[PATCH 1/1] lan78xx: Don't reset the interface on open

[Paolo Pisati]

From: Phil Elwell <phil at raspberrypi.org>

BugLink: https://bugs.launchpad.net/bugs/1797406

Commit 92571a1aae40 ("lan78xx: Connect phy early") moves the PHY
initialisation into lan78xx_probe, but lan78xx_open subsequently calls
lan78xx_reset. As well as forcing a second round of link negotiation,
this reset frequently prevents the phy interrupt from being generated
(even though the link is up), rendering the interface unusable.

Fix this issue by removing the lan78xx_reset call from lan78xx_open.

Fixes: 92571a1aae40 ("lan78xx: Connect phy early")
Signed-off-by: Phil Elwell <phil at raspberrypi.org>
Signed-off-by: David S. Miller <davem at davemloft.net>
(cherry picked from commit 47b998653fea4ef69e3e89574956386f262bccca)
Signed-off-by: Paolo Pisati <paolo.pisati at canonical.com>
---
 drivers/net/usb/lan78xx.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
index 88f2c7cde71d..77a186befd07 100644
--- a/drivers/net/usb/lan78xx.c
+++ b/drivers/net/usb/lan78xx.c
@@ -2562,10 +2562,6 @@ static int lan78xx_open(struct net_device *net)
 	if (ret < 0)
 		goto out;
 
-	ret = lan78xx_reset(dev);
-	if (ret < 0)
-		goto done;
-
 	phy_start(net->phydev);
 
 	netif_dbg(dev, ifup, dev->net, "phy initialised successfully");
-- 
2.17.1