linux-kernel - Re: [PATCH v3 1/2] Bluetooth: btusb: Indicate Microsoft vendor extension for Intel 9460/9560 and 9160/9260

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Message-Id: <ADF19483-721C-4263-8CA8-CF4587E79BA4@holtmann.org>
Date:   Thu, 26 Mar 2020 10:01:56 +0100
From:   Marcel Holtmann <marcel@...tmann.org>
To:     Miao-chen Chou <mcchou@...omium.org>
Cc:     Bluetooth Kernel Mailing List <linux-bluetooth@...r.kernel.org>,
        Alain Michaud <alainm@...omium.org>,
        Luiz Augusto von Dentz <luiz.von.dentz@...el.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        LKML <linux-kernel@...r.kernel.org>, netdev@...r.kernel.org
Subject: Re: [PATCH v3 1/2] Bluetooth: btusb: Indicate Microsoft vendor
 extension for Intel 9460/9560 and 9160/9260

Hi Miao-chen,

> This adds a bit mask of driver_info for Microsoft vendor extension and
> indicates the support for Intel 9460/9560 and 9160/9260. See
> https://docs.microsoft.com/en-us/windows-hardware/drivers/bluetooth/
> microsoft-defined-bluetooth-hci-commands-and-events for more information
> about the extension. This was verified with Intel ThunderPeak BT controller
> where msft_vnd_ext_opcode is 0xFC1E.
> 
> Signed-off-by: Miao-chen Chou <mcchou@...omium.org>
> ---
> 
> Changes in v3:
> - Create net/bluetooth/msft.c with struct msft_vnd_ext defined internally
> and change the hdev->msft_ext field to void*.
> - Define and expose msft_vnd_ext_set_opcode() for btusb use.
> - Init hdev->msft_ext in hci_alloc_dev() and deinit it in hci_free_dev().

so I spent some cycles on thinking about on how we can have this nice and cleanly without putting too much into the core stack or hci_dev. I took your patches and converted them a little bit into how I would do it. Please have a look.

Regards

Marcel