[Intel-gfx] [PATCH 15/19] drm/i915: Hold rpm wakeref for modifying the global seqno

[Michał Winiarski]

On Tue, Jan 02, 2018 at 03:12:31PM +0000, Chris Wilson wrote:
> To modify the global seqno may require rewriting a few registers, which
> requires us to hold the rpm wakeref. We must therefore take it around
> the call to i915_gem_set_global_seqno() in debugfs, on behalf of the
> user.
> 
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

Reviewed-by: Michał Winiarski <michal.winiarski at intel.com>

-Michał

> ---
>  drivers/gpu/drm/i915/i915_debugfs.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
> index d81cb2513069..2bb63073d73f 100644
> --- a/drivers/gpu/drm/i915/i915_debugfs.c
> +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> @@ -988,7 +988,10 @@ i915_next_seqno_set(void *data, u64 val)
>  	if (ret)
>  		return ret;
>  
> +	intel_runtime_pm_get(dev_priv);
>  	ret = i915_gem_set_global_seqno(dev, val);
> +	intel_runtime_pm_put(dev_priv);
> +
>  	mutex_unlock(&dev->struct_mutex);
>  
>  	return ret;
> -- 
> 2.15.1
> 
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