This is a note to let you know that I've just added the patch titled

RDMA/cma: Fix rdma_cm path querying for RoCE

to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: rdma-cma-fix-rdma_cm-path-querying-for-roce.patch and it can be found in the queue-4.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From foo@baz Mon Apr 9 10:16:32 CEST 2018

From: Parav Pandit parav@mellanox.com Date: Mon, 8 Jan 2018 17:04:48 +0200 Subject: RDMA/cma: Fix rdma_cm path querying for RoCE

From: Parav Pandit parav@mellanox.com

[ Upstream commit 89838118a515847d3e5c904d2e022779a7173bec ]

The 'if' logic in ucma_query_path was broken with OPA was introduced and started to treat RoCE paths as as OPA paths. Invert the logic of the 'if' so only OPA paths are treated as OPA paths.

Otherwise the path records returned to rdma_cma users are mangled when in RoCE mode.

Fixes: 57520751445b ("IB/SA: Add OPA path record type") Signed-off-by: Parav Pandit parav@mellanox.com Reviewed-by: Mark Bloch markb@mellanox.com Signed-off-by: Leon Romanovsky leon@kernel.org Signed-off-by: Jason Gunthorpe jgg@mellanox.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/infiniband/core/ucma.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)

--- a/drivers/infiniband/core/ucma.c +++ b/drivers/infiniband/core/ucma.c @@ -914,13 +914,14 @@ static ssize_t ucma_query_path(struct uc

resp->path_data[i].flags = IB_PATH_GMP | IB_PATH_PRIMARY | IB_PATH_BIDIRECTIONAL; - if (rec->rec_type == SA_PATH_REC_TYPE_IB) { - ib_sa_pack_path(rec, &resp->path_data[i].path_rec); - } else { + if (rec->rec_type == SA_PATH_REC_TYPE_OPA) { struct sa_path_rec ib;

sa_convert_path_opa_to_ib(&ib, rec); ib_sa_pack_path(&ib, &resp->path_data[i].path_rec); + + } else { + ib_sa_pack_path(rec, &resp->path_data[i].path_rec); } }

Patches currently in stable-queue which might be from parav@mellanox.com are

queue-4.15/net-mlx5-fix-race-for-multiple-roce-enable.patch queue-4.15/rdma-cma-fix-rdma_cm-path-querying-for-roce.patch