On Sat, Mar 22, 2014 at 08:58:29PM +0000, Chris Wilson wrote:
> On Sat, Mar 22, 2014 at 12:43:28PM -0700, Ben Widawsky wrote:
> > On Tue, Mar 18, 2014 at 08:44:28AM +0000, Chris Wilson wrote:
> > > On Mon, Mar 17, 2014 at 10:48:39PM -0700, Ben Widawsky wrote:
> > > > The old code (I'm having trouble finding the commit) had a reason for
> > > > doing things when there was an error, and would continue on, thus the
> > > > !ret. For the newer code however, this looks completely silly.
> > > >
> > > > Follow the normal idiom of if (ret) return ret.
> > > >
> > > > Also, put the pde wiring in the gen specific init, now that GEN8 exists.
> > > >
> > > > Signed-off-by: Ben Widawsky <b...@bwidawsk.net>
> > > > ---
> > > > drivers/gpu/drm/i915/i915_gem_gtt.c | 22 +++++++++-------------
> > > > 1 file changed, 9 insertions(+), 13 deletions(-)
> > > >
> > > > diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c
> > > > b/drivers/gpu/drm/i915/i915_gem_gtt.c
> > > > index 1620211..5f73284 100644
> > > > --- a/drivers/gpu/drm/i915/i915_gem_gtt.c
> > > > +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
> > > > @@ -1202,6 +1202,8 @@ static int gen6_ppgtt_init(struct i915_hw_ppgtt
> > > > *ppgtt)
> > > > ppgtt->pd_offset =
> > > > ppgtt->node.start / PAGE_SIZE * sizeof(gen6_gtt_pte_t);
> > > >
> > > > + gen6_write_pdes(ppgtt);
> > > > +
> > > > ppgtt->base.clear_range(&ppgtt->base, 0, ppgtt->base.total,
> > > > true);
> > > >
> > > > DRM_DEBUG_DRIVER("Allocated pde space (%ldM) at GTT entry:
> > > > %lx\n",
> > > > @@ -1226,20 +1228,14 @@ int i915_gem_init_ppgtt(struct drm_device *dev,
> > > > struct i915_hw_ppgtt *ppgtt)
> > > > else
> > > > BUG();
> > > >
> > > > - if (!ret) {
> > > > - struct drm_i915_private *dev_priv = dev->dev_private;
> > > > - kref_init(&ppgtt->ref);
> > > > - drm_mm_init(&ppgtt->base.mm, ppgtt->base.start,
> > > > - ppgtt->base.total);
> > > > - i915_init_vm(dev_priv, &ppgtt->base);
> > > > - if (INTEL_INFO(dev)->gen < 8) {
> > > > - gen6_write_pdes(ppgtt);
> > > > - DRM_DEBUG("Adding PPGTT at offset %x\n",
> > > > - ppgtt->pd_offset << 10);
> > > > - }
> > > > - }
> > > > + if (ret)
> > > > + return ret;
> > > >
> > > > - return ret;
> > > > + kref_init(&ppgtt->ref);
> > > > + drm_mm_init(&ppgtt->base.mm, ppgtt->base.start,
> > > > ppgtt->base.total);
> > > > + i915_init_vm(dev_priv, &ppgtt->base);
> > >
> > > Didn't we just delete the dev_priv local variable?
> > > -Chris
> >
> > The important part is that the pde writes moved. (The DRM debug is also
> > dropped). As for this code, I just wanted to get rid of the if (!ret)
> > block. It looks weird.
> >
> > Maybe I didn't get what you're asking though.
>
> I was wondering if this patch compiles because of the removal of the
> dev_priv local variable. (Or if the original was a shadow.)
> -Chris
Ah, of course. Yes, there was a shadowed dev_priv. I think it was
merge/rebase fail either by myself or Daniel when the original patches
were merged.
>
> --
> Chris Wilson, Intel Open Source Technology Centre
--
Ben Widawsky, Intel Open Source Technology Center
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