[Intel-gfx] i915_gem_init_aliasing_ppgtt() loop after 55a254ac63a3ac1867d1501030e7fba69c7d4aeb

Konstantin Belousov kostikbel at gmail.com
Thu Apr 5 14:04:39 CEST 2012

On Thu, Apr 05, 2012 at 01:55:12PM +0200, Daniel Vetter wrote:
> On Thu, Apr 5, 2012 at 13:04, Konstantin Belousov <kostikbel at gmail.com> wrote:
> > it seems that the loop in i915_gem_init_aliasing_ppgtt() over pd_entries
> > that calculates pt_addr does nothing after the commit 55a254ac in the
> > !dmar case. Would it be better to move needs_dmar check over the whole
> > loop ?
> For the !dmar case we still need need to compute the physical address
> with page_to_phys, so I think the loop is needed.

Does linux' page_to_phys() has side effects ? I just fail to see where the
pt_addr is used after the calculation.
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