From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, "Or Gerlitz" , "Jason Gunthorpe" , "Doug Ledford" Date: Tue, 29 Mar 2016 20:18:22 +0100 Message-ID: Subject: [PATCH 3.2 54/62] IB/core: Use GRH when the path hop-limit > 0 In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.2.79-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Or Gerlitz 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 Reviewed-by: Jason Gunthorpe Signed-off-by: Doug Ledford [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings --- 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;