kernel_optimize_test/include/net
Johannes Berg 8e3bad65a5 mac80211: remove ieee80211_notify_mac
Before ieee80211_notify_mac() was added, it was presented with the
use case of using it to tell mac80211 that the association may
have been lost because the firmware crashed/reset.

Since then, it has also been used by iwlwifi to (slightly) speed
up re-association after resume, a workaround around the fact that
mac80211 has no suspend/resume handling yet. It is also not used
by any other drivers, so clearly it cannot be necessary for "good
enough" suspend/resume.

Unfortunately, the callback suffers from a severe problem: It only
works for station mode. If suspend/resume happens while in IBSS or
any other mode (but station), then the callback is pointless.

Recently, it has created a number of locking issues, first because
it required rtnl locking rather than RCU due to calling sleeping
functions within the critical section, and now because it's called
by iwlwifi from the mac80211 workqueue that may not use the rtnl
because it is flushed under rtnl.
(cf. http://bugzilla.kernel.org/show_bug.cgi?id=12046)

I think, therefore, that we should take a step back, remove it
entirely for now and add the small feature it provided properly.
For suspend and resume we will need to introduce new hooks, and for
the case where the firmware was reset the driver will probably
simply just pretend it has done a suspend/resume cycle to get
mac80211 to reprogram the hardware completely, not just try to
connect to the current AP again in station mode. When doing so, we
will need to take into account locking issues and possibly defer
to schedule_work from within mac80211 for the resume operation,
while the suspend operation must be done directly.

