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Date:      Wed, 7 Jan 2009 13:59:58 -0800
From:      "Jack Vogel" <jfvogel@gmail.com>
To:        "Sam Leffler" <sam@freebsd.org>
Cc:        Eitan Shefi <eitans@mellanox.co.il>, Angelo Turetta <aturetta@bestunion.it>, Yony Yossef <yonyossef.lists@gmail.com>, freebsd-net@freebsd.org
Subject:   Re: VLAN interface management - unloading carrying driver hangs the machine
Message-ID:  <2a41acea0901071359w3f41465ajb8206cdef5b7b680@mail.gmail.com>
In-Reply-To: <4964EC4F.8030507@freebsd.org>
References:  <000001c970a8$3fa45240$220f000a@mtl.com> <4964C2E9.1060301@bestunion.it> <000001c970d9$4403e590$220f000a@mtl.com> <4964EC4F.8030507@freebsd.org>

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On Wed, Jan 7, 2009 at 9:54 AM, Sam Leffler <sam@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



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