[Bridge] netconsole breaks netpoll on bridge

[Cong Wang]

On Mon, Jun 16, 2014 at 5:51 AM, Stefan Priebe - Profihost AG
<s.priebe at profihost.ag> wrote:
> Hi,
>
> i'm using a vanilla 3.10.43 kernel and netconsole on top of a bridge.
>
> netconsole is used with vmbr0 (bridge) which is on top of bond0.
>
> If i want to add another bridge to vmbr0 is fails as long as netconsole
> is in use.
>
> # brctl addif vmbr0 fwpr2004p0
> can't add fwpr2004p0 to bridge vmbr0: Unknown error 524
>
> Kernel output:
> netpoll: (null): fwpr2004p0 doesn't support polling, aborting
>
> If i do rmmod netconsole - everything is working fine again.
>

This is expected, you can't add an interface which doesn't support
netpoll to a bridge which is running netpoll.

You should stop netpoll before adding it.