Hi Shawn,

I love your patch! Perhaps something to improve:

[auto build test WARNING on balbi-usb/testing/next]
[also build test WARNING on v5.11-rc1 next-20201223]
[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/Shawn-Guo/usb-dwc3-qcom-add-URS-Host-support-for-sdm845-ACPI-boot/20201230-205430
base:   https://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git testing/next
config: xtensa-allyesconfig (attached as .config)
compiler: xtensa-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/c3faeb501efb31e035beca1c0fee1cca6ec16392
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Shawn-Guo/usb-dwc3-qcom-add-URS-Host-support-for-sdm845-ACPI-boot/20201230-205430
        git checkout c3faeb501efb31e035beca1c0fee1cca6ec16392
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=xtensa 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   drivers/usb/dwc3/dwc3-qcom.c: In function 'dwc3_qcom_create_urs_usb_platdev':
   drivers/usb/dwc3/dwc3-qcom.c:675:9: error: implicit declaration of function 'acpi_create_platform_device' [-Werror=implicit-function-declaration]
     675 |  return acpi_create_platform_device(adev, NULL);
         |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/usb/dwc3/dwc3-qcom.c:675:9: warning: returning 'int' from a function with return type 'struct platform_device *' makes pointer from integer without a cast [-Wint-conversion]
     675 |  return acpi_create_platform_device(adev, NULL);
         |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +675 drivers/usb/dwc3/dwc3-qcom.c

   659	
   660	static struct platform_device *
   661	dwc3_qcom_create_urs_usb_platdev(struct device *dev)
   662	{
   663		struct fwnode_handle *fwh;
   664		struct acpi_device *adev;
   665	
   666		/* Find the first child of URS node */
   667		fwh = fwnode_call_ptr_op(dev->fwnode, get_next_child_node, NULL);
   668		if (!fwh)
   669			return NULL;
   670	
   671		adev = to_acpi_device_node(fwh);
   672		if (!adev)
   673			return NULL;
   674	
 > 675		return acpi_create_platform_device(adev, NULL);
   676	}
   677	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org