netdev - Re: [PATCH v4 net-next 04/15] net: bridge: mst: Notify switchdev drivers of MST mode changes

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Date:   Mon, 14 Mar 2022 22:32:46 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Tobias Waldekranz <tobias@...dekranz.com>
Cc:     davem@...emloft.net, Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        Jiri Pirko <jiri@...nulli.us>,
        Ivan Vecera <ivecera@...hat.com>,
        Roopa Prabhu <roopa@...dia.com>,
        Nikolay Aleksandrov <razor@...ckwall.org>,
        Russell King <linux@...linux.org.uk>,
        Petr Machata <petrm@...dia.com>,
        Ido Schimmel <idosch@...dia.com>,
        Matt Johnston <matt@...econstruct.com.au>,
        Cooper Lees <me@...perlees.com>, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, bridge@...ts.linux-foundation.org
Subject: Re: [PATCH v4 net-next 04/15] net: bridge: mst: Notify switchdev
 drivers of MST mode changes

On Tue, 15 Mar 2022 01:25:32 +0100 Tobias Waldekranz wrote:
> Trigger a switchdev event whenever the bridge's MST mode is
> enabled/disabled. This allows constituent ports to either perform any
> required hardware config, or refuse the change if it not supported.
> 
> Signed-off-by: Tobias Waldekranz <tobias@...dekranz.com>

../net/bridge/br_mst.c: In function ‘br_mst_set_enabled’:
../net/bridge/br_mst.c:102:16: error: variable ‘attr’ has initializer but incomplete type
  102 |         struct switchdev_attr attr = {
      |                ^~~~~~~~~~~~~~
../net/bridge/br_mst.c:103:18: error: ‘struct switchdev_attr’ has no member named ‘id’
  103 |                 .id = SWITCHDEV_ATTR_ID_BRIDGE_MST,
      |                  ^~
../net/bridge/br_mst.c:103:23: error: ‘SWITCHDEV_ATTR_ID_BRIDGE_MST’ undeclared (first use in this function)
  103 |                 .id = SWITCHDEV_ATTR_ID_BRIDGE_MST,
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
../net/bridge/br_mst.c:103:23: note: each undeclared identifier is reported only once for each function it appears in
../net/bridge/br_mst.c:103:23: warning: excess elements in struct initializer
../net/bridge/br_mst.c:103:23: note: (near initialization for ‘attr’)
../net/bridge/br_mst.c:104:18: error: ‘struct switchdev_attr’ has no member named ‘orig_dev’
  104 |                 .orig_dev = br->dev,
      |                  ^~~~~~~~
../net/bridge/br_mst.c:104:29: warning: excess elements in struct initializer
  104 |                 .orig_dev = br->dev,
      |                             ^~
../net/bridge/br_mst.c:104:29: note: (near initialization for ‘attr’)
../net/bridge/br_mst.c:105:18: error: ‘struct switchdev_attr’ has no member named ‘u’
  105 |                 .u.mst = on,
      |                  ^
../net/bridge/br_mst.c:105:26: warning: excess elements in struct initializer
  105 |                 .u.mst = on,
      |                          ^~
../net/bridge/br_mst.c:105:26: note: (near initialization for ‘attr’)
../net/bridge/br_mst.c:102:31: error: storage size of ‘attr’ isn’t known
  102 |         struct switchdev_attr attr = {
      |                               ^~~~
../net/bridge/br_mst.c:125:15: error: implicit declaration of function ‘switchdev_port_attr_set’; did you mean ‘br_switchdev_port_vlan_del’? [-Werror=implicit-function-declaration]
  125 |         err = switchdev_port_attr_set(br->dev, &attr, extack);
      |               ^~~~~~~~~~~~~~~~~~~~~~~
      |               br_switchdev_port_vlan_del
../net/bridge/br_mst.c:102:31: warning: unused variable ‘attr’ [-Wunused-variable]
  102 |         struct switchdev_attr attr = {
      |                               ^~~~