iw_cxgb4: don't use WR keys/addrs for 0 byte reads

[karo-tx-linux.git] / drivers / infiniband / hw / cxgb4 / qp.c

diff --git a/drivers/infiniband/hw/cxgb4/qp.c b/drivers/infiniband/hw/cxgb4/qp.c
index bfc77596acbe1ec5c6d8f1346d567b4db0117297..cb7fc0d35d1d14efff512c2ef9101304532121ad 100644 (file)
--- a/drivers/infiniband/hw/cxgb4/qp.c
+++ b/drivers/infiniband/hw/cxgb4/qp.c
@@ -569,7 +569,7 @@ static int build_rdma_read(union t4_wr *wqe, struct ib_send_wr *wr, u8 *len16)
 {
        if (wr->num_sge > 1)
                return -EINVAL;
-       if (wr->num_sge) {
+       if (wr->num_sge && wr->sg_list[0].length) {
                wqe->read.stag_src = cpu_to_be32(rdma_wr(wr)->rkey);
                wqe->read.to_src_hi = cpu_to_be32((u32)(rdma_wr(wr)->remote_addr
                                                        >> 32));