Hi John, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on mac80211/master] [also build test WARNING on ath6kl/ath-next v5.7-rc3 next-20200430] [cannot apply to mac80211-next/master] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/John-Crispin/nl80211-add-support... base: https://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211.git master reproduce: # apt-get install sparse # sparse version: v0.6.1-191-gc51a0382-dirty make ARCH=x86_64 allmodconfig make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) net/wireless/nl80211.c:4442:47: sparse: sparse: incorrect type in return expression (different base types) @@ expected unsigned short @@ got restricted __le16 conunsigned short @@ net/wireless/nl80211.c:4442:47: sparse: expected unsigned short vim +4440 net/wireless/nl80211.c 4431 4432 static u16 he_get_txmcsmap(struct genl_info *info, 4433 const struct ieee80211_sta_he_cap *he_cap) 4434 { 4435 struct net_device *dev = info->user_ptr[1]; 4436 struct wireless_dev *wdev = dev->ieee80211_ptr; 4437 4438 switch (wdev->chandef.width) { 4439 case NL80211_CHAN_WIDTH_80P80: 4441 case NL80211_CHAN_WIDTH_160: 4443 default: 4444 break; 4445 } 4446 return le16_to_cpu(he_cap->he_mcs_nss_supp.tx_mcs_80); 4447 } 4448 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org