tree 0da4305a8246c93e233b71783913205b3bdb0dd4
parent cbed0ca137ef442c545602a09030bbb35d8db013
author Johan Hedberg <johan.hedberg@intel.com> 1380656690 +0300
committer Marcel Holtmann <marcel@holtmann.org> 1380695228 -0700

Bluetooth: Fix workqueue synchronization in hci_dev_open

When hci_sock.c calls hci_dev_open it needs to ensure that there isn't
pending work in progress, such as that which is scheduled for the
initial setup procedure or the one for automatically powering off after
the setup procedure. This adds the necessary calls to ensure that any
previously scheduled work is completed before attempting to call
hci_dev_do_open.

This patch fixes a race with old user space versions where we might
receive a HCIDEVUP ioctl before the setup procedure has been completed.
When that happens the setup procedures callback may fail early and leave
the device in an inconsistent state, causing e.g. the setup callback to
be (incorrectly) called more than once.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>