Hi Andrew,

url:    
https://github.com/0day-ci/linux/commits/Andrew-Jeffery/hwmon-pmbus-Expose-PEC-debugfs-attribute/20200910-010642
base:   
https://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git 
hwmon-next
config: x86_64-randconfig-m001-20200909 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <[email protected]>
Reported-by: Dan Carpenter <[email protected]>

smatch warnings:
drivers/hwmon/pmbus/pmbus_core.c:2415 pmbus_debugfs_ops_pec_open() warn: '0x' 
prefix is confusing together with '%1llu' specifier

# 
https://github.com/0day-ci/linux/commit/705b8b5588d4102256d0954086ed16c9bdf9804f
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review 
Andrew-Jeffery/hwmon-pmbus-Expose-PEC-debugfs-attribute/20200910-010642
git checkout 705b8b5588d4102256d0954086ed16c9bdf9804f
vim +2415 drivers/hwmon/pmbus/pmbus_core.c

705b8b5588d410 Andrew Jeffery 2020-09-09  2391  static int 
pmbus_debugfs_set_pec(void *data, u64 val)
705b8b5588d410 Andrew Jeffery 2020-09-09  2392  {
705b8b5588d410 Andrew Jeffery 2020-09-09  2393          int rc;
705b8b5588d410 Andrew Jeffery 2020-09-09  2394          struct i2c_client 
*client = data;
705b8b5588d410 Andrew Jeffery 2020-09-09  2395  
705b8b5588d410 Andrew Jeffery 2020-09-09  2396          if (!val) {
705b8b5588d410 Andrew Jeffery 2020-09-09  2397                  client->flags 
&= ~I2C_CLIENT_PEC;
705b8b5588d410 Andrew Jeffery 2020-09-09  2398                  return 0;
705b8b5588d410 Andrew Jeffery 2020-09-09  2399          }
705b8b5588d410 Andrew Jeffery 2020-09-09  2400  
705b8b5588d410 Andrew Jeffery 2020-09-09  2401          if (val != 1)
705b8b5588d410 Andrew Jeffery 2020-09-09  2402                  return -EINVAL;
705b8b5588d410 Andrew Jeffery 2020-09-09  2403  
705b8b5588d410 Andrew Jeffery 2020-09-09  2404          rc = 
i2c_smbus_read_byte_data(client, PMBUS_CAPABILITY);
705b8b5588d410 Andrew Jeffery 2020-09-09  2405          if (rc < 0)
705b8b5588d410 Andrew Jeffery 2020-09-09  2406                  return rc;
705b8b5588d410 Andrew Jeffery 2020-09-09  2407  
705b8b5588d410 Andrew Jeffery 2020-09-09  2408          if (!(rc & 
PB_CAPABILITY_ERROR_CHECK))
705b8b5588d410 Andrew Jeffery 2020-09-09  2409                  return 
-ENOTSUPP;
705b8b5588d410 Andrew Jeffery 2020-09-09  2410  
705b8b5588d410 Andrew Jeffery 2020-09-09  2411          client->flags |= 
I2C_CLIENT_PEC;
705b8b5588d410 Andrew Jeffery 2020-09-09  2412  
705b8b5588d410 Andrew Jeffery 2020-09-09  2413          return 0;
705b8b5588d410 Andrew Jeffery 2020-09-09  2414  }
705b8b5588d410 Andrew Jeffery 2020-09-09 @2415  
DEFINE_DEBUGFS_ATTRIBUTE(pmbus_debugfs_ops_pec, pmbus_debugfs_get_pec,
705b8b5588d410 Andrew Jeffery 2020-09-09  2416                           
pmbus_debugfs_set_pec, "0x%1llu\n");
                                                                                
                 ^^^^^^^
Was the 1 intentional?  Anyway, you probably want to remove the 0x so
it doesn't look like hex.

705b8b5588d410 Andrew Jeffery 2020-09-09  2417  

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/[email protected]

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