diff options
| author | Nisar Sayed <Nisar.Sayed@microchip.com> | 2017-08-01 10:24:17 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-08-02 10:39:58 -0700 |
| commit | fb52c3b597f0b44e893ded8c253845561f9f57da (patch) | |
| tree | c36011f60ae624e48fbe42646e8e9df2a4c56fc3 | |
| parent | 12c5d0c0485fd03127e24848af0f0aff399d2db9 (diff) | |
| download | linux-fb52c3b597f0b44e893ded8c253845561f9f57da.tar.bz2 | |
lan78xx: USB fast connect/disconnect crash fix
USB fast connect/disconnect crash fix
When USB plugged/unplugged at fast rate,
lan78xx_mdio_init() in lan78xx_bind() failing case is not handled.
Whenever lan78xx_mdio_init() failed, dev->mdiobus will be freed, however
since lan78xx_bind() not consider as error and try to proceed for
further initialization in lan78xx_probe() which leads system hung/crash.
Also when register_netdev() failed, netdev is freed without calling lan78xx_unbind().
Hence halting the failed cases right manner fixes the system crash/hung issue.
Signed-off-by: Nisar Sayed <Nisar.Sayed@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/usb/lan78xx.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c index 5833f7e2a127..8ef3639649a0 100644 --- a/drivers/net/usb/lan78xx.c +++ b/drivers/net/usb/lan78xx.c @@ -2858,13 +2858,13 @@ static int lan78xx_bind(struct lan78xx_net *dev, struct usb_interface *intf) /* Init all registers */ ret = lan78xx_reset(dev); - lan78xx_mdio_init(dev); + ret = lan78xx_mdio_init(dev); dev->net->flags |= IFF_MULTICAST; pdata->wol = WAKE_MAGIC; - return 0; + return ret; } static void lan78xx_unbind(struct lan78xx_net *dev, struct usb_interface *intf) @@ -3525,11 +3525,11 @@ static int lan78xx_probe(struct usb_interface *intf, udev = interface_to_usbdev(intf); udev = usb_get_dev(udev); - ret = -ENOMEM; netdev = alloc_etherdev(sizeof(struct lan78xx_net)); if (!netdev) { - dev_err(&intf->dev, "Error: OOM\n"); - goto out1; + dev_err(&intf->dev, "Error: OOM\n"); + ret = -ENOMEM; + goto out1; } /* netdev_printk() needs this */ @@ -3610,7 +3610,7 @@ static int lan78xx_probe(struct usb_interface *intf, ret = register_netdev(netdev); if (ret != 0) { netif_err(dev, probe, netdev, "couldn't register the device\n"); - goto out2; + goto out3; } usb_set_intfdata(intf, dev); |