netdev - Re: [PATCH net] ematch: Fix auto-loading of ematch modules.

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Date:	Tue, 17 Feb 2015 10:00:16 -0800
From:	Cong Wang <cwang@...pensource.com>
To:	Ignacy Gawędzki 
	<ignacy.gawedzki@...en-communications.fr>,
	Cong Wang <cwang@...pensource.com>,
	netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH net] ematch: Fix auto-loading of ematch modules.

On Mon, Feb 16, 2015 at 10:50 AM, Ignacy Gawędzki
<ignacy.gawedzki@...en-communications.fr> wrote:
> On Mon, Feb 16, 2015 at 10:36:06AM -0800, thus spake Cong Wang:
>> On Mon, Feb 16, 2015 at 10:13 AM, Ignacy Gawędzki
>> <ignacy.gawedzki@...en-communications.fr> wrote:
>> > In tcf_em_validate(), when calling tcf_em_lookup(), don't put the resulting
>> > pointer directly into em->ops, if the function is to possibly return -EAGAIN
>> > after module auto-loading.  Otherwise, module_put() will be called by
>> > tcf_em_tree_destroy() on em->ops->owner, while it has already been called by
>> > tcf_em_validate() before return.
>> >
>>
>> Or simply reset em->ops to NULL after module_put()?
>
> Yeah, why not.  I just got my inspiration from what's done in cls_api.c and
> act_api.c.  What do you think, should the same simplification be applied to
> cls_api.c?
>

I prefer the smaller change, we don't have to align with cls_api.c.
Yeah, you can always clean it up for net-next.

Thanks.
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