[Intel-gfx] [PATCH 5/5] drm/i915: Cancel non-persistent contexts on close

[Chris Wilson]

Quoting Chris Wilson (2019-08-06 14:47:25)
> +static int
> +set_persistence(struct i915_gem_context *ctx,
> +               const struct drm_i915_gem_context_param *args)
> +{
> +       if (args->size)
> +               return -EINVAL;
> +
> +       if (!args->value) {
> +               i915_gem_context_clear_persistence(ctx);
> +               return 0;
> +       }
> +
> +       if (!(ctx->i915->caps.scheduler & I915_SCHEDULER_CAP_PREEMPTION))
> +               return -ENODEV;
> +
> +       i915_gem_context_set_persistence(ctx);
> +       return 0;
> +}

Oops, that is back-to-front. We can only switch off persistent behaviour if
we can do the preempt.
-Chris