Currently afunc_bind sets std_ac_if_desc.bNumEndpoints to 1 if
controls (mute/volume) are enabled. During next afunc_bind call,
bNumEndpoints would be unchanged and incorrectly set to 1 even
if the controls aren't enabled.
Fix this by resetting the value of bNumEndpoints to 0 on every
afunc_bind call.
Fixes: eaf6cbe09920 ("usb: gadget: f_uac2: add volume and mute support")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Prashanth K <quic_prashk@xxxxxxxxxxx>
---
drivers/usb/gadget/function/f_uac2.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/usb/gadget/function/f_uac2.c b/drivers/usb/gadget/function/f_uac2.c
index ce5b77f89190..9b324821c93b 100644
--- a/drivers/usb/gadget/function/f_uac2.c
+++ b/drivers/usb/gadget/function/f_uac2.c
@@ -1185,6 +1185,7 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
uac2->as_in_alt = 0;
}
+ std_ac_if_desc.bNumEndpoints = 0;
if (FUOUT_EN(uac2_opts) || FUIN_EN(uac2_opts)) {
uac2->int_ep = usb_ep_autoconfig(gadget, &fs_ep_int_desc);
if (!uac2->int_ep) {
--
2.25.1
