Re: [PATCH] Bluetooth: Fix: LL PRivacy BLE device fails to connect

[Luiz Augusto von Dentz <luiz.dentz@xxxxxxxxx>]

Hi Sathish,

On Wed, Oct 28, 2020 at 4:46 PM Sathish Narasimman <nsathish41@xxxxxxxxx> wrote:
>
> Hi
>
> On Thu, Oct 22, 2020 at 1:47 PM Sathish Narasimman <nsathish41@xxxxxxxxx> wrote:
> >
> > When adding device to white list the device is added to resolving list
> > also it has to be added only when HCI_ENABLE_LL_PRIVACY flag is set.
> > HCI_ENABLE_LL_PRIVACY flag has to be tested before adding/deleting devices
> > to resolving list. use_ll_privacy macro is used only to check if controller
> > supports LL_Privacy.
> >
> > https://bugzilla.kernel.org/show_bug.cgi?id=209745
> >
> > Signed-off-by: Sathish Narasimman <sathish.narasimman@xxxxxxxxx>
> > ---
> >  net/bluetooth/hci_request.c | 12 ++++++++----
> >  1 file changed, 8 insertions(+), 4 deletions(-)
> >
> > diff --git a/net/bluetooth/hci_request.c b/net/bluetooth/hci_request.c
> > index 6f12bab4d2fa..610ed0817bd7 100644
> > --- a/net/bluetooth/hci_request.c
> > +++ b/net/bluetooth/hci_request.c
> > @@ -698,7 +698,8 @@ static void del_from_white_list(struct hci_request *req, bdaddr_t *bdaddr,
> >                    cp.bdaddr_type);
> >         hci_req_add(req, HCI_OP_LE_DEL_FROM_WHITE_LIST, sizeof(cp), &cp);
> >
> > -       if (use_ll_privacy(req->hdev)) {
> > +       if (use_ll_privacy(req->hdev) &&
> > +           hci_dev_test_flag(req->hdev, HCI_ENABLE_LL_PRIVACY)) {
> >                 struct smp_irk *irk;
> >
> >                 irk = hci_find_irk_by_addr(req->hdev, bdaddr, bdaddr_type);
> > @@ -732,7 +733,8 @@ static int add_to_white_list(struct hci_request *req,
> >                 return -1;
> >
> >         /* White list can not be used with RPAs */
> > -       if (!allow_rpa && !use_ll_privacy(hdev) &&
> > +       if (!allow_rpa &&
> > +           !hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY) &&
> >             hci_find_irk_by_addr(hdev, &params->addr, params->addr_type)) {
> >                 return -1;
> >         }
> > @@ -750,7 +752,8 @@ static int add_to_white_list(struct hci_request *req,
> >                    cp.bdaddr_type);
> >         hci_req_add(req, HCI_OP_LE_ADD_TO_WHITE_LIST, sizeof(cp), &cp);
> >
> > -       if (use_ll_privacy(hdev)) {
> > +       if (use_ll_privacy(hdev) &&
> > +           hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY)) {
> >                 struct smp_irk *irk;
> >
> >                 irk = hci_find_irk_by_addr(hdev, &params->addr,
> > @@ -812,7 +815,8 @@ static u8 update_white_list(struct hci_request *req)
> >                 }
> >
> >                 /* White list can not be used with RPAs */
> > -               if (!allow_rpa && !use_ll_privacy(hdev) &&
> > +               if (!allow_rpa &&
> > +                   !hci_dev_test_flag(hdev, HCI_ENABLE_LL_PRIVACY) &&
> >                     hci_find_irk_by_addr(hdev, &b->bdaddr, b->bdaddr_type)) {
> >                         return 0x00;
> >                 }
> > --
> > 2.17.1
> >
>
>
> Gentle reminder.
> Seems Many devices are failing to reconnect after every on 5.9 kernel
>
> This patch will FIX the issue

Btw, you should probably mention the commit id that introduced this regression.

-- 
Luiz Augusto von Dentz