[PATCH] drm/radeon: fix possible lack of synchronization btw ttm and other ring

[j.gli...@gmail.com]

From: Jerome Glisse <jgli...@redhat.com>

We need to sync with the GFX ring as ttm might have schedule bo move
on it and new command scheduled for other ring need to wait for bo
data to be in place.

Signed-off-by: Jerome Glisse <jglisse at redhat.com>
---
 drivers/gpu/drm/radeon/radeon_cs.c |   12 ++++++------
 include/drm/radeon_drm.h           |    1 -
 2 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_cs.c 
b/drivers/gpu/drm/radeon/radeon_cs.c
index 82f2e7b0..e5f8e17 100644
--- a/drivers/gpu/drm/radeon/radeon_cs.c
+++ b/drivers/gpu/drm/radeon/radeon_cs.c
@@ -122,15 +122,15 @@ static int radeon_cs_sync_rings(struct radeon_cs_parser 
*p)
        int i, r;

        for (i = 0; i < p->nrelocs; i++) {
+               struct radeon_fence *fence;
+
                if (!p->relocs[i].robj || !p->relocs[i].robj->tbo.sync_obj)
                        continue;

-               if (!(p->relocs[i].flags & RADEON_RELOC_DONT_SYNC)) {
-                       struct radeon_fence *fence = 
p->relocs[i].robj->tbo.sync_obj;
-                       if (fence->ring != p->ring && 
!radeon_fence_signaled(fence)) {
-                               sync_to_ring[fence->ring] = true;
-                               need_sync = true;
-                       }
+               fence = p->relocs[i].robj->tbo.sync_obj;
+               if (fence->ring != p->ring && !radeon_fence_signaled(fence)) {
+                       sync_to_ring[fence->ring] = true;
+                       need_sync = true;
                }
        }

diff --git a/include/drm/radeon_drm.h b/include/drm/radeon_drm.h
index 7c491b4..5805686 100644
--- a/include/drm/radeon_drm.h
+++ b/include/drm/radeon_drm.h
@@ -926,7 +926,6 @@ struct drm_radeon_cs_chunk {
 };

 /* drm_radeon_cs_reloc.flags */
-#define RADEON_RELOC_DONT_SYNC         0x01

 struct drm_radeon_cs_reloc {
        uint32_t                handle;
-- 
1.7.7.6