tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: fd0aa1a4567d0f09e1bfe367a950b004f99ac290 commit: 957ff4278e0db34f56c2bc121fdd6393e4523ef2 ptp: ptp_clockmatrix: use i2c_master_send for i2c write date: 10 months ago config: riscv-randconfig-r036-20210618 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 64720f57bea6a6bf033feef4a5751ab9c0c3b401) 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 riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=957ff4278e0db34f56c2bc121fdd6393e4523ef2 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 957ff4278e0db34f56c2bc121fdd6393e4523ef2 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): >> drivers/ptp/ptp_clockmatrix.c:2089:12: warning: stack frame size of 17952 bytes in function 'idtcm_probe' [-Wframe-larger-than=] static int idtcm_probe(struct i2c_client *client, ^ >> drivers/ptp/ptp_clockmatrix.c:703:12: warning: stack frame size of 11328 bytes in function '_idtcm_settime' [-Wframe-larger-than=] static int _idtcm_settime(struct idtcm_channel *channel, ^ 2 warnings generated. vim +/idtcm_probe +2089 drivers/ptp/ptp_clockmatrix.c 3a6ba7dc779935 Vincent Cheng 2019-10-31 2088 3a6ba7dc779935 Vincent Cheng 2019-10-31 @2089 static int idtcm_probe(struct i2c_client *client, 3a6ba7dc779935 Vincent Cheng 2019-10-31 2090 const struct i2c_device_id *id) 3a6ba7dc779935 Vincent Cheng 2019-10-31 2091 { 3a6ba7dc779935 Vincent Cheng 2019-10-31 2092 struct idtcm *idtcm; 3a6ba7dc779935 Vincent Cheng 2019-10-31 2093 int err; 3a6ba7dc779935 Vincent Cheng 2019-10-31 2094 u8 i; 7ea5fda2b1325e Min Li 2020-07-28 2095 char *fmt = "Failed at %d in line %s with channel output %d!\n"; 3a6ba7dc779935 Vincent Cheng 2019-10-31 2096 3a6ba7dc779935 Vincent Cheng 2019-10-31 2097 /* Unused for now */ 3a6ba7dc779935 Vincent Cheng 2019-10-31 2098 (void)id; 3a6ba7dc779935 Vincent Cheng 2019-10-31 2099 3a6ba7dc779935 Vincent Cheng 2019-10-31 2100 idtcm = devm_kzalloc(&client->dev, sizeof(struct idtcm), GFP_KERNEL); 3a6ba7dc779935 Vincent Cheng 2019-10-31 2101 3a6ba7dc779935 Vincent Cheng 2019-10-31 2102 if (!idtcm) 3a6ba7dc779935 Vincent Cheng 2019-10-31 2103 return -ENOMEM; 3a6ba7dc779935 Vincent Cheng 2019-10-31 2104 3a6ba7dc779935 Vincent Cheng 2019-10-31 2105 idtcm->client = client; 3a6ba7dc779935 Vincent Cheng 2019-10-31 2106 idtcm->page_offset = 0xff; 3a6ba7dc779935 Vincent Cheng 2019-10-31 2107 idtcm->calculate_overhead_flag = 0; 3a6ba7dc779935 Vincent Cheng 2019-10-31 2108 3a6ba7dc779935 Vincent Cheng 2019-10-31 2109 set_default_masks(idtcm); 3a6ba7dc779935 Vincent Cheng 2019-10-31 2110 3a6ba7dc779935 Vincent Cheng 2019-10-31 2111 mutex_init(&idtcm->reg_lock); 3a6ba7dc779935 Vincent Cheng 2019-10-31 