linux-kernel - Re: [PATCH] [v2] Bluetooth: btusb: Fix a unspported condition to set debug features

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Message-ID: <CAHFy419+zJG0KhS7TwD_JTV2YNJum=gCoCk=Vq49pwagz4kwYw@mail.gmail.com>
Date:   Tue, 13 Jul 2021 10:40:06 +0800
From:   Joseph Hwang <josephsih@...gle.com>
To:     Jun Miao <jun.miao@...driver.com>
Cc:     marcel@...tmann.org, johan.hedberg@...il.com, luiz.dentz@...il.com,
        kiran.k@...el.com, chethan.tumkur.narayan@...el.com,
        AyappadasX.Ps@...el.com, linux-bluetooth@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [v2] Bluetooth: btusb: Fix a unspported condition to set
 debug features

Hi Jun Miao:

  Thanks for the patch checking out the condition of debug features.
However, the patch is actually covered by two patches that are being
reviewed.

  - [v4,1/4] Bluetooth: btusb: disable Intel link statistics telemetry
events (https://patchwork.kernel.org/project/bluetooth/patch/20210618160016.v4.1.I41aec59e65ffd3226d368dabeb084af13cc133c8@changeid/)
— this patch disables the debug features by default to avoid overhead.

  - [v4,3/4] Bluetooth: set quality report callback for Intel
(https://patchwork.kernel.org/project/bluetooth/patch/20210618160016.v4.3.I50ffa4cd0b3ab11669ff2541fc719fee00b4e244@changeid/)
— this patch checks the condition of debug features and does some
other things.

Thanks and regards,
Joseph

On Sat, Jul 10, 2021 at 11:02 AM Jun Miao <jun.miao@...driver.com> wrote:
>
> When reading the support debug features failed, there are not available
> features init. Continue to set the debug features is illogical, we should
> skip btintel_set_debug_features(), even if checked by "if (!features)".
>
> Fixes: c453b10c2b28 ("Bluetooth: btusb: Configure Intel debug feature based on available support")
> Signed-off-by: Jun Miao <jun.miao@...driver.com>
> ---
>  drivers/bluetooth/btusb.c | 18 ++++++++++--------
>  1 file changed, 10 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
> index a9855a2dd561..20c804069991 100644
> --- a/drivers/bluetooth/btusb.c
> +++ b/drivers/bluetooth/btusb.c
> @@ -2907,10 +2907,11 @@ static int btusb_setup_intel_new(struct hci_dev *hdev)
>         /* Read the Intel supported features and if new exception formats
>          * supported, need to load the additional DDC config to enable.
>          */
> -       btintel_read_debug_features(hdev, &features);
> -
> -       /* Set DDC mask for available debug features */
> -       btintel_set_debug_features(hdev, &features);
> +       err = btintel_read_debug_features(hdev, &features);
> +       if (!err) {
> +               /* Set DDC mask for available debug features */
> +               btintel_set_debug_features(hdev, &features);
> +       }
>
>         /* Read the Intel version information after loading the FW  */
>         err = btintel_read_version(hdev, &ver);
> @@ -3003,10 +3004,11 @@ static int btusb_setup_intel_newgen(struct hci_dev *hdev)
>         /* Read the Intel supported features and if new exception formats
>          * supported, need to load the additional DDC config to enable.
>          */
> -       btintel_read_debug_features(hdev, &features);
> -
> -       /* Set DDC mask for available debug features */
> -       btintel_set_debug_features(hdev, &features);
> +       err = btintel_read_debug_features(hdev, &features);
> +       if (!err) {
> +               /* Set DDC mask for available debug features */
> +               btintel_set_debug_features(hdev, &features);
> +       }
>
>         /* Read the Intel version information after loading the FW  */
>         err = btintel_read_version_tlv(hdev, &version);
> --
> 2.32.0
>


-- 

Joseph Shyh-In Hwang
Email: josephsih@...gle.com