[PATCH AUTOSEL for 4.14 034/100] RDMA/cma: Make sure that PSN is not over max allowed

Sasha Levin
2018-01-28T23:12:17Z

From: Moni Shoua <monis@mellanox.com>

[ Upstream commit 23a9cd2ad90543e9da3786878d2b2729c095439d ]

This patch limits the initial value for PSN to 24 bits as
spec requires.

Signed-off-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Mukesh Kacker <mukesh.kacker@oracle.com>
Signed-off-by: Daniel Jurgens <danielj@mellanox.com>
Reviewed-by: Parav Pandit <parav@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>
---
drivers/infiniband/core/cma.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
index fa79c7076ccd..09063f0d86d2 100644
--- a/drivers/infiniband/core/cma.c
+++ b/drivers/infiniband/core/cma.c
@@ -801,6 +801,7 @@ struct rdma_cm_id *rdma_create_id(struct net *net,
INIT_LIST_HEAD(&id_priv->mc_list);
get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
id_priv->id.route.addr.dev_addr.net = get_net(net);
+ id_priv->seq_num &= 0x00ffffff;

return &id_priv->id;
}
--
2.11.0