linux-kernel - [PATCH v3] usb: gadget: f_uac2: fix superspeed transfer

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Message-ID: <258cfffe.b20d3.17f064d6977.Coremail.3090101217@zju.edu.cn>
Date:   Thu, 17 Feb 2022 14:10:10 +0800 (GMT+08:00)
From:   "Jing Leng" <3090101217@....edu.cn>
To:     gregkh@...uxfoundation.org
Cc:     linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        "Jing Leng" <jleng@...arella.com>, ruslan.bilovol@...il.com,
        jbrunet@...libre.com, pavel.hofman@...tera.com, pawell@...ence.com,
        jackp@...eaurora.org, balbi@...nel.org, colin.king@...el.com
Subject: [PATCH v3] usb: gadget: f_uac2: fix superspeed transfer

Hi Greg KH,

1. Old version kernel can support superspeed transfer, the problem
was introduced by the following modification:
 commit eaf6cbe0992052a46d93047dc122fad5126aa3bd
 Author: Ruslan Bilovol <ruslan.bilovol@...il.com>
 Date:   Mon Jul 12 14:55:28 2021 +0200

     usb: gadget: f_uac2: add volume and mute support

2. Only ss_ep_int_desc endpoint doesn't have 'SuperSpeed Endpoint
Companion Descriptor' followed (All other endpoints have it).

So it is a bugfix rather than a feature.

Thanks,
Jing Leng