set_input_gain    179 sound/pci/echoaudio/gina20_dsp.c static int set_input_gain(struct echoaudio *chip, u16 input, int gain)
set_input_gain    255 sound/pci/echoaudio/layla20_dsp.c static int set_input_gain(struct echoaudio *chip, u16 input, int gain)