Re: [PATCH v2 4/4] net: stmmac: Add glue layer for Sophgo SG2044 SoC

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

Hi Inochi,

kernel test robot noticed the following build warnings:

[auto build test WARNING on robh/for-next]
[also build test WARNING on sophgo/for-next sophgo/fixes net-next/main net/main linus/master v6.12-rc4 next-20241025]
[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/Inochi-Amaoto/dt-bindings-net-snps-dwmac-Add-dwmac-5-30a-version/20241025-091315
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
patch link:    https://lore.kernel.org/r/20241025011000.244350-5-inochiama%40gmail.com
patch subject: [PATCH v2 4/4] net: stmmac: Add glue layer for Sophgo SG2044 SoC
config: um-allyesconfig (https://download.01.org/0day-ci/archive/20241025/202410252215.79396yyg-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241025/202410252215.79396yyg-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/202410252215.79396yyg-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/net/ethernet/stmicro/stmmac/dwmac-sophgo.c: In function 'sophgo_dwmac_fix_mac_speed':
   drivers/net/ethernet/stmicro/stmmac/dwmac-sophgo.c:30:16: error: implicit declaration of function 'rgmii_clock' [-Werror=implicit-function-declaration]
      30 |         rate = rgmii_clock(speed);
         |                ^~~~~~~~~~~
   drivers/net/ethernet/stmicro/stmmac/dwmac-sophgo.c: In function 'sophgo_sg2044_dwmac_init':
   drivers/net/ethernet/stmicro/stmmac/dwmac-sophgo.c:46:13: warning: unused variable 'ret' [-Wunused-variable]
      46 |         int ret;
         |             ^~~
   drivers/net/ethernet/stmicro/stmmac/dwmac-sophgo.c: In function 'sophgo_dwmac_fix_mac_speed':
>> drivers/net/ethernet/stmicro/stmmac/dwmac-sophgo.c:31:12: warning: 'ret' is used uninitialized [-Wuninitialized]
      31 |         if (ret < 0) {
         |            ^
   drivers/net/ethernet/stmicro/stmmac/dwmac-sophgo.c:28:13: note: 'ret' was declared here
      28 |         int ret;
         |             ^~~
   cc1: some warnings being treated as errors

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for MODVERSIONS
   Depends on [n]: MODULES [=y] && !COMPILE_TEST [=y]
   Selected by [y]:
   - RANDSTRUCT_FULL [=y] && (CC_HAS_RANDSTRUCT [=n] || GCC_PLUGINS [=y]) && MODULES [=y]
   WARNING: unmet direct dependencies detected for GET_FREE_REGION
   Depends on [n]: SPARSEMEM [=n]
   Selected by [y]:
   - RESOURCE_KUNIT_TEST [=y] && RUNTIME_TESTING_MENU [=y] && KUNIT [=y]


vim +/ret +31 drivers/net/ethernet/stmicro/stmmac/dwmac-sophgo.c

    23	
    24	static void sophgo_dwmac_fix_mac_speed(void *priv, unsigned int speed, unsigned int mode)
    25	{
    26		struct sophgo_dwmac *dwmac = priv;
    27		long rate;
    28		int ret;
    29	
    30		rate = rgmii_clock(speed);
  > 31		if (ret < 0) {
    32			dev_err(dwmac->dev, "invalid speed %u\n", speed);
    33			return;
    34		}
    35	
    36		ret = clk_set_rate(dwmac->clk_tx, rate);
    37		if (ret)
    38			dev_err(dwmac->dev, "failed to set tx rate %lu\n", rate);
    39	}
    40	

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