[0/4] Power off HCI devices before rfkilling them

Message

Jonas Dreßler Jan. 2, 2024, 1:33 p.m. UTC

In theory the firmware is supposed to power off the bluetooth card
when we use rfkill to block it. This doesn't work on a lot of laptops
though, leading to weird issues after turning off bluetooth, like the
connection timing out on the peripherals which were connected, and
bluetooth not connecting properly when the adapter is turned on again
quickly after rfkilling.

This series hooks into the rfkill driver from the bluetooth subsystem
to send a HCI_POWER_OFF command to the adapter before actually submitting
the rfkill to the firmware and killing the HCI connection.

Jonas Dreßler (4):
  Bluetooth: HCI: Remove HCI_POWER_OFF_TIMEOUT
  Bluetooth: mgmt: Remove leftover queuing of power_off work
  Bluetooth: HCI: Add new state HCI_POWERING_DOWN
  hci: Queue a HCI power-off command before rfkilling adapters

 include/net/bluetooth/hci.h |  2 +-
 net/bluetooth/hci_core.c    | 33 ++++++++++++++++++++++++++++++---
 net/bluetooth/hci_sync.c    | 16 +++++++++++-----
 net/bluetooth/mgmt.c        | 30 ++++++++++++++----------------
 4 files changed, 56 insertions(+), 25 deletions(-)