STR_FEAT_DESC_0 222 drivers/usb/gadget/function/f_uac1_legacy.c [STR_FEAT_DESC_0].s = "Volume control & mute", STR_FEAT_DESC_0 722 drivers/usb/gadget/function/f_uac1_legacy.c feature_unit_desc.iFeature = us[STR_FEAT_DESC_0].id;