Hi Chuanhong, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on arm-soc/for-next] [cannot apply to v5.4-rc7 next-20191111] [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/Chuanhong-Guo/mtd-mtk-quadspi-add-support-for-DMA-reading/20191112-145019 base: https://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc.git for-next config: sparc-allyesconfig (attached as .config) compiler: sparc64-linux-gcc (GCC) 7.4.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=7.4.0 make.cross ARCH=sparc If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): drivers/mtd/spi-nor/mtk-quadspi.c: In function 'mtk_nor_read_dma_bounce': >> drivers/mtd/spi-nor/mtk-quadspi.c:349:22: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] mem_unaligned_len = (u32)buf % MTK_NOR_DMA_ALIGN; ^ drivers/mtd/spi-nor/mtk-quadspi.c: In function 'mtk_nor_read': drivers/mtd/spi-nor/mtk-quadspi.c:369:6: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] (u32)buffer % MTK_NOR_DMA_ALIGN || from % MTK_NOR_DMA_ALIGN) ^ vim +349 drivers/mtd/spi-nor/mtk-quadspi.c 330 331 static ssize_t mtk_nor_read_dma_bounce(struct mtk_nor *mtk_nor, loff_t from, 332 size_t length, u_char *buffer) 333 { 334 ssize_t nor_unaligned_len = from % MTK_NOR_DMA_ALIGN; 335 loff_t read_from = from & ~(MTK_NOR_DMA_ALIGN - 1); 336 ssize_t read_len; 337 u_char *buf; 338 u_char *bouncebuf; 339 size_t mem_unaligned_len; 340 341 if (length > MTK_NOR_MAX_BBUF_READ) 342 length = MTK_NOR_MAX_BBUF_READ; 343 read_len = length + nor_unaligned_len + MTK_NOR_DMA_ALIGN; 344 345 buf = kmalloc(read_len + MTK_NOR_DMA_ALIGN, GFP_KERNEL); 346 if (!buf) 347 return -ENOMEM; 348 > 349 mem_unaligned_len = (u32)buf % MTK_NOR_DMA_ALIGN; 350 bouncebuf = (buf + MTK_NOR_DMA_ALIGN) - mem_unaligned_len; 351 352 read_len = mtk_nor_read_dma(mtk_nor, read_from, read_len, bouncebuf); 353 if (read_len > 0) 354 memcpy(buffer, bouncebuf + nor_unaligned_len, length); 355 356 kfree(buf); 357 return length; 358 } 359 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx Intel Corporation
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