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USB: visor: increase bulk-out buffer size

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Increase the bulk-out buffer size to avoid any regression in throughput
after replacing the old writing scheme which used dynamic buffers (e.g.
up to 2k).

256b has been determined to be a good choice for several drivers
including ftdi_sio which used to have a more or less identical write
implementation.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Johan Hovold 2010-05-16 15:06:55 +02:00 committed by Greg Kroah-Hartman
parent 2afd8287c6
commit 9a1f298f8b
1 changed files with 3 additions and 0 deletions
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3
drivers/usb/serial/visor.c
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@ -186,6 +186,7 @@ static struct usb_serial_driver handspring_device = {
.usb_driver = &visor_driver, .usb_driver = &visor_driver,
.id_table = id_table, .id_table = id_table,
.num_ports = 2, .num_ports = 2,
.bulk_out_size = 256,
.open = visor_open, .open = visor_open,
.close = visor_close, .close = visor_close,
.throttle = usb_serial_generic_throttle, .throttle = usb_serial_generic_throttle,
@ -206,6 +207,7 @@ static struct usb_serial_driver clie_5_device = {
.usb_driver = &visor_driver, .usb_driver = &visor_driver,
.id_table = clie_id_5_table, .id_table = clie_id_5_table,
.num_ports = 2, .num_ports = 2,
.bulk_out_size = 256,
.open = visor_open, .open = visor_open,
.close = visor_close, .close = visor_close,
.throttle = usb_serial_generic_throttle, .throttle = usb_serial_generic_throttle,
@ -226,6 +228,7 @@ static struct usb_serial_driver clie_3_5_device = {
.usb_driver = &visor_driver, .usb_driver = &visor_driver,
.id_table = clie_id_3_5_table, .id_table = clie_id_3_5_table,
.num_ports = 1, .num_ports = 1,
.bulk_out_size = 256,
.open = visor_open, .open = visor_open,
.close = visor_close, .close = visor_close,
.throttle = usb_serial_generic_throttle, .throttle = usb_serial_generic_throttle,