Claude review: drm/loongson: use managed KMS polling

[Claude Code Review Bot <claude-review@example.com>]

Overall Series Review

Subject: drm/loongson: use managed KMS polling
Author: Myeonghun Pak <mhun512@gmail.com>
Patches: 5
Reviewed: 2026-05-16T14:17:59.205016

---

This is a single-patch series that converts the loongson DRM driver from `drm_kms_helper_poll_init()` to the managed variant `drmm_kms_helper_poll_init()`. The change is correct, well-motivated, and minimal.

The commit message clearly describes the problem: `lsdc_pci_probe()` calls `drm_kms_helper_poll_init()` early, but if subsequent steps (`drm_vblank_init`, `devm_request_irq`, `drm_dev_register`) fail, the probe function returns without calling `drm_kms_helper_poll_fini()`. Additionally, `lsdc_pci_remove()` (line 324-330 of `lsdc_drv.c`) never calls `drm_kms_helper_poll_fini()` either, so even on clean removal, polling resources leak.

The fix is appropriate: `drmm_kms_helper_poll_init()` uses `drmm_add_action_or_reset()` to tie the poll cleanup to the DRM device lifetime, so finalization happens automatically on both error-path teardown and normal device removal.

**Verdict: Looks good.** This is a clean, minimal fix following the same pattern already adopted by `ast`, `hibmc`, and `udl` drivers in-tree.

---
Generated by Claude Code Patch Reviewer