Avoid pinning the module when exporting a GEM object as a dmabuf. This makes it possible to unload drivers that has in-kernel clients using it. The client is removed on drm_dev_unregister() so no need to pin the driver.
Signed-off-by: Noralf Trønnes noralf@tronnes.org --- drivers/gpu/drm/drm_prime.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+)
diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c index e6052ab2bec4..f9dbe3b9db20 100644 --- a/drivers/gpu/drm/drm_prime.c +++ b/drivers/gpu/drm/drm_prime.c @@ -567,6 +567,30 @@ struct dma_buf *drm_gem_prime_export(struct drm_device *dev, .flags = flags, .priv = obj, }; + bool is_internal = false; + struct drm_file *file; + + mutex_lock(&dev->filelist_mutex); + list_for_each_entry(file, &dev->filelist_internal, lhead) { + struct drm_gem_object *iter; + int id; + + spin_lock(&file->table_lock); + idr_for_each_entry(&file->object_idr, iter, id) { + if (iter == obj) { + is_internal = true; + break; + } + } + spin_unlock(&file->table_lock); + + if (is_internal) + break; + } + mutex_unlock(&dev->filelist_mutex); + + if (is_internal) + exp_info.owner = NULL;
if (dev->driver->gem_prime_res_obj) exp_info.resv = dev->driver->gem_prime_res_obj(obj);