[PATCH 4.14 094/106] net: usb: lan78xx: lan78xx_phy_init(): use PHY_POLL instead of "0" if no IRQ is available

Greg Kroah-Hartman
2021-12-06T15:14:31Z

From: Sven Schuchmann <schuchmann@schleissheimer.de>

commit 817b653160db9852d5a0498a31f047e18ce27e5b upstream.

On most systems request for IRQ 0 will fail, phylib will print an error message
and fall back to polling. To fix this set the phydev->irq to PHY_POLL if no IRQ
is available.

Fixes: cc89c323a30e ("lan78xx: Use irq_domain for phy interrupt from USB Int. EP")
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Sven Schuchmann <schuchmann@schleissheimer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/usb/lan78xx.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/usb/lan78xx.c
+++ b/drivers/net/usb/lan78xx.c
@@ -2052,7 +2052,7 @@ static int lan78xx_phy_init(struct lan78
if (dev->domain_data.phyirq > 0)
phydev->irq = dev->domain_data.phyirq;
else
- phydev->irq = 0;
+ phydev->irq = PHY_POLL;
netdev_dbg(dev->net, "phydev->irq = %d\n", phydev->irq);

/* set to AUTOMDIX */