linux-kernel - Re: [PATCH v1 3/3] Bluetooth: btusb: Remove HCI_QUIRK_BROKEN_ERR_DATA

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Date:   Wed, 20 Jul 2022 08:38:01 -0700
From:   Luiz Augusto von Dentz <luiz.dentz@...il.com>
To:     Zijun Hu <quic_zijuhu@...cinc.com>
Cc:     Marcel Holtmann <marcel@...tmann.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        David Miller <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Luiz Augusto Von Dentz <luiz.von.dentz@...el.com>,
        swyterzone@...il.com,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "linux-bluetooth@...r.kernel.org" <linux-bluetooth@...r.kernel.org>,
        "open list:NETWORKING [GENERAL]" <netdev@...r.kernel.org>
Subject: Re: [PATCH v1 3/3] Bluetooth: btusb: Remove HCI_QUIRK_BROKEN_ERR_DATA_REPORTING
 for fake CSR

Hi Zijun,

On Wed, Jul 20, 2022 at 7:07 AM Zijun Hu <quic_zijuhu@...cinc.com> wrote:
>
> Fake CSR BT controllers do not enable feature "Erroneous Data Reporting"
> currently, BT core driver will check the feature bit instead of the quirk
> to decide if HCI command HCI_Read|Write_Default_Erroneous_Data_Reporting
> work fine, so remove HCI_QUIRK_BROKEN_ERR_DATA_REPORTING for fake CSR.
>
> Signed-off-by: Zijun Hu <quic_zijuhu@...cinc.com>
> ---
>  drivers/bluetooth/btusb.c | 1 -
>  1 file changed, 1 deletion(-)
>
> diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
> index f0f86c5c3b37..f2b3d31d56cf 100644
> --- a/drivers/bluetooth/btusb.c
> +++ b/drivers/bluetooth/btusb.c
> @@ -2072,7 +2072,6 @@ static int btusb_setup_csr(struct hci_dev *hdev)
>                  * without these the controller will lock up.
>                  */
>                 set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);
> -               set_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks);
>                 set_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks);
>                 set_bit(HCI_QUIRK_NO_SUSPEND_NOTIFIER, &hdev->quirks);

You will probably need to remove HCI_QUIRK_BROKEN_ERR_DATA_REPORTING
last otherwise it breaks the build in between patches, and please
double check if there are no other instances of driver using it or
perhaps leave it defined in case the feature is broken for some reason
but then we need a macro that checks both the quirk and the feature
bit.

> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project
>


-- 
Luiz Augusto von Dentz