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net: usb: lan78xx: Connect PHY before registering MAC 

As soon as the netdev is registers, the kernel can start using the
interface. If the driver connects the MAC to the PHY after the netdev
is registered, there is a race condition where the interface can be
opened without having the PHY connected.

Change the order to close this race condition.

Fixes: 92571a1aae ("lan78xx: Connect phy early")
Reported-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrew Lunn 2019-10-17 21:29:26 +02:00 committed by David S. Miller
parent e381d2b4e2
commit 38b4fe3201
1 changed files with 6 additions and 6 deletions
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12
drivers/net/usb/lan78xx.c
View File

@ -3782,10 +3782,14 @@ static int lan78xx_probe(struct usb_interface *intf,
/* driver requires remote-wakeup capability during autosuspend. */
intf->needs_remote_wakeup = 1;
ret = lan78xx_phy_init(dev);
if (ret < 0)
goto out4;
ret = register_netdev(netdev);
if (ret != 0) {
netif_err(dev, probe, netdev, "couldn't register the device\n");
goto out4;
goto out5;
}
usb_set_intfdata(intf, dev);
@ -3798,14 +3802,10 @@ static int lan78xx_probe(struct usb_interface *intf,
pm_runtime_set_autosuspend_delay(&udev->dev,
DEFAULT_AUTOSUSPEND_DELAY);
ret = lan78xx_phy_init(dev);
if (ret < 0)
goto out5;
return 0;
out5:
unregister_netdev(netdev);
phy_disconnect(netdev->phydev);
out4:
usb_free_urb(dev->urb_intr);
out3: