[Intel-gfx] [PATCH 1/6] drm/i915: Fix gen4 GPU reset

[Ville Syrjälä]

On Sat, Nov 22, 2014 at 11:05:15AM +0000, Chris Wilson wrote:
> On Fri, Nov 21, 2014 at 09:54:25PM +0200, ville.syrjala at linux.intel.com wrote:
> > +	/* assert reset for at least 20 usec */
> > +	pci_write_config_byte(dev->pdev, I965_GDRST, GRDOM_RESET_ENABLE);
> 
> Is this an UC write or do we need to post?

I believe config space writes should always be be non-posted.

> 
> > +	udelay(20);
> >  	pci_write_config_byte(dev->pdev, I965_GDRST, 0);
> -Chris
> 
> -- 
> Chris Wilson, Intel Open Source Technology Centre

-- 
Ville Syrjälä
Intel OTC