[PATCH 5.11 132/210] net: dsa: Fix type was not set for devlink port

Greg Kroah-Hartman
2021-04-12T09:43:33Z

From: Maxim Kochetkov <fido_max@inbox.ru>

[ Upstream commit fb6ec87f7229b92baa81b35cbc76f2626d5bfadb ]

If PHY is not available on DSA port (described at devicetree but absent or
failed to detect) then kernel prints warning after 3700 secs:

[ 3707.948771] ------------[ cut here ]------------
[ 3707.948784] Type was not set for devlink port.
[ 3707.948894] WARNING: CPU: 1 PID: 17 at net/core/devlink.c:8097 0xc083f9d8

We should unregister the devlink port as a user port and
re-register it as an unused port before executing "continue" in case of
dsa_port_setup error.

Fixes: 86f8b1c01a0a ("net: dsa: Do not make user port errors fatal")
Signed-off-by: Maxim Kochetkov <fido_max@inbox.ru>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/dsa/dsa2.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
index a04fd637b4cd..3ada338d7e08 100644
--- a/net/dsa/dsa2.c
+++ b/net/dsa/dsa2.c
@@ -533,8 +533,14 @@ static int dsa_tree_setup_switches(struct dsa_switch_tree *dst)

list_for_each_entry(dp, &dst->ports, list) {
err = dsa_port_setup(dp);
- if (err)
+ if (err) {
+ dsa_port_devlink_teardown(dp);
+ dp->type = DSA_PORT_TYPE_UNUSED;
+ err = dsa_port_devlink_setup(dp);
+ if (err)
+ goto teardown;
continue;
+ }
}

return 0;
--
2.30.2