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Re: [PATCH 3/4] mac80211: Allow nonHT/HT peering in mesh

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Hello John,

On Mon, Apr 30, 2012 at 12:09 PM, John W. Linville
<linville@xxxxxxxxxxxxx> wrote:
> On Thu, Apr 26, 2012 at 08:48:25PM -0700, Ashok Nagarajan wrote:
>> Now that we have protection enabled, allow non-HT and HT20 stations to peer
>> with HT40+/- stations. Peering is still disallowed for HT40+/- mismatch.
>>
>> Signed-off-by: Ashok Nagarajan <ashok@xxxxxxxxxxx>
>> Reviewed-by: Thomas Pedersen <thomas@xxxxxxxxxxx>
>
>  CC      net/mac80211/mesh.o
> net/mac80211/mesh.c: In function ‘mesh_matches_local’:
> net/mac80211/mesh.c:79:28: warning: ‘sta_channel_type’ may be used uninitialized in this function
>
> Please don't add warnings!
>
Sorry for the warning. Version 2 is coming.

Thanks,
Ashok
>> ---
>>  net/mac80211/mesh.c |   12 +++++++++---
>>  1 files changed, 9 insertions(+), 3 deletions(-)
>>
>> diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
>> index 8a952e0..d25cb78 100644
>> --- a/net/mac80211/mesh.c
>> +++ b/net/mac80211/mesh.c
>> @@ -76,6 +76,7 @@ bool mesh_matches_local(struct ieee80211_sub_if_data *sdata,
>>       struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
>>       struct ieee80211_local *local = sdata->local;
>>       u32 basic_rates = 0;
>> +     enum nl80211_channel_type sta_channel_type;
>>
>>       /*
>>        * As support for each feature is added, check for matching
>> @@ -102,10 +103,15 @@ bool mesh_matches_local(struct ieee80211_sub_if_data *sdata,
>>       if (sdata->vif.bss_conf.basic_rates != basic_rates)
>>               goto mismatch;
>>
>> -     /* disallow peering with mismatched channel types for now */
>> +     if (ie->ht_operation)
>> +             sta_channel_type =
>> +                     ieee80211_ht_oper_to_channel_type(ie->ht_operation);
>> +
>> +     /* Disallow HT40+/- mismatch */
>>       if (ie->ht_operation &&
>> -         (local->_oper_channel_type !=
>> -          ieee80211_ht_oper_to_channel_type(ie->ht_operation)))
>> +         local->_oper_channel_type > NL80211_CHAN_HT20 &&
>> +         sta_channel_type > NL80211_CHAN_HT20 &&
>> +         local->_oper_channel_type != sta_channel_type)
>>               goto mismatch;
>>
>>       return true;
>> --
>> 1.7.5.4
>>
>>
>
> --
> John W. Linville                Someday the world will need a hero, and you
> linville@xxxxxxxxxxxxx                  might be all we have.  Be ready.
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