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Commit d6ee6ad7 authored by Loic Poulain's avatar Loic Poulain Committed by Marcel Holtmann
Browse files

Bluetooth: Add __hci_cmd_send function 



This function allows to send a HCI command without expecting any
controller event/response in return. This is allowed for vendor-
specific commands only.

Signed-off-by: default avatarLoic Poulain <loic.poulain@linaro.org>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent d36dfb3e

include/net/bluetooth/hci_core.h

+2 −0
Original line number Diff line number Diff line
@@ -1393,6 +1393,8 @@ struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen, 
			       const void *param, u32 timeout);

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

				  const void *param, u8 event, u32 timeout);

int __hci_cmd_send(struct hci_dev *hdev, u16 opcode, u32 plen,

		   const void *param);



int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,

		 const void *param);

net/bluetooth/hci_core.c

+31 −0
Original line number Diff line number Diff line
@@ -3422,6 +3422,37 @@ int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, 
	return 0;

}



int __hci_cmd_send(struct hci_dev *hdev, u16 opcode, u32 plen,

		   const void *param)

{

	struct sk_buff *skb;



	if (hci_opcode_ogf(opcode) != 0x3f) {

		/* A controller receiving a command shall respond with either

		 * a Command Status Event or a Command Complete Event.

		 * Therefore, all standard HCI commands must be sent via the

		 * standard API, using hci_send_cmd or hci_cmd_sync helpers.

		 * Some vendors do not comply with this rule for vendor-specific

		 * commands and do not return any event. We want to support

		 * unresponded commands for such cases only.

		 */

		bt_dev_err(hdev, "unresponded command not supported");

		return -EINVAL;

	}



	skb = hci_prepare_cmd(hdev, opcode, plen, param);

	if (!skb) {

		bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)",

			   opcode);

		return -ENOMEM;

	}



	hci_send_frame(hdev, skb);



	return 0;

}

EXPORT_SYMBOL(__hci_cmd_send);



/* Get data from the previously sent command */

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

{