Hi zhengbin, Thank you for the patch! Yet something to improve: [auto build test ERROR on linuxtv-media/master] [cannot apply to v5.3-rc4 next-20190814] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/zhengbin/media-mc-device-c-fix-memleak-in-media_device_register_entity/20190816-191628 base: git://linuxtv.org/media_tree.git master config: sparc64-allmodconfig (attached as .config) compiler: sparc64-linux-gcc (GCC) 7.4.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=7.4.0 make.cross ARCH=sparc64 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> All error/warnings (new ones prefixed by >>): drivers/media//mc/mc-device.c: In function 'media_device_register_entity': >> drivers/media//mc/mc-device.c:635:4: error: implicit declaration of function '__media_device_unregister_entity'; did you mean 'media_device_unregister_entity'? [-Werror=implicit-function-declaration] __media_device_unregister_entity(entity); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ media_device_unregister_entity drivers/media//mc/mc-device.c: At top level: >> drivers/media//mc/mc-device.c:648:13: warning: conflicting types for '__media_device_unregister_entity' static void __media_device_unregister_entity(struct media_entity *entity) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> drivers/media//mc/mc-device.c:648:13: error: static declaration of '__media_device_unregister_entity' follows non-static declaration drivers/media//mc/mc-device.c:635:4: note: previous implicit declaration of '__media_device_unregister_entity' was here __media_device_unregister_entity(entity); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +635 drivers/media//mc/mc-device.c 577 578 /** 579 * media_device_register_entity - Register an entity with a media device 580 * @mdev: The media device 581 * @entity: The entity 582 */ 583 int __must_check media_device_register_entity(struct media_device *mdev, 584 struct media_entity *entity) 585 { 586 struct media_entity_notify *notify, *next; 587 unsigned int i; 588 int ret; 589 590 if (entity->function == MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN || 591 entity->function == MEDIA_ENT_F_UNKNOWN) 592 dev_warn(mdev->dev, 593 "Entity type for entity %s was not initialized!\n", 594 entity->name); 595 596 /* Warn if we apparently re-register an entity */ 597 WARN_ON(entity->graph_obj.mdev != NULL); 598 entity->graph_obj.mdev = mdev; 599 INIT_LIST_HEAD(&entity->links); 600 entity->num_links = 0; 601 entity->num_backlinks = 0; 602 603 ret = ida_alloc_min(&mdev->entity_internal_idx, 1, GFP_KERNEL); 604 if (ret < 0) 605 return ret; 606 entity->internal_idx = ret; 607 608 mutex_lock(&mdev->graph_mutex); 609 mdev->entity_internal_idx_max = 610 max(mdev->entity_internal_idx_max, entity->internal_idx); 611 612 /* Initialize media_gobj embedded at the entity */ 613 media_gobj_create(mdev, MEDIA_GRAPH_ENTITY, &entity->graph_obj); 614 615 /* Initialize objects at the pads */ 616 for (i = 0; i < entity->num_pads; i++) 617 media_gobj_create(mdev, MEDIA_GRAPH_PAD, 618 &entity->pads[i].graph_obj); 619 620 /* invoke entity_notify callbacks */ 621 list_for_each_entry_safe(notify, next, &mdev->entity_notify, list) 622 notify->notify(entity, notify->notify_data); 623 624 if (mdev->entity_internal_idx_max 625 >= mdev->pm_count_walk.ent_enum.idx_max) { 626 struct media_graph new = { .top = 0 }; 627 628 /* 629 * Initialise the new graph walk before cleaning up 630 * the old one in order not to spoil the graph walk 631 * object of the media device if graph walk init fails. 632 */ 633 ret = media_graph_walk_init(&new, mdev); 634 if (ret) { > 635 __media_device_unregister_entity(entity); 636 mutex_unlock(&mdev->graph_mutex); 637 return ret; 638 } 639 media_graph_walk_cleanup(&mdev->pm_count_walk); 640 mdev->pm_count_walk = new; 641 } 642 mutex_unlock(&mdev->graph_mutex); 643 644 return 0; 645 } 646 EXPORT_SYMBOL_GPL(media_device_register_entity); 647 > 648 static void __media_device_unregister_entity(struct media_entity *entity) 649 { 650 struct media_device *mdev = entity->graph_obj.mdev; 651 struct media_link *link, *tmp; 652 struct media_interface *intf; 653 unsigned int i; 654 655 ida_free(&mdev->entity_internal_idx, entity->internal_idx); 656 657 /* Remove all interface links pointing to this entity */ 658 list_for_each_entry(intf, &mdev->interfaces, graph_obj.list) { 659 list_for_each_entry_safe(link, tmp, &intf->links, list) { 660 if (link->entity == entity) 661 __media_remove_intf_link(link); 662 } 663 } 664 665 /* Remove all data links that belong to this entity */ 666 __media_entity_remove_links(entity); 667 668 /* Remove all pads that belong to this entity */ 669 for (i = 0; i < entity->num_pads; i++) 670 media_gobj_destroy(&entity->pads[i].graph_obj); 671 672 /* Remove the entity */ 673 media_gobj_destroy(&entity->graph_obj); 674 675 /* invoke entity_notify callbacks to handle entity removal?? */ 676 677 entity->graph_obj.mdev = NULL; 678 } 679 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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