ALSA: usb - Don't create "Speaker" mixer controls on headphones and headsets

	return strlcat(kctl->id.name, str, sizeof(kctl->id.name));

}

/* A lot of headsets/headphones have a "Speaker" mixer. Make sure we

   rename it to "Headphone". We determine if something is a headphone

   similar to how udev determines form factor. */

static void check_no_speaker_on_headset(struct snd_kcontrol *kctl,

					struct snd_card *card)

{

	const char *names_to_check[] = {

		"Headset", "headset", "Headphone", "headphone", NULL};

	const char **s;

	bool found = 0;

	if (strcmp("Speaker", kctl->id.name))

		return;

	for (s = names_to_check; *s; s++)

		if (strstr(card->shortname, *s)) {

			found = 1;

			break;

		}

	if (!found)

		return;

	strlcpy(kctl->id.name, "Headphone", sizeof(kctl->id.name));

}

static void build_feature_ctl(struct mixer_build *state, void *raw_desc,

			      unsigned int ctl_mask, int control,

			      struct usb_audio_term *iterm, int unitid,

				len = snprintf(kctl->id.name, sizeof(kctl->id.name),

					       "Feature %d", unitid);

		}

		if (!mapped_name)

			check_no_speaker_on_headset(kctl, state->mixer->chip->card);

		/* determine the stream direction:

		 * if the connected output is USB stream, then it's likely a

		 * capture stream.  otherwise it should be playback (hopefully :)