zd1211rw: use async urb for write command

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Writing beacon to device happen through multiple write command calls.
zd_usb_iowrite16v uses synchronous urb call and with multiple write
commands in row causes high CPU usage.

This patch makes zd_usb_iowrite16v use asynchronous urb submit within
zd_usb.c. zd_usb_iowrite16v_async_start is used to initiate writing
multiple commands to device using zd_usb_iowrite16v_async. Each URB
is delayed and submitted to device by next zd_usb_iowrite16v_async
call or by call to zd_usb_iowrite16v_async_end. URBs submitted by
zd_usb_iowrite16v_async have URB_NO_INTERRUPT set and last URB
send by zd_usb_iowrite16v_async_end does not. This lower CPU
usage when doing writes that require multiple URBs.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

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This commit is contained in:

Jussi Kivilinna 2011-02-12 20:43:32 +02:00 • committed by John W. Linville

parent 37939810b9

commit eefdbec1ea

2 changed files with 142 additions and 25 deletions

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162

drivers/net/wireless/zd1211rw/zd_usb.c

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5

drivers/net/wireless/zd1211rw/zd_usb.h

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