net: dsa: Fix stale cpu_switch reference after unbind then bind

[mirror_ubuntu-artful-kernel.git] / net / dsa / dsa2.c

diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
index 033b3bfb63dc1887b15b3e08f00a00f70b706ec4..7796580e99ee2c57cdd5503130c8ec2e121d879a 100644 (file)
--- a/net/dsa/dsa2.c
+++ b/net/dsa/dsa2.c
@@ -484,8 +484,10 @@ static void dsa_dst_unapply(struct dsa_switch_tree *dst)
                dsa_ds_unapply(dst, ds);
        }
 
-       if (dst->cpu_switch)
+       if (dst->cpu_switch) {
                dsa_cpu_port_ethtool_restore(dst->cpu_switch);
+               dst->cpu_switch = NULL;
+       }
 
        pr_info("DSA: tree %d unapplied\n", dst->tree);
        dst->applied = false;