target/linux/armsr/patches-6.1/701-v6.2-0004-net-dpaa2-mac-remove-defensive-check-in-dpaa2_mac_di.patch

   1 From 095ef388f714d622aa503fcccf20dc4095b72762 Mon Sep 17 00:00:00 2001
   2 From: Vladimir Oltean <vladimir.oltean@nxp.com>
   3 Date: Tue, 29 Nov 2022 16:12:13 +0200
   4 Subject: [PATCH 06/14] net: dpaa2-mac: remove defensive check in
   5  dpaa2_mac_disconnect()
   6
   7 dpaa2_mac_disconnect() will only be called with a NULL mac->phylink if
   8 dpaa2_mac_connect() failed, or was never called.
   9
  10 The callers are these:
  11
  12 dpaa2_eth_disconnect_mac():
  13
  14         if (dpaa2_eth_is_type_phy(priv))
  15                 dpaa2_mac_disconnect(priv->mac);
  16
  17 dpaa2_switch_port_disconnect_mac():
  18
  19         if (dpaa2_switch_port_is_type_phy(port_priv))
  20                 dpaa2_mac_disconnect(port_priv->mac);
  21
  22 priv->mac can be NULL, but in that case, dpaa2_eth_is_type_phy() returns
  23 false, and dpaa2_mac_disconnect() is never called. Similar for
  24 dpaa2-switch.
  25
  26 When priv->mac is non-NULL, it means that dpaa2_mac_connect() returned
  27 zero (success), and therefore, priv->mac->phylink is also a valid
  28 pointer.
  29
  30 Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
  31 Reviewed-by: Andrew Lunn <andrew@lunn.ch>
  32 Reviewed-by: Ioana Ciornei <ioana.ciornei@nxp.com>
  33 Tested-by: Ioana Ciornei <ioana.ciornei@nxp.com>
  34 Signed-off-by: Paolo Abeni <pabeni@redhat.com>
  35 ---
  36  drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c | 3 ---
  37  1 file changed, 3 deletions(-)
  38
  39 --- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c
  40 +++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c
  41 @@ -446,9 +446,6 @@ err_pcs_destroy:
  42
  43  void dpaa2_mac_disconnect(struct dpaa2_mac *mac)
  44  {
  45 -       if (!mac->phylink)
  46 -               return;
  47 -
  48         phylink_disconnect_phy(mac->phylink);
  49         phylink_destroy(mac->phylink);
  50         dpaa2_pcs_destroy(mac);