VLAN interface management - unloading carrying driver hangs the machine

[Jack Vogel]

On Wed, Jan 7, 2009 at 9:54 AM, Sam Leffler <sam at freebsd.org> wrote:

> Yony Yossef wrote:
>
>> Yony Yossef wrote:
>>>
>>>
>>>> /sbin/ifconfig vlan3653 create
>>>>
>>>> Problem is when I assign an IP to the vlan interface.
>>>> In that case, unloading the driver results in hanging the host.
>>>>  Does it sound familiar to anybody?
>>>>
>>>>
>>> Well, surely I'd expect problems by doing so.
>>> The correct way is to
>>>
>>>        /sbin/ifconfig vlan3653 destroy
>>>
>>> before unloading the driver.
>>>
>>> Angelo.
>>>
>>>
>>
>> Thanks, I didn't know freebsd does not allow it.
>>
>>
>>
> This seems wrong. Someone should disallow the driver detach/unload. Please
> file a PR about this so the issue is not lost.
>
> Sam
>

In many drivers, ahem, like mine, there is a test at detach and it will not
allow it if there
is a non-NULL trunk.

Sounds like a broken driver needs to be fixed is all...

Jack