Claude review: drm/imagination: Synchronize interrupts before suspending the GPU

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

Overall Series Review

Subject: drm/imagination: Synchronize interrupts before suspending the GPU
Author: Alessio Belle <alessio.belle@imgtec.com>
Patches: 2
Reviewed: 2026-05-27T15:07:57.136689

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This is a single-patch stable backport for kernel 6.12 that addresses a real race condition in the `drm/imagination` (PowerVR) driver. During runtime PM suspend, the GPU can be powered off while an IRQ handler is still executing on another CPU core, causing a synchronous external abort when the handler tries to access GPU registers.

The upstream fix (commit `2d7f05cddf4c`) uses `disable_irq()`/`enable_irq()` pairs in `pvr_power_fw_disable`/`pvr_power_fw_enable`, which is the complete solution. This backport correctly identifies that 6.12 lacks the `pvr_power_fw_enable` counterpart infrastructure (and other code added in 6.16) and instead uses the simpler `synchronize_irq()` — a minimal, appropriate fix for the stable branch.

The patch is well-motivated with a clear crash signature, properly tagged with `Fixes:` and `Cc: stable`, carries the upstream `Reviewed-by` and `Signed-off-by` trailers, and is v2 addressing prior review feedback about missing trailers.

**Verdict: This patch looks correct and appropriate for 6.12 stable.**

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