Claude review: drm/loongson: Use managed KMS polling

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Overall Series Review

Subject: drm/loongson: Use managed KMS polling
Author: Myeonghun Pak <mhun512@gmail.com>
Patches: 1
Reviewed: 2026-05-16T12:30:12.889221

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This is a single-patch series that replaces `drm_kms_helper_poll_init()` with its managed counterpart `drmm_kms_helper_poll_init()` in the loongson LSDC driver. The change is correct, well-motivated, and has already been reviewed/acked by the relevant maintainers.

**Assessment: Good to merge.**

The commit message clearly identifies the problem: `drm_kms_helper_poll_init()` is called early in probe, but if later steps (`drm_vblank_init`, `devm_request_irq`, `drm_dev_register`) fail, the driver returns without calling `drm_kms_helper_poll_fini()`. Additionally, `lsdc_pci_remove()` (line 324-330 in the current tree) never calls `drm_kms_helper_poll_fini()` either — it only does `drm_dev_unregister()` and `drm_atomic_helper_shutdown()`. Using `drmm_kms_helper_poll_init()` ties the polling lifecycle to the DRM device managed cleanup, fixing both the error-path leak and the missing finalization on removal.

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