USB: visor: increase bulk-out buffer size (9a1f298f) · Commits · 戴 / test

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>

drivers/usb/serial/visor.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -186,6 +186,7 @@ static struct usb_serial_driver handspring_device = {
		.usb_driver = &visor_driver,
		.id_table = id_table,
		.num_ports = 2,
		.bulk_out_size = 256,
		.open = visor_open,
		.close = visor_close,
		.throttle = usb_serial_generic_throttle,
		@@ -206,6 +207,7 @@ static struct usb_serial_driver clie_5_device = {
		.usb_driver = &visor_driver,
		.id_table = clie_id_5_table,
		.num_ports = 2,
		.bulk_out_size = 256,
		.open = visor_open,
		.close = visor_close,
		.throttle = usb_serial_generic_throttle,
		@@ -226,6 +228,7 @@ static struct usb_serial_driver clie_3_5_device = {
		.usb_driver = &visor_driver,
		.id_table = clie_id_3_5_table,
		.num_ports = 1,
		.bulk_out_size = 256,
		.open = visor_open,
		.close = visor_close,
		.throttle = usb_serial_generic_throttle,

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