This is a note to let you know that I've just added the patch titled
RDMA/mlx5: Set GRH fields in query QP on RoCE
to the 5.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
rdma-mlx5-set-grh-fields-in-query-qp-on-roce.patch
and it can be found in the queue-5.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 2d7e3ff7b6f2c614eb21d0dc348957a47eaffb57 Mon Sep 17 00:00:00 2001
From: Aharon Landau <aharonl@xxxxxxxxxxxx>
Date: Mon, 13 Apr 2020 16:20:28 +0300
Subject: RDMA/mlx5: Set GRH fields in query QP on RoCE
From: Aharon Landau <aharonl@xxxxxxxxxxxx>
commit 2d7e3ff7b6f2c614eb21d0dc348957a47eaffb57 upstream.
GRH fields such as sgid_index, hop limit, et. are set in the QP context
when QP is created/modified.
Currently, when query QP is performed, we fill the GRH fields only if the
GRH bit is set in the QP context, but this bit is not set for RoCE. Adjust
the check so we will set all relevant data for the RoCE too.
Since this data is returned to userspace, the below is an ABI regression.
Fixes: d8966fcd4c25 ("IB/core: Use rdma_ah_attr accessor functions")
Link: https://lore.kernel.org/r/20200413132028.930109-1-leon@xxxxxxxxxx
Signed-off-by: Aharon Landau <aharonl@xxxxxxxxxxxx>
Reviewed-by: Maor Gottlieb <maorg@xxxxxxxxxxxx>
Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/infiniband/hw/mlx5/qp.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -5545,7 +5545,9 @@ static void to_rdma_ah_attr(struct mlx5_
rdma_ah_set_path_bits(ah_attr, path->grh_mlid & 0x7f);
rdma_ah_set_static_rate(ah_attr,
path->static_rate ? path->static_rate - 5 : 0);
- if (path->grh_mlid & (1 << 7)) {
+
+ if (path->grh_mlid & (1 << 7) ||
+ ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) {
u32 tc_fl = be32_to_cpu(path->tclass_flowlabel);
rdma_ah_set_grh(ah_attr, NULL,
Patches currently in stable-queue which might be from aharonl@xxxxxxxxxxxx are
queue-5.6/rdma-mlx5-set-grh-fields-in-query-qp-on-roce.patch
