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| author |   WANG Cong <amwang@redhat.com> | 2011-06-09 00:28:13 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2011-06-09 00:28:13 -0700 |
| commit | 0c1ad04aecb975f2a2014e1bc5a2fa23923ecbd9 (patch) | |
| tree | fe1576d55357e8f1530cc9a3df123fbf631274dc /net | |
| parent | net: pmtu_expires fixes (diff) | |
| download | linux-dev-0c1ad04aecb975f2a2014e1bc5a2fa23923ecbd9.tar.xz linux-dev-0c1ad04aecb975f2a2014e1bc5a2fa23923ecbd9.zip | |
netpoll: prevent netpoll setup on slave devices
In commit 8d8fc29d02a33e4bd5f4fa47823c1fd386346093
(netpoll: disable netpoll when enslave a device), we automatically
disable netpoll when the underlying device is being enslaved,
we also need to prevent people from setuping netpoll on
devices that are already enslaved.
Signed-off-by: WANG Cong <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/netpoll.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/net/core/netpoll.c b/net/core/netpoll.c index 2d7d6d473781..42ea4b0e59f1 100644 --- a/net/core/netpoll.c +++ b/net/core/netpoll.c @@ -792,6 +792,12 @@ int netpoll_setup(struct netpoll *np) return -ENODEV; } + if (ndev->master) { + printk(KERN_ERR "%s: %s is a slave device, aborting.\n", + np->name, np->dev_name); + return -EBUSY; + } + if (!netif_running(ndev)) { unsigned long atmost, atleast; |