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Re: [RFC 5/6] ath9k: enable DFS pulse detection

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On Tue, Oct 4, 2011 at 3:11 AM, Zefir Kurtisi <zefir.kurtisi@xxxxxxxxxxx> wrote:
> On 10/03/2011 08:27 PM, Luis R. Rodriguez wrote:
>> On Mon, Oct 3, 2011 at 3:29 AM, Zefir Kurtisi <zefir.kurtisi@xxxxxxxxxxx> wrote:
>>>
>>> Signed-off-by: Zefir Kurtisi <zefir.kurtisi@xxxxxxxxxxx>
>>> ---
>>>  drivers/net/wireless/ath/ath9k/main.c |   12 ++++++++++++
>>>  1 files changed, 12 insertions(+), 0 deletions(-)
>>>
>>> diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
>>> index e8aeb98..5defebe 100644
>>> --- a/drivers/net/wireless/ath/ath9k/main.c
>>> +++ b/drivers/net/wireless/ath/ath9k/main.c
>>> @@ -344,6 +344,18 @@ static int ath_reset_internal(struct ath_softc *sc, struct ath9k_channel *hchan,
>>>                        "Unable to reset channel, reset status %d\n", r);
>>>                goto out;
>>>        }
>>> +#ifdef CONFIG_ATH9K_DFS
>>> +       /**
>>> +        * enable radar pulse detection
>>> +        *
>>> +        * TODO: do this only for DFS channels
>>> +        */
>>> +       ah->private_ops.set_radar_params(ah, &ah->radar_conf);
>>> +       ath9k_hw_setrxfilter(ah,
>>> +                       ath9k_hw_getrxfilter(ah) | ATH9K_RX_FILTER_PHYRADAR);
>>> +       ath_dbg(common, ATH_DBG_DFS,
>>> +               "DFS enabled for channel %d\n", hchan->chan->center_freq);
>>> +#endif
>>
>> Please spare the #ifdef and just call something within dfs.c, then
>> dfs.h would wrap it to nothing if DFS is disabled.
>>
> This possibly won't work, since setting up DFS registers is part of HW layer and not
> done in the dfs module. If you want to have DFS conditionally compilable, you can not spare this #ifdefs.

Its not about sparing the ifdefs completely but instead to place them
strategically to remove #ifdef sprinkling all over C code. You can
leave ifdefs on header files, and for C files leaves this as a
conditional build time option.

  Luis
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