Do not rely on controller being available in params.

app/controllers/devise/sessions_controller.rb

@@ -10,7 +10,7 @@ class Devise::SessionsController < ApplicationController
 
   # POST /resource/sign_in
   def create
-    resource = warden.authenticate!(:scope => resource_name, :recall => "new")
+    resource = warden.authenticate!(:scope => resource_name, :recall => "#{controller_name}#new")
     set_flash_message :notice, :signed_in
     sign_in_and_redirect(resource_name, resource)
   end

lib/devise/failure_app.rb

@@ -41,7 +41,7 @@ module Devise
     def recall
       env["PATH_INFO"]  = attempted_path
       flash.now[:alert] = i18n_message(:invalid)
-      self.response = recall_controller.action(warden_options[:recall]).call(env)
+      self.response = recall_app(warden_options[:recall]).call(env)
     end
 
     def redirect
@@ -94,8 +94,9 @@ module Devise
       {}.respond_to?(method) ? { :error => i18n_message }.send(method) : i18n_message
     end
 
-    def recall_controller
-      "#{params[:controller].camelize}Controller".constantize
+    def recall_app(app)
+      controller, action = app.split("#")
+      "#{controller.camelize}Controller".constantize.action(action)
     end
 
     def warden

test/failure_app_test.rb

@@ -136,8 +136,7 @@ class FailureTest < ActiveSupport::TestCase
   context 'With recall' do
     test 'calls the original controller' do
       env = {
-        "action_dispatch.request.parameters" => { :controller => "devise/sessions" },
-        "warden.options" => { :recall => "new", :attempted_path => "/users/sign_in" },
+        "warden.options" => { :recall => "devise/sessions#new", :attempted_path => "/users/sign_in" },
         "devise.mapping" => Devise.mappings[:user],
         "warden" => stub_everything
       }