| Message ID | 20250207060005.153835-1-quic_rdevanat@quicinc.com (mailing list archive) |
|---|---|
| State | Accepted |
| Delegated to: | Jeff Johnson |
| Headers | show |
| Series | wifi: ath12k: Improve BSS discovery with hidden SSID in 6 GHz band | expand |
On 2/7/2025 11:30 AM, Roopni Devanathan wrote: > From: Ramasamy Kaliappan <quic_rkaliapp@quicinc.com> > > Currently, sometimes, the station is unable to identify the configured > AP SSID in its scan results when the AP is not broadcasting its name > publicly and has a hidden SSID. > > Currently, channel dwell time for an ath12k station is 30 ms. Sometimes, > station can send broadcast probe request to AP close to the end of dwell > time. In some of these cases, before AP sends a response to the received > probe request, the dwell time on the station side would come to an end. > So, the station will move to scan next channel and will not be able to > acknowledge the unicast probe response. > > Resolve this issue by increasing station's channel dwell time to 70 ms, > so that the it remains on the same channel for a longer period. This > would increase the station's chance of receiving probe response from the > AP. The station will then send a response acknowledgment back to the AP, > thus leading to successful scan and BSS discovery. > > With an increased dwell time, scan would take longer than it takes now. > But, this fix is an improvement for hidden SSID scan issue. > > Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1 > > Signed-off-by: Ramasamy Kaliappan <quic_rkaliapp@quicinc.com> > Signed-off-by: Roopni Devanathan <quic_rdevanat@quicinc.com> Reviewed-by: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@oss.qualcomm.com>
On Fri, 07 Feb 2025 11:30:05 +0530, Roopni Devanathan wrote: > Currently, sometimes, the station is unable to identify the configured > AP SSID in its scan results when the AP is not broadcasting its name > publicly and has a hidden SSID. > > Currently, channel dwell time for an ath12k station is 30 ms. Sometimes, > station can send broadcast probe request to AP close to the end of dwell > time. In some of these cases, before AP sends a response to the received > probe request, the dwell time on the station side would come to an end. > So, the station will move to scan next channel and will not be able to > acknowledge the unicast probe response. > > [...] Applied, thanks! [1/1] wifi: ath12k: Improve BSS discovery with hidden SSID in 6 GHz band commit: 27d38bdfd416f4db70e09c3bef3b030c86fd235a Best regards,
diff --git a/drivers/net/wireless/ath/ath12k/wmi.c b/drivers/net/wireless/ath/ath12k/wmi.c index f934d49acee6..0faf1674f9a2 100644 --- a/drivers/net/wireless/ath/ath12k/wmi.c +++ b/drivers/net/wireless/ath/ath12k/wmi.c @@ -2433,8 +2433,8 @@ void ath12k_wmi_start_scan_init(struct ath12k *ar, arg->dwell_time_active = 50; arg->dwell_time_active_2g = 0; arg->dwell_time_passive = 150; - arg->dwell_time_active_6g = 40; - arg->dwell_time_passive_6g = 30; + arg->dwell_time_active_6g = 70; + arg->dwell_time_passive_6g = 70; arg->min_rest_time = 50; arg->max_rest_time = 500; arg->repeat_probe_time = 0;