fs/poll: add debug log for poll/epoll failed

[Donny9]

Summary

fs/poll: add debug log for poll/epoll failed

Impact

N/A

Testing

Vela

[nuttxpr]

[Experimental Bot, please feedback here]

This PR appears incomplete based on the NuttX requirements.

Here's why and what's missing:

• Summary:
  • Missing:
    • A clear explanation of why the debug logs are necessary. What problem are they solving?
    • Details on how the debug logs work - what information is logged, and under what conditions?
• Impact:
  • Potentially inaccurate: Even debug logs can have an impact. Consider:
    • Performance: Will the logs impact performance, especially under heavy load?
    • Storage: Where are the logs stored? Could they fill up limited storage?
    • Build: While the code change might be small, will it require any build system tweaks to enable/disable debug logging?
• Testing:
  • Insufficient: "Vela" alone is not descriptive enough.
    • Which Vela build targets were used? Be specific about the architectures and boards.
    • Provide snippets of the actual log output before and after the change to demonstrate the added debug information.

In short, the PR needs more context and detail to be properly evaluated.