target/linux/generic/backport-5.10/773-v5.12-net-dsa-move-switchdev-event-implementation-under-th.patch

   1 From 447d290a58bd335d68f665713842365d3d6447df Mon Sep 17 00:00:00 2001
   2 From: Vladimir Oltean <vladimir.oltean@nxp.com>
   3 Date: Wed, 6 Jan 2021 11:51:33 +0200
   4 Subject: [PATCH] net: dsa: move switchdev event implementation under the same
   5  switch/case statement
   6
   7 We'll need to start listening to SWITCHDEV_FDB_{ADD,DEL}_TO_DEVICE
   8 events even for interfaces where dsa_slave_dev_check returns false, so
   9 we need that check inside the switch-case statement for SWITCHDEV_FDB_*.
  10
  11 This movement also avoids a useless allocation / free of switchdev_work
  12 on the untreated "default event" case.
  13
  14 Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
  15 Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
  16 Signed-off-by: Jakub Kicinski <kuba@kernel.org>
  17 ---
  18  net/dsa/slave.c | 35 ++++++++++++++++-------------------
  19  1 file changed, 16 insertions(+), 19 deletions(-)
  20
  21 --- a/net/dsa/slave.c
  22 +++ b/net/dsa/slave.c
  23 @@ -2122,31 +2122,29 @@ static int dsa_slave_switchdev_event(str
  24         struct dsa_port *dp;
  25         int err;
  26
  27 -       if (event == SWITCHDEV_PORT_ATTR_SET) {
  28 +       switch (event) {
  29 +       case SWITCHDEV_PORT_ATTR_SET:
  30                 err = switchdev_handle_port_attr_set(dev, ptr,
  31                                                      dsa_slave_dev_check,
  32                                                      dsa_slave_port_attr_set);
  33                 return notifier_from_errno(err);
  34 -       }
  35 -
  36 -       if (!dsa_slave_dev_check(dev))
  37 -               return NOTIFY_DONE;
  38 +       case SWITCHDEV_FDB_ADD_TO_DEVICE:
  39 +       case SWITCHDEV_FDB_DEL_TO_DEVICE:
  40 +               if (!dsa_slave_dev_check(dev))
  41 +                       return NOTIFY_DONE;
  42
  43 -       dp = dsa_slave_to_port(dev);
  44 +               dp = dsa_slave_to_port(dev);
  45
  46 -       switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
  47 -       if (!switchdev_work)
  48 -               return NOTIFY_BAD;
  49 -
  50 -       INIT_WORK(&switchdev_work->work,
  51 -                 dsa_slave_switchdev_event_work);
  52 -       switchdev_work->ds = dp->ds;
  53 -       switchdev_work->port = dp->index;
  54 -       switchdev_work->event = event;
  55 +               switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
  56 +               if (!switchdev_work)
  57 +                       return NOTIFY_BAD;
  58 +
  59 +               INIT_WORK(&switchdev_work->work,
  60 +                         dsa_slave_switchdev_event_work);
  61 +               switchdev_work->ds = dp->ds;
  62 +               switchdev_work->port = dp->index;
  63 +               switchdev_work->event = event;
  64
  65 -       switch (event) {
  66 -       case SWITCHDEV_FDB_ADD_TO_DEVICE:
  67 -       case SWITCHDEV_FDB_DEL_TO_DEVICE:
  68                 fdb_info = ptr;
  69
  70                 if (!fdb_info->added_by_user) {
  71 @@ -2159,13 +2157,12 @@ static int dsa_slave_switchdev_event(str
  72                 switchdev_work->vid = fdb_info->vid;
  73
  74                 dev_hold(dev);
  75 +               dsa_schedule_work(&switchdev_work->work);
  76                 break;
  77         default:
  78 -               kfree(switchdev_work);
  79                 return NOTIFY_DONE;
  80         }
  81
  82 -       dsa_schedule_work(&switchdev_work->work);
  83         return NOTIFY_OK;
  84  }
  85