openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

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: Loic Poulain <loic.poulain@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Loic Poulain 2015-09-29 15:05:44 +02:00 committed by Marcel Holtmann
parent a913718812
commit fbef168fec
2 changed files with 22 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
include/net/bluetooth/hci_core.h
View File

@ -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,

19
net/bluetooth/hci_core.c
View File

@ -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)
{