diff options
| author | Michael Walle <michael@walle.cc> | 2022-05-26 01:12:39 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-06-14 18:44:54 +0200 |
| commit | 00c041773a33d72e4f875c764c1691aead53cff5 (patch) | |
| tree | e02db2345b5d26e2907ac9cd185b4a067033ce20 | |
| parent | 607c5cd1a08e196d9f2bd3b25a8083ed27ad7ceb (diff) | |
net: lan966x: check devm_of_phy_get() for -EDEFER_PROBE
[ Upstream commit b58cdd4388b1d8f5bee9f5a3897a7e780d1eaa48 ]
At the moment, if devm_of_phy_get() returns an error the serdes
simply isn't set. While it is bad to ignore an error in general, there
is a particular bug that network isn't working if the serdes driver is
compiled as a module. In that case, devm_of_phy_get() returns
-EDEFER_PROBE and the error is silently ignored.
The serdes is optional, it is not there if the port is using RGMII, in
which case devm_of_phy_get() returns -ENODEV. Rearrange the error
handling so that -ENODEV will be handled but other error codes will
abort the probing.
Fixes: d28d6d2e37d1 ("net: lan966x: add port module support")
Signed-off-by: Michael Walle <michael@walle.cc>
Link: https://lore.kernel.org/r/20220525231239.1307298-1-michael@walle.cc
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/net/ethernet/microchip/lan966x/lan966x_main.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.c b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c index 05f6dcc9dfd52..f180a157eea49 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.c +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c @@ -1080,8 +1080,13 @@ static int lan966x_probe(struct platform_device *pdev) lan966x->ports[p]->fwnode = fwnode_handle_get(portnp); serdes = devm_of_phy_get(lan966x->dev, to_of_node(portnp), NULL); - if (!IS_ERR(serdes)) - lan966x->ports[p]->serdes = serdes; + if (PTR_ERR(serdes) == -ENODEV) + serdes = NULL; + if (IS_ERR(serdes)) { + err = PTR_ERR(serdes); + goto cleanup_ports; + } + lan966x->ports[p]->serdes = serdes; lan966x_port_init(lan966x->ports[p]); } |