linux-kernel - Re: [PATCH] Bluetooth: hci_sync: fix BR/EDR wakeup bug

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Message-ID: <CABBYNZ+0CqK=iu77oZfE2oBjD3DisSAcvLRyoUqD+_C=TOs0ZQ@mail.gmail.com>
Date:   Mon, 27 Nov 2023 09:00:11 -0500
From:   Luiz Augusto von Dentz <luiz.dentz@...il.com>
To:     15013537245@....com
Cc:     marcel@...tmann.org, johan.hedberg@...il.com,
        linux-bluetooth@...r.kernel.org, linux-kernel@...r.kernel.org,
        "clancy.shang" <clancy.shang@...ctel.com>
Subject: Re: [PATCH] Bluetooth: hci_sync: fix BR/EDR wakeup bug

Hi,

On Mon, Nov 27, 2023 at 4:06 AM <15013537245@....com> wrote:
>
> From: "clancy.shang" <clancy.shang@...ctel.com>
>
> Steam deck in suspending state, but bt controller send hci
> mode change event to host. cause Steam Deck can't into sleep.

It probably makes sense to add the btmon trace showing the issue.

> Signed-off-by: clancy.shang <clancy.shang@...ctel.com>
> ---
>  net/bluetooth/hci_sync.c | 10 ++++++----
>  1 file changed, 6 insertions(+), 4 deletions(-)
>
> diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c
> index a15ab0b874a9..a26a58cb2c38 100644
> --- a/net/bluetooth/hci_sync.c
> +++ b/net/bluetooth/hci_sync.c
> @@ -3800,12 +3800,14 @@ static int hci_set_event_mask_sync(struct hci_dev *hdev)
>         if (lmp_bredr_capable(hdev)) {
>                 events[4] |= 0x01; /* Flow Specification Complete */
>
> -               /* Don't set Disconnect Complete when suspended as that
> -                * would wakeup the host when disconnecting due to
> -                * suspend.
> +               /* Don't set Disconnect Complete and mode change when
> +                * suspended as that would wakeup the host when disconnecting
> +                * due to suspend.
>                  */
> -               if (hdev->suspended)
> +               if (hdev->suspended) {
>                         events[0] &= 0xef;
> +                       events[2] &= 0xf7;
> +               }
>         } else {
>                 /* Use a different default for LE-only devices */
>                 memset(events, 0, sizeof(events));
> --
> 2.25.1
>


-- 
Luiz Augusto von Dentz