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Bluetooth: Set LE Suggested Default Data Length to maximum

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When LE Data Packet Length Extension is supported, then actually
increase the suggested default data length to the maximum to enable
higher througput.

< HCI Command: LE Read Maximum Data Length (0x08|0x002f) plen 0
> HCI Event: Command Complete (0x0e) plen 12
      LE Read Maximum Data Length (0x08|0x002f) ncmd 1
        Status: Success (0x00)
        Max TX octets: 251
        Max TX time: 2120
        Max RX octets: 251
        Max RX time: 2120

< HCI Command: LE Read Suggested Default Data Length (0x08|0x0023) plen 0
> HCI Event: Command Complete (0x0e) plen 8
      LE Read Suggested Default Data Length (0x08|0x0023) ncmd 1
        Status: Success (0x00)
        TX octets: 27
        TX time: 328

< HCI Command: LE Write Suggested Default Data Length (0x08|0x0024) plen 4
        TX octets: 251
        TX time: 2120
> HCI Event: Command Complete (0x0e) plen 4
      LE Write Suggested Default Data Length (0x08|0x0024) ncmd 1
        Status: Success (0x00)

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
Marcel Holtmann 2017-05-01 21:43:24 -07:00
parent 86a6129ae2
commit 122048752e
1 changed files with 9 additions and 0 deletions
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9
net/bluetooth/hci_core.c
View File

@ -771,6 +771,15 @@ static int hci_init4_req(struct hci_request *req, unsigned long opt)
sizeof(support), &support);
}
/* Set Suggested Default Data Length to maximum if supported */
if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) {
struct hci_cp_le_write_def_data_len cp;
cp.tx_len = hdev->le_max_tx_len;
cp.tx_time = hdev->le_max_tx_time;
hci_req_add(req, HCI_OP_LE_WRITE_DEF_DATA_LEN, sizeof(cp), &cp);
}
return 0;
}