Proper suspend/resume should also not necessarily try to reconnect
to the current AP, the time spent in suspend may have been short
enough to not be disconnected from the AP, mac80211 will detect
that the AP went out of range quickly if it did, and if the
association is lost then the AP will disassoc as soon as a data
frame is sent. We might also take into account WWOL then, and
have mac80211 program the hardware into such a mode where it is
available and requested.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-11-18 17:26:26 -05:00
..
9p 9p: fix sparse warnings 2008-10-22 18:54:47 -05:00
bluetooth include: replace __FUNCTION__ with __func__ 2008-10-16 11:21:30 -07:00
irda include: replace __FUNCTION__ with __func__ 2008-10-16 11:21:30 -07:00
iucv
netfilter netfilter: ctnetlink: remove bogus module dependency between ctnetlink and nf_nat 2008-10-14 11:58:31 -07:00
netns netfilter: netns: use NFPROTO_NUMPROTO instead of NUMPROTO for tables array 2008-10-20 03:31:54 -07:00
phonet Phonet: include generic link-layer header size in MAX_PHONET_HEADER 2008-10-26 23:06:31 -07:00
sctp sctp: Fix to handle SHUTDOWN in SHUTDOWN_RECEIVED state 2008-10-23 01:01:18 -07:00
tc_act pkt_action: add new action skbedit 2008-09-12 16:30:20 -07:00
tipc
act_api.h
addrconf.h netns: Add network namespace argument to rt6_fill_node() and ipv6_dev_get_saddr() 2008-08-14 15:33:21 -07:00
af_rxrpc.h
af_unix.h net: unix: fix inflight counting bug in garbage collector 2008-11-09 11:17:33 -08:00
ah.h
arp.h
atmclip.h
ax25.h
ax88796.h
cfg80211.h cfg80211: show interface type 2008-09-24 16:18:00 -04:00
checksum.h
cipso_ipv4.h cipso: Add support for native local labeling and fixup mapping names 2008-10-10 10:16:34 -04:00
compat.h
datalink.h
dn_dev.h
dn_fib.h
dn_neigh.h
dn_nsp.h
dn_route.h
dn.h
dsa.h dsa: add support for Trailer tagging format 2008-10-08 17:24:16 -07:00
dsfield.h
dst.h net: Kill plain NET_XMIT_BYPASS. 2008-08-04 23:04:08 -07:00
esp.h
fib_rules.h
flow.h ipv4: Loosen source address check on IPv4 output 2008-10-01 07:28:28 -07:00
garp.h
gen_stats.h
genetlink.h
icmp.h
ieee80211_crypt.h
ieee80211_radiotap.h
ieee80211.h include: replace __FUNCTION__ with __func__ 2008-10-16 11:21:30 -07:00
if_inet6.h
inet6_connection_sock.h
inet6_hashtables.h inet: Don't lookup the socket if there's a socket attached to the skb 2008-10-07 12:41:01 -07:00
inet_common.h
inet_connection_sock.h net: more #ifdef CONFIG_COMPAT 2008-08-28 02:53:51 -07:00
inet_ecn.h
inet_frag.h
inet_hashtables.h inet: Don't lookup the socket if there's a socket attached to the skb 2008-10-07 12:41:01 -07:00
inet_sock.h tcp: Port redirection support for TCP 2008-10-01 07:46:49 -07:00
inet_timewait_sock.h ipv4: Implement IP_TRANSPARENT socket option 2008-10-01 07:30:02 -07:00
inetpeer.h
ip6_checksum.h
ip6_fib.h
ip6_route.h netns: Add network namespace argument to rt6_fill_node() and ipv6_dev_get_saddr() 2008-08-14 15:33:21 -07:00
ip6_tunnel.h
ip_fib.h
ip_vs.h include: replace __FUNCTION__ with __func__ 2008-10-16 11:21:30 -07:00
ip.h sysctl: simplify ->strategy 2008-10-16 11:21:47 -07:00
ipcomp.h
ipconfig.h
ipip.h inet: Make tunnel RX/TX byte counters more consistent 2008-10-09 12:03:17 -07:00
ipv6.h ipv6: making ip and icmp statistics per/namespace 2008-10-08 11:16:45 -07:00
ipx.h
iw_handler.h
lapb.h
llc_c_ac.h
llc_c_ev.h
llc_c_st.h
llc_conn.h
llc_if.h
llc_pdu.h
llc_s_ac.h
llc_s_ev.h
llc_s_st.h
llc_sap.h
llc.h
mac80211.h mac80211: remove ieee80211_notify_mac 2008-11-18 17:26:26 -05:00
mip6.h
ndisc.h sysctl: simplify ->strategy 2008-10-16 11:21:47 -07:00
neighbour.h
net_namespace.h netns: add register_pernet_gen_subsys/unregister_pernet_gen_subsys 2008-10-30 23:55:16 -07:00
netdma.h
netevent.h
netlabel.h netlabel: Add configuration support for local labeling 2008-10-10 10:16:34 -04:00
netlink.h Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2008-10-01 06:12:56 -07:00
netrom.h
nexthop.h
p8022.h
pkt_cls.h
pkt_sched.h pkt_sched: Remove the tx queue state check in qdisc_run() 2008-09-23 01:05:56 -07:00
protocol.h
psnap.h
raw.h
rawv6.h
red.h
request_sock.h tcp: Fix kernel panic when calling tcp_v(4/6)_md5_do_lookup 2008-08-06 23:50:04 -07:00
rose.h
route.h ipv4: Conditionally enable transparent flow flag when connecting 2008-10-01 07:35:39 -07:00
rtnetlink.h
sch_generic.h pkt_sched: Fix handling of gso skbs on requeuing 2008-10-06 09:54:39 -07:00
scm.h net: Fix recursive descent in __scm_destroy(). 2008-11-06 13:51:50 -08:00
slhc_vj.h
snmp.h
sock.h lockdep: include/linux/lockdep.h - fix warning in net/bluetooth/af_bluetooth.c 2008-11-13 23:19:10 -08:00
stp.h
syncppp.h
tcp_states.h
tcp.h net: wrap sk->sk_backlog_rcv() 2008-10-07 14:18:42 -07:00
timewait_sock.h
transp_v6.h
udp.h netns: make uplitev6 mib per/namespace 2008-10-07 14:50:06 -07:00
udplite.h
wext.h
wireless.h cfg80211: show interface type 2008-09-24 16:18:00 -04:00
x25.h
x25device.h
xfrm.h xfrm: MIGRATE enhancements (draft-ebalard-mext-pfkey-enhanced-migrate) 2008-10-05 13:33:42 -07:00