linux-2.6
16 years agoMerge branch 'for-2.6.26' of git://neil.brown.name/md
Linus Torvalds [Thu, 3 Jul 2008 01:47:10 +0000 (18:47 -0700)] 
Merge branch 'for-2.6.26' of git://neil.brown.name/md

* 'for-2.6.26' of git://neil.brown.name/md:
  Fix error paths if md_probe fails.
  Don't acknowlege that stripe-expand is complete until it really is.
  Ensure interrupted recovery completed properly (v1 metadata plus bitmap)

16 years agoMerge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc
Linus Torvalds [Thu, 3 Jul 2008 01:45:29 +0000 (18:45 -0700)] 
Merge branch 'merge' of git://git./linux/kernel/git/paulus/powerpc

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
  powerpc/mpc5200: Fix lite5200b suspend/resume
  powerpc/legacy_serial: Bail if reg-offset/shift properties are present
  powerpc/bootwrapper: update for initrd with simpleImage

16 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
Linus Torvalds [Thu, 3 Jul 2008 01:43:16 +0000 (18:43 -0700)] 
Merge git://git./linux/kernel/git/davem/net-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (55 commits)
  net: fib_rules: fix error code for unsupported families
  netdevice: Fix wrong string handle in kernel command line parsing
  net: Tyop of sk_filter() comment
  netlink: Unneeded local variable
  net-sched: fix filter destruction in atm/hfsc qdisc destruction
  net-sched: change tcf_destroy_chain() to clear start of filter list
  ipv4: fix sysctl documentation of time related values
  mac80211: don't accept WEP keys other than WEP40 and WEP104
  hostap: fix sparse warnings
  hostap: don't report useless WDS frames by default
  textsearch: fix Boyer-Moore text search bug
  netfilter: nf_conntrack_tcp: fixing to check the lower bound of valid ACK
  ipv6 route: Convert rt6_device_match() to use RT6_LOOKUP_F_xxx flags.
  netlabel: Fix a problem when dumping the default IPv6 static labels
  net/inet_lro: remove setting skb->ip_summed when not LRO-able
  inet fragments: fix race between inet_frag_find and inet_frag_secret_rebuild
  CONNECTOR: add a proc entry to list connectors
  netlink: Fix some doc comments in net/netlink/attr.c
  tcp: /proc/net/tcp rto,ato values not scaled properly (v2)
  include/linux/netdevice.h: don't export MAX_HEADER to userspace
  ...

16 years agoDRM/i915: only use tiled blits on 965+
Jesse Barnes [Tue, 1 Jul 2008 19:32:52 +0000 (12:32 -0700)] 
DRM/i915: only use tiled blits on 965+

When scheduled swaps occur, we need to blit between front & back
buffers.  If the buffers are tiled, we need to set the appropriate
XY_SRC_COPY tile bit, but only on 965 chips, since it will cause
corruption on pre-965 (e.g. 945).

Bug reported by and fix tested by Tomas Janousek <tomi@nomi.cz>.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Acked-by: Dave Airlie <airlied@linux.ie>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 years agodrivers/input/ff-core.c needs <linux/sched.h>
Geert Uytterhoeven [Tue, 1 Jul 2008 11:55:25 +0000 (13:55 +0200)] 
drivers/input/ff-core.c needs <linux/sched.h>

Commit 656acd2bbc4ce7f224de499ee255698701396c48 ("Input: fix locking in
force-feedback core") causes the following regression on m68k:

| linux/drivers/input/ff-core.c: In function 'input_ff_upload':
| linux/drivers/input/ff-core.c:172: error: dereferencing pointer to incomplete type
| linux/drivers/input/ff-core.c: In function 'erase_effect':
| linux/drivers/input/ff-core.c:197: error: dereferencing pointer to incomplete type
| linux/drivers/input/ff-core.c:204: error: dereferencing pointer to incomplete type
| make[4]: *** [drivers/input/ff-core.o] Error 1

As the incomplete type is `struct task_struct', including <linux/sched.h> fixes
it.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 years agoMerge branch 'for-2.6.26' of git://git.secretlab.ca/git/linux-2.6-mpc52xx into merge
Paul Mackerras [Thu, 3 Jul 2008 00:05:59 +0000 (10:05 +1000)] 
Merge branch 'for-2.6.26' of git://git.secretlab.ca/git/linux-2.6-mpc52xx into merge

16 years agop54: Add quality output to iwlist and iwconfig
Larry.Finger@lwfinger.net [Mon, 30 Jun 2008 15:39:49 +0000 (10:39 -0500)] 
p54: Add quality output to iwlist and iwconfig

The p54 driver family reports a quality of 0 in iwconfig and iwlist
output. This patch calculates a quality number as a percentage of the
rssi to the maximum signal of 127 reported as the maximum signal.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agomac80211: rework debug settings and make debugging safer
Johannes Berg [Mon, 30 Jun 2008 13:10:46 +0000 (15:10 +0200)] 
mac80211: rework debug settings and make debugging safer

This patch reworks the mac80211 debug settings making them more focused
and adding help text for those that didn't have one. It also removes a
number of printks that can be triggered remotely and add no value, e.g.
"too short deauthentication frame received - ignoring".

