Hi Tomohiro,

[auto build test WARNING on input/next]
[also build test WARNING on v4.11-rc8 next-20170428]
[if your patch is applied to the wrong git tree, please drop us a note to help 
improve the system]

url:    
https://github.com/0day-ci/linux/commits/Tomohiro-Yoshidomi/Input-psxpad-spi-Add-PlayStation-1-2-joypads-via-SPI-interface-Driver/20170430-114033
base:   https://git.kernel.org/pub/scm/linux/kernel/git/dtor/input.git next
config: ia64-allmodconfig (attached as .config)
compiler: ia64-linux-gcc (GCC) 6.2.0
reproduce:
        wget 
https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O 
~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=ia64 

Note: it may well be a FALSE warning. FWIW you are at least aware of it now.
http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings

All warnings (new ones prefixed by >>):

   drivers/input/joystick/psxpad-spi.c: In function 'psxpad_spi_probe':
>> drivers/input/joystick/psxpad-spi.c:319:3: warning: 'err' may be used 
>> uninitialized in this function [-Wmaybe-uninitialized]
      dev_err(&spi->dev,
      ^~~~~~~~~~~~~~~~~~
       "%s: failed to pdev alloc mode: %d\n",
       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
       __func__, err);
       ~~~~~~~~~~~~~~

vim +/err +319 drivers/input/joystick/psxpad-spi.c

   303          return 0;
   304  }
   305  #endif  /* CONFIG_JOYSTICK_PSXPAD_SPI_FF */
   306  
   307  static int psxpad_spi_probe(struct spi_device *spi)
   308  {
   309          struct psxpad *pad;
   310          struct input_polled_dev *pdev;
   311          struct input_dev *idev;
   312          int err;
   313  
   314          pad = devm_kzalloc(&spi->dev, sizeof(struct psxpad), 
GFP_KERNEL);
   315          if (!pad)
   316                  return -ENOMEM;
   317          pdev = input_allocate_polled_device();
   318          if (!pdev) {
 > 319                  dev_err(&spi->dev,
   320                          "%s: failed to pdev alloc mode: %d\n",
   321                          __func__, err);
   322                  return -ENOMEM;
   323          }
   324  
   325          /* input poll device settings */
   326          pad->pdev = pdev;
   327          pad->spi = spi;

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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