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SubjectRe: Problems with regulatory domain support and BCM43224
On 04/10/2012 06:28 PM, Seth Forshee wrote:
>> The patch builds, and kind of works. Scanning seems to be fine; I can
>> > see all the APs I expect in my area, including the one on a DFS channel
>> > that I couldn't see previously. I can associate with my 2.4 GHz APs, but
>> > not the 5 GHz AP. I see timme outs waiting for probe responses, and I'm
>> > hitting the WARN_ON_ONCE in brcms_c_wait_for_tx_completion(). I haven't
>> > really debugged this yet -- I thought I'd send out the patch to collect
>> > comments while I debug. Suggestions of what's causing this are also
>> > welcome:)
> This was due to always passing true for the value of mute_tx to
> brcms_b_set_chanspec() on passive channels. For now I'm just always
> passing false, which looks like it ought to be okay as we shouldn't have
> any tx on passive channels unless beacons are seen on the channel.

Yes. I discovered this as well. Actually, I sent out a patch for some
people to test it. I submitted a slightly different patch to John in
which tx in unmuted upon receiving a beacon.

>> > One of the major unresolved issues in the patch is what to do with the
>> > data in struct locale_mimo_info. The regulatory rules only hold one
>> > power level. I'm unsure why the brcmsmac implementation differs in this
>> > regard. Suggestions?
> This is still one of the largest unsolved issues. I'm probably going to
> need some advice on how to fill out the txpwr information when
> regualtory rules external to the driver can be applied.
>

The power constraints for HT (covered by struct locale_mimo_info) are
handled differently from non-HT. I have to confirm internally whether
this is specific for our devices or actually needed to be compliant.

Gr. AvS



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