target/linux/armsr/patches-6.1/701-v6.2-0006-net-dpaa2-switch-assign-port_priv-mac-after-dpaa2_ma.patch

   1 From a5e7f7e277bd4403c45c1c7922d56d0eb08dbc7c Mon Sep 17 00:00:00 2001
   2 From: Vladimir Oltean <vladimir.oltean@nxp.com>
   3 Date: Tue, 29 Nov 2022 16:12:15 +0200
   4 Subject: [PATCH 08/14] net: dpaa2-switch: assign port_priv->mac after
   5  dpaa2_mac_connect() call
   6
   7 The dpaa2-switch has the exact same locking requirements when connected
   8 to a DPMAC, so it needs port_priv->mac to always point either to NULL,
   9 or to a DPMAC with a fully initialized phylink instance.
  10
  11 Make the same preparatory change in the dpaa2-switch driver as in the
  12 dpaa2-eth one.
  13
  14 Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
  15 Reviewed-by: Ioana Ciornei <ioana.ciornei@nxp.com>
  16 Tested-by: Ioana Ciornei <ioana.ciornei@nxp.com>
  17 Signed-off-by: Paolo Abeni <pabeni@redhat.com>
  18 ---
  19  .../ethernet/freescale/dpaa2/dpaa2-switch.c   | 21 +++++++++++--------
  20  1 file changed, 12 insertions(+), 9 deletions(-)
  21
  22 --- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c
  23 +++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c
  24 @@ -1450,9 +1450,8 @@ static int dpaa2_switch_port_connect_mac
  25         err = dpaa2_mac_open(mac);
  26         if (err)
  27                 goto err_free_mac;
  28 -       port_priv->mac = mac;
  29
  30 -       if (dpaa2_switch_port_is_type_phy(port_priv)) {
  31 +       if (dpaa2_mac_is_type_phy(mac)) {
  32                 err = dpaa2_mac_connect(mac);
  33                 if (err) {
  34                         netdev_err(port_priv->netdev,
  35 @@ -1462,11 +1461,12 @@ static int dpaa2_switch_port_connect_mac
  36                 }
  37         }
  38
  39 +       port_priv->mac = mac;
  40 +
  41         return 0;
  42
  43  err_close_mac:
  44         dpaa2_mac_close(mac);
  45 -       port_priv->mac = NULL;
  46  err_free_mac:
  47         kfree(mac);
  48         return err;
  49 @@ -1474,15 +1474,18 @@ err_free_mac:
  50
  51  static void dpaa2_switch_port_disconnect_mac(struct ethsw_port_priv *port_priv)
  52  {
  53 -       if (dpaa2_switch_port_is_type_phy(port_priv))
  54 -               dpaa2_mac_disconnect(port_priv->mac);
  55 +       struct dpaa2_mac *mac = port_priv->mac;
  56 +
  57 +       port_priv->mac = NULL;
  58
  59 -       if (!dpaa2_switch_port_has_mac(port_priv))
  60 +       if (!mac)
  61                 return;
  62
  63 -       dpaa2_mac_close(port_priv->mac);
  64 -       kfree(port_priv->mac);
  65 -       port_priv->mac = NULL;
  66 +       if (dpaa2_mac_is_type_phy(mac))
  67 +               dpaa2_mac_disconnect(mac);
  68 +
  69 +       dpaa2_mac_close(mac);
  70 +       kfree(mac);
  71  }
  72
  73  static irqreturn_t dpaa2_switch_irq0_handler_thread(int irq_num, void *arg)