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s390/qeth: unregister netdevice only when registered

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qeth only registers its netdevice when the qeth device is first set
online. Thus a device that has never been set online will trigger
a WARN ("network todo 'hsi%d' but state 0") in unregister_netdev() when
removed.

Fix this by protecting the unregister step, just like we already protect
against repeated registering of the netdevice.

Fixes: d3d1b205e8 ("s390/qeth: allocate netdevice early")
Reported-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Julian Wiedmann
2018-11-02 19:04:10 +01:00
committed by David S. Miller
parent bd74a7f9cc
commit 30356d0815
3 changed files with 11 additions and 4 deletions
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5
drivers/s390/net/qeth_l2_main.c
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@@ -826,7 +826,8 @@ static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
if (cgdev->state == CCWGROUP_ONLINE)
qeth_l2_set_offline(cgdev);
unregister_netdev(card->dev);
if (qeth_netdev_is_registered(card->dev))
unregister_netdev(card->dev);
}
static const struct ethtool_ops qeth_l2_ethtool_ops = {
@@ -866,7 +867,7 @@ static int qeth_l2_setup_netdev(struct qeth_card *card)
{
int rc;
if (card->dev->netdev_ops)
if (qeth_netdev_is_registered(card->dev))
return 0;
card->dev->priv_flags |= IFF_UNICAST_FLT;