From: Mattijs Korpershoek <mkorpershoek@xxxxxxxxxxxx> [ Upstream commit eb8c101e28496888a0dcfe16ab86a1bee369e820 ] During the setup() stage, HCI device drivers expect the chip to acknowledge its setup() completion via vendor specific frames. If userspace opens() such HCI device in HCI_USER_CHANNEL [1] mode, the vendor specific frames are never tranmitted to the driver, as they are filtered in hci_rx_work(). Allow HCI devices which operate in HCI_USER_CHANNEL mode to receive frames if the HCI device is is HCI_INIT state. [1] https://www.spinics.net/lists/linux-bluetooth/msg37345.html Fixes: 23500189d7e0 ("Bluetooth: Introduce new HCI socket channel for user operation") Signed-off-by: Mattijs Korpershoek <mkorpershoek@xxxxxxxxxxxx> Signed-off-by: Marcel Holtmann <marcel@xxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- net/bluetooth/hci_core.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c index d6d7364838f47..ff80a9d41ce17 100644 --- a/net/bluetooth/hci_core.c +++ b/net/bluetooth/hci_core.c @@ -4215,7 +4215,14 @@ static void hci_rx_work(struct work_struct *work) hci_send_to_sock(hdev, skb); } - if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) { + /* If the device has been opened in HCI_USER_CHANNEL, + * the userspace has exclusive access to device. + * When device is HCI_INIT, we still need to process + * the data packets to the driver in order + * to complete its setup(). + */ + if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL) && + !test_bit(HCI_INIT, &hdev->flags)) { kfree_skb(skb); continue; } -- 2.20.1
