[PS2] Not able to load roms from mass storage devices

First and foremost consider this:

• Only RetroArch bugs should be filed here. Not core bugs or game bugs
• This is not a forum or a help section, this is strictly developer oriented

Description

When trying to load roms from mass storage devices, retroarch will return to retroarch menu. When loading roms from memory card, it works as expected.

Expected behavior

It expected that Retroarch would load content from mass storage devices.

Actual behavior

When trying to load roms from mass storage devices, retroarch will return to retroarch menu.

Steps to reproduce the bug

1. Use wLaunchElf to load retroarch;
2. Load some emulator core (like snes2002);
3. Try to load some rom from mass storage device;
4. It will not load and return to retroarch menu.

Bisect Results

I didn't try any other version before 1.10.0, but this version and all later version has the same behavior.

Version/Commit

You can find this information under Information/System Information

• RetroArch: 1.14.0/ad89b0c6

Reproduce the failure on a PlayStation 2 by loading RetroArch through wLaunchElf, then compare loading a ROM from a memory card with loading one from a mass storage device. Start with the content-loading path and the PS2 platform behavior; done means ROMs from mass storage load without returning to the RetroArch menu.