Re: [PATCH 4/4] iio: imu: add BNO055 serdev driver

[kernel test robot]

Hi Andrea,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on iio/togreg]
[also build test WARNING on robh/for-next linus/master v5.14-rc1 next-20210715]
[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/Andrea-Merello/Add-support-for-Bosch-BNO055-IMU/20210715-222018
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg
config: arc-allyesconfig (attached as .config)
compiler: arceb-elf-gcc (GCC) 10.3.0
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
        # https://github.com/0day-ci/linux/commit/616d1b9a99ec2045cdf6cc827751660a48ccc5d2
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Andrea-Merello/Add-support-for-Bosch-BNO055-IMU/20210715-222018
        git checkout 616d1b9a99ec2045cdf6cc827751660a48ccc5d2
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross ARCH=arc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

>> drivers/iio/imu/bno055/bno055.c:250:5: warning: no previous prototype for 'bno055_calibration_load' [-Wmissing-prototypes]
     250 | int bno055_calibration_load(struct bno055_priv *priv, const struct firmware *fw)
         |     ^~~~~~~~~~~~~~~~~~~~~~~
   drivers/iio/imu/bno055/bno055.c: In function '_bno055_write_raw':
>> drivers/iio/imu/bno055/bno055.c:770:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
     770 |   switch (mask) {
         |   ^~~~~~
   drivers/iio/imu/bno055/bno055.c:774:2: note: here
     774 |  default:
         |  ^~~~~~~


vim +/bno055_calibration_load +250 drivers/iio/imu/bno055/bno055.c

d13cfdff130569 Andrea Merello 2021-07-15  248  
d13cfdff130569 Andrea Merello 2021-07-15  249  /* must be called in configuration mode */
d13cfdff130569 Andrea Merello 2021-07-15 @250  int bno055_calibration_load(struct bno055_priv *priv, const struct firmware *fw)
d13cfdff130569 Andrea Merello 2021-07-15  251  {
d13cfdff130569 Andrea Merello 2021-07-15  252  	int i;
d13cfdff130569 Andrea Merello 2021-07-15  253  	unsigned int tmp;
d13cfdff130569 Andrea Merello 2021-07-15  254  	u8 cal[BNO055_CALDATA_LEN];
d13cfdff130569 Andrea Merello 2021-07-15  255  	int read, tot_read = 0;
d13cfdff130569 Andrea Merello 2021-07-15  256  	int ret = 0;
d13cfdff130569 Andrea Merello 2021-07-15  257  	char *buf = kmalloc(fw->size + 1, GFP_KERNEL);
d13cfdff130569 Andrea Merello 2021-07-15  258  
d13cfdff130569 Andrea Merello 2021-07-15  259  	if (!buf)
d13cfdff130569 Andrea Merello 2021-07-15  260  		return -ENOMEM;
d13cfdff130569 Andrea Merello 2021-07-15  261  
d13cfdff130569 Andrea Merello 2021-07-15  262  	memcpy(buf, fw->data, fw->size);
d13cfdff130569 Andrea Merello 2021-07-15  263  	buf[fw->size] = '\0';
d13cfdff130569 Andrea Merello 2021-07-15  264  	for (i = 0; i < BNO055_CALDATA_LEN; i++) {
d13cfdff130569 Andrea Merello 2021-07-15  265  		ret = sscanf(buf + tot_read, "%x%n",
d13cfdff130569 Andrea Merello 2021-07-15  266  			     &tmp, &read);
d13cfdff130569 Andrea Merello 2021-07-15  267  		if (ret != 1 || tmp > 0xff) {
d13cfdff130569 Andrea Merello 2021-07-15  268  			ret = -EINVAL;
d13cfdff130569 Andrea Merello 2021-07-15  269  			goto exit;
d13cfdff130569 Andrea Merello 2021-07-15  270  		}
d13cfdff130569 Andrea Merello 2021-07-15  271  		cal[i] = tmp;
d13cfdff130569 Andrea Merello 2021-07-15  272  		tot_read += read;
d13cfdff130569 Andrea Merello 2021-07-15  273  	}
d13cfdff130569 Andrea Merello 2021-07-15  274  	dev_dbg(priv->dev, "loading cal data: %*ph", BNO055_CALDATA_LEN, cal);
d13cfdff130569 Andrea Merello 2021-07-15  275  	ret = regmap_bulk_write(priv->regmap, BNO055_CALDATA_START,
d13cfdff130569 Andrea Merello 2021-07-15  276  				cal, BNO055_CALDATA_LEN);
d13cfdff130569 Andrea Merello 2021-07-15  277  exit:
d13cfdff130569 Andrea Merello 2021-07-15  278  	kfree(buf);
d13cfdff130569 Andrea Merello 2021-07-15  279  	return ret;
d13cfdff130569 Andrea Merello 2021-07-15  280  }
d13cfdff130569 Andrea Merello 2021-07-15  281  

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

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