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Bluetooth: Add hci_reset_dev() for driver triggerd stack reset

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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: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
Marcel Holtmann 2014-11-02 08:15:38 +01:00 committed by Johan Hedberg
parent 65efd2bf48
commit 75e0569f7f
2 changed files with 19 additions and 0 deletions
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1
include/net/bluetooth/hci_core.h
View File

@ -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);

18
net/bluetooth/hci_core.c
View File

@ -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)
{