Hi Ingo, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on balbi-usb/testing/next] [also build test WARNING on usb/usb-testing peter.chen-usb/ci-for-usb-next linus/master v5.10-rc3 next-20201113] [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/Ingo-Rohloff/usb-gadget-User-spa... base: https://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git testing/next config: x86_64-randconfig-s032-20201111 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-107-gaf3512a6-dirty # https://github.com/0day-ci/linux/commit/9f07add950a345cd51a7d56e685577b93... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Ingo-Rohloff/usb-gadget-User-space-URBs-for-FunctionFS/20201112-011456 git checkout 9f07add950a345cd51a7d56e685577b93da8a5f0 # 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 >>)" drivers/usb/gadget/function/f_fs.c:3336:32: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned short [usertype] wMaxPacketSize @@ got restricted __le16 [usertype] wMaxPacketSize @@ drivers/usb/gadget/function/f_fs.c:3336:32: sparse: expected unsigned short [usertype] wMaxPacketSize drivers/usb/gadget/function/f_fs.c:3336:32: sparse: got restricted __le16 [usertype] wMaxPacketSize drivers/usb/gadget/function/f_fs.c:3361:36: sparse: sparse: incorrect type in assignment (different base types) @@ expected restricted __le16 [usertype] wMaxPacketSize @@ got unsigned short [usertype] wMaxPacketSize @@ drivers/usb/gadget/function/f_fs.c:3361:36: sparse: expected restricted __le16 [usertype] wMaxPacketSize drivers/usb/gadget/function/f_fs.c:3361:36: sparse: got unsigned short [usertype] wMaxPacketSize 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