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Commit5ead206361("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:5ead206361("Bluetooth: btrtl: fix RTL8761B/BU broken LE extended scan") Cc: stable@vger.kernel.org Signed-off-by: Junjie Cao <junjie.cao@intel.com> Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>