Re: [PATCH v3 2/2] mmc: sdhci-of-dwcmshc: Add support for Eswin EIC7700

[kernel test robot <lkp@intel.com>]

Hi,

kernel test robot noticed the following build errors:

[auto build test ERROR on linus/master]
[also build test ERROR on ulf-hansson-mmc-mirror/next v6.17 next-20251010]
[cannot apply to robh/for-next pza/reset/next pza/imx-drm/next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/hehuan1-eswincomputing-com/dt-bindings-mmc-sdhci-of-dwcmshc-Add-Eswin-EIC7700/20251010-174323
base:   linus/master
patch link:    https://lore.kernel.org/r/20251010094109.1613-1-hehuan1%40eswincomputing.com
patch subject: [PATCH v3 2/2] mmc: sdhci-of-dwcmshc: Add support for Eswin EIC7700
config: riscv-randconfig-001-20251011 (https://download.01.org/0day-ci/archive/20251011/202510110829.1yKzYvIP-lkp@intel.com/config)
compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251011/202510110829.1yKzYvIP-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202510110829.1yKzYvIP-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from drivers/mmc/host/sdhci-of-dwcmshc.c:15:
   In file included from include/linux/dma-mapping.h:8:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/riscv/include/asm/io.h:140:
   include/asm-generic/io.h:838:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     838 |         insb(addr, buffer, count);
         |         ^~~~~~~~~~~~~~~~~~~~~~~~~
   arch/riscv/include/asm/io.h:108:53: note: expanded from macro 'insb'
     108 | #define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
         |                                          ~~~~~~~~~~ ^
   In file included from drivers/mmc/host/sdhci-of-dwcmshc.c:15:
   In file included from include/linux/dma-mapping.h:8:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/riscv/include/asm/io.h:140:
   include/asm-generic/io.h:846:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     846 |         insw(addr, buffer, count);
         |         ^~~~~~~~~~~~~~~~~~~~~~~~~
   arch/riscv/include/asm/io.h:109:53: note: expanded from macro 'insw'
     109 | #define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
         |                                          ~~~~~~~~~~ ^
   In file included from drivers/mmc/host/sdhci-of-dwcmshc.c:15:
   In file included from include/linux/dma-mapping.h:8:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/riscv/include/asm/io.h:140:
   include/asm-generic/io.h:854:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     854 |         insl(addr, buffer, count);
         |         ^~~~~~~~~~~~~~~~~~~~~~~~~
   arch/riscv/include/asm/io.h:110:53: note: expanded from macro 'insl'
     110 | #define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
         |                                          ~~~~~~~~~~ ^
   In file included from drivers/mmc/host/sdhci-of-dwcmshc.c:15:
   In file included from include/linux/dma-mapping.h:8:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/riscv/include/asm/io.h:140:
   include/asm-generic/io.h:863:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     863 |         outsb(addr, buffer, count);
         |         ^~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/riscv/include/asm/io.h:122:55: note: expanded from macro 'outsb'
     122 | #define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
         |                                            ~~~~~~~~~~ ^
   In file included from drivers/mmc/host/sdhci-of-dwcmshc.c:15:
   In file included from include/linux/dma-mapping.h:8:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/riscv/include/asm/io.h:140:
   include/asm-generic/io.h:872:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     872 |         outsw(addr, buffer, count);
         |         ^~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/riscv/include/asm/io.h:123:55: note: expanded from macro 'outsw'
     123 | #define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
         |                                            ~~~~~~~~~~ ^
   In file included from drivers/mmc/host/sdhci-of-dwcmshc.c:15:
   In file included from include/linux/dma-mapping.h:8:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/riscv/include/asm/io.h:140:
   include/asm-generic/io.h:881:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     881 |         outsl(addr, buffer, count);
         |         ^~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/riscv/include/asm/io.h:124:55: note: expanded from macro 'outsl'
     124 | #define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
         |                                            ~~~~~~~~~~ ^
   In file included from drivers/mmc/host/sdhci-of-dwcmshc.c:15:
   In file included from include/linux/dma-mapping.h:8:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/riscv/include/asm/io.h:140:
   include/asm-generic/io.h:1209:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
    1209 |         return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
         |                                                   ~~~~~~~~~~ ^
>> drivers/mmc/host/sdhci-of-dwcmshc.c:300:13: error: redefinition of 'dwcmshc_enable_card_clk'
     300 | static void dwcmshc_enable_card_clk(struct sdhci_host *host)
         |             ^
   drivers/mmc/host/sdhci-of-dwcmshc.c:289:13: note: previous definition is here
     289 | static void dwcmshc_enable_card_clk(struct sdhci_host *host)
         |             ^
>> drivers/mmc/host/sdhci-of-dwcmshc.c:1179:2: error: call to undeclared function 'dwcmshc_disable_card_clk'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    1179 |         dwcmshc_disable_card_clk(host);
         |         ^
   drivers/mmc/host/sdhci-of-dwcmshc.c:1179:2: note: did you mean 'dwcmshc_enable_card_clk'?
   drivers/mmc/host/sdhci-of-dwcmshc.c:300:13: note: 'dwcmshc_enable_card_clk' declared here
     300 | static void dwcmshc_enable_card_clk(struct sdhci_host *host)
         |             ^
   drivers/mmc/host/sdhci-of-dwcmshc.c:1988:2: error: call to undeclared function 'dwcmshc_disable_card_clk'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    1988 |         dwcmshc_disable_card_clk(host);
         |         ^
   drivers/mmc/host/sdhci-of-dwcmshc.c:2070:2: error: call to undeclared function 'dwcmshc_disable_card_clk'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    2070 |         dwcmshc_disable_card_clk(host);
         |         ^
   7 warnings and 4 errors generated.

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for ARCH_HAS_ELF_CORE_EFLAGS
   Depends on [n]: BINFMT_ELF [=n] && ELF_CORE [=y]
   Selected by [y]:
   - RISCV [=y]


vim +/dwcmshc_enable_card_clk +300 drivers/mmc/host/sdhci-of-dwcmshc.c

   299	
 > 300	static void dwcmshc_enable_card_clk(struct sdhci_host *host)
   301	{
   302		u16 ctrl;
   303	
   304		ctrl = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
   305		if ((ctrl & SDHCI_CLOCK_INT_EN) && !(ctrl & SDHCI_CLOCK_CARD_EN)) {
   306			ctrl |= SDHCI_CLOCK_CARD_EN;
   307			sdhci_writew(host, ctrl, SDHCI_CLOCK_CONTROL);
   308		}
   309	}
   310	

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