Hi Thomas, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on mac80211-next/master] [cannot apply to mac80211/master v5.9-rc6 next-20200921] [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/Thomas-Pedersen/add-support-for-... base: https://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next.git master config: x86_64-randconfig-s022-20200920 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.2-201-g24bdaac6-dirty # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) -- # https://github.com/0day-ci/linux/commit/3fc1b6bebf4f30e15318e12b83607fb20... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Thomas-Pedersen/add-support-for-S1G-association/20200909-122015 git checkout 3fc1b6bebf4f30e15318e12b83607fb202bf7528 vim +4412 net/mac80211/util.c 4394 4395 __le16 ieee80211_encode_usf(int listen_interval) 4396 { 4397 u16 ui, usf = 0; 4398 4399 /* find greatest USF */ 4400 while (usf < IEEE80211_MAX_USF) { 4401 if (listen_interval % listen_int_usf[usf + 1]) 4402 break; 4403 usf += 1; 4404 } 4405 ui = listen_interval / listen_int_usf[usf]; 4406 4407 /* error if there is a remainder. Should've been checked by user */ 4408 WARN_ON_ONCE(ui > IEEE80211_MAX_UI); 4409 listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) | 4410 FIELD_PREP(LISTEN_INT_UI, ui); 4411 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org