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USB: pl2303: increase the bulk-out buffer size to 256 byte
authorJohan Hovold <jhovold@gmail.com>
Wed, 17 Mar 2010 22:00:40 +0000 (23:00 +0100)
committerGreg Kroah-Hartman <gregkh@suse.de>
Thu, 20 May 2010 20:21:33 +0000 (13:21 -0700)
commit3efeaff6298290b36499532f0b4c87aa4bae8aef
treeaed09e1c4d7f99e593df3ebc028f6c1521dc734atree | snapshot
parentaea006b93a59864473866e4b1bdb51deea593798commit | diff
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>
drivers/usb/serial/pl2303.c diff | blob | history
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