6.6-stable review patch. If anyone has any objections, please let me know.
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From: Prashanth K quic_prashk@quicinc.com
commit 057bd54dfcf68b1f67e6dfc32a47a72e12198495 upstream.
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 stable@kernel.org Signed-off-by: Prashanth K quic_prashk@quicinc.com Link: https://lore.kernel.org/r/20241211115915.159864-1-quic_prashk@quicinc.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/gadget/function/f_uac2.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/usb/gadget/function/f_uac2.c +++ b/drivers/usb/gadget/function/f_uac2.c @@ -1176,6 +1176,7 @@ afunc_bind(struct usb_configuration *cfg 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) {