Re: [jarkko-tpmdd:master 3/3] drivers/char/tpm/tpm_tis_synquacer.c:89:12: warning: incompatible pointer to integer conversion passing 'const u8 *' (aka 'const unsigned char *') to parameter of type 'u8' (aka 'unsigned char')
From: Jarkko Sakkinen
Date: Thu Apr 14 2022 - 08:11:19 EST
On Sun, Apr 10, 2022 at 01:33:01AM +0800, kernel test robot wrote:
> tree: git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd.git master
> head: b6e0cdb87bf37357489de1069d55bd59f008daeb
> commit: b6e0cdb87bf37357489de1069d55bd59f008daeb [3/3] tpm: Remove read16/read32/write32 calls from tpm_tis_phy_ops
> config: riscv-randconfig-r042-20220409 (https://download.01.org/0day-ci/archive/20220410/202204100151.9v5nSRu6-lkp@xxxxxxxxx/config)
> compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 256c6b0ba14e8a7ab6373b61b7193ea8c0a3651c)
> 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 riscv cross compiling tool for clang build
> # apt-get install binutils-riscv64-linux-gnu
> # https://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd.git/commit/?id=b6e0cdb87bf37357489de1069d55bd59f008daeb
> git remote add jarkko-tpmdd git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd.git
> git fetch --no-tags jarkko-tpmdd master
> git checkout b6e0cdb87bf37357489de1069d55bd59f008daeb
> # save the config file to linux build tree
> mkdir build_dir
> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash drivers/char/tpm/
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@xxxxxxxxx>
>
> All warnings (new ones prefixed by >>):
>
> In file included from drivers/char/tpm/tpm_tis_synquacer.c:14:
> In file included from drivers/char/tpm/tpm.h:28:
> include/linux/tpm_eventlog.h:167:6: warning: variable 'mapping_size' set but not used [-Wunused-but-set-variable]
> int mapping_size;
> ^
> drivers/char/tpm/tpm_tis_synquacer.c:43:9: warning: unused variable 'result_le32' [-Wunused-variable]
> __le32 result_le32;
> ^
> drivers/char/tpm/tpm_tis_synquacer.c:45:6: warning: unused variable 'result32' [-Wunused-variable]
> u32 result32;
> ^
> drivers/char/tpm/tpm_tis_synquacer.c:42:9: warning: unused variable 'result_le16' [-Wunused-variable]
> __le16 result_le16;
> ^
> drivers/char/tpm/tpm_tis_synquacer.c:44:6: warning: unused variable 'result16' [-Wunused-variable]
> u16 result16;
> ^
> >> drivers/char/tpm/tpm_tis_synquacer.c:89:12: warning: incompatible pointer to integer conversion passing 'const u8 *' (aka 'const unsigned char *') to parameter of type 'u8' (aka 'unsigned char') [-Wint-conversion]
> iowrite8(&value[3], phy->iobase + addr + 3);
> ^~~~~~~~~
> include/asm-generic/io.h:744:32: note: passing argument to parameter 'value' here
> static inline void iowrite8(u8 value, volatile void __iomem *addr)
> ^
> drivers/char/tpm/tpm_tis_synquacer.c:90:12: warning: incompatible pointer to integer conversion passing 'const u8 *' (aka 'const unsigned char *') to parameter of type 'u8' (aka 'unsigned char') [-Wint-conversion]
> iowrite8(&value[2], phy->iobase + addr + 2);
> ^~~~~~~~~
> include/asm-generic/io.h:744:32: note: passing argument to parameter 'value' here
> static inline void iowrite8(u8 value, volatile void __iomem *addr)
> ^
> drivers/char/tpm/tpm_tis_synquacer.c:91:12: warning: incompatible pointer to integer conversion passing 'const u8 *' (aka 'const unsigned char *') to parameter of type 'u8' (aka 'unsigned char') [-Wint-conversion]
> iowrite8(&value[1], phy->iobase + addr + 1);
> ^~~~~~~~~
> include/asm-generic/io.h:744:32: note: passing argument to parameter 'value' here
> static inline void iowrite8(u8 value, volatile void __iomem *addr)
> ^
> drivers/char/tpm/tpm_tis_synquacer.c:92:12: warning: incompatible pointer to integer conversion passing 'const u8 *' (aka 'const unsigned char *') to parameter of type 'u8' (aka 'unsigned char') [-Wint-conversion]
> iowrite8(&value[0], phy->iobase + addr);
> ^~~~~~~~~
> include/asm-generic/io.h:744:32: note: passing argument to parameter 'value' here
> static inline void iowrite8(u8 value, volatile void __iomem *addr)
> ^
> drivers/char/tpm/tpm_tis_synquacer.c:73:9: warning: unused variable 'result_le32' [-Wunused-variable]
> __le32 result_le32;
> ^
> drivers/char/tpm/tpm_tis_synquacer.c:74:6: warning: unused variable 'result16' [-Wunused-variable]
> u16 result16;
> ^
> drivers/char/tpm/tpm_tis_synquacer.c:72:9: warning: unused variable 'result_le16' [-Wunused-variable]
> __le16 result_le16;
> ^
> drivers/char/tpm/tpm_tis_synquacer.c:75:6: warning: unused variable 'result32' [-Wunused-variable]
> u32 result32;
> ^
> 13 warnings generated.
>
>
> vim +89 drivers/char/tpm/tpm_tis_synquacer.c
>
> 66
> 67 static int tpm_tis_synquacer_write_bytes(struct tpm_tis_data *data, u32 addr,
> 68 u16 len, const u8 *value,
> 69 enum tpm_tis_io_mode io_mode)
> 70 {
> 71 struct tpm_tis_synquacer_phy *phy = to_tpm_tis_tcg_phy(data);
> 72 __le16 result_le16;
> 73 __le32 result_le32;
> 74 u16 result16;
> 75 u32 result32;
> 76
> 77 switch (io_mode) {
> 78 case TPM_TIS_PHYS_8:
> 79 while (len--)
> 80 iowrite8(*value++, phy->iobase + addr);
> 81 break;
> 82 case TPM_TIS_PHYS_16:
> 83 return -EINVAL;
> 84 case TPM_TIS_PHYS_32:
> 85 /*
> 86 * Due to the limitation of SPI controller on SynQuacer,
> 87 * 16/32 bits access must be done in byte-wise and descending order.
> 88 */
> > 89 iowrite8(&value[3], phy->iobase + addr + 3);
> 90 iowrite8(&value[2], phy->iobase + addr + 2);
> 91 iowrite8(&value[1], phy->iobase + addr + 1);
> 92 iowrite8(&value[0], phy->iobase + addr);
> 93 break;
> 94 }
> 95
> 96 return 0;
> 97 }
> 98
>
> --
> 0-DAY CI Kernel Test Service
> https://01.org/lkp
Johannes, can you fix the sparse issues, and send +1 version,
and I'll replace the patch currently in my tree with that?
BR, Jarkko