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net: pcs: xpcs: fix C73 AN not getting enabled 

The XPCS expects clause 73 (copper backplane) autoneg to follow the
ethtool autoneg bit. It actually did that until the blamed
commit inaptly replaced state->an_enabled (coming from ethtool) with
phylink_autoneg_inband() (coming from the device tree or struct
phylink_config), as part of an unrelated phylink_pcs API conversion.

Russell King suggests that state->an_enabled from the original code was
just a proxy for the ethtool Autoneg bit, and that the correct way of
restoring the functionality is to check for this bit in the advertising
mask.

Fixes: 11059740e6 ("net: pcs: xpcs: convert to phylink_pcs_ops")
Link: https://lore.kernel.org/netdev/ZGNt2MFeRolKGFck@shell.armlinux.org.uk/
Suggested-by: Russell King (Oracle) <linux@armlinux.org.uk>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vladimir Oltean 2023-05-16 18:44:10 +03:00 committed by David S. Miller
parent 60829145f1
commit c46e78ba9a
1 changed files with 1 additions and 1 deletions
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2
drivers/net/pcs/pcs-xpcs.c
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@ -873,7 +873,7 @@ int xpcs_do_config(struct dw_xpcs *xpcs, phy_interface_t interface,
switch (compat->an_mode) {
case DW_AN_C73:
if (phylink_autoneg_inband(mode)) {
if (test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, advertising)) {
ret = xpcs_config_aneg_c73(xpcs, compat);
if (ret)
return ret;