Hi, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on char-misc/char-misc-testing] [also build test WARNING on soc/for-next linus/master v5.9-rc3 next-20200828] [cannot apply to linux/master] [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/ricky_wu-realtek-com/misc-rtsx-add-power-saving-function-and-bios-guide-options/20200901-145147 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git dd5597245d35cfbb0890b8a868028aa1d2018701 config: arm-randconfig-r003-20200901 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c10e63677f5d20f18010f8f68c631ddc97546f7d) 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 # install arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/misc/cardreader/rts5249.c:174:16: warning: result of comparison of constant 1024 with expression of type 'u8' (aka 'unsigned char') is always true [-Wtautological-constant-out-of-range-compare] for (j = 0; j < 1024; j++) { ~ ^ ~~~~ drivers/misc/cardreader/rts5249.c:190:18: warning: result of comparison of constant 1024 with expression of type 'u8' (aka 'unsigned char') is always true [-Wtautological-constant-out-of-range-compare] for (j = 0; j < 1024; j++) { ~ ^ ~~~~ drivers/misc/cardreader/rts5249.c:215:17: warning: result of comparison of constant 1024 with expression of type 'u8' (aka 'unsigned char') is always true [-Wtautological-constant-out-of-range-compare] for (j = 0; j < 1024; j++) { ~ ^ ~~~~ 3 warnings generated. # https://github.com/0day-ci/linux/commit/4304cb88130927a0a107aa87d999fe82e3153139 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review ricky_wu-realtek-com/misc-rtsx-add-power-saving-function-and-bios-guide-options/20200901-145147 git checkout 4304cb88130927a0a107aa87d999fe82e3153139 vim +174 drivers/misc/cardreader/rts5249.c 154 155 static void rts52xa_save_content_from_efuse(struct rtsx_pcr *pcr) 156 { 157 u8 cnt, sv; 158 u8 j = 0; 159 u8 tmp; 160 u8 val; 161 int i; 162 163 rtsx_pci_write_register(pcr, RTS524A_PME_FORCE_CTL, 164 REG_EFUSE_BYPASS | REG_EFUSE_POR, REG_EFUSE_POR); 165 udelay(1); 166 167 pcr_dbg(pcr, "Enable efuse por!"); 168 pcr_dbg(pcr, "save efuse to autoload"); 169 170 rtsx_pci_write_register(pcr, RTS525A_EFUSE_ADD, REG_EFUSE_ADD_MASK, 0x00); 171 rtsx_pci_write_register(pcr, RTS525A_EFUSE_CTL, 172 REG_EFUSE_ENABLE | REG_EFUSE_MODE, REG_EFUSE_ENABLE); 173 /* Wait transfer end */ > 174 for (j = 0; j < 1024; j++) { 175 rtsx_pci_read_register(pcr, RTS525A_EFUSE_CTL, &tmp); 176 if ((tmp & 0x80) == 0) 177 break; 178 } 179 rtsx_pci_read_register(pcr, RTS525A_EFUSE_DATA, &val); 180 cnt = val & 0x0F; 181 sv = val & 0x10; 182 183 if (sv) { 184 for (i = 0; i < 4; i++) { 185 rtsx_pci_write_register(pcr, RTS525A_EFUSE_ADD, 186 REG_EFUSE_ADD_MASK, 0x04 + i); 187 rtsx_pci_write_register(pcr, RTS525A_EFUSE_CTL, 188 REG_EFUSE_ENABLE | REG_EFUSE_MODE, REG_EFUSE_ENABLE); 189 /* Wait transfer end */ 190 for (j = 0; j < 1024; j++) { 191 rtsx_pci_read_register(pcr, RTS525A_EFUSE_CTL, &tmp); 192 if ((tmp & 0x80) == 0) 193 break; 194 } 195 rtsx_pci_read_register(pcr, RTS525A_EFUSE_DATA, &val); 196 rtsx_pci_write_register(pcr, 0xFF04 + i, 0xFF, val); 197 } 198 } else { 199 rtsx_pci_write_register(pcr, 0xFF04, 0xFF, (u8)PCI_VID(pcr)); 200 rtsx_pci_write_register(pcr, 0xFF05, 0xFF, (u8)(PCI_VID(pcr) >> 8)); 201 rtsx_pci_write_register(pcr, 0xFF06, 0xFF, (u8)PCI_PID(pcr)); 202 rtsx_pci_write_register(pcr, 0xFF07, 0xFF, (u8)(PCI_PID(pcr) >> 8)); 203 } 204 205 for (i = 0; i < cnt * 4; i++) { 206 if (sv) 207 rtsx_pci_write_register(pcr, RTS525A_EFUSE_ADD, 208 REG_EFUSE_ADD_MASK, 0x08 + i); 209 else 210 rtsx_pci_write_register(pcr, RTS525A_EFUSE_ADD, 211 REG_EFUSE_ADD_MASK, 0x04 + i); 212 rtsx_pci_write_register(pcr, RTS525A_EFUSE_CTL, 213 REG_EFUSE_ENABLE | REG_EFUSE_MODE, REG_EFUSE_ENABLE); 214 /* Wait transfer end */ 215 for (j = 0; j < 1024; j++) { 216 rtsx_pci_read_register(pcr, RTS525A_EFUSE_CTL, &tmp); 217 if ((tmp & 0x80) == 0) 218 break; 219 } 220 rtsx_pci_read_register(pcr, RTS525A_EFUSE_DATA, &val); 221 rtsx_pci_write_register(pcr, 0xFF08 + i, 0xFF, val); 222 } 223 rtsx_pci_write_register(pcr, 0xFF00, 0xFF, (cnt & 0x7F) | 0x80); 224 rtsx_pci_write_register(pcr, RTS524A_PME_FORCE_CTL, 225 REG_EFUSE_BYPASS | REG_EFUSE_POR, REG_EFUSE_BYPASS); 226 pcr_dbg(pcr, "Disable efuse por!"); 227 } 228 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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