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

["Narasimman, Sathish" <sathish.narasimman@xxxxxxxxx>]

Hi

> -----Original Message-----
> From: Sathish Narasimman <nsathish41@xxxxxxxxx>
> Sent: Thursday, October 29, 2020 1:18 PM
> To: linux-bluetooth@xxxxxxxxxxxxxxx
> Cc: Tumkur Narayan, Chethan <chethan.tumkur.narayan@xxxxxxxxx>;
> Srivatsa, Ravishankar <ravishankar.srivatsa@xxxxxxxxx>; K, Kiran
> <kiran.k@xxxxxxxxx>; Narasimman, Sathish
> <sathish.narasimman@xxxxxxxxx>
> Subject: [PATCH] Bluetooth: Fix: LL PRivacy BLE device fails to connect
> 
> 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
> 
> Fixes: 0eee35bdfa3b ("Bluetooth: Update resolving list when updating
> whitelist")
> 
> 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

Regards
Sathish N