Re: [PATCH 1/2] Add support for Cadence XSPI controller

[kernel test robot]

Hi Jayshri,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on spi/for-next]
[also build test WARNING on v5.10-rc7 next-20201208]
[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]

url:    https://github.com/0day-ci/linux/commits/Jayshri-Pawar/Driver-for-Cadence-xSPI-flash-controller/20201209-160406
base:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next
config: sparc-allyesconfig (attached as .config)
compiler: sparc64-linux-gcc (GCC) 9.3.0
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
        # https://github.com/0day-ci/linux/commit/5b258ff21564ca007e3b54d865c3cfb9851ed00a
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Jayshri-Pawar/Driver-for-Cadence-xSPI-flash-controller/20201209-160406
        git checkout 5b258ff21564ca007e3b54d865c3cfb9851ed00a
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=sparc 

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 arch/sparc/include/asm/io.h:5,
                    from include/linux/io.h:13,
                    from drivers/spi/spi-cadence-xspi.c:15:
   drivers/spi/spi-cadence-xspi.c: In function 'cdns_xspi_send_stig_command':
>> arch/sparc/include/asm/io_64.h:179:2: warning: '*((void *)&cmd_regs+20)' is used uninitialized in this function [-Wuninitialized]
     179 |  __asm__ __volatile__("stwa\t%r0, [%1] %2\t/* pci_writel */"
         |  ^~~~~~~
   drivers/spi/spi-cadence-xspi.c:521:6: note: '*((void *)&cmd_regs+20)' was declared here
     521 |  u32 cmd_regs[5] = {0};
         |      ^~~~~~~~

vim +179 arch/sparc/include/asm/io_64.h

f5e706ad886b6a5 include/asm-sparc/io_64.h      Sam Ravnborg  2008-07-17  174  
79294d7eff89f65 arch/sparc/include/asm/io_64.h Sam Ravnborg  2014-07-20  175  #define writel writel
7c3969c3a4f3593 arch/sparc/include/asm/io_64.h Arnd Bergmann 2014-11-19  176  #define writel_relaxed writel
79294d7eff89f65 arch/sparc/include/asm/io_64.h Sam Ravnborg  2014-07-20  177  static inline void writel(u32 l, volatile void __iomem *addr)
f5e706ad886b6a5 include/asm-sparc/io_64.h      Sam Ravnborg  2008-07-17  178  {
f5e706ad886b6a5 include/asm-sparc/io_64.h      Sam Ravnborg  2008-07-17 @179  	__asm__ __volatile__("stwa\t%r0, [%1] %2\t/* pci_writel */"
f5e706ad886b6a5 include/asm-sparc/io_64.h      Sam Ravnborg  2008-07-17  180  			     : /* no outputs */
f5e706ad886b6a5 include/asm-sparc/io_64.h      Sam Ravnborg  2008-07-17  181  			     : "Jr" (l), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
f5e706ad886b6a5 include/asm-sparc/io_64.h      Sam Ravnborg  2008-07-17  182  			     : "memory");
f5e706ad886b6a5 include/asm-sparc/io_64.h      Sam Ravnborg  2008-07-17  183  }
f5e706ad886b6a5 include/asm-sparc/io_64.h      Sam Ravnborg  2008-07-17  184  

---
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