag_off = rdma_wr(ib_wr)->remote_addr;

			info.op.rdma_read.rem_addr.stag = rdma_wr(ib_wr)->rkey;