Hi Mason, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on next-20200526] [also build test WARNING on v5.7-rc7] [cannot apply to spi/for-next xlnx/master linus/master linux/master v5.7-rc7 v5.7-rc6 v5.7-rc5] [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/Mason-Yang/mtd-spi-nor-add-xSPI-Octal-DTR-support/20200528-162925 base: b0523c7b1c9d0edcd6c0fe6d2cb558a9ad5c60a8 config: x86_64-allyesconfig (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 2d068e534f1671459e1b135852c1b3c10502e929) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>, old ones prefixed by <<): >> drivers/spi/spi-mxic.c:302:21: warning: result of comparison of constant 256 with expression of type 'const u8' (aka 'const unsigned char') is always false [-Wtautological-constant-out-of-range-compare] if (op->data.dtr == OP_DATA_DDR) ~~~~~~~~~~~~ ^ ~~~~~~~~~~~ 1 warning generated. vim +302 drivers/spi/spi-mxic.c 282 283 static u32 mxic_spi_mem_prep_op_cfg(const struct spi_mem_op *op) 284 { 285 u32 cfg = OP_CMD_BYTES(op->cmd.nbytes) | 286 OP_CMD_BUSW(fls(op->cmd.buswidth) - 1) | 287 (op->cmd.dtr ? OP_CMD_DDR : 0); 288 289 if (op->addr.nbytes) 290 cfg |= OP_ADDR_BYTES(op->addr.nbytes) | 291 OP_ADDR_BUSW(fls(op->addr.buswidth) - 1) | 292 (op->addr.dtr ? OP_ADDR_DDR : 0); 293 294 if (op->dummy.nbytes) 295 cfg |= OP_DUMMY_CYC(op->dummy.nbytes); 296 297 if (op->data.nbytes) { 298 cfg |= OP_DATA_BUSW(fls(op->data.buswidth) - 1) | 299 (op->data.dtr ? OP_DATA_DDR : 0); 300 if (op->data.dir == SPI_MEM_DATA_IN) { 301 cfg |= OP_READ; > 302 if (op->data.dtr == OP_DATA_DDR) 303 cfg |= OP_DQS_EN; 304 } 305 } 306 307 return cfg; 308 } 309 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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