target/linux/layerscape/patches-5.4/701-net-0347-staging-fsl-dpaa2-mac-do-not-call-dpmac_set_link_sta.patch

   1 From 978b13baa79b68f3471cc2c5110a2e45aab9ca61 Mon Sep 17 00:00:00 2001
   2 From: Ioana Ciornei <ioana.ciornei@nxp.com>
   3 Date: Tue, 10 Dec 2019 17:26:06 +0200
   4 Subject: [PATCH] staging: fsl-dpaa2/mac: do not call dpmac_set_link_state()
   5  when nothing changed
   6
   7 In case nothing changed in the link configuration do not call
   8 dpmac_set_link_state().
   9 This is needed in case of the following sequence of commands.
  10
  11 $ ip link set dev eth1 up; ip link set dev eth2 down
  12
  13 Phylib brings the link down when the aneg is started on the phy which
  14 translates in a link down from phy in MC and confuses the MC linkman.
  15
  16 Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
  17 ---
  18  drivers/staging/fsl-dpaa2/mac/mac.c | 16 ++++++++++------
  19  1 file changed, 10 insertions(+), 6 deletions(-)
  20
  21 --- a/drivers/staging/fsl-dpaa2/mac/mac.c
  22 +++ b/drivers/staging/fsl-dpaa2/mac/mac.c
  23 @@ -158,12 +158,16 @@ static void dpaa2_mac_link_changed(struc
  24                 netif_carrier_off(netdev);
  25         }
  26
  27 -       if (priv->old_state.up != state.up ||
  28 -           priv->old_state.rate != state.rate ||
  29 -           priv->old_state.options != state.options) {
  30 -               priv->old_state = state;
  31 -               phy_print_status(phydev);
  32 -       }
  33 +       /* Call the dpmac_set_link_state() only if there is a change in the
  34 +        * link configuration
  35 +        */
  36 +       if (priv->old_state.up == state.up &&
  37 +           priv->old_state.rate == state.rate &&
  38 +           priv->old_state.options == state.options)
  39 +               return;
  40 +
  41 +       priv->old_state = state;
  42 +       phy_print_status(phydev);
  43
  44         if (cmp_dpmac_ver(priv, DPMAC_LINK_AUTONEG_VER_MAJOR,
  45                           DPMAC_LINK_AUTONEG_VER_MINOR) < 0) {