Patch "RDMA/cma: Fix rdma_cm path querying for RoCE" has been added to the 4.15-stable tree

Patch "RDMA/cma: Fix rdma_cm path querying for RoCE" has been added to the 4.15-stable tree

[gregkh]

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;a=summary

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