Hi Wesley,

[FYI, it's a private test report for your RFC patch.]
[auto build test ERROR on broonie-sound/for-next]
[also build test ERROR on tiwai-sound/for-next tiwai-sound/for-linus usb/usb-testing usb/usb-next usb/usb-linus linus/master v6.1 next-20221220]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Wesley-Cheng/ASoC-Add-SOC-USB-APIs-for-adding-an-USB-backend/20221224-073625
base:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next
patch link:    https://lore.kernel.org/r/20221223233200.26089-12-quic_wcheng%40quicinc.com
patch subject: [RFC PATCH 11/14] sound: soc: soc-usb: Add PCM format check API for USB backend
config: x86_64-randconfig-a001-20221219
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/5a4ba2c45432c1dd298fe6762f3ae19eff624a17
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Wesley-Cheng/ASoC-Add-SOC-USB-APIs-for-adding-an-USB-backend/20221224-073625
        git checkout 5a4ba2c45432c1dd298fe6762f3ae19eff624a17
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 olddefconfig
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

   ld: vmlinux.o: in function `snd_soc_usb_find_format':
>> sound/soc/soc-usb.c:33: undefined reference to `snd_usb_find_suppported_substream'


vim +33 sound/soc/soc-usb.c

    27	
    28	int snd_soc_usb_find_format(int card_idx, struct snd_pcm_hw_params *params,
    29				int direction)
    30	{
    31		struct snd_usb_stream *as;
    32	
  > 33		as = snd_usb_find_suppported_substream(card_idx, params, direction);
    34		if (!as)
    35			return -EOPNOTSUPP;
    36	
    37		return 0;
    38	}
    39	EXPORT_SYMBOL_GPL(snd_soc_usb_find_format);
    40	

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https://01.org/lkp