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From:   Luiz Augusto von Dentz <luiz.dentz@gmail.com>
Date:   Fri, 31 Dec 2021 11:53:11 -0800
Message-ID: <CABBYNZLc9Pj=LYhL5MUUVkhenHb_xfT59aDDkdk14k7+ojeUzw@mail.gmail.com>
Subject: Re: 5.16.0-rc7+ Bluetooth error
To:     Chris Clayton <chris2553@googlemail.com>
Cc:     LKML <linux-kernel@vger.kernel.org>,
        "linux-bluetooth@vger.kernel.org" <linux-bluetooth@vger.kernel.org>,
        Kiran K <kiran.k@intel.com>
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Hi Chris,

On Fri, Dec 31, 2021 at 2:35 AM Chris Clayton <chris2553@googlemail.com> wrote:
>
> On 30/12/2021 09:21, Chris Clayton wrote:
> > 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)
> >
>
> Sorry, I should have said that despite the above errors, my bluetooth devices still work fine.

Would be great to have the HCI trace (btmon).

@Kiran K Is this to be expected?

>
> > 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


-- 
Luiz Augusto von Dentz