If somebody really needs to debug that they should just add a monitor
interface and look at the frames in wireshark.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agomac80211: get rid of function pointers in RX path
Johannes Berg [Mon, 30 Jun 2008 13:10:45 +0000 (15:10 +0200)] 
mac80211: get rid of function pointers in RX path

This changes the RX path to no longer use function pointers for
RX handlers but rather invoke them directly. If debugging is
enabled, mark the RX handlers noinline because otherwise they
all get inlined into ieee80211_invoke_rx_handlers() which makes
it harder to see where a bug is.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agomac80211: get rid of function pointers in TX path
Johannes Berg [Mon, 30 Jun 2008 13:10:44 +0000 (15:10 +0200)] 
mac80211: get rid of function pointers in TX path

This changes the TX path to no longer use function pointers for
TX handlers but rather invoke them directly. If debugging is
enabled, mark the TX handlers noinline because otherwise they
all get inlined into invoke_tx_handlers() which makes it harder
to see where a bug is.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwl3945: remove RFKILL_STATE_HARD_BLOCKED warnings
Zhu Yi [Mon, 30 Jun 2008 09:23:32 +0000 (17:23 +0800)] 
iwl3945: remove RFKILL_STATE_HARD_BLOCKED warnings

The patch fixes the compile warning of "enumeration value
‘RFKILL_STATE_HARD_BLOCKED’ not handled in switch".

Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi: fix iwl4965 temperature callback calibration issue
Zhu Yi [Mon, 30 Jun 2008 09:23:31 +0000 (17:23 +0800)] 
iwlwifi: fix iwl4965 temperature callback calibration issue

The patch fixes the temperature calibration issue introduced by the
patch "iwlwifi: move RX stats to core, and move temperature to handler".
It also remove the second parameter "stats" since it is already copied
to priv->statistics.

Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi: enable packet injection for iwl3945
Stefanik Gábor [Mon, 30 Jun 2008 09:23:30 +0000 (17:23 +0800)] 
iwlwifi: enable packet injection for iwl3945

This patch enables packet injection on iwl3945 devices. Tested with
packetspammer and aireplay-ng.

Signed-off-by: Gábor Stefanik <netrolller.3d@gmail.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi: fix incorrect monitor mode operation
Rick Farrington [Mon, 30 Jun 2008 09:23:28 +0000 (17:23 +0800)] 
iwlwifi: fix incorrect monitor mode operation

This patch fixes monitor mode operation for iwlwifi.

Problems addressed:
1. when monitor mode was enabled, multiple, overlapped calls were being
made to 'iwl3945_bg_set_monitor'

2. when monitor mode was disabled (via the configure_filter callback),
the driver was still enabling monitor mode

3. when monitor mode was enabled, the selected channel was not set
(eg. 'iwconfig wlanx mode monitor channel n' DID NOT SET channel 'n'
when packet capture was subsequently enabled)

Signed-off-by: Rick Farrington <rickdic@hotmail.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agolibertas: support USB persistence on suspend/resume (resend)
andrey@cozybit.com [Tue, 1 Jul 2008 18:43:53 +0000 (11:43 -0700)] 
libertas: support USB persistence on suspend/resume (resend)

Handle .reset_resume() so that libertas can survive suspend/resume without
reloading the firmware.

Signed-off-by: Andrey Yurovsky <andrey@cozybit.com>
Acked-by: Deepak Saxena <dsaxena@laptop.org>
Acked-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi: drop skb silently for Tx request in monitor mode
Zhu Yi [Tue, 1 Jul 2008 01:20:34 +0000 (09:20 +0800)] 
iwlwifi: drop skb silently for Tx request in monitor mode

This patch fixes the problem to keep mac80211 resubmitting SKBs
when Tx request cannot be met in monitor mode.

Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi: fix incorrect 5GHz rates reported in monitor mode
Rick Farrington [Tue, 1 Jul 2008 01:20:33 +0000 (09:20 +0800)] 
iwlwifi: fix incorrect 5GHz rates reported in monitor mode

This patch fixes the rates reported in monitor mode operation
(Wireshark) for iwlwifi.

Previously, packets with rates of 6M..24M would be reported
incorrectly and packets with rates of 36M..54M would not passed
up the stack.

