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authorJohan Hovold <jhovold@gmail.com>2010-03-17 23:00:40 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2010-05-20 13:21:33 -0700
commit3efeaff6298290b36499532f0b4c87aa4bae8aef (patch)
treeaed09e1c4d7f99e593df3ebc028f6c1521dc734a
parentaea006b93a59864473866e4b1bdb51deea593798 (diff)
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op-kernel-dev-3efeaff6298290b36499532f0b4c87aa4bae8aef.tar.gz
USB: pl2303: increase the bulk-out buffer size to 256 byte
Increase the bulk-out buffer size from 64 to 256 byte. This gives a significant increase in throughput already at 1Mbaud as well as lowered CPU usage. The buffer is big enough to keep up also at 3Mbaud (128b would not suffice). 64b 256b 921k: 640 KB/s 870 KB/s 3M: 640 KB/s 2520 KB/s Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--drivers/usb/serial/pl2303.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index b10b0ef..03fe472f 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -1170,6 +1170,7 @@ static struct usb_serial_driver pl2303_device = {
.id_table = id_table,
.usb_driver = &pl2303_driver,
.num_ports = 1,
+ .bulk_out_size = 256,
.open = pl2303_open,
.close = pl2303_close,
.dtr_rts = pl2303_dtr_rts,
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