Subject: Re: [PATCH v1 2/2] net: stmmac: Add NPCM support

From: kernel test robot <[email-masked]>
Date: Wed, 22 Nov 2023 12:45:02 +0800

Hi Tomer,

kernel test robot noticed the following build warnings:

[auto build test WARNING on robh/for-next]
[also build test WARNING on net-next/main net/main linus/master v6.7-rc2 next-20231121]
[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/Tomer-Maimon/dt-bindings-net-Add-support-NPCM-dwmac/20231121-231908
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
patch link:    https://lore.kernel.org/r/20231121151733.2015384-3-tmaimon77%40gmail.com
patch subject: [PATCH v1 2/2] net: stmmac: Add NPCM support
config: arc-allmodconfig (https://download.01.org/0day-ci/archive/20231122/[email-masked]/config)
compiler: arceb-elf-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231122/[email-masked]/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 <[email-masked]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email-masked]/

All warnings (new ones prefixed by >>):

>> drivers/net/ethernet/stmicro/stmmac/dwmac-npcm.c:53:6: warning: no previous prototype for 'npcm_dwmac_pcs_init' [-Wmissing-prototypes]
      53 | void npcm_dwmac_pcs_init(struct npcm_dwmac *dwmac, struct device *dev,
         |      ^~~~~~~~~~~~~~~~~~~

vim +/npcm_dwmac_pcs_init +53 drivers/net/ethernet/stmicro/stmmac/dwmac-npcm.c

    52	
  > 53	void npcm_dwmac_pcs_init(struct npcm_dwmac *dwmac, struct device *dev,
    54				 struct plat_stmmacenet_data *plat_dat)
    55	{
    56		u16 val;
    57	
    58		iowrite16((u16)(SR_MII_CTRL >> 9), dwmac->reg + IND_AC_BA_REG);
    59		val = ioread16(dwmac->reg + PCS_SR_MII_CTRL_REG);
    60		val |= PCS_RST;
    61		iowrite16(val, dwmac->reg + PCS_SR_MII_CTRL_REG);
    62	
    63		while (val & PCS_RST)
    64			val = ioread16(dwmac->reg + PCS_SR_MII_CTRL_REG);
    65	
    66		val &= ~(PCS_AN_ENABLE);
    67		iowrite16(val, dwmac->reg + PCS_SR_MII_CTRL_REG);
    68	}
    69	

-- 
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https://github.com/intel/lkp-tests/wiki