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Re: [PATCH 2/3] mac80211: reset TSF to 0 when joining a mesh

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On Mon, Dec 16, 2013 at 4:33 AM, Sergey Ryazanov <ryazanov.s.a@xxxxxxxxx> wrote:
> Hello Thomas,
>
> 2013/12/16 Thomas Pedersen <twpedersen@xxxxxxxxx>:
>> diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
>> index 330d1f7..1174157 100644
>> --- a/net/mac80211/mesh.c
>> +++ b/net/mac80211/mesh.c
>> @@ -802,6 +802,8 @@ int ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
>>                 return -ENOMEM;
>>         }
>>
>> +       /* next beacon will be DTIM-1, so TSF=0 was DTIM=0 */
>> +       drv_set_tsf(local, sdata, 0);
>>         ieee80211_bss_info_change_notify(sdata, changed);
>>
>>         netif_carrier_on(sdata->dev);
>
> What happen with AP interface on the same radio if we configure mesh
> portal? Clients could be confused by such TSF jump.

Like Johannes said; either the driver supports per-vif TSF, or well,
it doesn't. Anyway wouldn't clients reset their own TSF when the new
beacon is received?

Thomas
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