Jack Pham wrote:

Hi Thinh,

On Sat, Aug 21, 2021 at 02:57:07AM +0000, Thinh Nguyen wrote:

quoted

I took a look at 24f779dac8f3 ("usb: gadget: f_uac2/u_audio: add
feedback endpoint support") that Ferry reported the issue from
bisection. I see at least a couple problems in the new UAC2 changes.

1) usb_ep_dequeue() is asynchronous. Don't free requests before the
controller driver give them back.

2) Did you test with SuperSpeed? I don't see companion descriptor.

We caught this too when testing f_uac2 in SuperSpeed mode.  I can
prepare a patch.

Thanks for the test and the fix.

BR,
Thinh