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

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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>

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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

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drivers/bluetooth/btrtl.c

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