Re: [PATCH v4 3/4] drm/tyr: add GPU reset infrastructure

["Danilo Krummrich" <dakr@kernel.org>]

On Sat Aug 15, 2026 at 12:23 PM CEST, Onur Özkan wrote:
> +#[pin_data]
> +struct Controller<'bound> {

Please only use the lifetime name 'bound for bus device private data (which
defines the 'bound lifetime). Everything within is shorter lived and should
carry a different name (see also [1]).

I'd suggest 'ctrl or just 'a, once you have self-referencial fields 'ctrl (or
similar) is preferred.

[1] https://lore.kernel.org/all/DKAINVQDNE79.3JRKZDQJCSX9@kernel.org/

> +    fn reset_work(self: &Arc<Self>) {
> +        if !self.try_transition(ResetState::Pending, ResetState::InProgress) {
> +            return;
> +        }
> +
> +        dev_info!(self.pdev, "Starting GPU reset.\n");

Please use dev_dbg!().

> +        // Wait for current hardware accesses to finish before resetting.
> +        let reset_guard = self.hw.close();
> +        let reset_result = run_reset(self.pdev.as_ref(), &self.iomem);
> +        drop(reset_guard);
> +
> +        if let Err(e) = reset_result {
> +            dev_err!(self.pdev, "GPU reset failed: {:?}\n", e);
> +
> +            // TODO: Unplug the GPU.
> +            // There is no API for unplugging the GPU and this is unreachable
> +            // for now since there are no hardware users for reset API.
> +        } else {
> +            dev_info!(self.pdev, "GPU reset completed.\n");

Same here.

> +        }
> +
> +        let _ = self.try_transition(ResetState::InProgress, ResetState::Idle);
> +    }
> +}
> +
> +/// User-facing handle for scheduling resets.
> +///
> +/// Dropping the handle drains any queued or in-flight reset work before the
> +/// [`ScopedQueue`] and the clock and regulator resources are released.
> +pub(crate) struct ResetHandle<'bound> {

Same as above 'reset or just 'a.

> +    controller: Arc<Controller<'bound>>,

This can just be ScopedWork<Controller<'a>>; no extra reference count and
allocation needed, as the constructor gives you an impl PinInit.

It also gets you rid of the open-coded cancel_sync() call in the destructor of
ResetHandle.

Also note that [2] already has Send + Sync for OwnedQueue when OwnedQueue is
introduced, so you can drop patch 1 of this series.

Thanks,
Danilo

[2] https://lore.kernel.org/all/20260807165252.3849875-1-dakr@kernel.org/