diff options
| author | Jussi Kivilinna <jussi.kivilinna@mbnet.fi> | 2011-02-12 20:43:32 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2011-02-14 15:51:21 -0500 |
| commit | eefdbec1ea8b7093d2c09d1825f68438701723cf (patch) | |
| tree | 6dc40b6d25f8dede0522927f48c4a716ff9c88c9 /drivers/net/wireless/zd1211rw/zd_usb.h | |
| parent | 37939810b937aba830dd751291fcdc51cae1a6cb (diff) | |
| download | blackbird-op-linux-eefdbec1ea8b7093d2c09d1825f68438701723cf.tar.gz blackbird-op-linux-eefdbec1ea8b7093d2c09d1825f68438701723cf.zip | |
zd1211rw: use async urb for write command
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>
Diffstat (limited to 'drivers/net/wireless/zd1211rw/zd_usb.h')
| -rw-r--r-- | drivers/net/wireless/zd1211rw/zd_usb.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/net/wireless/zd1211rw/zd_usb.h b/drivers/net/wireless/zd1211rw/zd_usb.h index 2d688f48a34c..929142692063 100644 --- a/drivers/net/wireless/zd1211rw/zd_usb.h +++ b/drivers/net/wireless/zd1211rw/zd_usb.h @@ -217,8 +217,11 @@ struct zd_usb { struct zd_usb_rx rx; struct zd_usb_tx tx; struct usb_interface *intf; + struct usb_anchor submitted_cmds; + struct urb *urb_async_waiting; + int cmd_error; u8 req_buf[64]; /* zd_usb_iowrite16v needs 62 bytes */ - u8 is_zd1211b:1, initialized:1, was_running:1; + u8 is_zd1211b:1, initialized:1, was_running:1, in_async:1; }; #define zd_usb_dev(usb) (&usb->intf->dev) |
