linux-kernel - Re: [PATCH v3] Bluetooth: mgmt: Fix MGMT add advmon with RSSI command

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Message-ID: <CABBYNZKwHtoSfTOb+1A-NGqePzkP-LD1A3Fyb32xTrF4Qzj-Jg@mail.gmail.com>
Date:   Thu, 16 Mar 2023 10:34:52 -0700
From:   Luiz Augusto von Dentz <luiz.dentz@...il.com>
To:     Howard Chung <howardchung@...gle.com>
Cc:     linux-bluetooth@...r.kernel.org, marcel@...tmann.org,
        chromeos-bluetooth-upstreaming@...omium.org,
        Archie Pusaka <apusaka@...omium.org>,
        Brian Gix <brian.gix@...el.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        Paolo Abeni <pabeni@...hat.com>, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org
Subject: Re: [PATCH v3] Bluetooth: mgmt: Fix MGMT add advmon with RSSI command

Hi Howard,

On Thu, Mar 16, 2023 at 3:11 AM Howard Chung <howardchung@...gle.com> wrote:
>
> The MGMT command: MGMT_OP_ADD_ADV_PATTERNS_MONITOR_RSSI uses variable
> length argument. This causes host not able to register advmon with rssi.

There is a way to prevent these regression, which would be to actually
implement tests for these commands in the likes of mgmt-tester so we
can catch regressions via CI, so I hope to see some work in this
direction.

> This patch has been locally tested by adding monitor with rssi via
> btmgmt on a kernel 6.1 machine.
>
> Reviewed-by: Archie Pusaka <apusaka@...omium.org>
> Fixes: b338d91703fa ("Bluetooth: Implement support for Mesh")
> Signed-off-by: Howard Chung <howardchung@...gle.com>
> ---
>
> Changes in v3:
> - Moved commit-notes to commit message
> - Fixed a typo
>
> Changes in v2:
> - Fixed git user name
> - Included commit notes for the test step.
>
>  net/bluetooth/mgmt.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
> index 39589f864ea7..249dc6777fb4 100644
> --- a/net/bluetooth/mgmt.c
> +++ b/net/bluetooth/mgmt.c
> @@ -9357,7 +9357,8 @@ static const struct hci_mgmt_handler mgmt_handlers[] = {
>         { add_ext_adv_data,        MGMT_ADD_EXT_ADV_DATA_SIZE,
>                                                 HCI_MGMT_VAR_LEN },
>         { add_adv_patterns_monitor_rssi,
> -                                  MGMT_ADD_ADV_PATTERNS_MONITOR_RSSI_SIZE },
> +                                  MGMT_ADD_ADV_PATTERNS_MONITOR_RSSI_SIZE,
> +                                               HCI_MGMT_VAR_LEN },
>         { set_mesh,                MGMT_SET_MESH_RECEIVER_SIZE,
>                                                 HCI_MGMT_VAR_LEN },
>         { mesh_features,           MGMT_MESH_READ_FEATURES_SIZE },
> --
> 2.40.0.rc2.332.ga46443480c-goog
>


-- 
Luiz Augusto von Dentz