target/linux/generic/backport-4.19/711-v5.3-net-sfp-add-mandatory-attach-detach-methods-for-sfp-.patch

   1 From aeabfaa63285470e81fa341e14f92d68880aa160 Mon Sep 17 00:00:00 2001
   2 From: Russell King <rmk+kernel@armlinux.org.uk>
   3 Date: Tue, 28 May 2019 10:57:34 +0100
   4 Subject: [PATCH 609/660] net: sfp: add mandatory attach/detach methods for sfp
   5  buses
   6
   7 Add attach and detach methods for SFP buses, which will allow us to get
   8 rid of the netdev storage in sfp-bus.
   9
  10 Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
  11 Reviewed-by: Andrew Lunn <andrew@lunn.ch>
  12 Signed-off-by: David S. Miller <davem@davemloft.net>
  13 Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
  14 ---
  15  drivers/net/phy/phylink.c | 16 ++++++++++++++++
  16  drivers/net/phy/sfp-bus.c |  4 ++--
  17  include/linux/sfp.h       |  6 ++++++
  18  3 files changed, 24 insertions(+), 2 deletions(-)
  19
  20 --- a/drivers/net/phy/phylink.c
  21 +++ b/drivers/net/phy/phylink.c
  22 @@ -1615,6 +1615,20 @@ int phylink_mii_ioctl(struct phylink *pl
  23  }
  24  EXPORT_SYMBOL_GPL(phylink_mii_ioctl);
  25
  26 +static void phylink_sfp_attach(void *upstream, struct sfp_bus *bus)
  27 +{
  28 +       struct phylink *pl = upstream;
  29 +
  30 +       pl->netdev->sfp_bus = bus;
  31 +}
  32 +
  33 +static void phylink_sfp_detach(void *upstream, struct sfp_bus *bus)
  34 +{
  35 +       struct phylink *pl = upstream;
  36 +
  37 +       pl->netdev->sfp_bus = NULL;
  38 +}
  39 +
  40  static int phylink_sfp_module_insert(void *upstream,
  41                                      const struct sfp_eeprom_id *id)
  42  {
  43 @@ -1733,6 +1747,8 @@ static void phylink_sfp_disconnect_phy(v
  44  }
  45
  46  static const struct sfp_upstream_ops sfp_phylink_ops = {
  47 +       .attach = phylink_sfp_attach,
  48 +       .detach = phylink_sfp_detach,
  49         .module_insert = phylink_sfp_module_insert,
  50         .link_up = phylink_sfp_link_up,
  51         .link_down = phylink_sfp_link_down,
  52 --- a/drivers/net/phy/sfp-bus.c
  53 +++ b/drivers/net/phy/sfp-bus.c
  54 @@ -425,7 +425,7 @@ static int sfp_register_bus(struct sfp_b
  55         bus->socket_ops->attach(bus->sfp);
  56         if (bus->started)
  57                 bus->socket_ops->start(bus->sfp);
  58 -       bus->netdev->sfp_bus = bus;
  59 +       bus->upstream_ops->attach(bus->upstream, bus);
  60         bus->registered = true;
  61         return 0;
  62  }
  63 @@ -434,8 +434,8 @@ static void sfp_unregister_bus(struct sf
  64  {
  65         const struct sfp_upstream_ops *ops = bus->upstream_ops;
  66
  67 -       bus->netdev->sfp_bus = NULL;
  68         if (bus->registered) {
  69 +               bus->upstream_ops->detach(bus->upstream, bus);
  70                 if (bus->started)
  71                         bus->socket_ops->stop(bus->sfp);
  72                 bus->socket_ops->detach(bus->sfp);
  73 --- a/include/linux/sfp.h
  74 +++ b/include/linux/sfp.h
  75 @@ -469,6 +469,10 @@ struct sfp_bus;
  76
  77  /**
  78   * struct sfp_upstream_ops - upstream operations structure
  79 + * @attach: called when the sfp socket driver is bound to the upstream
  80 + *   (mandatory).
  81 + * @detach: called when the sfp socket driver is unbound from the upstream
  82 + *   (mandatory).
  83   * @module_insert: called after a module has been detected to determine
  84   *   whether the module is supported for the upstream device.
  85   * @module_remove: called after the module has been removed.
  86 @@ -481,6 +485,8 @@ struct sfp_bus;
  87   *   been removed.
  88   */
  89  struct sfp_upstream_ops {
  90 +       void (*attach)(void *priv, struct sfp_bus *bus);
  91 +       void (*detach)(void *priv, struct sfp_bus *bus);
  92         int (*module_insert)(void *priv, const struct sfp_eeprom_id *id);
  93         void (*module_remove)(void *priv);
  94         void (*link_down)(void *priv);