[PATCH] mt76: fix 802.3 RX fail by hdr_trans

[Felix Fietkau]

On 2021-12-02 08:40, Deren Wu wrote:
> From: Deren Wu <deren.wu at mediatek.com>
> 
> Should not run hdr_trans process for 802.3 packets,
> this would cause all data frame RX fail.
> 
> Fixes: d9930ec65b9f ("mt76: only set rx radiotap flag from within decoder functions")
> Reviewed-by: Ryder Lee <ryder.lee at mediatek.com>
> Signed-off-by: Deren Wu <deren.wu at mediatek.com>
> ---
>   drivers/net/wireless/mediatek/mt76/mt7915/mac.c | 2 +-
>   drivers/net/wireless/mediatek/mt76/mt7921/mac.c | 3 +--
>   2 files changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
> index 6c14cb1cfd5a..5757284b24a5 100644
> --- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
> +++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
> @@ -794,7 +794,7 @@ mt7915_mac_fill_rx(struct mt7915_dev *dev, struct sk_buff *skb)
>   		status->flag |= RX_FLAG_8023;
>   	}
>   
> -	if (rxv && mode >= MT_PHY_TYPE_HE_SU)
> +	if (rxv && mode >= MT_PHY_TYPE_HE_SU && !(status->flag & RX_FLAG_8023))
>   		mt7915_mac_decode_he_radiotap(skb, rxv, mode);
>   
>   	if (!status->wcid || !ieee80211_is_data_qos(fc))
> diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
> index e17c8f4c9747..eaffe665cb28 100644
> --- a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
> +++ b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
> @@ -780,7 +780,6 @@ mt7921_mac_fill_rx(struct mt7921_dev *dev, struct sk_buff *skb)
>   			mt76_insert_ccmp_hdr(skb, key_id);
>   		}
>   
> -		hdr = mt76_skb_get_hdr(skb);
This line is not safe to remove, since mt76_insert_ccmp_hdr moves the 
header. However, there is a redundant call to mt76_skb_get_hdr above 
this part, which you can remove. Please do that in a separate patch 
though, since it has nothing to do with the rest of the changes.

Thanks,

- Felix