RendererDRMPRIMEGLES: Fix leak of EGL fences

[popcornmix]

Description

Fix leak of EGL fences

Motivation and context

When running on wayland in a desktop window, kodi will crash with 'Too many open files' after a minute of so of video playback.

I've tracked it down the EGL fences. Render gets called more often than ReleaseBuffer (I'm seeing two Render calls per ReleaseBuffer call).

As we allocate a fence in Render and free in ReleaseBuffer this leaks.

It's safe to call DestroyFence on a non-created fence so use that to stop the leak

How has this been tested?

I've had kodi running on a Pi4 in a wayland window looping video for most of the day

What is the effect on users?

Stops it crashing on video playback

Screenshots (if appropriate):

Types of change

• Bug fix (non-breaking change which fixes an issue)
• Clean up (non-breaking change which removes non-working, unmaintained functionality)
• Improvement (non-breaking change which improves existing functionality)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that will cause existing functionality to change)
• Cosmetic change (non-breaking change that doesn't touch code)
• None of the above (please explain below)

Checklist:

• My code follows the Code Guidelines of this project
• My change requires a change to the documentation, either Doxygen or wiki
• I have updated the documentation accordingly
• I have read the Contributing document
• I have added tests to cover my change
• All new and existing tests passed

[lrusak]

Thanks!

[lrusak]

@popcornmix can you backport please?