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Bluetooth: Add __hci_cmd_send function

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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: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Loic Poulain 2018-04-26 13:13:26 +02:00 committed by Marcel Holtmann
parent d36dfb3e9b
commit d6ee6ad774
2 changed files with 33 additions and 0 deletions
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2
include/net/bluetooth/hci_core.h
View File

@ -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);

31
net/bluetooth/hci_core.c
View File

@ -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)
{