2112 mutex_lock(&idtcm->reg_lock); 3a6ba7dc779935 Vincent Cheng 2019-10-31 2113 3a6ba7dc779935 Vincent Cheng 2019-10-31 2114 idtcm_display_version_info(idtcm); 3a6ba7dc779935 Vincent Cheng 2019-10-31 2115 3a6ba7dc779935 Vincent Cheng 2019-10-31 2116 err = idtcm_load_firmware(idtcm, &client->dev); 3a6ba7dc779935 Vincent Cheng 2019-10-31 2117 3a6ba7dc779935 Vincent Cheng 2019-10-31 2118 if (err) 3a6ba7dc779935 Vincent Cheng 2019-10-31 2119 dev_warn(&idtcm->client->dev, 3a6ba7dc779935 Vincent Cheng 2019-10-31 2120 "loading firmware failed with %d\n", err); 3a6ba7dc779935 Vincent Cheng 2019-10-31 2121 7ea5fda2b1325e Min Li 2020-07-28 2122 if (idtcm->tod_mask) { 7ea5fda2b1325e Min Li 2020-07-28 2123 for (i = 0; i < MAX_TOD; i++) { 7ea5fda2b1325e Min Li 2020-07-28 2124 if (idtcm->tod_mask & (1 << i)) { 3a6ba7dc779935 Vincent Cheng 2019-10-31 2125 err = idtcm_enable_channel(idtcm, i); 7ea5fda2b1325e Min Li 2020-07-28 2126 if (err) { 7ea5fda2b1325e Min Li 2020-07-28 2127 dev_err(&idtcm->client->dev, 7ea5fda2b1325e Min Li 2020-07-28 2128 fmt, 7ea5fda2b1325e Min Li 2020-07-28 2129 __LINE__, 7ea5fda2b1325e Min Li 2020-07-28 2130 __func__, 7ea5fda2b1325e Min Li 2020-07-28 2131 i); 3a6ba7dc779935 Vincent Cheng 2019-10-31 2132 break; 3a6ba7dc779935 Vincent Cheng 2019-10-31 2133 } 3a6ba7dc779935 Vincent Cheng 2019-10-31 2134 } 7ea5fda2b1325e Min Li 2020-07-28 2135 } 3a6ba7dc779935 Vincent Cheng 2019-10-31 2136 } else { 3a6ba7dc779935 Vincent Cheng 2019-10-31 2137 dev_err(&idtcm->client->dev, 3a6ba7dc779935 Vincent Cheng 2019-10-31 2138 "no PLLs flagged as PHCs, nothing to do\n"); 3a6ba7dc779935 Vincent Cheng 2019-10-31 2139 err = -ENODEV; 3a6ba7dc779935 Vincent Cheng 2019-10-31 2140 } 3a6ba7dc779935 Vincent Cheng 2019-10-31 2141 3a6ba7dc779935 Vincent Cheng 2019-10-31 2142 mutex_unlock(&idtcm->reg_lock); 3a6ba7dc779935 Vincent Cheng 2019-10-31 2143 3a6ba7dc779935 Vincent Cheng 2019-10-31 2144 if (err) { 3a6ba7dc779935 Vincent Cheng 2019-10-31 2145 ptp_clock_unregister_all(idtcm); 3a6ba7dc779935 Vincent Cheng 2019-10-31 2146 return err; 3a6ba7dc779935 Vincent Cheng 2019-10-31 2147 } 3a6ba7dc779935 Vincent Cheng 2019-10-31 2148 3a6ba7dc779935 Vincent Cheng 2019-10-31 2149 i2c_set_clientdata(client, idtcm); 3a6ba7dc779935 Vincent Cheng 2019-10-31 2150 3a6ba7dc779935 Vincent Cheng 2019-10-31 2151 return 0; 3a6ba7dc779935 Vincent Cheng 2019-10-31 2152 } 3a6ba7dc779935 Vincent Cheng 2019-10-31 2153 :::::: The code at line 2089 was first introduced by commit :::::: 3a6ba7dc7799355557938fbdc15a558236011429 ptp: Add a ptp clock driver for IDT ClockMatrix. :::::: TO: Vincent Cheng :::::: CC: David S. Miller --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org