linux-kernel - Re: Re: [PATCH] Bluetooth: hci_sync: Fix BLE devices were unable to disable the wakeup function

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Message-ID: <CABBYNZ+GBcoru9F82BNfkr-R8Tv4psEjpKqLWxqRDnr=Ny_nxw@mail.gmail.com>
Date: Tue, 9 Jan 2024 08:41:45 -0500
From: Luiz Augusto von Dentz <luiz.dentz@...il.com>
To: clancy_shang <clancy_shang@....com>
Cc: marcel@...tmann.org, johan.hedberg@...il.com, 
	linux-bluetooth@...r.kernel.org, linux-kernel@...r.kernel.org, 
	zhongjun.yu@...ctel.com, Clancy Shang <clancy.shang@...ctel.com>
Subject: Re: Re: [PATCH] Bluetooth: hci_sync: Fix BLE devices were unable to
 disable the wakeup function

Hi Clancy,

On Tue, Jan 9, 2024 at 4:26 AM clancy_shang <clancy_shang@....com> wrote:
>
> Hi Luiz Augusto von Dentz,
>
> Thanks for you suggestions. is the patch has been accepted? or need me modify as your suggested and resend to you?

It has been applied already:

https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/commit/?id=0bcd317e8b31833d36cd9843902905aafbd70017

> Kind regards,
>
> Clancy
>
>
>
>
>
>
>
> At 2024-01-05 23:21:59, "Luiz Augusto von Dentz" <luiz.dentz@...il.com> wrote:
> >Hi Clancy,
> >
> >On Thu, Jan 4, 2024 at 9:56 PM <clancy_shang@....com> wrote:
> >>
> >> From: Clancy Shang <clancy.shang@...ctel.com>
> >>
> >> when BLE master enter suspend,  it does not delete the peripheral that
> >> in acceptlist. so if disable the wakeup function, the BLE master scans with
> >> basic filter next time, the peripheral can be scanned which is unexpected
> >>
> >> Signed-off-by: Clancy Shang <clancy.shang@...ctel.com>
> >> ---
> >>  net/bluetooth/hci_sync.c | 10 ++++++++++
> >>  1 file changed, 10 insertions(+)
> >>
> >> diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c
> >> index d85a7091a116..abc7f614da5f 100644
> >> --- a/net/bluetooth/hci_sync.c
> >> +++ b/net/bluetooth/hci_sync.c
> >> @@ -2533,6 +2533,7 @@ static u8 hci_update_accept_list_sync(struct hci_dev *hdev)
> >>         struct bdaddr_list *b, *t;
> >>         u8 num_entries = 0;
> >>         bool pend_conn, pend_report;
> >> +       struct hci_conn_params *conn_params;
> >>         u8 filter_policy;
> >>         size_t i, n;
> >>         int err;
> >> @@ -2585,6 +2586,15 @@ static u8 hci_update_accept_list_sync(struct hci_dev *hdev)
> >>                         continue;
> >>                 }
> >>
> >> +               conn_params = hci_conn_params_lookup(hdev, &b->bdaddr, b->bdaddr_type);
> >> +               /* During suspend, only wakeable devices can be in acceptlist */
> >> +               if (conn_params && hdev->suspended &&
> >> +                   !(conn_params->flags & HCI_CONN_FLAG_REMOTE_WAKEUP)) {
> >> +                       hci_le_del_accept_list_sync(hdev, &b->bdaddr,
> >> +                                                   b->bdaddr_type);
> >> +                       continue;
> >> +               }
> >
> >This might require a lock since that is not a copy of the conn_params
> >which can be updated concurrently, so perhaps something like the
> >following is might be safer:
> >
> >diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c
> >index b3141e3f9cf6..eeb73a54fd26 100644
> >--- a/net/bluetooth/hci_sync.c
> >+++ b/net/bluetooth/hci_sync.c
> >@@ -2206,8 +2206,11 @@ static int hci_le_add_accept_list_sync(struct
> >hci_dev *hdev,
> >
> >        /* During suspend, only wakeable devices can be in acceptlist */
> >        if (hdev->suspended &&
> >-           !(params->flags & HCI_CONN_FLAG_REMOTE_WAKEUP))
> >+           !(params->flags & HCI_CONN_FLAG_REMOTE_WAKEUP)) {
> >+               hci_le_del_accept_list_sync(hdev, &params->bdaddr,
> >+                                           params->bdaddr_type);
> >                return 0;
> >+       }
> >
> >        /* Select filter policy to accept all advertising */
> >        if (*num_entries >= hdev->le_accept_list_size)
> >
> >>                 num_entries++;
> >>         }
> >>
> >> --
> >> 2.25.1
> >>
> >
> >
> >--
> >Luiz Augusto von Dentz



-- 
Luiz Augusto von Dentz