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net: amd-xgbe: use EOPNOTSUPP instead of ENOTSUPP in xgbe_phy_mii_read_c45

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The MDIO read callback xgbe_phy_mii_read_c45() can propagate its return
value up through phylink_mii_ioctl() to user space via netdev ioctls such
as SIOCGMIIREG. Returning ENOTSUPP results in user space seeing
"Unknown error", since ENOTSUPP is not a standard errno value.

Replace ENOTSUPP with EOPNOTSUPP to align with the MDIO core’s
usage and ensure user space receives a proper "Operation not supported"
error instead of an unknown code.

Signed-off-by: Alok Tiwari <alok.a.tiwari@oracle.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Acked-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Link: https://patch.msgid.link/20251015025751.1532149-1-alok.a.tiwari@oracle.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Alok Tiwari
2025-10-14 19:57:43 -07:00
committed by Jakub Kicinski
parent 55db64ddd6
commit bd853a59a8
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c
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@@ -668,7 +668,7 @@ static int xgbe_phy_mii_read_c45(struct mii_bus *mii, int addr, int devad,
else if (phy_data->conn_type & XGBE_CONN_TYPE_MDIO)
ret = xgbe_phy_mdio_mii_read_c45(pdata, addr, devad, reg);
else
ret = -ENOTSUPP;
ret = -EOPNOTSUPP;
xgbe_phy_put_comm_ownership(pdata);