The HCI controller debugfs interface is created during setup or when a controller is configured, but there is nothing preventing a controller from being configured multiple times (e.g. by setting the device address), which results in a host of errors in the logs: debugfs: File 'features' in directory 'hci0' already present! debugfs: File 'manufacturer' in directory 'hci0' already present! debugfs: File 'hci_version' in directory 'hci0' already present! ... debugfs: File 'quirk_simultaneous_discovery' in directory 'hci0' already present! The Qualcomm driver suffers from a related problem for controllers with non-persistent setup. Johan Johan Hovold (2): Bluetooth: fix debugfs registration Bluetooth: hci_qca: fix debugfs registration drivers/bluetooth/hci_qca.c | 6 +++++- include/net/bluetooth/hci.h | 1 + net/bluetooth/hci_sync.c | 3 +++ 3 files changed, 9 insertions(+), 1 deletion(-) -- 2.39.2
