Hi Ikjoon, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on usb/usb-testing] [also build test WARNING on balbi-usb/testing/next peter.chen-usb/ci-for-usb-next v5.10-rc7 next-20201210] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Ikjoon-Jang/Release-allocated-pe... base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing config: xtensa-randconfig-r011-20201209 (attached as .config) compiler: xtensa-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/0day-ci/linux/commit/a99b1fe33b427dd2ca384c78d50b6d05f... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Ikjoon-Jang/Release-allocated-periodic-bandwidth-data-from-reset_bandwidth/20201210-185329 git checkout a99b1fe33b427dd2ca384c78d50b6d05fb04e56d # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=xtensa If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/usb/host/xhci-mtk-sch.c: In function 'xhci_mtk_add_ep_quirk': 606 | struct mu3h_sch_bw_info *sch_bw; | ^~~~~~ vim +/sch_bw +606 drivers/usb/host/xhci-mtk-sch.c 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 597 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 598 int xhci_mtk_add_ep_quirk(struct usb_hcd *hcd, struct usb_device *udev, 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 599 struct usb_host_endpoint *ep) 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 600 { 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 601 struct xhci_hcd_mtk *mtk = hcd_to_mtk(hcd); a99b1fe33b427dd Ikjoon Jang 2020-12-10 602 struct xhci_hcd *xhci = hcd_to_xhci(hcd); 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 603 struct xhci_ep_ctx *ep_ctx; 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 604 struct xhci_slot_ctx *slot_ctx; 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 605 struct xhci_virt_device *virt_dev; 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 @606 struct mu3h_sch_bw_info *sch_bw; 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 607 struct mu3h_sch_ep_info *sch_ep; 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 608 unsigned int ep_index; 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 609 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 610 virt_dev = xhci->devs[udev->slot_id]; 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 611 ep_index = xhci_get_endpoint_index(&ep->desc); 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 612 slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx); 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 613 ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, ep_index); 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 614 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 615 xhci_dbg(xhci, "%s() type:%d, speed:%d, mpkt:%d, dir:%d, ep:%p\n", 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 616 __func__, usb_endpoint_type(&ep->desc), udev->speed, 734d3ddd81902d8 Felipe Balbi 2016-09-28 617 usb_endpoint_maxp(&ep->desc), 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 618 usb_endpoint_dir_in(&ep->desc), ep); 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 619 b765a16a11fad6b Chunfeng Yun 2016-01-26 620 if (!need_bw_sch(ep, udev->speed, slot_ctx->tt_info & TT_SLOT)) { b765a16a11fad6b Chunfeng Yun 2016-01-26 621 /* b765a16a11fad6b Chunfeng Yun 2016-01-26 622 * set @bpkts to 1 if it is LS or FS periodic endpoint, and its b765a16a11fad6b Chunfeng Yun 2016-01-26 623 * device does not connected through an external HS hub b765a16a11fad6b Chunfeng Yun 2016-01-26 624 */ b765a16a11fad6b Chunfeng Yun 2016-01-26 625 if (usb_endpoint_xfer_int(&ep->desc) b765a16a11fad6b Chunfeng Yun 2016-01-26 626 || usb_endpoint_xfer_isoc(&ep->desc)) b765a16a11fad6b Chunfeng Yun 2016-01-26 627 ep_ctx->reserved[0] |= cpu_to_le32(EP_BPKTS(1)); b765a16a11fad6b Chunfeng Yun 2016-01-26 628 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 629 return 0; b765a16a11fad6b Chunfeng Yun 2016-01-26 630 } 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 631 06cc7c739674e71 Ikjoon Jang 2020-12-10 632 sch_bw = get_bw_info(mtk, udev, ep); 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 633 95b516c18621d16 Chunfeng Yun 2018-09-20 634 sch_ep = create_sch_ep(udev, ep, ep_ctx); 95b516c18621d16 Chunfeng Yun 2018-09-20 635 if (IS_ERR_OR_NULL(sch_ep)) 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 636 return -ENOMEM; 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 637 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 638 setup_sch_info(udev, ep_ctx, sch_ep); 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 639 a99b1fe33b427dd Ikjoon Jang 2020-12-10 640 list_add_tail(&sch_ep->endpoint, &mtk->bw_ep_list_new); 08e469de87a2534 Chunfeng Yun 2018-09-20 641 a99b1fe33b427dd Ikjoon Jang 2020-12-10 642 return 0; 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 643 } a99b1fe33b427dd Ikjoon Jang 2020-12-10 644 EXPORT_SYMBOL_GPL(xhci_mtk_add_ep_quirk); 0cbd4b34cda9dfd Chunfeng Yun 2015-11-24 645 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org