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Subjectdrivers/ptp/ptp_clockmatrix.c:107: undefined reference to `i2c_transfer'
tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 6794862a16ef41f753abd75c03a152836e4c8028
commit: 3a6ba7dc7799355557938fbdc15a558236011429 ptp: Add a ptp clock driver for IDT ClockMatrix.
date: 5 weeks ago
config: i386-randconfig-b001-20191211 (attached as .config)
compiler: gcc-7 (Debian 7.5.0-1) 7.5.0
reproduce:
git checkout 3a6ba7dc7799355557938fbdc15a558236011429
# save the attached .config to linux build tree
make ARCH=i386

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

ld: drivers/ptp/ptp_clockmatrix.o: in function `idtcm_xfer':
>> drivers/ptp/ptp_clockmatrix.c:107: undefined reference to `i2c_transfer'
ld: drivers/ptp/ptp_clockmatrix.o: in function `idtcm_driver_init':
>> drivers/ptp/ptp_clockmatrix.c:1425: undefined reference to `i2c_register_driver'
ld: drivers/ptp/ptp_clockmatrix.o: in function `idtcm_driver_exit':
>> drivers/ptp/ptp_clockmatrix.c:1425: undefined reference to `i2c_del_driver'

vim +107 drivers/ptp/ptp_clockmatrix.c

86
87 static int idtcm_xfer(struct idtcm *idtcm,
88 u8 regaddr,
89 u8 *buf,
90 u16 count,
91 bool write)
92 {
93 struct i2c_client *client = idtcm->client;
94 struct i2c_msg msg[2];
95 int cnt;
96
97 msg[0].addr = client->addr;
98 msg[0].flags = 0;
99 msg[0].len = 1;
100 msg[0].buf = &regaddr;
101
102 msg[1].addr = client->addr;
103 msg[1].flags = write ? 0 : I2C_M_RD;
104 msg[1].len = count;
105 msg[1].buf = buf;
106
> 107 cnt = i2c_transfer(client->adapter, msg, 2);
108
109 if (cnt < 0) {
110 dev_err(&client->dev, "i2c_transfer returned %d\n", cnt);
111 return cnt;
112 } else if (cnt != 2) {
113 dev_err(&client->dev,
114 "i2c_transfer sent only %d of %d messages\n", cnt, 2);
115 return -EIO;
116 }
117
118 return 0;
119 }
120

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org Intel Corporation
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