drm/i915/execbuffer: Clear domains before beginning reloc processing

After reordering the sequence of relocating objects, commit 6fe4f1404,
we can no longer rely on seeing all reloc targets prior to performing
the relocation. As a result we were ignoring the need to flush objects
from the render cache and invalidate the sampler caches, resulting in
rendering glitches. So we need to clear the relocation domains earlier.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Tested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 3 insertions, 4 deletions

diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index 6b34e98a1270..8db88e34ef7b 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -464,8 +464,6 @@ i915_gem_execbuffer_relocate(struct drm_device *dev,
         int ret;
 
         list_for_each_entry(obj, objects, exec_list) {
-                obj->base.pending_read_domains = 0;
-                obj->base.pending_write_domain = 0;
                 ret = i915_gem_execbuffer_relocate_object(obj, eb);
                 if (ret)
                         return ret;
@@ -505,6 +503,9 @@ i915_gem_execbuffer_reserve(struct intel_ring_buffer *ring,
                         list_move(&obj->exec_list, &ordered_objects);
                 else
                         list_move_tail(&obj->exec_list, &ordered_objects);
+
+                obj->base.pending_read_domains = 0;
+                obj->base.pending_write_domain = 0;
         }
         list_splice(&ordered_objects, objects);
 
@@ -712,8 +713,6 @@ i915_gem_execbuffer_relocate_slow(struct drm_device *dev,
 
         list_for_each_entry(obj, objects, exec_list) {
                 int offset = obj->exec_entry - exec;
-                obj->base.pending_read_domains = 0;
-                obj->base.pending_write_domain = 0;
                 ret = i915_gem_execbuffer_relocate_object_slow(obj, eb,
                                                                reloc + reloc_offset[offset]);
                 if (ret)