linux-kernel - Re: [PATCH v3] Bluetooth: btrtl: HCI reset on close for Realtek BT chip

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Message-ID: <CAD8Lp44ZZZGf58XKZ1PFJrC5UqdQ17v17-nnEYC-Ro0-G_u1=Q@mail.gmail.com>
Date:   Mon, 1 Jul 2019 15:45:38 +0800
From:   Daniel Drake <drake@...lessm.com>
To:     Jian-Hong Pan <jian-hong@...lessm.com>
Cc:     Johan Hedberg <johan.hedberg@...il.com>,
        Marcel Holtmann <marcel@...tmann.org>,
        Linux Bluetooth mailing list 
        <linux-bluetooth@...r.kernel.org>,
        Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3] Bluetooth: btrtl: HCI reset on close for Realtek BT chip

On Tue, Jun 25, 2019 at 4:32 PM Jian-Hong Pan <jian-hong@...lessm.com> wrote:
> Realtek RTL8822BE BT chip on ASUS X420FA cannot be turned on correctly
> after on-off several times. Bluetooth daemon sets BT mode failed when
> this issue happens. Scanning must be active while turning off for this
> bug to be hit.
>
> bluetoothd[1576]: Failed to set mode: Failed (0x03)
>
> If BT is turned off, then turned on again, it works correctly again.
>
> According to the vendor driver, the HCI_QUIRK_RESET_ON_CLOSE flag is set
> during probing. So, this patch makes Realtek's BT reset on close to fix
> this issue.
>
> Link: https://bugzilla.kernel.org/show_bug.cgi?id=203429
> Signed-off-by: Jian-Hong Pan <jian-hong@...lessm.com>

Reviewed-by: Daniel Drake <drake@...lessm.com>