Magento 1.9.2.1 custom modules are showing 404 after SUPEE-6788

Question

I have uploaded patch SUPEE-6788 on Magento 1.9.2.1 and tried the following:

• Using This file I have fixed all the modules through command line after uploading the patch.
• I have also fixed whitelisting issues using the same file.
• Tried logging out of admin and re logged in.
• Removed all cache from /var/cache.
• Reindexed my store.

But still all custom modules are showing page 404 in admin.

Note: All the code of custom module is as per This Solution

The functionality is working fine on frontend but admin pages of these modules are not working.

As I have checked after using the FIX code the action in config is the same before and after fix. Check below:

<menu>
      <banners module="banners">
        <title>Banners</title>
        <sort_order>100</sort_order>
        <children>
          <banners module="banners">
            <title>Manage Banners</title>
            <sort_order>0</sort_order>
            <action>admin_banners/adminhtml_banners</action>
          </banners>
        </children>
      </banners>
    </menu> 

Update 1

After applying changes mentioned by Kunj following is my action code and controller file location:

<action>adminhtml/banners/banners</action>

Controller for above action :

app/code/local/{My_Package}/Banners/controllers/Adminhtml/Banners/BannersController.php

I have re-indexed, cleared cache, Logged out and logged in but it still shows page 404.

Answer 1

I think your action should be like this:

<action>adminhtml/banners</action>

And as per action your file path should be like this:

/path/to/magento/app/code/local/{module package name}/Banners/controllers/Adminhtml/Banners/IndexController.php