From: Johan Hovold <jhovold@gmail.com>
To: Greg Kroah-Hartman <gregkh@suse.de>
Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
Johan Hovold <jhovold@gmail.com>
Subject: [PATCH 2/9] USB: cp210x: increase the bulk-out buffer size to 256 byte
Date: Wed, 17 Mar 2010 23:00:38 +0100 [thread overview]
Message-ID: <1268863245-17230-3-git-send-email-jhovold@gmail.com> (raw)
In-Reply-To: <1268863245-17230-1-git-send-email-jhovold@gmail.com>
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>
---
drivers/usb/serial/cp210x.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c
index ec9b044..e344000 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,
--
1.7.0.2
next prev parent reply other threads:[~2010-03-17 22:08 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-17 22:00 [PATCH 0/9] USB: serial: generic driver fixes and bulk buffer feature Johan Hovold
2010-03-17 22:00 ` [PATCH 1/9] USB: serial: allow drivers to define bulk buffer sizes Johan Hovold
2010-03-17 22:00 ` Johan Hovold [this message]
2010-03-17 22:00 ` [PATCH 3/9] USB: cp210x: increase bulk-in buffer size to 256 byte Johan Hovold
2010-03-17 22:00 ` [PATCH 4/9] USB: pl2303: increase the bulk-out " Johan Hovold
2010-03-17 22:00 ` [PATCH 5/9] USB: pl2303: increase bulk-in " Johan Hovold
2010-03-17 22:00 ` [PATCH 6/9] USB: serial: fix generic chars_in_buffer Johan Hovold
2010-03-17 22:00 ` [PATCH 7/9] USB: serial: fix missing locking on fifo in write callback Johan Hovold
2010-03-17 22:00 ` [PATCH 8/9] USB: serial: clear fifo on close Johan Hovold
2010-03-17 22:00 ` [PATCH 9/9] USB: serial: refactor generic close Johan Hovold
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