| From | Luis Henriques <> | Subject | [PATCH 3.16.y-ckt 110/142] IB/core: Use GRH when the path hop-limit > 0 | Date | Tue, 22 Mar 2016 10:40:39 +0000 |
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3.16.7-ckt26 -stable review patch. If anyone has any objections, please let me know.
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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> [ luis: backported to 3.16: adjusted context ] Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- drivers/infiniband/core/sa_query.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/infiniband/core/sa_query.c b/drivers/infiniband/core/sa_query.c index 233eaf541f55..3ca38f9ad26a 100644 --- a/drivers/infiniband/core/sa_query.c +++ b/drivers/infiniband/core/sa_query.c @@ -542,7 +542,7 @@ int ib_init_ah_from_path(struct ib_device *device, u8 port_num, 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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