[kbuild-all] [linux-next:master 4765/6512] drivers/iommu/sprd-iommu.c:456:42: sparse: sparse: Using plain integer as NULL pointer

tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: d949689e7383cd5271470f2b99dbe2fd3199bffd commit: b23e4fc4e3faed0b8b604079c44a244da3ec941a [4765/6512] iommu: add Unisoc IOMMU basic driver config: m68k-randconfig-s032-20210323 (attached as .config) compiler: m68k-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-277-gc089cd2d-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout b23e4fc4e3faed0b8b604079c44a244da3ec941a # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=m68k If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) drivers/iommu/sprd-iommu.c: note: in included file (through arch/m68k/include/asm/io.h, include/linux/scatterlist.h, include/linux/dma-mapping.h): include/asm-generic/io.h:299:9: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned int volatile [usertype] @@ got restricted __le32 [usertype] @@ include/asm-generic/io.h:299:9: sparse: expected unsigned int volatile [usertype] include/asm-generic/io.h:299:9: sparse: got restricted __le32 [usertype] include/asm-generic/io.h:299:9: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned int volatile [usertype] @@ got restricted __le32 [usertype] @@ include/asm-generic/io.h:299:9: sparse: expected unsigned int volatile [usertype] include/asm-generic/io.h:299:9: sparse: got restricted __le32 [usertype] include/asm-generic/io.h:299:9: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned int volatile [usertype] @@ got restricted __le32 [usertype] @@ include/asm-generic/io.h:299:9: sparse: expected unsigned int volatile [usertype] include/asm-generic/io.h:299:9: sparse: got restricted __le32 [usertype] include/asm-generic/io.h:299:9: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned int volatile [usertype] @@ got restricted __le32 [usertype] @@ include/asm-generic/io.h:299:9: sparse: expected unsigned int volatile [usertype] include/asm-generic/io.h:299:9: sparse: got restricted __le32 [usertype] include/asm-generic/io.h:299:9: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned int volatile [usertype] @@ got restricted __le32 [usertype] @@ include/asm-generic/io.h:299:9: sparse: expected unsigned int volatile [usertype] include/asm-generic/io.h:299:9: sparse: got restricted __le32 [usertype] include/asm-generic/io.h:299:9: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned int volatile [usertype] @@ got restricted __le32 [usertype] @@ include/asm-generic/io.h:299:9: sparse: expected unsigned int volatile [usertype] include/asm-generic/io.h:299:9: sparse: got restricted __le32 [usertype] include/asm-generic/io.h:267:16: sparse: sparse: cast to restricted __le32 include/asm-generic/io.h:267:16: sparse: sparse: cast to restricted __le32 include/asm-generic/io.h:267:16: sparse: sparse: cast to restricted __le32 include/asm-generic/io.h:267:16: sparse: sparse: cast to restricted __le32 include/asm-generic/io.h:267:16: sparse: sparse: cast to restricted __le32 include/asm-generic/io.h:267:16: sparse: sparse: cast to restricted __le32 include/asm-generic/io.h:299:9: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned int volatile [usertype] @@ got restricted __le32 [usertype] @@ include/asm-generic/io.h:299:9: sparse: expected unsigned int volatile [usertype] include/asm-generic/io.h:299:9: sparse: got restricted __le32 [usertype] include/asm-generic/io.h:299:9: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned int volatile [usertype] @@ got restricted __le32 [usertype] @@ include/asm-generic/io.h:299:9: sparse: expected unsigned int volatile [usertype] include/asm-generic/io.h:299:9: sparse: got restricted __le32 [usertype] include/asm-generic/io.h:267:16: sparse: sparse: cast to restricted __le32 include/asm-generic/io.h:267:16: sparse: sparse: cast to restricted __le32 include/asm-generic/io.h:267:16: sparse: sparse: cast to restricted __le32 include/asm-generic/io.h:267:16: sparse: sparse: cast to restricted __le32 include/asm-generic/io.h:267:16: sparse: sparse: cast to restricted __le32 include/asm-generic/io.h:267:16: sparse: sparse: cast to restricted __le32 vim +456 drivers/iommu/sprd-iommu.c 446 447 /* 448 * Clock is not required, access to some of IOMMUs is controlled by gate 449 * clk, enabled clocks for that kind of IOMMUs before accessing. 450 * Return 0 for success or no clocks found. 451 */ 452 static int sprd_iommu_clk_enable(struct sprd_iommu_device *sdev) 453 { 454 struct clk *eb; 455 457 if (!eb) 458 return 0; 459 460 if (IS_ERR(eb)) 461 return PTR_ERR(eb); 462 463 sdev->eb = eb; 464 return clk_prepare_enable(eb); 465 } 466 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org