linux-kernel - 5.16.0-rc7+ Bluetooth error

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Message-ID: <02077a37-46d6-c94f-fa08-9da7ee99e42c@googlemail.com>
Date:   Thu, 30 Dec 2021 09:21:39 +0000
From:   Chris Clayton <chris2553@...glemail.com>
To:     LKML <linux-kernel@...r.kernel.org>,
        "linux-bluetooth@...r.kernel.org" <linux-bluetooth@...r.kernel.org>
Subject: 5.16.0-rc7+ Bluetooth error

Hi,

I pulled the latest changes into my clone of Linus' tree and built and installed the kernel. (git describe gives
v5.16-rc7-9-ge7c124bd0463). I'm seeing errors reported by the bluetooth subsystem that i don't see in 5.15.12 or 5.10.89

The problem seems to occur twice during system startup and on each occasion I see a batch of identical error messages:

[    3.980822] Bluetooth: hci0: Failed to read codec capabilities (-56)
[    3.982812] Bluetooth: hci0: Failed to read codec capabilities (-56)
[    3.984812] Bluetooth: hci0: Failed to read codec capabilities (-56)
[    3.986608] Bluetooth: hci0: Failed to read codec capabilities (-56)
[    3.987621] Bluetooth: hci0: Failed to read codec capabilities (-56)
[    3.988606] Bluetooth: hci0: Failed to read codec capabilities (-56)
[    3.989650] Bluetooth: hci0: Failed to read codec capabilities (-56)

A full dmesg log is attached. I've also attached Two files containing the output from "lsusb -v" run on 5.10.89 and
5.16-rc7.

Please let me know if I can provide any other diagnostic information or test any patches. You'll need to cc me on
replies because I'm not subscribed to LKML or linux-bluetooth.

Thanks

View attachment "BT-error.dmesg.txt" of type "text/plain" (57699 bytes)

View attachment "lsusb-v_5.10.89.txt" of type "text/plain" (44273 bytes)

View attachment "lsusb-v_5.16-rc7+.txt" of type "text/plain" (44134 bytes)