[PATCH 02/10] drm/ttm: remove NULL checks when calling ttm_tt_destroy

[Christian König]

From: Christian König <christian.koe...@amd.com>

The function is a no-op with a NULL pointer.

Signed-off-by: Christian König <christian.koenig at amd.com>
---
 drivers/gpu/drm/ttm/ttm_bo.c      | 11 ++++-------
 drivers/gpu/drm/ttm/ttm_bo_util.c |  5 ++---
 drivers/gpu/drm/ttm/ttm_tt.c      |  2 +-
 3 files changed, 7 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 4216b31..43a2955 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -147,8 +147,7 @@ static void ttm_bo_release_list(struct kref *list_kref)
        BUG_ON(!list_empty(&bo->lru));
        BUG_ON(!list_empty(&bo->ddestroy));

-       if (bo->ttm)
-               ttm_tt_destroy(bo->ttm);
+       ttm_tt_destroy(bo->ttm);
        atomic_dec(&bo->glob->bo_count);
        if (bo->resv == &bo->ttm_resv)
                reservation_object_fini(&bo->ttm_resv);
@@ -396,7 +395,7 @@ moved:

 out_err:
        new_man = &bdev->man[bo->mem.mem_type];
-       if ((new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && bo->ttm) {
+       if (new_man->flags & TTM_MEMTYPE_FLAG_FIXED) {
                ttm_tt_destroy(bo->ttm);
                bo->ttm = NULL;
        }
@@ -417,10 +416,8 @@ static void ttm_bo_cleanup_memtype_use(struct 
ttm_buffer_object *bo)
        if (bo->bdev->driver->move_notify)
                bo->bdev->driver->move_notify(bo, NULL);

-       if (bo->ttm) {
-               ttm_tt_destroy(bo->ttm);
-               bo->ttm = NULL;
-       }
+       ttm_tt_destroy(bo->ttm);
+       bo->ttm = NULL;
        ttm_bo_mem_put(bo, &bo->mem);

        ww_mutex_unlock (&bo->resv->lock);
diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c 
b/drivers/gpu/drm/ttm/ttm_bo_util.c
index 4194b7e..0f4bcb0 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_util.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
@@ -400,7 +400,7 @@ out2:
        *old_mem = *new_mem;
        new_mem->mm_node = NULL;

-       if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && (ttm != NULL)) {
+       if (man->flags & TTM_MEMTYPE_FLAG_FIXED) {
                ttm_tt_destroy(ttm);
                bo->ttm = NULL;
        }
@@ -647,8 +647,7 @@ int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo,
                if (ret)
                        return ret;

-               if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) &&
-                   (bo->ttm != NULL)) {
+               if (man->flags & TTM_MEMTYPE_FLAG_FIXED) {
                        ttm_tt_destroy(bo->ttm);
                        bo->ttm = NULL;
                }
diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
index 79f6323..d28d4333 100644
--- a/drivers/gpu/drm/ttm/ttm_tt.c
+++ b/drivers/gpu/drm/ttm/ttm_tt.c
@@ -168,7 +168,7 @@ void ttm_tt_destroy(struct ttm_tt *ttm)
 {
        int ret;

-       if (unlikely(ttm == NULL))
+       if (ttm == NULL)
                return;

        if (ttm->state == tt_bound) {
-- 
2.5.0