From: Andrew Lunn andrew@lunn.ch
[ Upstream commit 38b4fe320119859c11b1dc06f6b4987a16344fa1 ]
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: 92571a1aae40 ("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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/usb/lan78xx.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-)
--- a/drivers/net/usb/lan78xx.c +++ b/drivers/net/usb/lan78xx.c @@ -3799,10 +3799,14 @@ static int lan78xx_probe(struct usb_inte /* 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); @@ -3815,14 +3819,10 @@ static int lan78xx_probe(struct usb_inte 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: