iwlwifi: mvm: add trigger for firmware dump upon channel switch

We fire the trigger when the channel switch starts, but
the delay is configurable. That makes is easier to catch
channel switches that fail.

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

diff --git a/drivers/net/wireless/iwlwifi/iwl-fw-error-dump.h b/drivers/net/wireless/iwlwifi/iwl-fw-error-dump.h
index 7d7412681913ca37c1c2415ec0e51fe007ab8f96..1ee58b3dca1d565bcb6b9ff891cd1ac574451142 100644 (file)
--- a/drivers/net/wireless/iwlwifi/iwl-fw-error-dump.h
+++ b/drivers/net/wireless/iwlwifi/iwl-fw-error-dump.h
@@ -243,12 +243,14 @@ iwl_fw_error_next_data(struct iwl_fw_error_dump_data *data)
  * @FW_DBG_TRIGGER_FW_ASSERT: trigger log collection when the firmware asserts
  * @FW_DBG_TRIGGER_MISSED_BEACONS: trigger log collection when beacons are
  *     missed.
+ * @FW_DBG_TRIGGER_CHANNEL_SWITCH: trigger log collection upon channel switch.
  */
 enum iwl_fw_dbg_trigger {
        FW_DBG_TRIGGER_INVALID = 0,
        FW_DBG_TRIGGER_USER,
        FW_DBG_TRIGGER_FW_ASSERT,
        FW_DBG_TRIGGER_MISSED_BEACONS,
+       FW_DBG_TRIGGER_CHANNEL_SWITCH,
 
        /* must be last */
        FW_DBG_TRIGGER_MAX,

diff --git a/drivers/net/wireless/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
index 3b6b9f6031aeb3026df4bfab939089c4efafeae4..5a5d5c8544fc8725433d8f59b52ca868befdc6f8 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
@@ -3481,6 +3481,9 @@ static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
        IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n",
                           chsw->chandef.center_freq1);
 
+       iwl_fw_dbg_trigger_simple_stop(mvm, vif, FW_DBG_TRIGGER_CHANNEL_SWITCH,
+                                      NULL, 0);
+
        switch (vif->type) {
        case NL80211_IFTYPE_AP:
                csa_vif =