[Intel-gfx] [PATCH] drm/i915: initialize gen6 rps work queue for Ironlake+

[Ian Romanick]

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On 05/18/2011 06:21 PM, Jesse Barnes wrote:
> Looks like I didn't merge Ben's RPS work queue stuff correctly with the
> new IRQ split code (diff was sparse enough that git didn't complain).
> This should prevent null derefs on ILK+ due to the missing work queue.

Is this actually needed on Ironlake (i.e., gen5)?

> Signed-off-by:  Jesse Barnes <jbarnes at virtuousgeek.org>
> 
> diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
> index 349a03e..9112bf5 100644
> --- a/drivers/gpu/drm/i915/i915_irq.c
> +++ b/drivers/gpu/drm/i915/i915_irq.c
> @@ -1736,6 +1736,7 @@ void ironlake_irq_preinstall(struct drm_device *dev)
>  
>  	INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func);
>  	INIT_WORK(&dev_priv->error_work, i915_error_work_func);
> +	INIT_WORK(&dev_priv->rps_work, gen6_pm_rps_work);
>  
>  	I915_WRITE(HWSTAM, 0xeffe);
>  
> @@ -1887,7 +1888,6 @@ void i915_driver_irq_preinstall(struct drm_device * dev)
>  
>  	INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func);
>  	INIT_WORK(&dev_priv->error_work, i915_error_work_func);
> -	INIT_WORK(&dev_priv->rps_work, gen6_pm_rps_work);
>  
>  	if (I915_HAS_HOTPLUG(dev)) {
>  		I915_WRITE(PORT_HOTPLUG_EN, 0);

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