drm/gem-shmem: When drm_gem_object_init failed, should release object

when goto err_free, the object had init, so it should be release when fail.

Signed-off-by: ChunyouTang <tangchunyou@163.com>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20221119064131.364-1-tangchunyou@163.com

diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index b8db675..59a0bb5 100644 (file)
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -170,6 +170,20 @@ void drm_gem_private_object_init(struct drm_device *dev,
 EXPORT_SYMBOL(drm_gem_private_object_init);
 
 /**
+ * drm_gem_private_object_fini - Finalize a failed drm_gem_object
+ * @obj: drm_gem_object
+ *
+ * Uninitialize an already allocated GEM object when it initialized failed
+ */
+void drm_gem_private_object_fini(struct drm_gem_object *obj)
+{
+       WARN_ON(obj->dma_buf);
+
+       dma_resv_fini(&obj->_resv);
+}
+EXPORT_SYMBOL(drm_gem_private_object_fini);
+
+/**
  * drm_gem_object_handle_free - release resources bound to userspace handles
  * @obj: GEM object to clean up.
  *
@@ -930,12 +944,11 @@ drm_gem_release(struct drm_device *dev, struct drm_file *file_private)
 void
 drm_gem_object_release(struct drm_gem_object *obj)
 {
-       WARN_ON(obj->dma_buf);
-
        if (obj->filp)
                fput(obj->filp);
 
-       dma_resv_fini(&obj->_resv);
+       drm_gem_private_object_fini(obj);
+
        drm_gem_free_mmap_offset(obj);
        drm_gem_lru_remove(obj);
 }

diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c
index 35138f8..db73234 100644 (file)
--- a/drivers/gpu/drm/drm_gem_shmem_helper.c
+++ b/drivers/gpu/drm/drm_gem_shmem_helper.c
@@ -79,8 +79,10 @@ __drm_gem_shmem_create(struct drm_device *dev, size_t size, bool private)
        } else {
                ret = drm_gem_object_init(dev, obj, size);
        }
-       if (ret)
+       if (ret) {
+               drm_gem_private_object_fini(obj);
                goto err_free;
+       }
 
        ret = drm_gem_create_mmap_offset(obj);
        if (ret)

diff --git a/include/drm/drm_gem.h b/include/drm/drm_gem.h
index a17c2f9..772a4ad 100644 (file)
--- a/include/drm/drm_gem.h
+++ b/include/drm/drm_gem.h
@@ -405,6 +405,7 @@ int drm_gem_object_init(struct drm_device *dev,
                        struct drm_gem_object *obj, size_t size);
 void drm_gem_private_object_init(struct drm_device *dev,
                                 struct drm_gem_object *obj, size_t size);
+void drm_gem_private_object_fini(struct drm_gem_object *obj);
 void drm_gem_vm_open(struct vm_area_struct *vma);
 void drm_gem_vm_close(struct vm_area_struct *vma);
 int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,