[PATCH net v13 2/4] net: usb: smsc95xx: register the PHY interrupt with the MDIO bus

[Aleksei Sviridkin]

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.

Assisted-by: LLM
Signed-off-by: Aleksei Sviridkin <f@xxxxxx>
---

Notes:
    v13: write only the table entry of the PHY found by the scan, instead
    of every entry before registration. Andrew's Reviewed-by is dropped
    since the code changed.
    
    Compile-tested only; I have no LAN95xx device. No Fixes: tag, for the
    same reason as patch 1.

 drivers/net/usb/smsc95xx.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c
index 42e4048b574b..130a460c1f54 100644
--- a/drivers/net/usb/smsc95xx.c
+++ b/drivers/net/usb/smsc95xx.c
@@ -1252,6 +1252,7 @@ static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
 		goto unregister_mdio;
 	}
 
+	pdata->mdiobus->irq[pdata->phydev->mdio.addr] = phy_irq;
 	pdata->phydev->irq = phy_irq;
 	pdata->phydev->is_internal = pdata->is_internal_phy;
 
-- 
2.53.0