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Commit 75e0569f authored by Marcel Holtmann's avatar Marcel Holtmann Committed by Johan Hedberg
Browse files

Bluetooth: Add hci_reset_dev() for driver triggerd stack reset 



Some Bluetooth drivers require to reset the upper stack. To avoid having
all drivers send HCI Hardware Error events, provide a generic function
to wrap the reset functionality.

Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: default avatarJohan Hedberg <johan.hedberg@intel.com>
parent 65efd2bf

include/net/bluetooth/hci_core.h

+1 −0
Original line number Diff line number Diff line
@@ -856,6 +856,7 @@ int hci_register_dev(struct hci_dev *hdev); 
void hci_unregister_dev(struct hci_dev *hdev);

int hci_suspend_dev(struct hci_dev *hdev);

int hci_resume_dev(struct hci_dev *hdev);

int hci_reset_dev(struct hci_dev *hdev);

int hci_dev_open(__u16 dev);

int hci_dev_close(__u16 dev);

int hci_dev_reset(__u16 dev);

net/bluetooth/hci_core.c

+18 −0
Original line number Diff line number Diff line
@@ -4248,6 +4248,24 @@ int hci_resume_dev(struct hci_dev *hdev) 
}

EXPORT_SYMBOL(hci_resume_dev);



/* Reset HCI device */

int hci_reset_dev(struct hci_dev *hdev)

{

	const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 };

	struct sk_buff *skb;



	skb = bt_skb_alloc(3, GFP_ATOMIC);

	if (!skb)

		return -ENOMEM;



	bt_cb(skb)->pkt_type = HCI_EVENT_PKT;

	memcpy(skb_put(skb, 3), hw_err, 3);



	/* Send Hardware Error to upper stack */

	return hci_recv_frame(hdev, skb);

}

EXPORT_SYMBOL(hci_reset_dev);



/* Receive frame from HCI drivers */

int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)

{