Re: [PATCH v2 11/15] ASoC: Intel: avs: Machine board registration

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On 5/9/2022 1:58 PM, kernel test robot wrote:
Hi Cezary,

I love your patch! Perhaps something to improve:

[auto build test WARNING on broonie-sound/for-next]
[also build test WARNING on next-20220506]
[cannot apply to tiwai-sound/for-next v5.18-rc6]
[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/Cezary-Rojewski/ASoC-Intel-avs-Driver-core-and-PCM-operations/20220509-165656
base:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next
config: arc-allyesconfig (https://download.01.org/0day-ci/archive/20220509/202205091954.7hT2TBhd-lkp@xxxxxxxxx/config)
compiler: arceb-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/2ef25400a7aee5a8e75c2ccdb5618be31c9f6809
         git remote add linux-review https://github.com/intel-lab-lkp/linux
         git fetch --no-tags linux-review Cezary-Rojewski/ASoC-Intel-avs-Driver-core-and-PCM-operations/20220509-165656
         git checkout 2ef25400a7aee5a8e75c2ccdb5618be31c9f6809
         # 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 sound/soc/intel/avs/

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

All warnings (new ones prefixed by >>):

    In file included from include/linux/device.h:15,
                     from include/linux/acpi.h:15,
                     from sound/soc/intel/avs/board_selection.c:9:
    sound/soc/intel/avs/board_selection.c: In function 'avs_register_i2s_board':
sound/soc/intel/avs/board_selection.c:328:36: warning: format '%ld' expects argument of type 'long int', but argument 5 has type 'int' [-Wformat=]
      328 |                 dev_err(adev->dev, "Platform supports %d SSPs but board %s requires SSP%ld\n",
          |                                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    include/linux/dev_printk.h:110:30: note: in definition of macro 'dev_printk_index_wrap'
      110 |                 _p_func(dev, fmt, ##__VA_ARGS__);                       \
          |                              ^~~
    include/linux/dev_printk.h:144:56: note: in expansion of macro 'dev_fmt'
      144 |         dev_printk_index_wrap(_dev_err, KERN_ERR, dev, dev_fmt(fmt), ##__VA_ARGS__)
          |                                                        ^~~~~~~
    sound/soc/intel/avs/board_selection.c:328:17: note: in expansion of macro 'dev_err'
      328 |                 dev_err(adev->dev, "Platform supports %d SSPs but board %s requires SSP%ld\n",
          |                 ^~~~~~~
    sound/soc/intel/avs/board_selection.c:328:90: note: format string is defined here
      328 |                 dev_err(adev->dev, "Platform supports %d SSPs but board %s requires SSP%ld\n",
          |                                                                                        ~~^
          |                                                                                          |
          |                                                                                          long int
          |                                                                                        %d


vim +328 sound/soc/intel/avs/board_selection.c

    318	
    319	static int avs_register_i2s_board(struct avs_dev *adev, struct snd_soc_acpi_mach *mach)
    320	{
    321		struct platform_device *board;
    322		int num_ssps;
    323		char *name;
    324		int ret;
    325	
    326		num_ssps = adev->hw_cfg.i2s_caps.ctrl_count;
    327		if (fls(mach->mach_params.i2s_link_mask) > num_ssps) {
  > 328			dev_err(adev->dev, "Platform supports %d SSPs but board %s requires SSP%ld\n",
    329				num_ssps, mach->drv_name, __fls(mach->mach_params.i2s_link_mask));
    330			return -ENODEV;
    331		}
    332	
    333		name = devm_kasprintf(adev->dev, GFP_KERNEL, "%s.%d-platform", mach->drv_name,
    334				      mach->mach_params.i2s_link_mask);
    335		if (!name)
    336			return -ENOMEM;
    337	
    338		ret = avs_i2s_platform_register(adev, name, mach->mach_params.i2s_link_mask, mach->pdata);
    339		if (ret < 0)
    340			return ret;
    341	
    342		mach->mach_params.platform = name;
    343	
    344		board = platform_device_register_data(NULL, mach->drv_name, mach->mach_params.i2s_link_mask,
    345						      (const void *)mach, sizeof(*mach));
    346		if (IS_ERR(board)) {
    347			dev_err(adev->dev, "ssp board register failed\n");
    348			return PTR_ERR(board);
    349		}
    350	
    351		ret = devm_add_action(adev->dev, board_pdev_unregister, board);
    352		if (ret < 0) {
    353			platform_device_unregister(board);
    354			return ret;
    355		}
    356	
    357		return 0;
    358	}
    359	


Kernel test robot warns us about __fls and it is right, as __fls depending on architecture returns either unsigned int or unsigned long. But I would say that this seems questionable, as I would expect consistent return value between arches, especially for functions where we operate on bits and probably don't want inconsistent results.

Generic asm header [1] seems to suggest that it should accept unsigned long as parameter and return unsigned long. It seems however that arc accepts unsigned long as argument and returns int, while m68k uses int for argument and return value...

Adding relevant architecture maintainers to CC.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/asm-generic/bitops/__fls.h



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