kernel/git/next/linux-next.git/drivers/bluetooth/btusb.c, branch stable

Bluetooth: btusb: limit RTL8761B BROKEN_EXT_SCAN quirk to 0bda:a728

2026-08-24T17:13:28+00:00

Commit 5ead2063611a ("Bluetooth: btrtl: fix RTL8761B/BU broken LE extended scan") set HCI_QUIRK_BROKEN_EXT_SCAN for every CHIP_ID_8761B device to cure repeated 0x2042 failures on an 0bda:a728 dongle. The brokenness is per-dongle, not per-chip: on a TP-Link UB500 (2357:0604, RTL8761BU, fw 0xdfc6d922) extended scan works, and the legacy scan path the quirk forces is what is broken -- LE Set Scan Enable (0x200c) times out with -110 about 30 s after firmware load, btusb resets the device, and the adapter re-enumerates in an endless loop (382 firmware reloads in one boot). 7.1.8, which predates the stable backport, runs clean on this unit; 7.1.9 loops. Move the quirk from btrtl's chip-wide switch to a btusb device-table flag on the USB id the original fix was verified against. Other 8761B dongles return to their earlier long-standing behaviour. Link: https://bugzilla.redhat.com/show_bug.cgi?id=2521504 Fixes: 5ead2063611a ("Bluetooth: btrtl: fix RTL8761B/BU broken LE extended scan") Cc: stable@vger.kernel.org Signed-off-by: Junjie Cao Signed-off-by: Luiz Augusto von Dentz

Bluetooth: btusb: Simplify btusb_recv_bulk() by hci_acl_dlen()

2026-08-07T19:38:31+00:00

Simplify btusb_recv_bulk() by using hci_acl_dlen() instead of: __le16 dlen = hci_acl_hdr(skb)->dlen; ... __le16_to_cpu(dlen) ... Signed-off-by: Zijun Hu Signed-off-by: Luiz Augusto von Dentz

Bluetooth: btusb: Add a simple static btusb_prepare_reset()

2026-08-07T19:38:30+00:00

Add btusb_prepare_reset() to do cleanup before a reset, and apply it to btusb_mtk_reset() as well. Signed-off-by: Zijun Hu Signed-off-by: Luiz Augusto von Dentz

Bluetooth: btusb: Make btusb_recv_{event,acl}() take struct hci_dev *

2026-08-07T19:38:30+00:00

Both helpers currently take struct btusb_data *, which is private to btusb.c, as parameter type as below: int btusb_recv_event(struct btusb_data *data, struct sk_buff *skb) int btusb_recv_acl(struct btusb_data *data, struct sk_buff *skb) To allow vendor USB-transport-specific source files to share them as well, change the type to struct hci_dev *. Signed-off-by: Zijun Hu Signed-off-by: Luiz Augusto von Dentz

Bluetooth: btusb: Realtek: Replace HCI_VENDOR_PKT usage with HCI_EV_VENDOR

2026-08-07T19:38:30+00:00

The macros below have different meanings even though they share the same value 0xff: HCI_VENDOR_PKT: HCI packet indicator or type HCI_EV_VENDOR: event code of a VSE This usage of HCI_VENDOR_PKT is wrongly checking an event code. Fix by using HCI_EV_VENDOR for event code. Signed-off-by: Zijun Hu Signed-off-by: Luiz Augusto von Dentz

Bluetooth: btusb: QCA: Replace HCI_VENDOR_PKT usages with HCI_EV_VENDOR

2026-08-07T19:38:30+00:00

The macros below have different meanings even though they share the same value 0xff: HCI_VENDOR_PKT: HCI packet indicator or type HCI_EV_VENDOR: event code of a VSE These usages of HCI_VENDOR_PKT are wrongly checking an event code. Fix by using HCI_EV_VENDOR for event code. Also fix warning "CHECK: Unnecessary parentheses around comparison" given by checkpatch.pl. Signed-off-by: Zijun Hu Signed-off-by: Luiz Augusto von Dentz

Bluetooth: btusb: Add support for 1357:c123 Realtek 8852BE device

2026-08-07T16:35:22+00:00

Wiko Hi MateBook 14 Ryzen 200 laptops (DMI system-product-name "MNCA-XX", board "M1060") are equipped with an RTL8852BE Wi-Fi/BT combo chip (rtw89_8852be), whose Bluetooth radio enumerates as 1357:c123 instead of one of the already-supported 1358:c123 / 0bda:c123 identifiers, presumably due to OEM rebranding. Without a matching entry it only matches the generic USB Bluetooth class fallback, so the Realtek firmware/config (rtl8852btu_fw.bin / rtl8852btu_config.bin) is never loaded and the adapter cannot discover or connect to any device, even though hciconfig reports it as powered and scanning. Device descriptor: idVendor 0x1357 idProduct 0xc123 bcdDevice 0.00 iManufacturer 1 Realtek iProduct 2 Bluetooth Radio bDeviceClass 224 Wireless bDeviceSubClass 1 Radio Frequency bDeviceProtocol 1 Bluetooth Adding the same BTUSB_REALTEK | BTUSB_WIDEBAND_SPEECH quirk already used for 1358:c123 and 0bda:c123 fixes firmware loading and normal operation. Signed-off-by: Pavel Zverev Signed-off-by: Luiz Augusto von Dentz

