team: do RCU update path fixups
Use rcu_access_pointer and rcu_dereference_protected
to access RCU pointer by updater.
Use RCU_INIT_POINTER for NULL assignment of RCU pointer.
Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/team/team_mode_activebackup.c b/drivers/net/team/team_mode_activebackup.c
index 2fe02a8..253b8a5 100644
--- a/drivers/net/team/team_mode_activebackup.c
+++ b/drivers/net/team/team_mode_activebackup.c
@@ -61,8 +61,12 @@
static int ab_active_port_get(struct team *team, struct team_gsetter_ctx *ctx)
{
- if (ab_priv(team)->active_port)
- ctx->data.u32_val = ab_priv(team)->active_port->dev->ifindex;
+ struct team_port *active_port;
+
+ active_port = rcu_dereference_protected(ab_priv(team)->active_port,
+ lockdep_is_held(&team->lock));
+ if (active_port)
+ ctx->data.u32_val = active_port->dev->ifindex;
else
ctx->data.u32_val = 0;
return 0;