IB/cma: Destination and source addr families must match

The destination address in a listening rdma_id does not have an address
family. Since address family in both sides of a connection must be the
same in rdma_bind_addr() we set the address family of the destination to
the address family of the source.

This patch serves the logic in cma_port_is_unique() which requires to
know if destination address that is associated with a rdma_id is any address
(cma_zero_addr() and cma_loopback_addr()).

This can happen when port reuse is checked for a port number
that is being listened to.

Fixes: 19b752a19dce ("IB/cma: Allow port reuse for rdma_id")
Signed-off-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
index f98ec19a851a..ba60e4b5114c 100644
--- a/drivers/infiniband/core/cma.c
+++ b/drivers/infiniband/core/cma.c
@@ -3297,6 +3297,7 @@ int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
 {
         struct rdma_id_private *id_priv;
         int ret;
+        struct sockaddr  *daddr;
 
         if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
             addr->sa_family != AF_IB)
@@ -3336,6 +3337,9 @@ int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
         if (ret)
                 goto err2;
 
+        daddr = cma_dst_addr(id_priv);
+        daddr->sa_family = addr->sa_family;
+
         return 0;
 err2:
         if (id_priv->cma_dev)