Hi Jean, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on net/master] [also build test WARNING on ipvs/master linus/master v5.10-rc5] [cannot apply to net-next/master next-20201127] [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/Jean-Pihet/net-dsa-ksz-pad-frame-to-64-bytes-for-transmission/20201129-182750 base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git 4d521943f76bd0d1e68ea5e02df7aadd30b2838a config: x86_64-allyesconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/5a255bc7fbe20060c6f86dfaa0bbe9fbcd024128 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Jean-Pihet/net-dsa-ksz-pad-frame-to-64-bytes-for-transmission/20201129-182750 git checkout 5a255bc7fbe20060c6f86dfaa0bbe9fbcd024128 # save the attached .config to linux build tree make W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): >> drivers/net/dsa/microchip/ksz8795.c:1114:6: warning: no previous prototype for 'ksz8795_adjust_link' [-Wmissing-prototypes] 1114 | void ksz8795_adjust_link(struct dsa_switch *ds, int port, | ^~~~~~~~~~~~~~~~~~~ vim +/ksz8795_adjust_link +1114 drivers/net/dsa/microchip/ksz8795.c 1113 > 1114 void ksz8795_adjust_link(struct dsa_switch *ds, int port, 1115 struct phy_device *phydev) 1116 { 1117 struct ksz_device *dev = ds->priv; 1118 struct ksz_port *p = &dev->ports[port]; 1119 1120 /* Adjust the link interface mode and speed for the CPU port */ 1121 if (port == dev->cpu_port) 1122 ksz8795_mii_config(dev, p); 1123 } 1124 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org