commit 7ebb605d22 upstream.
If kstrtou8() fails, the mutex_unlock() is missed, move kstrtou8()
before mutex_lock() to fix it up.
Fixes: 0525210c98 ("usb: gadget: uvc: Allow definition of XUs in configfs")
Fixes: b3c839bd8a ("usb: gadget: uvc: Make bSourceID read/write")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20230213070926.776447-1-yangyingliang@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
cc4b55a48f