Commit fbef168f authored by Loic Poulain's avatar Loic Poulain Committed by Marcel Holtmann
Browse files

Bluetooth: Add hci_cmd_sync function 



Send a HCI command and wait for command complete event.
This function serializes the requests by grabbing the req_lock.

Signed-off-by: default avatarLoic Poulain <loic.poulain@intel.com>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent a9137188

include/net/bluetooth/hci_core.h

+3 −0
Original line number Diff line number Diff line
@@ -1349,6 +1349,9 @@ void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb); 


void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode);



struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,

			     const void *param, u32 timeout);



/* ----- HCI Sockets ----- */

void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb);

void hci_send_to_channel(unsigned short channel, struct sk_buff *skb,

net/bluetooth/hci_core.c

+19 −0
Original line number Diff line number Diff line
@@ -3580,6 +3580,25 @@ void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode) 
	return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;

}



/* Send HCI command and wait for command commplete event */

struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,

			     const void *param, u32 timeout)

{

	struct sk_buff *skb;



	if (!test_bit(HCI_UP, &hdev->flags))

		return ERR_PTR(-ENETDOWN);



	bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);



	hci_req_lock(hdev);

	skb = __hci_cmd_sync(hdev, opcode, plen, param, timeout);

	hci_req_unlock(hdev);



	return skb;

}

EXPORT_SYMBOL(hci_cmd_sync);



/* Send ACL data */

static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)

{