rt2x00: Decrease association time for USB devices
authorIvo van Doorn <IvDoorn@gmail.com>
Mon, 18 Apr 2011 13:31:02 +0000 (15:31 +0200)
committerJohn W. Linville <linville@tuxdriver.com>
Tue, 19 Apr 2011 19:39:37 +0000 (15:39 -0400)
commit152a599274b15028604e24ae2d9c9d7f49853977
tree79beecad25449bac7b6f39b6134a267388ad7878
parentf0187a1987ed6524518ff2a533eaf8394ac1a500
rt2x00: Decrease association time for USB devices

When powersaving is enabled, assocaition times are very high
(for WPA2 networks, the time can easily be around the 3 seconds).

This is caused, because the flushing of the queues takes
too much time. Without the flushing callback mac80211 assumes
a timeout of 100ms while scanning. Limit all flush waiting
loops to the same maximum.

We can apply this maximum by passing the drop status to the
driver, which makes sure the driver performs extra actions
during the waiting for the queue to become empty.

After these changes, association times fall within the
healthy range of ~0.6 seconds with powersaving enabled.
The difference between association time between powersaving
enabled and disabled is now only ~0.1 second (which can also
be due to the measuring method).

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
drivers/net/wireless/rt2x00/rt2400pci.c
drivers/net/wireless/rt2x00/rt2500pci.c
drivers/net/wireless/rt2x00/rt2800pci.c
drivers/net/wireless/rt2x00/rt2x00.h
drivers/net/wireless/rt2x00/rt2x00pci.c
drivers/net/wireless/rt2x00/rt2x00pci.h
drivers/net/wireless/rt2x00/rt2x00queue.c
drivers/net/wireless/rt2x00/rt2x00usb.c
drivers/net/wireless/rt2x00/rt2x00usb.h
drivers/net/wireless/rt2x00/rt61pci.c