Hi Brad, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on linuxtv-media/master] [also build test WARNING on v5.7 next-20200612] [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/Brad-Love/MaxLinear-mxl692-demod... base: git://linuxtv.org/media_tree.git master config: i386-randconfig-s002-20200612 (attached as .config) compiler: gcc-9 (Debian 9.3.0-13) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.1-250-g42323db3-dirty # save the attached .config to linux build tree make W=1 C=1 ARCH=i386 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' 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/media/dvb-frontends/mxl692.c:227:27: sparse: sparse: invalid assignment: += drivers/media/dvb-frontends/mxl692.c:227:27: sparse: left side has type unsigned int drivers/media/dvb-frontends/mxl692.c:227:27: sparse: right side has type restricted __be32 vim +223 drivers/media/dvb-frontends/mxl692.c 217 218 static u32 mxl692_checksum(u8 *buffer, u32 size) 219 { 220 u32 ix, remainder = 0, cur_cksum = 0; 221 222 for (ix = 0; ix < size / 4; ix++) 224 (ix * sizeof(u32)))); 225 remainder = size % 4; 226 if (remainder > 0) 227 cur_cksum += cpu_to_be32(*((u32 *)&buffer[size - remainder])); 228 229 cur_cksum ^= 0xDEADBEEF; 230 232 } 233 234 static int mxl692_validate_fw_header(const u8 *buffer, u32 buf_len) 235 { 236 int status = 0; 237 u32 ix, temp = 0; 238 u32 *local_buf = NULL; 239 240 if (buffer[0] != 0x4D || buffer[1] != 0x31 || 241 buffer[2] != 0x10 || buffer[3] != 0x02 || 242 buffer[4] != 0x40 || buffer[5] != 0x00 || 243 buffer[6] != 0x00 || buffer[7] != 0x80) { 244 status = -EINVAL; 245 goto err_finish; 246 } 247 248 local_buf = (u32 *)(buffer + 8); 250 251 if ((buf_len - 16) != (temp >> 8)) { 252 status = -EINVAL; 253 goto err_finish; 254 } 255 256 temp = 0; 257 for (ix = 16; ix < buf_len; ix++) 258 temp += buffer[ix]; 259 260 if ((u8)temp != buffer[11]) 261 status = -EINVAL; 262 err_finish: 263 if (status) 264 pr_err("%s failed! %d\n", __func__, status); 265 return status; 266 } 267 268 static int mxl692_write_fw_block(struct mxl692_dev *dev, const u8 *buffer, 269 u32 buf_len, u32 *index) 270 { 271 int status = 0; 272 u32 ix = 0, total_len = 0, addr = 0, chunk_len = 0, prevchunk_len = 0; 273 u8 local_buf[MXL_EAGLE_MAX_I2C_PACKET_SIZE] = {}, *plocal_buf = NULL; 274 int payload_max = MXL_EAGLE_MAX_I2C_PACKET_SIZE - MXL_EAGLE_I2C_MHEADER_SIZE; 275 276 ix = *index; 277 278 if (buffer[ix] == 0x53) { 279 total_len = buffer[ix + 1] << 16 | buffer[ix + 2] << 8 | buffer[ix + 3]; 280 total_len = (total_len + 3) & ~3; 281 addr = buffer[ix + 4] << 24 | buffer[ix + 5] << 16 | 282 buffer[ix + 6] << 8 | buffer[ix + 7]; 283 ix += MXL_EAGLE_FW_SEGMENT_HEADER_SIZE; 284 285 while ((total_len > 0) && (status == 0)) { 286 plocal_buf = local_buf; 287 chunk_len = (total_len < payload_max) ? 288 total_len : payload_max; 289 290 *plocal_buf++ = 0xFC; 291 *plocal_buf++ = chunk_len + sizeof(u32); 292 294 plocal_buf += sizeof(u32); 295 296 memcpy(plocal_buf, &buffer[ix], chunk_len); 297 convert_endian(chunk_len, plocal_buf); 298 299 if (mxl692_i2c_write(dev, local_buf, 300 (chunk_len + MXL_EAGLE_I2C_MHEADER_SIZE)) < 0) { 301 status = -EREMOTEIO; 302 break; 303 } 304 305 prevchunk_len += chunk_len; 306 total_len -= chunk_len; 307 ix += chunk_len; 308 } 309 *index = ix; 310 } else { 311 status = -EINVAL; 312 } 313 314 if (status) 315 dev_err(&dev->i2c_client->dev, "err %d\n", status); 316 317 return status; 318 } 319 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org