[PATCH 4/4] drm/xe/bo: add some annotations in bo_put()

[Matthew Auld]

If the put() triggers bo destroy then there is at least one potential
sleeping lock. Also annotate bos_lock and ggtt lock.

Signed-off-by: Matthew Auld <matthew.auld at intel.com>
Cc: Himal Prasad Ghimiray <himal.prasad.ghimiray at intel.com>
Cc: Tejas Upadhyay <tejas.upadhyay at intel.com>
Cc: "Thomas Hellström" <thomas.hellstrom at linux.intel.com>
---
 drivers/gpu/drm/xe/xe_bo.c | 14 ++++++++++++++
 drivers/gpu/drm/xe/xe_bo.h |  6 +-----
 2 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_bo.c b/drivers/gpu/drm/xe/xe_bo.c
index 53948a965404..4176b302c38d 100644
--- a/drivers/gpu/drm/xe/xe_bo.c
+++ b/drivers/gpu/drm/xe/xe_bo.c
@@ -2320,6 +2320,20 @@ void xe_bo_put_commit(struct llist_head *deferred)
 		drm_gem_object_free(&bo->ttm.base.refcount);
 }
 
+void xe_bo_put(struct xe_bo *bo)
+{
+	might_sleep();
+	if (bo) {
+#ifdef CONFIG_PROC_FS
+		if (bo->client)
+			might_lock(&bo->client->bos_lock);
+#endif
+		if (bo->ggtt_node && bo->ggtt_node->ggtt)
+			might_lock(&bo->ggtt_node->ggtt->lock);
+		drm_gem_object_put(&bo->ttm.base);
+	}
+}
+
 /**
  * xe_bo_dumb_create - Create a dumb bo as backing for a fb
  * @file_priv: ...
diff --git a/drivers/gpu/drm/xe/xe_bo.h b/drivers/gpu/drm/xe/xe_bo.h
index dbfb3209615d..6e4be52306df 100644
--- a/drivers/gpu/drm/xe/xe_bo.h
+++ b/drivers/gpu/drm/xe/xe_bo.h
@@ -126,11 +126,7 @@ static inline struct xe_bo *xe_bo_get(struct xe_bo *bo)
 	return bo;
 }
 
-static inline void xe_bo_put(struct xe_bo *bo)
-{
-	if (bo)
-		drm_gem_object_put(&bo->ttm.base);
-}
+void xe_bo_put(struct xe_bo *bo);
 
 static inline void __xe_bo_unset_bulk_move(struct xe_bo *bo)
 {
-- 
2.46.0