[ljones-mfd:for-mfd-next 56/66] drivers/mfd/mfd-core.c:168:1: warning: no return statement in function returning non-void

[ljones-mfd:for-mfd-next 56/66] drivers/mfd/mfd-core.c:168:1: warning: no return statement in function returning non-void

[kernel test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git for-mfd-next
head:   c23452e6a319bc607b54a1cce9c74c9033565af3
commit: c509ed7e7d376a7bc3aeb17133c0d117a887916a [56/66] mfd: core: Make a best effort attempt to match devices with the correct of_nodes
config: ia64-randconfig-r024-20200717 (attached as .config)
compiler: ia64-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
        git checkout c509ed7e7d376a7bc3aeb17133c0d117a887916a
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=ia64 

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/mfd/mfd-core.c: In function 'mfd_match_of_node_to_dev':
>> drivers/mfd/mfd-core.c:168:1: warning: no return statement in function returning non-void [-Wreturn-type]
     168 | }
         | ^

vim +168 drivers/mfd/mfd-core.c

   119	
   120	static int mfd_match_of_node_to_dev(struct platform_device *pdev,
   121					    struct device_node *np,
   122					    const struct mfd_cell *cell)
   123	{
   124	#if IS_ENABLED(CONFIG_OF)
   125		struct mfd_of_node_entry *of_entry;
   126		const __be32 *reg;
   127		u64 of_node_addr;
   128	
   129		/* Skip devices 'disabled' by Device Tree */
   130		if (!of_device_is_available(np))
   131			return -ENODEV;
   132	
   133		/* Skip if OF node has previously been allocated to a device */
   134		list_for_each_entry(of_entry, &mfd_of_node_list, list)
   135			if (of_entry->np == np)
   136				return -EAGAIN;
   137	
   138		if (!cell->use_of_reg)
   139			/* No of_reg defined - allocate first free compatible match */
   140			goto allocate_of_node;
   141	
   142		/* We only care about each node's first defined address */
   143		reg = of_get_address(np, 0, NULL, NULL);
   144		if (!reg)
   145			/* OF node does not contatin a 'reg' property to match to */
   146			return -EAGAIN;
   147	
   148		of_node_addr = of_read_number(reg, of_n_addr_cells(np));
   149	
   150		if (cell->of_reg != of_node_addr)
   151			/* No match */
   152			return -EAGAIN;
   153	
   154	allocate_of_node:
   155		of_entry = kzalloc(sizeof(*of_entry), GFP_KERNEL);
   156		if (!of_entry)
   157			return -ENOMEM;
   158	
   159		of_entry->dev = &pdev->dev;
   160		of_entry->np = np;
   161		list_add_tail(&of_entry->list, &mfd_of_node_list);
   162	
   163		pdev->dev.of_node = np;
   164		pdev->dev.fwnode = &np->fwnode;
   165	
   166		return 0;
   167	#endif
 > 168	}
   169	

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

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