diff options
| -rw-r--r-- | drivers/gpu/drm/drm_gem_shmem_helper.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c index afe9668f1750..06cee8e97d27 100644 --- a/drivers/gpu/drm/drm_gem_shmem_helper.c +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c @@ -170,6 +170,8 @@ int drm_gem_shmem_get_pages(struct drm_gem_shmem_object *shmem) { int ret; + WARN_ON(shmem->base.import_attach); + ret = mutex_lock_interruptible(&shmem->pages_lock); if (ret) return ret; @@ -225,6 +227,8 @@ int drm_gem_shmem_pin(struct drm_gem_object *obj) { struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj); + WARN_ON(shmem->base.import_attach); + return drm_gem_shmem_get_pages(shmem); } EXPORT_SYMBOL(drm_gem_shmem_pin); @@ -240,6 +244,8 @@ void drm_gem_shmem_unpin(struct drm_gem_object *obj) { struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj); + WARN_ON(shmem->base.import_attach); + drm_gem_shmem_put_pages(shmem); } EXPORT_SYMBOL(drm_gem_shmem_unpin); @@ -510,6 +516,8 @@ static void drm_gem_shmem_vm_open(struct vm_area_struct *vma) struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj); int ret; + WARN_ON(shmem->base.import_attach); + ret = drm_gem_shmem_get_pages(shmem); WARN_ON_ONCE(ret != 0); @@ -611,6 +619,8 @@ struct sg_table *drm_gem_shmem_get_sg_table(struct drm_gem_object *obj) { struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj); + WARN_ON(shmem->base.import_attach); + return drm_prime_pages_to_sg(shmem->pages, obj->size >> PAGE_SHIFT); } EXPORT_SYMBOL_GPL(drm_gem_shmem_get_sg_table); |