[linux-next:master 13138/13397] sound/usb/stream.c:306:13: error: use of undeclared identifier 'chmaps'; did you mean 'chmap'?

[kernel test robot <lkp@intel.com>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   dad309222e4c3fc7f88b20ce725ce1e0eea07cc7
commit: a94566ace3ca789747cd4cb26dd59474d135c7ac [13138/13397] ALSA: usb-audio: Stop parsing channels bits when all channels are found.
config: arm-defconfig (https://download.01.org/0day-ci/archive/20240313/202403132200.X4RzDIwM-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project.git f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240313/202403132200.X4RzDIwM-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202403132200.X4RzDIwM-lkp@intel.com/

Note: the linux-next/master HEAD dad309222e4c3fc7f88b20ce725ce1e0eea07cc7 builds fine.
      It may have been fixed somewhere.

All errors (new ones prefixed by >>):

>> sound/usb/stream.c:306:13: error: use of undeclared identifier 'chmaps'; did you mean 'chmap'?
                           if (c == chmaps->channels)
                                    ^~~~~~
                                    chmap
   sound/usb/stream.c:287:29: note: 'chmap' declared here
           struct snd_pcm_chmap_elem *chmap;
                                      ^
   1 error generated.


vim +306 sound/usb/stream.c

   237	
   238	/* convert from USB ChannelConfig bits to ALSA chmap element */
   239	static struct snd_pcm_chmap_elem *convert_chmap(int channels, unsigned int bits,
   240							int protocol)
   241	{
   242		static const unsigned int uac1_maps[] = {
   243			SNDRV_CHMAP_FL,		/* left front */
   244			SNDRV_CHMAP_FR,		/* right front */
   245			SNDRV_CHMAP_FC,		/* center front */
   246			SNDRV_CHMAP_LFE,	/* LFE */
   247			SNDRV_CHMAP_SL,		/* left surround */
   248			SNDRV_CHMAP_SR,		/* right surround */
   249			SNDRV_CHMAP_FLC,	/* left of center */
   250			SNDRV_CHMAP_FRC,	/* right of center */
   251			SNDRV_CHMAP_RC,		/* surround */
   252			SNDRV_CHMAP_SL,		/* side left */
   253			SNDRV_CHMAP_SR,		/* side right */
   254			SNDRV_CHMAP_TC,		/* top */
   255			0 /* terminator */
   256		};
   257		static const unsigned int uac2_maps[] = {
   258			SNDRV_CHMAP_FL,		/* front left */
   259			SNDRV_CHMAP_FR,		/* front right */
   260			SNDRV_CHMAP_FC,		/* front center */
   261			SNDRV_CHMAP_LFE,	/* LFE */
   262			SNDRV_CHMAP_RL,		/* back left */
   263			SNDRV_CHMAP_RR,		/* back right */
   264			SNDRV_CHMAP_FLC,	/* front left of center */
   265			SNDRV_CHMAP_FRC,	/* front right of center */
   266			SNDRV_CHMAP_RC,		/* back center */
   267			SNDRV_CHMAP_SL,		/* side left */
   268			SNDRV_CHMAP_SR,		/* side right */
   269			SNDRV_CHMAP_TC,		/* top center */
   270			SNDRV_CHMAP_TFL,	/* top front left */
   271			SNDRV_CHMAP_TFC,	/* top front center */
   272			SNDRV_CHMAP_TFR,	/* top front right */
   273			SNDRV_CHMAP_TRL,	/* top back left */
   274			SNDRV_CHMAP_TRC,	/* top back center */
   275			SNDRV_CHMAP_TRR,	/* top back right */
   276			SNDRV_CHMAP_TFLC,	/* top front left of center */
   277			SNDRV_CHMAP_TFRC,	/* top front right of center */
   278			SNDRV_CHMAP_LLFE,	/* left LFE */
   279			SNDRV_CHMAP_RLFE,	/* right LFE */
   280			SNDRV_CHMAP_TSL,	/* top side left */
   281			SNDRV_CHMAP_TSR,	/* top side right */
   282			SNDRV_CHMAP_BC,		/* bottom center */
   283			SNDRV_CHMAP_RLC,	/* back left of center */
   284			SNDRV_CHMAP_RRC,	/* back right of center */
   285			0 /* terminator */
   286		};
   287		struct snd_pcm_chmap_elem *chmap;
   288		const unsigned int *maps;
   289		int c;
   290	
   291		if (channels > ARRAY_SIZE(chmap->map))
   292			return NULL;
   293	
   294		chmap = kzalloc(sizeof(*chmap), GFP_KERNEL);
   295		if (!chmap)
   296			return NULL;
   297	
   298		maps = protocol == UAC_VERSION_2 ? uac2_maps : uac1_maps;
   299		chmap->channels = channels;
   300		c = 0;
   301	
   302		if (bits) {
   303			for (; bits && *maps; maps++, bits >>= 1) {
   304				if (bits & 1)
   305					chmap->map[c++] = *maps;
 > 306				if (c == chmaps->channels)
   307					break;
   308			}
   309		} else {
   310			/* If we're missing wChannelConfig, then guess something
   311			    to make sure the channel map is not skipped entirely */
   312			if (channels == 1)
   313				chmap->map[c++] = SNDRV_CHMAP_MONO;
   314			else
   315				for (; c < channels && *maps; maps++)
   316					chmap->map[c++] = *maps;
   317		}
   318	
   319		for (; c < channels; c++)
   320			chmap->map[c] = SNDRV_CHMAP_UNKNOWN;
   321	
   322		return chmap;
   323	}
   324	

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