tree: https://github.com/0day-ci/linux/commits/min-li-xe-renesas-com/ptp-clockm... head: cffaee07726f4bfb624fff0f4a35e0102026bf6f commit: cffaee07726f4bfb624fff0f4a35e0102026bf6f ptp: clockmatrix: use rsmu driver to access i2c/spi bus date: 7 weeks ago config: i386-randconfig-a011-20210928 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/cffaee07726f4bfb624fff0f4a35e0102... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review min-li-xe-renesas-com/ptp-clockmatrix-use-rsmu-driver-to-access-i2c-spi-bus/20210922-152050 git checkout cffaee07726f4bfb624fff0f4a35e0102026bf6f # save the attached .config to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): ld: drivers/ptp/ptp_clockmatrix.o: in function `idtcm_get_dco_delay': vim +2179 drivers/ptp/ptp_clockmatrix.c 2148 2149 /* 2150 * Compensate for the PTP DCO input-to-output delay. 2151 * This delay is 18 FOD cycles. 2152 */ 2153 static u32 idtcm_get_dco_delay(struct idtcm_channel *channel) 2154 { 2155 struct idtcm *idtcm = channel->idtcm; 2156 u8 mbuf[8] = {0}; 2157 u8 nbuf[2] = {0}; 2158 u32 fodFreq; 2159 int err; 2160 u64 m; 2161 u16 n; 2162 2163 err = idtcm_read(idtcm, channel->dpll_ctrl_n, 2164 DPLL_CTRL_DPLL_FOD_FREQ, mbuf, 6); 2165 if (err) 2166 return 0; 2167 2168 err = idtcm_read(idtcm, channel->dpll_ctrl_n, 2169 DPLL_CTRL_DPLL_FOD_FREQ + 6, nbuf, 2); 2170 if (err) 2171 return 0; 2172 2173 m = get_unaligned_le64(mbuf); 2174 n = get_unaligned_le16(nbuf); 2175 2176 if (n == 0) 2177 n = 1; 2178 2180 2181 if (fodFreq >= 500000000) 2183 2184 return 0; 2185 } 2186 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org