drm/i915: fixup pd vs pt confusion in gen6 ppgtt code

The index variable points at a page table, not a page directory or a
pde. Ben Widawsky fix this up correctly in his ppgtt cleanup, but I've
botched the job and copy&pasted the old confusion from the original
gen6 ppgtt code in

commit def886c3768d24c4e0aa56ff98b5a468c2b5c9bf
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Thu Jan 24 14:44:56 2013 -0800

    drm/i915: vfuncs for ppgtt

Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 414dee4..4cbae7b 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -83,7 +83,7 @@ static void gen6_ppgtt_clear_range(struct i915_hw_ppgtt *ppgtt,
 {
        gtt_pte_t *pt_vaddr;
        gtt_pte_t scratch_pte;
-       unsigned act_pd = first_entry / I915_PPGTT_PT_ENTRIES;
+       unsigned act_pt = first_entry / I915_PPGTT_PT_ENTRIES;
        unsigned first_pte = first_entry % I915_PPGTT_PT_ENTRIES;
        unsigned last_pte, i;
 
@@ -96,7 +96,7 @@ static void gen6_ppgtt_clear_range(struct i915_hw_ppgtt *ppgtt,
                if (last_pte > I915_PPGTT_PT_ENTRIES)
                        last_pte = I915_PPGTT_PT_ENTRIES;
 
-               pt_vaddr = kmap_atomic(ppgtt->pt_pages[act_pd]);
+               pt_vaddr = kmap_atomic(ppgtt->pt_pages[act_pt]);
 
                for (i = first_pte; i < last_pte; i++)
                        pt_vaddr[i] = scratch_pte;
@@ -105,7 +105,7 @@ static void gen6_ppgtt_clear_range(struct i915_hw_ppgtt *ppgtt,
 
                num_entries -= last_pte - first_pte;
                first_pte = 0;
-               act_pd++;
+               act_pt++;
        }
 }
 
@@ -115,11 +115,11 @@ static void gen6_ppgtt_insert_entries(struct i915_hw_ppgtt *ppgtt,
                                      enum i915_cache_level cache_level)
 {
        gtt_pte_t *pt_vaddr;
-       unsigned act_pd = first_entry / I915_PPGTT_PT_ENTRIES;
+       unsigned act_pt = first_entry / I915_PPGTT_PT_ENTRIES;
        unsigned act_pte = first_entry % I915_PPGTT_PT_ENTRIES;
        struct sg_page_iter sg_iter;
 
-       pt_vaddr = kmap_atomic(ppgtt->pt_pages[act_pd]);
+       pt_vaddr = kmap_atomic(ppgtt->pt_pages[act_pt]);
        for_each_sg_page(pages->sgl, &sg_iter, pages->nents, 0) {
                dma_addr_t page_addr;
 
@@ -129,8 +129,8 @@ static void gen6_ppgtt_insert_entries(struct i915_hw_ppgtt *ppgtt,
                                                    cache_level);
                if (++act_pte == I915_PPGTT_PT_ENTRIES) {
                        kunmap_atomic(pt_vaddr);
-                       act_pd++;
-                       pt_vaddr = kmap_atomic(ppgtt->pt_pages[act_pd]);
+                       act_pt++;
+                       pt_vaddr = kmap_atomic(ppgtt->pt_pages[act_pt]);
                        act_pte = 0;
 
                }