[PATCH 0/2] Bluetooth: Avoid centralized adv handle tracking for extended features

[Daniel Winkler <danielwinkler@google.com>]

Hi Maintainers,

This series addresses a race condition where an advertisement
registration can conflict with a software rotation advertisement
refresh. I found that this issue was only occurring with the new
extended MGMT advertising interface. A bad use of the
hdev->cur_adv_instance caused every new instance to be immediately sent
to the controller rather than queued for software rotation, opening a
path for the race to occur.

This series improves the way new extended advertising hci callbacks
track the relevant adv handle, removing the need for the
cur_adv_instance use. In a separate patch, the incorrect usage of
cur_adv_instance is removed, to align the extended MGMT commands to the
original add_advertising usage. The series was tested on both extended
and non-extended bluetooth controllers to confirm that the race
condition is resolved, and that multi- and single-advertising automated
test scenarios are still successful.

Thanks in advance,
Daniel


Daniel Winkler (2):
  Bluetooth: Use ext adv handle from requests in CCs
  Bluetooth: Do not set cur_adv_instance in adv param MGMT request

 net/bluetooth/hci_event.c | 16 +++++++---------
 net/bluetooth/mgmt.c      |  1 -
 2 files changed, 7 insertions(+), 10 deletions(-)

-- 
2.31.0.208.g409f899ff0-goog