Re: [net-next,v6] net: ethernet: rtsn: Add support for Renesas Ethernet-TSN

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

Hi Niklas,

kernel test robot noticed the following build warnings:

[auto build test WARNING on linus/master]
[also build test WARNING on v6.10-rc3 next-20240607]
[cannot apply to horms-ipvs/master]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Niklas-S-derlund/net-ethernet-rtsn-Add-support-for-Renesas-Ethernet-TSN/20240610-220814
base:   linus/master
patch link:    https://lore.kernel.org/r/20240610135935.2519155-1-niklas.soderlund%2Brenesas%40ragnatech.se
patch subject: [net-next,v6] net: ethernet: rtsn: Add support for Renesas Ethernet-TSN
config: hexagon-allmodconfig (https://download.01.org/0day-ci/archive/20240611/202406111130.CCbMJGDt-lkp@intel.com/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 4403cdbaf01379de96f8d0d6ea4f51a085e37766)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240611/202406111130.CCbMJGDt-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202406111130.CCbMJGDt-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/net/ethernet/renesas/rtsn.c:10:
   In file included from include/linux/dma-mapping.h:11:
   In file included from include/linux/scatterlist.h:8:
   In file included from include/linux/mm.h:2253:
   include/linux/vmstat.h:514:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     514 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
   In file included from drivers/net/ethernet/renesas/rtsn.c:10:
   In file included from include/linux/dma-mapping.h:11:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/hexagon/include/asm/io.h:328:
   include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     548 |         val = __raw_readb(PCI_IOBASE + addr);
         |                           ~~~~~~~~~~ ^
   include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     561 |         val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
         |                                                         ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
      37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
         |                                                   ^
   In file included from drivers/net/ethernet/renesas/rtsn.c:10:
   In file included from include/linux/dma-mapping.h:11:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/hexagon/include/asm/io.h:328:
   include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     574 |         val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
         |                                                         ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
      35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
         |                                                   ^
   In file included from drivers/net/ethernet/renesas/rtsn.c:10:
   In file included from include/linux/dma-mapping.h:11:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/hexagon/include/asm/io.h:328:
   include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     585 |         __raw_writeb(value, PCI_IOBASE + addr);
         |                             ~~~~~~~~~~ ^
   include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     595 |         __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
         |                                                       ~~~~~~~~~~ ^
   include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     605 |         __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
         |                                                       ~~~~~~~~~~ ^
>> drivers/net/ethernet/renesas/rtsn.c:913:5: warning: variable 'iface' is uninitialized when used here [-Wuninitialized]
     913 |                                 iface);
         |                                 ^~~~~
   drivers/net/ethernet/renesas/rtsn.c:904:2: note: variable 'iface' is declared here
     904 |         phy_interface_t iface;
         |         ^
   8 warnings generated.


vim +/iface +913 drivers/net/ethernet/renesas/rtsn.c

   898	
   899	static int rtsn_phy_init(struct rtsn_private *priv)
   900	{
   901		struct device_node *np = priv->ndev->dev.parent->of_node;
   902		struct phy_device *phydev;
   903		struct device_node *phy;
   904		phy_interface_t iface;
   905	
   906		priv->link = 0;
   907	
   908		phy = of_parse_phandle(np, "phy-handle", 0);
   909		if (!phy)
   910			return -ENOENT;
   911	
   912		phydev = of_phy_connect(priv->ndev, phy, rtsn_adjust_link, 0,
 > 913					iface);
   914		of_node_put(phy);
   915		if (!phydev)
   916			return -ENOENT;
   917	
   918		/* Only support full-duplex mode */
   919		phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_10baseT_Half_BIT);
   920		phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_100baseT_Half_BIT);
   921		phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
   922	
   923		phy_attached_info(phydev);
   924	
   925		return 0;
   926	}
   927	

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