RDMA/cxgb4: Zero out ISGL padding

The HW design requires zeroing any pad in SGLs.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

diff --git a/drivers/infiniband/hw/cxgb4/qp.c b/drivers/infiniband/hw/cxgb4/qp.c
index 4f5dd66..bdbf54d 100644 (file)
--- a/drivers/infiniband/hw/cxgb4/qp.c
+++ b/drivers/infiniband/hw/cxgb4/qp.c
@@ -263,6 +263,9 @@ static int build_immd(struct t4_sq *sq, struct fw_ri_immd *immdp,
                        rem -= len;
                }
        }
+       len = roundup(plen + sizeof *immdp, 16) - (plen + sizeof *immdp);
+       if (len)
+               memset(dstp, 0, len);
        immdp->op = FW_RI_DATA_IMMD;
        immdp->r1 = 0;
        immdp->r2 = 0;
@@ -292,6 +295,7 @@ static int build_isgl(__be64 *queue_start, __be64 *queue_end,
                if (++flitp == queue_end)
                        flitp = queue_start;
        }
+       *flitp = (__force __be64)0;
        isglp->op = FW_RI_DATA_ISGL;
        isglp->r1 = 0;
        isglp->nsge = cpu_to_be16(num_sge);