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Re: [PATCH 4/4] cfg80211: add cellular base station regulatory hint support

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On Thu, Jul 5, 2012 at 12:45 AM, Johannes Berg
<johannes@xxxxxxxxxxxxxxxx> wrote:
> On Wed, 2012-07-04 at 09:26 -0700, Luis R. Rodriguez wrote:
>> I've skipped the other comments as I can address those in a new series.
>>
>> On Wed, Jul 4, 2012 at 2:42 AM, Johannes Berg <johannes@xxxxxxxxxxxxxxxx> wrote:
>> > So I'm not really convinced about this. It seems this Kconfig should
>> > better be a Kconfig that enables other Kconfig only, not enabling other
>> > features. How else would anyone be able to do due diligence and check
>> > what exactly this enables that they need to test?
>>
>> Makes sense, so would we then have CONFIG_REG_HINT_CELL_BASE_STATION ?
>
> I don't know how fine-grained it should be? Maybe it should be more
> generic and be a config for all (future) kinds of user hints?

Well so in this case the cell base station hint support gets used and
trusted on the wireless core if CONFIG_REG_HINT_CELL_BASE_STATION is
set. Whether or not a *driver* trusts and uses it as well will depend
on whether or not they set the NL80211_FEATURE_CELL_BASE_REG_HINTS
feature on their wiphy->features. The way I was thinking about drivers
going about enabling / disabling was to let the driver have its own
kconfig option for this. The reason is that firmware may require some
implementation / changes / testing to ensure that a device won't poop
out if this is used.

  Luis
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