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Re: [PATCH v2 3/3] mac80211: don't defer scans in case of radar detection

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On Sun, Feb 8, 2015 at 5:56 PM, Jouni Malinen <j@xxxxx> wrote:
>> I don't see why returning EBUSY is wrong, though.
>> Actually, it just make the test fail immediately, instead of waiting
>> indefinitely until a timeout occurs (i guess, didn't actually test it
>> with the reverted patch).
>> This was exactly the intended behavior, and i think it makes much more sense.
>
> I have no issues with EBUSY being returned for a case where an
> offchannel operation would be required while on a channel that require
> constant monitoring for radars. I guess it would be fine to run a
> single-channel scan on that same channel in such a state, but I'm not
> sure whether this code prevents that or not. (Or whether there is really
> that much of a real use case for such an operation.)
>
See my answers to Janusz.
The current code blocks any scan (including on-channel one).
I guess an exception for on-channel scan can be added if needed.

Eliad.
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