Hi Wei, I love your patch! Perhaps something to improve: [auto build test WARNING on next-20200914] [cannot apply to char-misc/char-misc-testing v5.9-rc5 v5.9-rc4 v5.9-rc3 v5.9-rc5] [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/Wei-Xu/misc-hisi_hikey_usb-fix-t... base: f965d3ec86fa89285db0fbb983da76ba9c398efa config: x86_64-randconfig-c004-20200915 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; coccinelle warnings: (new ones prefixed by >>) Please review and possibly fold the followup patch. --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org