linux-kernel - [rmk-arm:zii 183/199] drivers/net/ethernet/mediatek/mtk_eth_soc.c:378:1: error: non-void function does not return a value

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Date:   Sun, 13 Mar 2022 01:22:05 +0800
From:   kernel test robot <lkp@...el.com>
To:     "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org
Subject: [rmk-arm:zii 183/199]
 drivers/net/ethernet/mediatek/mtk_eth_soc.c:378:1: error: non-void function
 does not return a value

tree:   git://git.armlinux.org.uk/~rmk/linux-arm zii
head:   22f6fd6865d54d3632278e7f17bad52308e50311
commit: b36d94695f6930a807fb5a6ed3dff972b9ea8c71 [183/199] net: mtk_eth_soc: move MAC_MCR setting to mac_finish()
config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20220313/202203130106.mIhChrsp-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 43f668b98e8d87290fc6bbf5ed13c3ab542e3497)
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 arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        git remote add rmk-arm git://git.armlinux.org.uk/~rmk/linux-arm
        git fetch --no-tags rmk-arm zii
        git checkout b36d94695f6930a807fb5a6ed3dff972b9ea8c71
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/net/ethernet/mediatek/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

>> drivers/net/ethernet/mediatek/mtk_eth_soc.c:378:1: error: non-void function does not return a value [-Werror,-Wreturn-type]
   }
   ^
   1 error generated.


vim +378 drivers/net/ethernet/mediatek/mtk_eth_soc.c

   361	
   362	static int mtk_mac_finish(struct phylink_config *config, unsigned int mode,
   363				  phy_interface_t interface)
   364	{
   365		struct mtk_mac *mac = container_of(config, struct mtk_mac,
   366						   phylink_config);
   367		u32 mcr_cur, mcr_new;
   368	
   369		/* Setup gmac */
   370		mcr_cur = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id));
   371		mcr_new = mcr_cur;
   372		mcr_new |= MAC_MCR_IPG_CFG | MAC_MCR_FORCE_MODE |
   373			   MAC_MCR_BACKOFF_EN | MAC_MCR_BACKPR_EN | MAC_MCR_FORCE_LINK;
   374	
   375		/* Only update control register when needed! */
   376		if (mcr_new != mcr_cur)
   377			mtk_w32(mac->hw, mcr_new, MTK_MAC_MCR(mac->id));
 > 378	}
   379	

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