Hi Sanjay, I love your patch! Perhaps something to improve: [auto build test WARNING on linus/master] [also build test WARNING on v5.5-rc3 next-20191220] [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/Sanjay-R-Mehta/Add-AMD-PassThru-DMA-Engine-driver/20191227-234539 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 46cf053efec6a3a5f343fead837777efe8252a46 reproduce: # apt-get install sparse # sparse version: v0.6.1-129-g341daf20-dirty make ARCH=x86_64 allmodconfig make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> sparse warnings: (new ones prefixed by >>) >> drivers/dma/ptdma/ptdma-dev.c:139:5: sparse: sparse: symbol 'pt_present' was not declared. Should it be static? drivers/dma/ptdma/ptdma-dev.c:169:25: sparse: sparse: cast from restricted __le32 drivers/dma/ptdma/ptdma-dev.c:169:23: sparse: sparse: incorrect type in assignment (different base types) drivers/dma/ptdma/ptdma-dev.c:169:23: sparse: expected unsigned int [usertype] drivers/dma/ptdma/ptdma-dev.c:169:23: sparse: got restricted __le32 [usertype] drivers/dma/ptdma/ptdma-dev.c:199:21: sparse: sparse: incorrect type in assignment (different base types) drivers/dma/ptdma/ptdma-dev.c:199:21: sparse: expected restricted __le32 [addressable] [assigned] [usertype] length drivers/dma/ptdma/ptdma-dev.c:199:21: sparse: got unsigned long long [usertype] src_len drivers/dma/ptdma/ptdma-dev.c:201:21: sparse: sparse: incorrect type in assignment (different base types) drivers/dma/ptdma/ptdma-dev.c:201:21: sparse: expected restricted __le32 [addressable] [assigned] [usertype] src_lo drivers/dma/ptdma/ptdma-dev.c:201:21: sparse: got unsigned int [usertype] drivers/dma/ptdma/ptdma-dev.c:204:21: sparse: sparse: incorrect type in assignment (different base types) drivers/dma/ptdma/ptdma-dev.c:204:21: sparse: expected restricted __le32 [addressable] [assigned] [usertype] dst_lo drivers/dma/ptdma/ptdma-dev.c:204:21: sparse: got unsigned int [usertype] Please review and possibly fold the followup patch. --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx Intel Corporation