Just following up on this. It appears several people have had success using this patch to get their bluetooth devices working: https://bugzilla.kernel.org/show_bug.cgi?id=208965. Is there anything else I should include? Best, Edward On Tue, Oct 27, 2020 at 12:03 AM Edward Vear <edwardvear@xxxxxxxxx> wrote: > > During controller initialization, an LE Set RPA Timeout command is sent > to the controller if supported. However, the value checked to determine > if the command is supported is incorrect. Page 1921 of the Bluetooth > Core Spec v5.2 shows that bit 2 of octet 35 of the Supported_Commands > field corresponds to the LE Set RPA Timeout command, but currently > bit 6 of octet 35 is checked. This patch checks the correct value > instead. > > This issue led to the error seen in the following btmon output during > initialization of an adapter (rtl8761b) and prevented initialization > from completing. > > < HCI Command: LE Set Resolvable Private Address Timeout (0x08|0x002e) plen 2 > Timeout: 900 seconds > > HCI Event: Command Complete (0x0e) plen 4 > LE Set Resolvable Private Address Timeout (0x08|0x002e) ncmd 2 > Status: Unsupported Remote Feature / Unsupported LMP Feature (0x1a) > = Close Index: 00:E0:4C:6B:E5:03 > > The error did not appear when running with this patch. > > Signed-off-by: Edward Vear <edwardvear@xxxxxxxxx> > --- > net/bluetooth/hci_core.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c > index 502552d6e9af..c4aa2cbb9269 100644 > --- a/net/bluetooth/hci_core.c > +++ b/net/bluetooth/hci_core.c > @@ -763,7 +763,7 @@ static int hci_init3_req(struct hci_request *req, unsigned long opt) > hci_req_add(req, HCI_OP_LE_CLEAR_RESOLV_LIST, 0, NULL); > } > > - if (hdev->commands[35] & 0x40) { > + if (hdev->commands[35] & 0x04) { > __le16 rpa_timeout = cpu_to_le16(hdev->rpa_timeout); > > /* Set RPA timeout */ > -- > 2.29.1 >
