The interrupt this driver maps for its PHY is written only into phydev->irq, while the bus table mdiobus->irq[] keeps reading PHY_POLL for the same address. That table is where phylib records what the bus described - phy_device_create() seeds phydev->irq from it - so the number lives only as long as nothing else writes that one field. Copy the number into the table entry of the PHY this driver found, and into no other. With an external PHY phy_mask is 0, so other PHYs on the bus keep polling. The address is known only after the scan, so the write to phydev->irq stays. Found going through the drivers that keep a PHY interrupt outside the bus table, so that the restore on detach later in this series has a number to hand back here as well. Signed-off-by: Aleksei Sviridkin <f@lex.la> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Link: https://patch.msgid.link/20261001130236.106059-3-f@lex.la Signed-off-by: Jakub Kicinski <kuba@kernel.org>