Re: [PATCH v1 2/2] i2c: Introduce i2c_str_read_write() and make use of it

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Hi Andy,

I love your patch! Yet something to improve:

[auto build test ERROR on wsa/i2c/for-next]
[also build test ERROR on linus/master v5.19-rc4 next-20220701]
[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/intel-lab-lkp/linux/commits/Andy-Shevchenko/lib-string_helpers-Add-str_read_write-helper/20220702-215944
base:   https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git i2c/for-next
config: arc-randconfig-r043-20220702 (https://download.01.org/0day-ci/archive/20220703/202207030039.I3q472GJ-lkp@xxxxxxxxx/config)
compiler: arc-elf-gcc (GCC) 11.3.0
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/intel-lab-lkp/linux/commit/c9ef15ef6b2b2b51d33d68a8b92beb05771cc8c2
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Andy-Shevchenko/lib-string_helpers-Add-str_read_write-helper/20220702-215944
        git checkout c9ef15ef6b2b2b51d33d68a8b92beb05771cc8c2
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=arc SHELL=/bin/bash drivers/i2c/busses/

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

All errors (new ones prefixed by >>):

   drivers/i2c/busses/i2c-exynos5.c: In function 'exynos5_i2c_xfer_msg':
>> drivers/i2c/busses/i2c-exynos5.c:960:26: error: unterminated argument list invoking macro "dev_warn"
     960 | MODULE_LICENSE("GPL v2");
         |                          ^
>> drivers/i2c/busses/i2c-exynos5.c:747:25: error: 'dev_warn' undeclared (first use in this function); did you mean '_dev_warn'?
     747 |                         dev_warn(i2c->dev, "%s timeout\n", i2c_str_read_write(msgs);
         |                         ^~~~~~~~
         |                         _dev_warn
   drivers/i2c/busses/i2c-exynos5.c:747:25: note: each undeclared identifier is reported only once for each function it appears in
>> drivers/i2c/busses/i2c-exynos5.c:747:33: error: expected ';' at end of input
     747 |                         dev_warn(i2c->dev, "%s timeout\n", i2c_str_read_write(msgs);
         |                                 ^
         |                                 ;
   ......
   drivers/i2c/busses/i2c-exynos5.c:746:17: note: '-Wmisleading-indentation' is disabled from this point onwards, since column-tracking was disabled due to the size of the code/headers
     746 |                 if (ret == -ETIMEDOUT)
         |                 ^~
   drivers/i2c/busses/i2c-exynos5.c:746:17: note: adding '-flarge-source-files' will allow for more column-tracking support, at the expense of compilation time and memory
>> drivers/i2c/busses/i2c-exynos5.c:747:25: error: expected declaration or statement at end of input
     747 |                         dev_warn(i2c->dev, "%s timeout\n", i2c_str_read_write(msgs);
         |                         ^~~~~~~~
>> drivers/i2c/busses/i2c-exynos5.c:747:25: error: expected declaration or statement at end of input
   drivers/i2c/busses/i2c-exynos5.c:747:25: error: no return statement in function returning non-void [-Werror=return-type]
   At top level:
   drivers/i2c/busses/i2c-exynos5.c:716:12: warning: 'exynos5_i2c_xfer_msg' defined but not used [-Wunused-function]
     716 | static int exynos5_i2c_xfer_msg(struct exynos5_i2c *i2c,
         |            ^~~~~~~~~~~~~~~~~~~~
   drivers/i2c/busses/i2c-exynos5.c:445:20: warning: 'exynos5_i2c_irq' defined but not used [-Wunused-function]
     445 | static irqreturn_t exynos5_i2c_irq(int irqno, void *dev_id)
         |                    ^~~~~~~~~~~~~~~
   drivers/i2c/busses/i2c-exynos5.c:240:34: warning: 'exynos5_i2c_match' defined but not used [-Wunused-const-variable=]
     240 | static const struct of_device_id exynos5_i2c_match[] = {
         |                                  ^~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/dev_warn +960 drivers/i2c/busses/i2c-exynos5.c

8a73cd4cfa1599 Naveen Krishna Ch 2013-10-16  956  
8a73cd4cfa1599 Naveen Krishna Ch 2013-10-16  957  MODULE_DESCRIPTION("Exynos5 HS-I2C Bus driver");
d790eeb3db6aef Jean Delvare      2020-06-11  958  MODULE_AUTHOR("Naveen Krishna Chatradhi <ch.naveen@xxxxxxxxxxx>");
d790eeb3db6aef Jean Delvare      2020-06-11  959  MODULE_AUTHOR("Taekgyun Ko <taeggyun.ko@xxxxxxxxxxx>");
8a73cd4cfa1599 Naveen Krishna Ch 2013-10-16 @960  MODULE_LICENSE("GPL v2");

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp



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