[Intel-gfx] [PATCH 1/2] drm/i915: Flush the PTEs after updating them before suspend

[Chris Wilson]

On Wed, Aug 13, 2014 at 01:32:08PM +0200, Daniel Vetter wrote:
> On Wed, Aug 13, 2014 at 11:51:54AM +0100, Chris Wilson wrote:
> > As we use WC updates of the PTE, we are responsible for notifying the
> > hardware when to flush its TLBs. Do so after we zap all the PTEs before
> > suspend (and the BIOS tries to read our GTT).
> > 
> > Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> 
> Imo would make more sense to add them to the clear_range functions.

They are not required in the clear_range function. Here it is only
required in the i915_gem_suspend_gtt_mapping() because a third party
is involved.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre