Commit 2fa89458 authored by Pratham Pratap's avatar Pratham Pratap Committed by Greg Kroah-Hartman
Browse files

usb: gadget: f_uac2: Fix incorrect increment of bNumEndpoints 



Currently connect/disconnect of USB cable calls afunc_bind and
eventually increments the bNumEndpoints. Performing multiple
plugin/plugout will increment bNumEndpoints incorrectly, and on
the next plug-in it leads to invalid configuration of descriptor
and hence enumeration fails.

Fix this by resetting the value of bNumEndpoints to 1 on every
afunc_bind call.

Fixes: 40c73b30 ("usb: gadget: f_uac2: add adaptive sync support for capture")
Cc: stable <stable@kernel.org>
Signed-off-by: default avatarPratham Pratap <quic_ppratap@quicinc.com>
Signed-off-by: default avatarPrashanth K <quic_prashk@quicinc.com>
Link: https://lore.kernel.org/r/1674631645-28888-1-git-send-email-quic_prashk@quicinc.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 921deb9d

drivers/usb/gadget/function/f_uac2.c

+1 −0
Original line number Diff line number Diff line
@@ -1142,6 +1142,7 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn) 
		}

		std_as_out_if0_desc.bInterfaceNumber = ret;

		std_as_out_if1_desc.bInterfaceNumber = ret;

		std_as_out_if1_desc.bNumEndpoints = 1;

		uac2->as_out_intf = ret;

		uac2->as_out_alt = 0;