linux-kernel - [PATCH v2] net: usb: lan78xx: lan78xx_phy_init(): use PHY_POLL instead of "0" if no IRQ is available

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Message-Id: <20211127104707.2546-1-schuchmann@schleissheimer.de>
Date:   Sat, 27 Nov 2021 11:47:07 +0100
From:   Sven Schuchmann <schuchmann@...leissheimer.de>
To:     john.efstathiades@...blebay.com, kuba@...nel.org, andrew@...n.ch
Cc:     Sven Schuchmann <schuchmann@...leissheimer.de>,
        Woojung Huh <woojung.huh@...rochip.com>,
        UNGLinuxDriver@...rochip.com,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2] net: usb: lan78xx: lan78xx_phy_init(): use PHY_POLL instead of "0" if no IRQ is available

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@...n.ch>
Signed-off-by: Sven Schuchmann <schuchmann@...leissheimer.de>
---
Changes v1->v2: Added "Fixes" and "Reviewed-by"
---
 drivers/net/usb/lan78xx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
index 2bfb59ae0eaf..185e08c1af31 100644
--- a/drivers/net/usb/lan78xx.c
+++ b/drivers/net/usb/lan78xx.c
@@ -2398,7 +2398,7 @@ static int lan78xx_phy_init(struct lan78xx_net *dev)
 	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 */
-- 
2.17.1