[PATCH 2/5] drm/exec: don't immediately add the prelocked obj

["Christian König" <ckoenig.leichtzumerken@xxxxxxxxx>]

Some contended objects might never be locked again in the case of eviction
handling for example.

Make sure that those doesn't show up in the list of locked objects until
they are explicitely mentioned.

Signed-off-by: Christian König <christian.koenig@xxxxxxx>
---
 drivers/gpu/drm/drm_exec.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/drm_exec.c b/drivers/gpu/drm/drm_exec.c
index 2da094bdf8a4..220df336fbd9 100644
--- a/drivers/gpu/drm/drm_exec.c
+++ b/drivers/gpu/drm/drm_exec.c
@@ -61,8 +61,11 @@ static void drm_exec_unlock_all(struct drm_exec *exec)
 		drm_gem_object_put(obj);
 	}
 
-	drm_gem_object_put(exec->prelocked);
-	exec->prelocked = NULL;
+	if (exec->prelocked) {
+		dma_resv_unlock(exec->prelocked->resv);
+		drm_gem_object_put(exec->prelocked);
+		exec->prelocked = NULL;
+	}
 }
 
 /**
@@ -179,16 +182,9 @@ static int drm_exec_lock_contended(struct drm_exec *exec)
 		dma_resv_lock_slow(obj->resv, &exec->ticket);
 	}
 
-	ret = drm_exec_obj_locked(exec, obj);
-	if (unlikely(ret))
-		goto error_unlock;
-
 	exec->prelocked = obj;
 	return 0;
 
-error_unlock:
-	dma_resv_unlock(obj->resv);
-
 error_dropref:
 	drm_gem_object_put(obj);
 	return ret;
@@ -214,6 +210,10 @@ int drm_exec_lock_obj(struct drm_exec *exec, struct drm_gem_object *obj)
 		return ret;
 
 	if (exec->prelocked == obj) {
+		ret = drm_exec_obj_locked(exec, obj);
+		if (unlikely(ret))
+			return ret;
+
 		drm_gem_object_put(exec->prelocked);
 		exec->prelocked = NULL;
 		return 0;
-- 
2.34.1