USB: cp210x: increase the bulk-out buffer size to 256 byte
authorJohan Hovold <jhovold@gmail.com>
Wed, 17 Mar 2010 22:00:38 +0000 (23:00 +0100)
committerGreg 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

index ec9b0449ccf6658bbd013ef3a18989a34f1afcf2..e3440003810e4b8ddd73376b9cdd9f9540d14e50 100644 (file)
@@ -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,