From: Ilan Peer <ilan.peer@xxxxxxxxx>
To improve chances of hearing beacons and probe responses during
a scan which (based on the scan request parameters) looks like a
roaming scan, enable reception on all chains.
Signed-off-by: Ilan Peer <ilan.peer@xxxxxxxxx>
Signed-off-by: Luca Coelho <luciano.coelho@xxxxxxxxx>
---
drivers/net/wireless/intel/iwlwifi/mvm/scan.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/scan.c b/drivers/net/wireless/intel/iwlwifi/mvm/scan.c
index ce8bdbc70b7e..a138b5c4cce8 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/scan.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/scan.c
@@ -1995,8 +1995,16 @@ static u16 iwl_mvm_scan_umac_flags_v2(struct iwl_mvm *mvm,
{
u16 flags = 0;
+ /*
+ * If no direct SSIDs are provided perform a passive scan. Otherwise,
+ * if there is a single SSID which is not the broadcast SSID, assume
+ * that the scan is intended for roaming purposes and thus enable Rx on
+ * all chains to improve chances of hearing the beacons/probe responses.
+ */
if (params->n_ssids == 0)
flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_FORCE_PASSIVE;
+ else if (params->n_ssids == 1 && params->ssids[0].ssid_len)
+ flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_USE_ALL_RX_CHAINS;
if (iwl_mvm_is_scan_fragmented(params->type))
flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC1;
--
2.33.0
