linux/include
Johannes Berg 34e895075e mac80211: allow station add/remove to sleep
Many drivers would like to sleep during station
addition and removal, and currently have a high
complexity there from not being able to.

This introduces two new callbacks sta_add() and
sta_remove() that drivers can implement instead
of using sta_notify() and that can sleep, and
the new sta_add() callback is also allowed to
fail.

The reason we didn't do this previously is that
the IBSS code wants to insert stations from the
RX path, which is a tasklet, so cannot sleep.
This patch will keep the station allocation in
that path, but moves adding the station to the
driver out of line. Since the addition can now
fail, we can have IBSS peer structs the driver
rejected -- in that case we still talk to the
station but never tell the driver about it in
the control.sta pointer. If there will ever be
a driver that has a low limit on the number of
stations and that cannot talk to any stations
that are not known to it, we need to do come up
with a new strategy of handling larger IBSSs,
maybe quicker expiry or rejecting peers.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2010-02-08 16:50:53 -05:00
..
acpi
asm-generic Merge branch 'for-2.6.33' of git://git.kernel.dk/linux-2.6-block 2009-12-08 08:19:16 -08:00
crypto
drm
keys
linux mac80211: Account HT Control field in Data frame hdrlen according to 802.11n-2009 2010-01-22 16:11:27 -05:00
math-emu
media
mtd
net mac80211: allow station add/remove to sleep 2010-02-08 16:50:53 -05:00
pcmcia Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6 2009-12-05 09:42:59 -08:00
rdma
rxrpc
scsi [SCSI] fix async scan add/remove race resulting in an oops 2009-11-26 09:43:39 -06:00
sound Merge branch 'topic/hda' into for-linus 2009-12-04 16:22:45 +01:00
trace Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-12-05 15:30:21 -08:00
video pxa168fb: remove useless vsync/hsync invert flag 2009-12-01 09:02:32 +08:00
xen
Kbuild