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Commit 290ba200 authored by Vikram Kandukuri's avatar Vikram Kandukuri Committed by Marcel Holtmann
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Bluetooth: Improve USB driver throughput by increasing the frame size 



This patch increases the receive buffer size to HCI_MAX_FRAME_SIZE
which improves the RX throughput considerably.

Tested against BRM/Atheros/CSR USB Dongles with PAN profile using
iperf and chariot. This gave significant (around 40%) increase
in performance (increased from 0.8 to 1.5 Mb/s in Sheld room)

Signed-off-by: default avatarVikram Kandukuri <vikram.kandukuri@atheros.com>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent 981b1414

drivers/bluetooth/btusb.c

+1 −3
Original line number Diff line number Diff line
@@ -301,7 +301,7 @@ static int btusb_submit_bulk_urb(struct hci_dev *hdev, gfp_t mem_flags) 
	struct urb *urb;

	unsigned char *buf;

	unsigned int pipe;

	int err, size;

	int err, size = HCI_MAX_FRAME_SIZE;



	BT_DBG("%s", hdev->name);
@@ -312,8 +312,6 @@ static int btusb_submit_bulk_urb(struct hci_dev *hdev, gfp_t mem_flags) 
	if (!urb)

		return -ENOMEM;



	size = le16_to_cpu(data->bulk_rx_ep->wMaxPacketSize);



	buf = kmalloc(size, mem_flags);

	if (!buf) {

		usb_free_urb(urb);