github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-07-27 17:47:41 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

Bluetooth: btrtl: fix RTL8761B/BU broken LE extended scan

Browse Source 
RTL8761B and RTL8761BU devices report HCI version 5.1 but do not
support the LE Extended Scan commands. This causes repeated failures
with Opcode 0x2042 (LE Set Extended Scan Parameters) returning -EBUSY
when BlueZ attempts extended scanning while a connection is active.

Set HCI_QUIRK_BROKEN_EXT_SCAN for CHIP_ID_8761B to make BlueZ fall
back to legacy LE scan commands which the firmware supports correctly.

Tested with RTL8761BU (USB ID 0bda:a728) where the issue manifested
as continuous 'Opcode 0x2042 failed: -16' errors in dmesg whenever
a BLE connection was active.

Signed-off-by: Alexej Sidorenko <alexej@sidorenko.cz>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
Alexej Sidorenko 2026-04-29 17:13:43 +02:00 committed by Luiz Augusto von Dentz
parent 48788c8de7
commit 5ead206361
1 changed files with 13 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/bluetooth/btrtl.c
View File

@ -1342,6 +1342,19 @@ void btrtl_set_quirks(struct hci_dev *hdev, struct btrtl_device_info *btrtl_dev)
if (!btrtl_dev->ic_info)
return;
switch (btrtl_dev->project_id) {
case CHIP_ID_8761B:
/* RTL8761B/BU reports HCI version 5.1 but does not support
* the LE Extended Scan commands (Opcode 0x2042), causing
* repeated -EBUSY failures when BlueZ attempts extended
* scanning while a connection is active.
*/
hci_set_quirk(hdev, HCI_QUIRK_BROKEN_EXT_SCAN);
break;
default:
break;
}
switch (btrtl_dev->ic_info->lmp_subver) {
case RTL_ROM_LMP_8703B:
/* 8723CS reports two pages for local ext features,