[PATCH 6.1 216/272] wifi: iwlwifi: fw: dont always use FW dump trig

[Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>]

6.1-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Johannes Berg <johannes.berg@xxxxxxxxx>

commit 045a5b645dd59929b0e05375f493cde3a0318271 upstream.

Since the dump_data (struct iwl_fwrt_dump_data) is a union,
it's not safe to unconditionally access and use the 'trig'
member, it might be 'desc' instead. Access it only if it's
known to be 'trig' rather than 'desc', i.e. if ini-debug
is present.

Cc: stable@xxxxxxxxxxxxxxx
Fixes: 0eb50c674a1e ("iwlwifi: yoyo: send hcmd to fw after dump collection completes.")
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@xxxxxxxxx>
Link: https://msgid.link/20240319100755.e2976bc58b29.I72fbd6135b3623227de53d8a2bb82776066cb72b@changeid
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/net/wireless/intel/iwlwifi/fw/dbg.c |   17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

--- a/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/dbg.c
@@ -2903,8 +2903,6 @@ static void iwl_fw_dbg_collect_sync(stru
 	struct iwl_fw_dbg_params params = {0};
 	struct iwl_fwrt_dump_data *dump_data =
 		&fwrt->dump.wks[wk_idx].dump_data;
-	u32 policy;
-	u32 time_point;
 	if (!test_bit(wk_idx, &fwrt->dump.active_wks))
 		return;
 
@@ -2935,13 +2933,16 @@ static void iwl_fw_dbg_collect_sync(stru
 
 	iwl_fw_dbg_stop_restart_recording(fwrt, &params, false);
 
-	policy = le32_to_cpu(dump_data->trig->apply_policy);
-	time_point = le32_to_cpu(dump_data->trig->time_point);
-
-	if (policy & IWL_FW_INI_APPLY_POLICY_DUMP_COMPLETE_CMD) {
-		IWL_DEBUG_FW_INFO(fwrt, "WRT: sending dump complete\n");
-		iwl_send_dbg_dump_complete_cmd(fwrt, time_point, 0);
+	if (iwl_trans_dbg_ini_valid(fwrt->trans)) {
+		u32 policy = le32_to_cpu(dump_data->trig->apply_policy);
+		u32 time_point = le32_to_cpu(dump_data->trig->time_point);
+
+		if (policy & IWL_FW_INI_APPLY_POLICY_DUMP_COMPLETE_CMD) {
+			IWL_DEBUG_FW_INFO(fwrt, "WRT: sending dump complete\n");
+			iwl_send_dbg_dump_complete_cmd(fwrt, time_point, 0);
+		}
 	}
+
 	if (fwrt->trans->dbg.last_tp_resetfw == IWL_FW_INI_RESET_FW_MODE_STOP_FW_ONLY)
 		iwl_force_nmi(fwrt->trans);