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Re: [PATCH 4/4] cfg80211: fix race between core hint and driver's custom apply

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On Wed, May 13, 2009 at 3:35 PM, Johannes Berg
<johannes@xxxxxxxxxxxxxxxx> wrote:
> On Wed, 2009-05-13 at 15:29 -0700, Luis R. Rodriguez wrote:
>
>> >>       queue_regulatory_request(request);
>> >>
>> >> +     /*
>> >> +      * This ensures last_request is populated once modules
>> >> +      * come swinging in and calling regulatory hints and
>> >> +      * wiphy_apply_custom_regulatory().
>> >> +      */
>> >> +     flush_scheduled_work();
>> >> +
>> >
>> > Umm, this is a little stupid, first you queue it and then you flush the
>> > workqueue... Why not call the function that runs off the workqueue
>> > directly?
>>
>> That was the original approach -- but then we went on a bagwagon on
>> getting all these regulatory hints through the workqueue. I can
>> address for for wireless-testing but not sure what path we prefer for
>> stable. The above one liner seems small enough and would be nice to
>> get confirmation from a user on stable.
>
> Yeah definitely the way to go for stable, and we can als put it into
> wireless-testing. But I think ultimately we should just refactor what is
> necessary and just call the function that would otherwise run off the
> workqueue. Can do that after this patch though.

OK -- will work on that next.

 Luis
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