[Intel-gfx] [PATCH 3/7] drm/i915/psr: Initialize PSR mutex even when sink is not reliable

[Dhinakaran Pandiyan]

On Wed, 2019-04-03 at 16:35 -0700, José Roberto de Souza wrote:
> Even when driver is reloaded and hits this scenario the PSR mutex
> should be initialized, otherwise reading PSR debugfs status will
> execute mutex_lock() over a mutex that was not initialized.
> 
> Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
> Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
> Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
> ---
>  drivers/gpu/drm/i915/intel_psr.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_psr.c
> b/drivers/gpu/drm/i915/intel_psr.c
> index c80bb3003a7d..a84da931c3be 100644
> --- a/drivers/gpu/drm/i915/intel_psr.c
> +++ b/drivers/gpu/drm/i915/intel_psr.c
> @@ -1227,7 +1227,6 @@ void intel_psr_init(struct drm_i915_private *dev_priv)
>  	if (val) {
>  		DRM_DEBUG_KMS("PSR interruption error set\n");
>  		dev_priv->psr.sink_not_reliable = true;
Should we just sink_support = false and keep the return? IOW is there any use
for sink_not_reliable?

> -		return;
>  	}


>  
>  	/* Set link_standby x link_off defaults */