Re: [PATCH v1 1/1] device property: Unify access to of_node

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

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Hi Andy,

I love your patch! Perhaps something to improve:

[auto build test WARNING on next-20210604]
[cannot apply to driver-core/driver-core-testing linux/master linus/master v5.13-rc4 v5.13-rc3 v5.13-rc2 v5.13-rc4]
[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/Andy-Shevchenko/device-property-Unify-access-to-of_node/20210604-211443
base:    ccc252d2e818f6a479441119ad453c3ce7c7c461
config: csky-randconfig-r024-20210604 (attached as .config)
compiler: csky-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/dfc2a97acf9b5c5ba11d180bf411721f723a9042
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Andy-Shevchenko/device-property-Unify-access-to-of_node/20210604-211443
        git checkout dfc2a97acf9b5c5ba11d180bf411721f723a9042
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=csky 

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/base/property.c: In function 'device_dma_supported':
>> drivers/base/property.c:875:48: warning: passing argument 1 of 'to_acpi_device_node' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
     875 |  return acpi_dma_supported(to_acpi_device_node(fwnode));
         |                                                ^~~~~~
   In file included from drivers/base/property.c:10:
   include/linux/acpi.h:768:77: note: expected 'struct fwnode_handle *' but argument is of type 'const struct fwnode_handle *'
     768 | static inline struct acpi_device *to_acpi_device_node(struct fwnode_handle *fwnode)
         |                                                       ~~~~~~~~~~~~~~~~~~~~~~^~~~~~
   drivers/base/property.c: In function 'device_get_dma_attr':
   drivers/base/property.c:890:48: warning: passing argument 1 of 'to_acpi_device_node' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
     890 |   attr = acpi_get_dma_attr(to_acpi_device_node(fwnode));
         |                                                ^~~~~~
   In file included from drivers/base/property.c:10:
   include/linux/acpi.h:768:77: note: expected 'struct fwnode_handle *' but argument is of type 'const struct fwnode_handle *'
     768 | static inline struct acpi_device *to_acpi_device_node(struct fwnode_handle *fwnode)
         |                                                       ~~~~~~~~~~~~~~~~~~~~~~^~~~~~


vim +875 drivers/base/property.c

   863	
   864	bool device_dma_supported(struct device *dev)
   865	{
   866		const struct fwnode_handle *fwnode = dev_fwnode(dev);
   867	
   868		/* For DT, this is always supported.
   869		 * For ACPI, this depends on CCA, which
   870		 * is determined by the acpi_dma_supported().
   871		 */
   872		if (is_of_node(fwnode))
   873			return true;
   874	
 > 875		return acpi_dma_supported(to_acpi_device_node(fwnode));
   876	}
   877	EXPORT_SYMBOL_GPL(device_dma_supported);
   878	

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

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