At Mon, 17 Nov 2014 08:39:33 +0100, Johan Rastén wrote:

Specified in section 5.2.5.6.1 of the USB Audio Class 2.0 definition.

Solves the following error for C-Media 6632A (Asus Xonar U7): [ 8219.676164] cannot get ctl value: req = 0x81, wValue = 0x0, wIndex = 0x1400, type = 3

Signed-off-by: Johan Rastén johan@oljud.se

Thanks, applied.

Takashi

---

sound/usb/mixer.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c index 14e1455..c6209ce 100644 --- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -2032,10 +2032,11 @@ static int parse_audio_selector_unit(struct mixer_build *state, int unitid, cval->res = 1; cval->initialized = 1;

• if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR)

• cval->control = UAC2_CX_CLOCK_SELECTOR;
  

• else

• if (state->mixer->protocol == UAC_VERSION_1) cval->control = 0;

• else /* UAC_VERSION_2 */

• cval->control = (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR) ?
  

• 	UAC2_CX_CLOCK_SELECTOR : UAC2_SU_SELECTOR;
  
  

  namelist = kmalloc(sizeof(char *) * desc->bNrInPins, GFP_KERNEL); if (!namelist) {

-- 2.1.0

---

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