[PATCH 1/2] drm/ttm: Avoid using the ttm_mem_type_manager::put_locked function

[Thomas Hellstrom]

Release the lru spinlock early.

Signed-off-by: Thomas Hellstrom <thellstrom at vmware.com>
---
 drivers/gpu/drm/ttm/ttm_bo.c         |   30 +++++-------------------------
 drivers/gpu/drm/ttm/ttm_bo_manager.c |   10 ----------
 include/drm/ttm/ttm_bo_driver.h      |    2 --
 3 files changed, 5 insertions(+), 37 deletions(-)

diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index fd8344d..7497b79 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -439,36 +439,25 @@ out_err:
 }
 
 /**
- * Call bo::reserved and with the lru lock held.
+ * Call bo::reserved.
  * Will release GPU memory type usage on destruction.
- * This is the place to put in driver specific hooks.
- * Will release the bo::reserved lock and the
- * lru lock on exit.
+ * This is the place to put in driver specific hooks to release
+ * driver private resources.
+ * Will release the bo::reserved lock.
  */
 
 static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object *bo)
 {
-	struct ttm_bo_global *glob = bo->glob;
-
 	if (bo->ttm) {
-
-		/**
-		 * Release the lru_lock, since we don't want to have
-		 * an atomic requirement on ttm_tt[unbind|destroy].
-		 */
-
-		spin_unlock(&glob->lru_lock);
 		ttm_tt_unbind(bo->ttm);
 		ttm_tt_destroy(bo->ttm);
 		bo->ttm = NULL;
-		spin_lock(&glob->lru_lock);
 	}
 
-	ttm_bo_mem_put_locked(bo, &bo->mem);
+	ttm_bo_mem_put(bo, &bo->mem);
 
 	atomic_set(&bo->reserved, 0);
 	wake_up_all(&bo->event_queue);
-	spin_unlock(&glob->lru_lock);
 }
 
 
@@ -788,15 +777,6 @@ void ttm_bo_mem_put(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem)
 }
 EXPORT_SYMBOL(ttm_bo_mem_put);
 
-void ttm_bo_mem_put_locked(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem)
-{
-	struct ttm_mem_type_manager *man = &bo->bdev->man[mem->mem_type];
-
-	if (mem->mm_node)
-		(*man->func->put_node_locked)(man, mem);
-}
-EXPORT_SYMBOL(ttm_bo_mem_put_locked);
-
 /**
  * Repeatedly evict memory from the LRU for @mem_type until we create enough
  * space, or we've evicted everything and there isn't enough space.
diff --git a/drivers/gpu/drm/ttm/ttm_bo_manager.c b/drivers/gpu/drm/ttm/ttm_bo_manager.c
index 35c97b2..7410c19 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_manager.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_manager.c
@@ -90,15 +90,6 @@ static void ttm_bo_man_put_node(struct ttm_mem_type_manager *man,
 	}
 }
 
-static void ttm_bo_man_put_node_locked(struct ttm_mem_type_manager *man,
-				       struct ttm_mem_reg *mem)
-{
-	if (mem->mm_node) {
-		drm_mm_put_block(mem->mm_node);
-		mem->mm_node = NULL;
-	}
-}
-
 static int ttm_bo_man_init(struct ttm_mem_type_manager *man,
 			   unsigned long p_size)
 {
@@ -152,7 +143,6 @@ const struct ttm_mem_type_manager_func ttm_bo_manager_func = {
 	ttm_bo_man_takedown,
 	ttm_bo_man_get_node,
 	ttm_bo_man_put_node,
-	ttm_bo_man_put_node_locked,
 	ttm_bo_man_debug
 };
 EXPORT_SYMBOL(ttm_bo_manager_func);
diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
index d0ff529..d01b4dd 100644
--- a/include/drm/ttm/ttm_bo_driver.h
+++ b/include/drm/ttm/ttm_bo_driver.h
@@ -214,8 +214,6 @@ struct ttm_mem_type_manager_func {
 			 struct ttm_mem_reg *mem);
 	void (*put_node)(struct ttm_mem_type_manager *man,
 			 struct ttm_mem_reg *mem);
-	void (*put_node_locked)(struct ttm_mem_type_manager *man,
-				struct ttm_mem_reg *mem);
 	void (*debug)(struct ttm_mem_type_manager *man, const char *prefix);
 };
 
-- 
1.6.2.5