commit 3ec50b5eec6b0e92f862ba48c837fa5437dcd4a4
author Emmanuel Grumbach <emmanuel.grumbach@intel.com> Tue Feb 03 14:29:36 2015 +0200
committer Emmanuel Grumbach <emmanuel.grumbach@intel.com> Mon Mar 02 08:20:32 2015 +0200
tree 647c65d1339f0125b4f87a134a82582e92f3f2ff
parent 5a756c20c44fe8b41d8adce090a2cdc95f10ab49

iwlwifi: mvm: add trigger for firmware dump upon low RSSI

Lots of issues can be caught when the RSSI drops. Add the
ability to collect the firmware data at that point.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

drivers/net/wireless/iwlwifi/mvm/rx.c

diff --git a/drivers/net/wireless/iwlwifi/mvm/rx.c b/drivers/net/wireless/iwlwifi/mvm/rx.c
index 9b2c537..6177e24 100644
--- a/drivers/net/wireless/iwlwifi/mvm/rx.c
+++ b/drivers/net/wireless/iwlwifi/mvm/rx.c
@@ -345,6 +345,25 @@
 		struct iwl_mvm_sta *mvmsta;
 		mvmsta = iwl_mvm_sta_from_mac80211(sta);
 		rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status);
+
+		if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) &&
+		    ieee80211_is_beacon(hdr->frame_control)) {
+			struct iwl_fw_dbg_trigger_tlv *trig;
+			struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
+			bool trig_check;
+			s32 rssi;
+
+			trig = iwl_fw_dbg_get_trigger(mvm->fw,
+						      FW_DBG_TRIGGER_RSSI);
+			rssi_trig = (void *)trig->data;
+			rssi = le32_to_cpu(rssi_trig->rssi);
+
+			trig_check =
+				iwl_fw_dbg_trigger_check_stop(mvm, mvmsta->vif,
+							      trig);
+			if (trig_check && rx_status->signal < rssi)
+				iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL, 0);
+		}
 	}
 
 	rcu_read_unlock();