[RFC v1] mt76: mt7615: mt7622: fix adhoc and ibss mode

[Daniel Golle]

On Thu, Oct 07, 2021 at 11:23:23PM +0200, Nick Hainke wrote:
> Subject: [RFC v1] mt76: mt7615: mt7622: fix adhoc and ibss mode
Ad-Hoc and IBSS mode are synonyms.
What probably meant to write 'fix adhoc and mesh mode', right?

> Fixes: d8d59f66d136 ("mt76: mt7615: support 16 interfaces").
> 
> commit 7f4b7920318b ("mt76: mt7615: add ibss support") introduced IBSS
> and commit f4ec7fdf7f83 ("mt76: mt7615: enable support for mesh")
> meshpoint support.
> 
> Both used in the "get_omac_idx"-function:
> 
> 	if (~mask & BIT(HW_BSSID_0))
> 		return HW_BSSID_0;
> 
> With commit d8d59f66d136 ("mt76: mt7615: support 16 interfaces") the
> adhoc and meshpoint mode should "prefer hw bssid slot 1-3". However,
> with that change the ibss or meshpoint mode will not send any beacon on
> the mt7622 wifi anymore. Devices were still able to exchange data but
> only if a bssid already existed. Two mt7622 devices will never be able
> to communicate.
> 
> This commits reverts the preferation of slot 1-3 for adhoc and
> meshpoint. Only NL80211_IFTYPE_STATION will still prefer slot 1-3.
> 
> Tested on Banana Pi R64.
> 
> Signed-off-by: Nick Hainke <vincent at systemli.org>
> ---
>  drivers/net/wireless/mediatek/mt76/mt7615/main.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/main.c b/drivers/net/wireless/mediatek/mt76/mt7615/main.c
> index dada43d6d879..51260a669d16 100644
> --- a/drivers/net/wireless/mediatek/mt76/mt7615/main.c
> +++ b/drivers/net/wireless/mediatek/mt76/mt7615/main.c
> @@ -135,8 +135,6 @@ static int get_omac_idx(enum nl80211_iftype type, u64 mask)
>  	int i;
>  
>  	switch (type) {
> -	case NL80211_IFTYPE_MESH_POINT:
> -	case NL80211_IFTYPE_ADHOC:
>  	case NL80211_IFTYPE_STATION:
>  		/* prefer hw bssid slot 1-3 */
>  		i = get_free_idx(mask, HW_BSSID_1, HW_BSSID_3);
> @@ -160,6 +158,8 @@ static int get_omac_idx(enum nl80211_iftype type, u64 mask)
>  			return HW_BSSID_0;
>  
>  		break;
> +	case NL80211_IFTYPE_ADHOC:
> +	case NL80211_IFTYPE_MESH_POINT:
>  	case NL80211_IFTYPE_MONITOR:
>  	case NL80211_IFTYPE_AP:
>  		/* ap uses hw bssid 0 and ext bssid */
> -- 
> 2.33.0
> 
> 
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