Hi Henning, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on pavel-linux-leds/for-next] [also build test WARNING on tip/master linux/master linus/master v5.12-rc3 next-20210315] [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/Henning-Schild/add-device-driver... base: git://git.kernel.org/pub/scm/linux/kernel/git/pavel/linux-leds.git for-next config: x86_64-randconfig-s022-20210315 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-277-gc089cd2d-dirty # https://github.com/0day-ci/linux/commit/7b3ce3514b5f314b15ab6e2898104fa3e... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Henning-Schild/add-device-drivers-for-Siemens-Industrial-PCs/20210315-181441 git checkout 7b3ce3514b5f314b15ab6e2898104fa3e8e76d59 # 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/platform/x86/pmc_atom.c: note: in included file: vim +50 include/linux/platform_data/x86/simatic-ipc.h 051f5729fd6fb4 Henning Schild 2021-03-15 30 051f5729fd6fb4 Henning Schild 2021-03-15 31 static inline u32 simatic_ipc_get_station_id(u8 *data, int max_len) 051f5729fd6fb4 Henning Schild 2021-03-15 32 { 051f5729fd6fb4 Henning Schild 2021-03-15 33 u32 station_id = SIMATIC_IPC_INVALID_STATION_ID; 051f5729fd6fb4 Henning Schild 2021-03-15 34 int i; 051f5729fd6fb4 Henning Schild 2021-03-15 35 struct { 051f5729fd6fb4 Henning Schild 2021-03-15 36 u8 type; /* type (0xff = binary) */ 051f5729fd6fb4 Henning Schild 2021-03-15 37 u8 len; /* len of data entry */ 051f5729fd6fb4 Henning Schild 2021-03-15 38 u8 reserved[3]; 051f5729fd6fb4 Henning Schild 2021-03-15 39 u32 station_id; /* station id (LE) */ 051f5729fd6fb4 Henning Schild 2021-03-15 40 } __packed 051f5729fd6fb4 Henning Schild 2021-03-15 41 *data_entry = (void *)data + sizeof(struct dmi_header); 051f5729fd6fb4 Henning Schild 2021-03-15 42 051f5729fd6fb4 Henning Schild 2021-03-15 43 /* find 4th entry in OEM data */ 051f5729fd6fb4 Henning Schild 2021-03-15 44 for (i = 0; i < 3; i++) 051f5729fd6fb4 Henning Schild 2021-03-15 45 data_entry = (void *)((u8 *)(data_entry) + data_entry->len); 051f5729fd6fb4 Henning Schild 2021-03-15 46 051f5729fd6fb4 Henning Schild 2021-03-15 47 /* decode station id */ 051f5729fd6fb4 Henning Schild 2021-03-15 48 if (data_entry && (u8 *)data_entry < data + max_len && 051f5729fd6fb4 Henning Schild 2021-03-15 49 data_entry->type == 0xff && data_entry->len == 9) 051f5729fd6fb4 Henning Schild 2021-03-15 @50 station_id = le32_to_cpu(data_entry->station_id); 051f5729fd6fb4 Henning Schild 2021-03-15 51 051f5729fd6fb4 Henning Schild 2021-03-15 52 return station_id; 051f5729fd6fb4 Henning Schild 2021-03-15 53 } 051f5729fd6fb4 Henning Schild 2021-03-15 54 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org