Merge tag 'drm-intel-fixes-2021-07-15' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

Two regression fixes targeting stable:
- Fix -EDEADLK handling regression (Ville)
- Drop the page table optimisation (Matt)

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/YPA8y1DSCp2EbtpC@intel.com

Author: airlied

drivers/gpu/drm/i915/gt/gen8_ppgtt.c

@@ -303,10 +303,7 @@ static void __gen8_ppgtt_alloc(struct i915_address_space * const vm,
 			__i915_gem_object_pin_pages(pt->base);
 			i915_gem_object_make_unshrinkable(pt->base);
 
-			if (lvl ||
-			    gen8_pt_count(*start, end) < I915_PDES ||
-			    intel_vgpu_active(vm->i915))
-				fill_px(pt, vm->scratch[lvl]->encode);
+			fill_px(pt, vm->scratch[lvl]->encode);
 
 			spin_lock(&pd->lock);
 			if (likely(!pd->entry[idx])) {

drivers/gpu/drm/i915/gt/intel_ggtt_fencing.c

@@ -348,7 +348,7 @@ static struct i915_fence_reg *fence_find(struct i915_ggtt *ggtt)
 	if (intel_has_pending_fb_unpin(ggtt->vm.i915))
 		return ERR_PTR(-EAGAIN);
 
-	return ERR_PTR(-EDEADLK);
+	return ERR_PTR(-ENOBUFS);
 }
 
 int __i915_vma_pin_fence(struct i915_vma *vma)