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    Subject[PATCH 3.2 54/62] IB/core: Use GRH when the path hop-limit > 0
    3.2.79-rc1 review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Or Gerlitz <ogerlitz@mellanox.com>

    commit 11d8d645343efba0c975aefe7c2cf3b33c836c75 upstream.

    According to IBTA spec v1.3 section 12.7.19, QPs should use GRH when
    the path returned by the SA has hop-limit > 0. Currently, we do that
    only for the > 1 case, fix that.

    Fixes: 6d969a471ba1 ('IB/sa: Add ib_init_ah_from_path()')
    Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
    Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
    Signed-off-by: Doug Ledford <dledford@redhat.com>
    [bwh: Backported to 3.2: adjust context]
    Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
    ---
    drivers/infiniband/core/sa_query.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/drivers/infiniband/core/sa_query.c
    +++ b/drivers/infiniband/core/sa_query.c
    @@ -508,7 +508,7 @@ int ib_init_ah_from_path(struct ib_devic

    force_grh = rdma_port_get_link_layer(device, port_num) == IB_LINK_LAYER_ETHERNET;

    - if (rec->hop_limit > 1 || force_grh) {
    + if (rec->hop_limit > 0 || force_grh) {
    ah_attr->ah_flags = IB_AH_GRH;
    ah_attr->grh.dgid = rec->dgid;

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