From d4e598f65de351eb66a90889d9ceaaca472fda40 Mon Sep 17 00:00:00 2001
From: Johan Hovold <jhovold@gmail.com>
Date: Wed, 17 Mar 2010 23:00:38 +0100
Subject: [PATCH] USB: cp210x: increase the bulk-out buffer size to 256 byte
Increase the bulk-out buffer size from 64 to 256 byte.
This gives a significant increase in throughput already at 1Mbaud
(e.g. 710 instead of 640 KB/s) as well as lowered CPU usage.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/usb/serial/cp210x.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c
index ec9b0449ccf66..e3440003810e4 100644
--- a/drivers/usb/serial/cp210x.c
+++ b/drivers/usb/serial/cp210x.c
@@ -138,6 +138,7 @@ static struct usb_serial_driver cp210x_device = {
.usb_driver = &cp210x_driver,
.id_table = id_table,
.num_ports = 1,
+ .bulk_out_size = 256,
.open = cp210x_open,
.close = cp210x_close,
.break_ctl = cp210x_break_ctl,
--
2.30.2