Bluetooth: btusb: Add ASUS USB-BT600 for Realtek 8761CU

2026-08-07T16:34:20+00:00

Add the vendor/product ID (0x0b05, 0x1d70) to the usb_device_id table for the Realtek RTL8761CU-based ASUS USB-BT600 adapter. It binds via the generic Bluetooth class today, so BTUSB_REALTEK is never set and the rtl8761cu firmware is not loaded, leaving the controller non-functional. With the entry the driver loads rtl_bt/rtl8761cu_fw.bin (already shipped by linux-firmware) and the adapter works (tested: A2DP and ASHA). Similar to commit bc597f0cc44f ("Bluetooth: btusb: Add TP-Link UB600 for Realtek 8761BUV"). Device info from /sys/kernel/debug/usb/devices: T: Bus=01 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#= 23 Spd=12 MxCh= 0 D: Ver= 1.10 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs= 1 P: Vendor=0b05 ProdID=1d70 Rev= 2.00 S: Manufacturer=Realtek S: Product=Bluetooth Controller C:* #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=100mA I:* If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=81(I) Atr=03(Int.) MxPS= 64 Ivl=1ms E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms I:* If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 0 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 0 Ivl=1ms I: If#= 1 Alt= 1 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 9 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 9 Ivl=1ms I: If#= 1 Alt= 2 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 17 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 17 Ivl=1ms I: If#= 1 Alt= 3 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 25 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 25 Ivl=1ms I: If#= 1 Alt= 4 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 33 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 33 Ivl=1ms I: If#= 1 Alt= 5 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 49 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 49 Ivl=1ms I: If#= 1 Alt= 6 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 63 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 63 Ivl=1ms Cc: stable@vger.kernel.org Signed-off-by: Christoph Zwerschke Reviewed-by: Paul Menzel Signed-off-by: Luiz Augusto von Dentz

Bluetooth: btusb: Add ASUS USB-BT540 for Realtek 8761CU

2026-08-07T16:33:59+00:00

Add the vendor/product ID (0x0b05, 0x1bef) to the usb_device_id table for the Realtek RTL8761CU-based ASUS USB-BT540 adapter. It binds via the generic Bluetooth class today, so BTUSB_REALTEK is never set and the rtl8761cu firmware is not loaded, leaving the controller non-functional. With the entry the driver loads rtl_bt/rtl8761cu_fw.bin (already shipped by linux-firmware) and the adapter works (tested: A2DP and ASHA). Similar to commit bc597f0cc44f ("Bluetooth: btusb: Add TP-Link UB600 for Realtek 8761BUV"). Device info from /sys/kernel/debug/usb/devices: T: Bus=01 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#= 22 Spd=12 MxCh= 0 D: Ver= 1.10 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs= 1 P: Vendor=0b05 ProdID=1bef Rev= 2.00 S: Manufacturer=Realtek S: Product=Bluetooth Controller C:* #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=100mA I:* If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=81(I) Atr=03(Int.) MxPS= 64 Ivl=1ms E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms I:* If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 0 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 0 Ivl=1ms I: If#= 1 Alt= 1 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 9 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 9 Ivl=1ms I: If#= 1 Alt= 2 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 17 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 17 Ivl=1ms I: If#= 1 Alt= 3 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 25 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 25 Ivl=1ms I: If#= 1 Alt= 4 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 33 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 33 Ivl=1ms I: If#= 1 Alt= 5 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 49 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 49 Ivl=1ms I: If#= 1 Alt= 6 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 63 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 63 Ivl=1ms Cc: stable@vger.kernel.org Signed-off-by: Christoph Zwerschke Reviewed-by: Paul Menzel Signed-off-by: Luiz Augusto von Dentz

Bluetooth: btusb: Add IMC Networks QCA9377 to quirks table

2026-08-07T16:33:20+00:00

Add the USB ID (13d3:3503) for the IMC Networks Qualcomm Atheros QCA9377 Bluetooth controller to the btusb quirks table. This device requires Qualcomm Rome firmware and wideband speech support to function properly; otherwise, BLE scanning fails with HCI unexpected event opcode 0x2005 errors. The device reports the following in /sys/kernel/debug/usb/devices: P: Vendor=13d3 ProdID=3503 Rev= 0.01 C:* #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=100mA I:* If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=1ms E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms I:* If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 0 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 0 Ivl=1ms I: If#= 1 Alt= 1 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 9 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 9 Ivl=1ms I: If#= 1 Alt= 2 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 17 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 17 Ivl=1ms I: If#= 1 Alt= 3 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 25 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 25 Ivl=1ms I: If#= 1 Alt= 4 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 33 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 33 Ivl=1ms I: If#= 1 Alt= 5 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 49 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 49 Ivl=1ms Signed-off-by: Tibor Harcsa Signed-off-by: Luiz Augusto von Dentz