iwlwifi: pcie: dump_stack upon timeout of SYNC cmd

Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

drivers/net/wireless/iwlwifi/pcie/tx.c

@@ -1529,6 +1529,7 @@ static int iwl_pcie_send_hcmd_sync(struct iwl_trans *trans,
 				"Error sending %s: time out after %dms.\n",
 				get_cmd_string(trans_pcie, cmd->id),
 				jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
+			dump_stack();
 
 			IWL_ERR(trans,
 				"Current CMD queue read_ptr %d write_ptr %d\n",