net: macsec: Fix offload support for NETDEV_UNREGISTER event

commit 9cef24c8b76c1f6effe499d2f131807c90f7ce9a upstream.

Current macsec netdev notify handler handles NETDEV_UNREGISTER event by
releasing relevant SW resources only, this causes resources leak in case
of macsec HW offload, as the underlay driver was not notified to clean
it's macsec offload resources.

Fix by calling the underlay driver to clean it's relevant resources
by moving offload handling from macsec_dellink() to macsec_common_dellink()
when handling NETDEV_UNREGISTER event.

Fixes: 3cf3227a21d1 ("net: macsec: hardware offloading infrastructure")
Signed-off-by: Lior Nahmanson <liorna@nvidia.com>
Reviewed-by: Raed Salem <raeds@nvidia.com>
Signed-off-by: Raed Salem <raeds@nvidia.com>
Reviewed-by: Antoine Tenart <atenart@kernel.org>
Link: https://lore.kernel.org/r/1643542141-28956-1-git-send-email-raeds@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/macsec.c b/drivers/net/macsec.c
index 93dc48b9b4f24d6245d1a9cdf1d3d8ebe24f71e4..7c1a4b0a7272dfa789faa2622d73666049b49368 100644 (file)
--- a/drivers/net/macsec.c
+++ b/drivers/net/macsec.c
@@ -3870,6 +3870,18 @@ static void macsec_common_dellink(struct net_device *dev, struct list_head *head
        struct macsec_dev *macsec = macsec_priv(dev);
        struct net_device *real_dev = macsec->real_dev;
 
+       /* If h/w offloading is available, propagate to the device */
+       if (macsec_is_offloaded(macsec)) {
+               const struct macsec_ops *ops;
+               struct macsec_context ctx;
+
+               ops = macsec_get_ops(netdev_priv(dev), &ctx);
+               if (ops) {
+                       ctx.secy = &macsec->secy;
+                       macsec_offload(ops->mdo_del_secy, &ctx);
+               }
+       }
+
        unregister_netdevice_queue(dev, head);
        list_del_rcu(&macsec->secys);
        macsec_del_dev(macsec);
@@ -3884,18 +3896,6 @@ static void macsec_dellink(struct net_device *dev, struct list_head *head)
        struct net_device *real_dev = macsec->real_dev;
        struct macsec_rxh_data *rxd = macsec_data_rtnl(real_dev);
 
-       /* If h/w offloading is available, propagate to the device */
-       if (macsec_is_offloaded(macsec)) {
-               const struct macsec_ops *ops;
-               struct macsec_context ctx;
-
-               ops = macsec_get_ops(netdev_priv(dev), &ctx);
-               if (ops) {
-                       ctx.secy = &macsec->secy;
-                       macsec_offload(ops->mdo_del_secy, &ctx);
-               }
-       }
-
        macsec_common_dellink(dev, head);
 
        if (list_empty(&rxd->secys)) {