1
linux/net
Johannes Berg 5cff20e6c5 mac80211: tell driver when idle
When we aren't doing anything in mac80211, we can turn off
much of the hardware, depending on the driver/hw. Not doing
anything, aka being idle, means:

 * no monitor interfaces
 * no AP/mesh/wds interfaces
 * any station interfaces are in DISABLED state
 * any IBSS interfaces aren't trying to be in a network
 * we aren't trying to scan

By creating a new function that verifies these conditions and calling
it at strategic points where the states of those conditions change,
we can easily make mac80211 tell the driver when we are idle to save
power.

Additionally, this fixes a small quirk where a recalculated powersave
state is passed to the driver even if the hardware is about to stopped
completely.

This patch intentionally doesn't touch radio_enabled because that is
currently implemented to be a soft rfkill which is inappropriate here
when we need to be able to wake up with low latency.

One thing I'm not entirely sure about is this:

  phy0: device no longer idle - in use
  wlan0: direct probe to AP 00:11:24:91:07:4d try 1
  wlan0 direct probe responded
  wlan0: authenticate with AP 00:11:24:91:07:4d
  wlan0: authenticated
> phy0: device now idle
> phy0: device no longer idle - in use
  wlan0: associate with AP 00:11:24:91:07:4d
  wlan0: RX AssocResp from 00:11:24:91:07:4d (capab=0x401 status=0 aid=1)
  wlan0: associated

Is it appropriate to go into idle state for a short time when we have
just authenticated, but not associated yet? This happens only with the
userspace SME, because we cannot really know how long it will wait
before asking us to associate. Would going idle after a short timeout
be more appropriate? We may need to revisit this, depending on what
happens.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-05-06 15:14:51 -04:00
..
9p
802 tr: fix leakage of device in net/802/tr.c 2009-04-11 01:43:17 -07:00
8021q Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-04-29 20:30:35 -07:00
appletalk proc 2/2: remove struct proc_dir_entry::owner 2009-03-31 01:14:44 +04:00
atm Subject: [PATCH] br2684: restore net_dev initialization 2009-05-02 13:49:36 -07:00
ax25 ax25: proc uid file misses header 2009-04-20 02:14:59 -07:00
bluetooth Bluetooth: Fix connection establishment with low security requirement 2009-04-28 09:31:39 -07:00
bridge netfilter: bridge: allow fragmentation of VLAN packets traversing a bridge 2009-04-20 17:12:35 +02:00
can can: Network Drop Monitor: Make use of consume_skb() in af_can.c 2009-04-17 01:38:46 -07:00
core netns 2/2: extract net_create() 2009-05-04 11:12:14 -07:00
dcb
dccp
decnet net/*: use linux/kernel.h swap() 2009-03-21 13:36:17 -07:00
dsa dsa: add switch chip cascading support 2009-03-21 19:06:54 -07:00
econet
ethernet
ipv4 tcp: extend ECN sysctl to allow server-side only ECN 2009-05-04 11:07:36 -07:00
ipv6 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2009-04-29 20:30:35 -07:00
ipx ipx: use constant for strings and desciptor 2009-03-21 19:06:51 -07:00
irda proc tty: switch ircomm to ->proc_fops 2009-04-01 08:59:10 -07:00
iucv af_iucv: Fix merge. 2009-04-23 06:37:16 -07:00
key
lapb
llc proc 2/2: remove struct proc_dir_entry::owner 2009-03-31 01:14:44 +04:00
mac80211 mac80211: tell driver when idle 2009-05-06 15:14:51 -04:00
netfilter xt_socket: checks for the state of nf_conntrack 2009-05-01 15:23:10 -07:00
netlabel netlabel: Always remove the correct address selector 2009-04-22 00:46:09 -07:00
netlink Merge branch 'master' of /home/davem/src/GIT/linux-2.6/ 2009-03-26 15:23:24 -07:00
netrom net/netrom: Fix socket locking 2009-04-22 00:49:51 -07:00
packet packet: avoid warnings when high-order page allocation fails 2009-04-15 03:39:52 -07:00
phonet trivial: fix typos/grammar errors in Kconfig texts 2009-03-30 15:22:01 +02:00
rds ERR_PTR() dereference in net/rds/ib.c 2009-04-09 17:21:22 -07:00
rfkill net/rfkill/rfkill.c: fix build with CONFIG_RFKILL_LEDS=n 2009-05-06 15:14:40 -04:00
rose Revert "rose: zero length frame filtering in af_rose.c" 2009-04-14 20:28:00 -07:00
rxrpc
sched net: Only store high 16 bits of kernel generated filter priorities 2009-05-02 13:48:32 -07:00
sctp sctp: add feature bit for SCTP offload in hardware 2009-04-28 01:53:14 -07:00
sunrpc Merge branch 'for-2.6.30' of git://linux-nfs.org/~bfields/linux 2009-04-06 13:25:56 -07:00
tipc tipc: fix non-const printf format arguments 2009-03-18 19:11:29 -07:00
unix New helper - current_umask() 2009-03-31 23:00:26 -04:00
wanrouter
wimax rfkill: remove user_claim stuff 2009-04-22 16:54:27 -04:00
wireless cfg80211: Use the correct IE buffer pointer 2009-05-06 15:14:44 -04:00
x25 af_rose/x25: Sanity check the maximum user frame size 2009-03-27 00:28:21 -07:00
xfrm xfrm: wrong hash value for temporary SA 2009-04-27 02:58:59 -07:00
compat.c
Kconfig trivial: fix typos/grammar errors in Kconfig texts 2009-03-30 15:22:01 +02:00
Makefile
nonet.c
socket.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2009-04-06 18:05:43 -07:00
sysctl_net.c net: sysctl_net - use net_eq to compare nets 2009-03-16 16:23:30 +01:00
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