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Bluetooth: hci_sync: add lock to protect HCI_UNREGISTER
[ Upstream commit 1857c19 ] When the HCI_UNREGISTER flag is set, no jobs should be scheduled. Fix potential race when HCI_UNREGISTER is set after the flag is tested in hci_cmd_sync_queue. Fixes: 0b94f26 ("Bluetooth: hci_sync: Fix queuing commands when HCI_UNREGISTER is set") Signed-off-by: Zhengping Jiang <jiangzp@google.com> Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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