Re: [PATCH] [RFC] net: phy: smsc: Add magnetics VIO regulator support

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

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Hi Marek,

[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on net/master]
[also build test WARNING on net-next/master ipvs/master linus/master v5.11-rc2 next-20210104]
[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/Marek-Vasut/net-phy-smsc-Add-magnetics-VIO-regulator-support/20210106-001946
base:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git 4bfc4714849d005e6835bcffa3c29ebd6e5ee35d
config: x86_64-randconfig-a006-20210105 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 5c951623bc8965fa1e89660f2f5f4a2944e4981a)
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
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://github.com/0day-ci/linux/commit/014a5aebb8dfa7edde7e312123a45d99372988b7
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Marek-Vasut/net-phy-smsc-Add-magnetics-VIO-regulator-support/20210106-001946
        git checkout 014a5aebb8dfa7edde7e312123a45d99372988b7
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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/net/phy/smsc.c:306:3: warning: ignoring return value of function declared with 'warn_unused_result' attribute [-Wunused-result]
                   regulator_enable(priv->vddio);
                   ^~~~~~~~~~~~~~~~ ~~~~~~~~~~~
   1 warning generated.


vim +/warn_unused_result +306 drivers/net/phy/smsc.c

   294	
   295	static void smsc_link_change_notify(struct phy_device *phydev)
   296	{
   297		struct smsc_phy_priv *priv = phydev->priv;
   298	
   299		if (!priv->vddio)
   300			return;
   301	
   302		if (phydev->state == PHY_HALTED)
   303			regulator_disable(priv->vddio);
   304	
   305		if (phydev->state == PHY_NOLINK)
 > 306			regulator_enable(priv->vddio);
   307	}
   308	

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

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