diff options
| author | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2022-02-21 17:10:52 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-02-22 16:57:08 -0800 |
| commit | 1054457006d4a14de4ae4132030e33d7eedaeba1 (patch) | |
| tree | ef41912466cfc3358138bf4616c1713dc9656061 /drivers/net/phy/phylink.c | |
| parent | 12c740c8683fed9eee4ae9ddddc96a8abeeeda9e (diff) | |
net: phy: phylink: fix DSA mac_select_pcs() introduction
Vladimir Oltean reports that probing on DSA drivers that aren't yet
populating supported_interfaces now fails. Fix this by allowing
phylink to detect whether DSA actually provides an underlying
mac_select_pcs() implementation.
Reported-by: Vladimir Oltean <olteanv@gmail.com>
Fixes: bde018222c6b ("net: dsa: add support for phylink mac_select_pcs()")
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Tested-by: Vladimir Oltean <olteanv@gmail.com>
Link: https://lore.kernel.org/r/E1nMCD6-00A0wC-FG@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/phy/phylink.c')
| -rw-r--r-- | drivers/net/phy/phylink.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c index 26f1219a005f..28aa23533107 100644 --- a/drivers/net/phy/phylink.c +++ b/drivers/net/phy/phylink.c @@ -74,6 +74,7 @@ struct phylink { struct work_struct resolve; bool mac_link_dropped; + bool using_mac_select_pcs; struct sfp_bus *sfp_bus; bool sfp_may_have_phy; @@ -416,7 +417,7 @@ static int phylink_validate_mac_and_pcs(struct phylink *pl, int ret; /* Get the PCS for this interface mode */ - if (pl->mac_ops->mac_select_pcs) { + if (pl->using_mac_select_pcs) { pcs = pl->mac_ops->mac_select_pcs(pl->config, state->interface); if (IS_ERR(pcs)) return PTR_ERR(pcs); @@ -791,7 +792,7 @@ static void phylink_major_config(struct phylink *pl, bool restart, phylink_dbg(pl, "major config %s\n", phy_modes(state->interface)); - if (pl->mac_ops->mac_select_pcs) { + if (pl->using_mac_select_pcs) { pcs = pl->mac_ops->mac_select_pcs(pl->config, state->interface); if (IS_ERR(pcs)) { phylink_err(pl, @@ -1205,11 +1206,17 @@ struct phylink *phylink_create(struct phylink_config *config, phy_interface_t iface, const struct phylink_mac_ops *mac_ops) { + bool using_mac_select_pcs = false; struct phylink *pl; int ret; - /* Validate the supplied configuration */ if (mac_ops->mac_select_pcs && + mac_ops->mac_select_pcs(config, PHY_INTERFACE_MODE_NA) != + ERR_PTR(-EOPNOTSUPP)) + using_mac_select_pcs = true; + + /* Validate the supplied configuration */ + if (using_mac_select_pcs && phy_interface_empty(config->supported_interfaces)) { dev_err(config->dev, "phylink: error: empty supported_interfaces but mac_select_pcs() method present\n"); @@ -1233,6 +1240,7 @@ struct phylink *phylink_create(struct phylink_config *config, return ERR_PTR(-EINVAL); } + pl->using_mac_select_pcs = using_mac_select_pcs; pl->phy_state.interface = iface; pl->link_interface = iface; if (iface == PHY_INTERFACE_MODE_MOCA) |