Hi Souradeep, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on robh/for-next] [also build test WARNING on linus/master v5.11 next-20210216] [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/Souradeep-Chowdhury/Add-driver-s... base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next config: arc-allyesconfig (attached as .config) compiler: arceb-elf-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/0day-ci/linux/commit/98f7664a4e41764c0d2111d6b17905d97... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Souradeep-Chowdhury/Add-driver-support-for-Data-Capture-and-Compare-Engine-DCC-for-SM8150/20210217-145428 git checkout 98f7664a4e41764c0d2111d6b17905d974aad65d # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/soc/qcom/dcc.c: In function '_dcc_ll_cfg_default': 360 | if (ret) | ^~ drivers/soc/qcom/dcc.c:362:5: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if' 362 | cfg->sram_offset += 4; | ^~~ At top level: drivers/soc/qcom/dcc.c:787:12: warning: 'dcc_add_write' defined but not used [-Wunused-function] 787 | static int dcc_add_write(struct dcc_drvdata *drvdata, unsigned int addr, | ^~~~~~~~~~~~~ drivers/soc/qcom/dcc.c:750:12: warning: 'dcc_rd_mod_wr_add' defined but not used [-Wunused-function] 750 | static int dcc_rd_mod_wr_add(struct dcc_drvdata *drvdata, unsigned int mask, | ^~~~~~~~~~~~~~~~~ drivers/soc/qcom/dcc.c:733:12: warning: 'dcc_add_loop' defined but not used [-Wunused-function] 733 | static int dcc_add_loop(struct dcc_drvdata *drvdata, unsigned long loop_cnt) | ^~~~~~~~~~~~ drivers/soc/qcom/dcc.c:631:12: warning: 'dcc_config_add' defined but not used [-Wunused-function] 631 | static int dcc_config_add(struct dcc_drvdata *drvdata, unsigned int addr, | ^~~~~~~~~~~~~~ drivers/soc/qcom/dcc.c:574:12: warning: 'dcc_enable' defined but not used [-Wunused-function] 574 | static int dcc_enable(struct dcc_drvdata *drvdata) | ^~~~~~~~~~ vim +/if +360 drivers/soc/qcom/dcc.c 338 339 static int _dcc_ll_cfg_default(struct dcc_drvdata *drvdata, 340 struct dcc_config_entry *entry, struct dcc_cfg_attr *cfg, u32 *pos, u32 *total_len) 341 { 342 int ret = 0; 343 u32 off; 344 345 cfg->addr = (entry->base >> 4) & BM(0, 27); 346 347 if (entry->apb_bus) 348 cfg->addr |= DCC_ADDR_DESCRIPTOR | DCC_READ_IND | DCC_APB_IND; 349 else 350 cfg->addr |= DCC_ADDR_DESCRIPTOR | DCC_READ_IND | DCC_AHB_IND; 351 352 off = entry->offset/4; 353 354 *total_len += entry->len * 4; 355 356 if (!cfg->prev_addr || cfg->prev_addr != cfg->addr || cfg->prev_off > off) { 357 /* Check if we need to write prev link entry */ 358 if (cfg->link) { 359 ret = dcc_sram_writel(drvdata, cfg->link, cfg->sram_offset); 361 return ret; 362 cfg->sram_offset += 4; 363 } 364 dev_dbg(drvdata->dev, "DCC: sram address 0x%x\n", cfg->sram_offset); 365 366 /* Write address */ 367 ret = dcc_sram_writel(drvdata, cfg->addr, cfg->sram_offset); 368 369 if (ret) 370 return ret; 371 372 cfg->sram_offset += 4; 373 374 /* Reset link and prev_off */ 375 cfg->link = 0; 376 cfg->prev_off = 0; 377 } 378 379 if ((off - cfg->prev_off) > 0xFF || entry->len > MAX_DCC_LEN) { 380 dev_err(drvdata->dev, "DCC: Programming error Base: 0x%x, offset 0x%x\n", 381 entry->base, entry->offset); 382 ret = -EINVAL; 383 return ret; 384 } 385 386 if (cfg->link) { 387 /* 388 * link already has one offset-length so new 389 * offset-length needs to be placed at 390 * bits [29:15] 391 */ 392 *pos = 15; 393 394 /* Clear bits [31:16] */ 395 cfg->link &= BM(0, 14); 396 } else { 397 /* 398 * link is empty, so new offset-length needs 399 * to be placed at bits [15:0] 400 */ 401 *pos = 0; 402 cfg->link = 1 << 15; 403 } 404 405 /* write new offset-length pair to correct position */ 406 cfg->link |= (((off-cfg->prev_off) & BM(0, 7)) | ((entry->len << 8) & BM(8, 14))) << *pos; 407 408 cfg->link |= DCC_LINK_DESCRIPTOR; 409 410 if (*pos) { 411 ret = dcc_sram_writel(drvdata, cfg->link, cfg->sram_offset); 412 if (ret) 413 return ret; 414 cfg->sram_offset += 4; 415 cfg->link = 0; 416 } 417 418 cfg->prev_off = off + entry->len - 1; 419 cfg->prev_addr = cfg->addr; 420 return ret; 421 } 422 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org