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USB: cp210x: increase the bulk-out buffer size to 256 byte
author
Johan Hovold
<jhovold@gmail.com>
Wed, 17 Mar 2010 22:00:38 +0000
(23:00 +0100)
committer
Greg Kroah-Hartman
<gregkh@suse.de>
Thu, 20 May 2010 20:21:33 +0000
(13:21 -0700)
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
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diff --git
a/drivers/usb/serial/cp210x.c
b/drivers/usb/serial/cp210x.c
index
ec9b044
..
e344000
100644
(file)
--- 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,