Re: [PATCH ath-current v2] wifi: ath12k: fix wrong TID passed when stopping AMPDU session

[Baochen Qiang <baochen.qiang@oss.qualcomm.com>]

On 1/28/2026 7:39 AM, Jeff Johnson wrote:
> On 1/26/2026 9:36 AM, Pablo Martin-Gomez wrote:
>> When handling a DELBA request, ath12k_dp_rx_ampdu_stop() calls
>> ath12k_peer_rx_tid_reo_update() to tear down the BA session for the
>> specified TID. However, it currently passes peer->rx_tid instead of the
>> entry corresponding to params->tid.
>>
>> Since peer->rx_tid is an array, this decays to a pointer to the first
>> element, effectively operating on TID 0 regardless of the TID in the
>> DELBA request. As a result, the BA session for TID 0 is stopped while
>> the intended TID remains active.
>>
>> This leads to incorrect BA session state and may significantly reduce
>> RX throughput, as traffic that should use aggregation falls back to a
>> BA window size of 1 on TID 0.
>>
>> Fix this by passing the correct TID entry:
>>   &peer->rx_tid[params->tid]
>>
>> Fixes: d889913205cf ("wifi: ath12k: driver for Qualcomm Wi-Fi 7 devices")
>> Signed-off-by: Pablo Martin-Gomez <pmartin-gomez@freebox.fr>
>> ---
>>  drivers/net/wireless/ath/ath12k/dp_rx.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/net/wireless/ath/ath12k/dp_rx.c b/drivers/net/wireless/ath/ath12k/dp_rx.c
>> index d28d8ffec0f8..f2327c82953b 100644
>> --- a/drivers/net/wireless/ath/ath12k/dp_rx.c
>> +++ b/drivers/net/wireless/ath/ath12k/dp_rx.c
>> @@ -1289,7 +1289,7 @@ int ath12k_dp_rx_ampdu_stop(struct ath12k *ar,
>>  		return 0;
>>  	}
>>  
>> -	ret = ath12k_peer_rx_tid_reo_update(ar, peer, peer->rx_tid, 1, 0, false);
>> +	ret = ath12k_peer_rx_tid_reo_update(ar, peer, &peer->rx_tid[params->tid], 1, 0, false);
> 
> like the ath11k change, this also triggers ath12k-check:
> drivers/net/wireless/ath/ath12k/dp_rx.c:1292: line length of 95 exceeds 90 columns
> 
> I'll break this line when I process the patch
> 
>>  	spin_unlock_bh(&ab->base_lock);
>>  	if (ret) {
>>  		ath12k_warn(ab, "failed to update reo for rx tid %d: %d\n",
> 
> 

Reviewed-by: Baochen Qiang <baochen.qiang@oss.qualcomm.com>