Signed-off-by: Rick Farrington <rickdic@hotmail.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoPCI: acpiphp: cleanup notify handler on all root bridges
Alex Chiang [Wed, 2 Jul 2008 02:02:23 +0000 (20:02 -0600)] 
PCI: acpiphp: cleanup notify handler on all root bridges

During the development of the physical PCI slot patch series, Gary Hade
kept on reporting strange oopses due to interactions between pci_slot
and acpiphp.

http://lkml.org/lkml/2007/11/28/319

find_root_bridges() unconditionally installs
handle_hotplug_event_bridge() as an ACPI_SYSTEM_NOTIFY handler for all
root bridges.

However, during module cleanup, remove_bridge() will only remove the
notify handler iff the root bridge had a hot-pluggable slot directly
underneath. That is:

root bridge -> hotplug slot

But, if the topology looks like either of the following:

root bridge -> non-hotplug slot
root bridge -> p2p bridge -> hotplug slot

Then we currently do not remove the notify handler from that root
bridge.

This can cause a kernel oops if we modprobe acpiphp later and it gets
loaded somewhere else in memory. If the root bridge then receives a
hotplug event, it will then attempt to call a stale, non-existent notify
handler and we blow up.

Much thanks goes to Gary Hade for his persistent debugging efforts.

Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Gary Hade <garyhade@us.ibm.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
16 years agoPCI: Limit VPD read/write lengths for Broadcom 5706, 5708, 5709 rev.
Benjamin Li [Wed, 2 Jul 2008 17:59:04 +0000 (10:59 -0700)] 
PCI: Limit VPD read/write lengths for Broadcom 5706, 5708, 5709 rev.

For Broadcom 5706, 5708, 5709 rev. A nics, any read beyond the
VPD end tag will hang the device.  This problem was initially
observed when a vpd entry was created in sysfs
('/sys/bus/pci/devices/<id>/vpd').   A read to this sysfs entry
will dump 32k of data.  Reading a full 32k will cause an access
beyond the VPD end tag causing the device to hang.  Once the device
is hung, the bnx2 driver will not be able to reset the device.
We believe that it is legal to read beyond the end tag and
therefore the solution is to limit the read/write length.

A majority of this patch is from Matthew Wilcox who gave code for
reworking the PCI vpd size information.  A PCI quirk added for the
Broadcom NIC's to limit the read/write's.

Signed-off-by: Benjamin Li <benli@broadcom.com>
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
16 years agoV4L/DVB (8178): uvc: Fix compilation breakage for the other drivers, if uvc is selected
Mauro Carvalho Chehab [Wed, 2 Jul 2008 14:03:33 +0000 (11:03 -0300)] 
V4L/DVB (8178): uvc: Fix compilation breakage for the other drivers, if uvc is selected

UVC makefile defines obj as:
obj-$(CONFIG_USB_VIDEO_CLASS) := uvcvideo.o
Instead of:
obj-$(CONFIG_USB_VIDEO_CLASS) += uvcvideo.o

Due to that, if uvc is selected, all obj-y or obj-m that were added to
compilation were forget. This breaks a proper kernel build.

Acked-by: Laurent Pinchart <laurent.pinchart@skynet.be>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
16 years agoniu: Add support for rx flow hash configuration.
Santwona Behera [Wed, 2 Jul 2008 10:49:11 +0000 (03:49 -0700)] 
niu: Add support for rx flow hash configuration.

Implemented ethtool callback functions for configuring receive flow
hashing in the niu driver.

Signed-off-by: Santwona Behera <santwona.behera@sun.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
16 years agonetdev: Add support for rx flow hash configuration, using ethtool.
Santwona Behera [Wed, 2 Jul 2008 10:47:41 +0000 (03:47 -0700)] 
netdev: Add support for rx flow hash configuration, using ethtool.

Added new interfaces to ethtool to configure receive network flow
distribution across multiple rx rings using hashing.

Signed-off-by: Santwona Behera <santwona.behera@sun.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
16 years agodm crypt: use cond_resched
Milan Broz [Wed, 2 Jul 2008 08:34:28 +0000 (09:34 +0100)] 
dm crypt: use cond_resched

Add cond_resched() to prevent monopolising CPU when processing large bios.

dm-crypt processes encryption of bios in sector units.  If the bio request
is big it can spend a long time in the encryption call.

Signed-off-by: Milan Broz <mbroz@redhat.com>
Tested-by: Yan Li <elliot.li.tech@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
16 years agosctp: Mark GET_PEER|LOCAL_ADDR_OLD deprecated.
Vlad Yasevich [Wed, 2 Jul 2008 03:06:22 +0000 (20:06 -0700)] 
sctp: Mark GET_PEER|LOCAL_ADDR_OLD deprecated.

Socket options SCTP_GET_PEER_ADDR_OLD, SCTP_GET_PEER_ADDR_NUM_OLD,
SCTP_GET_LOCAL_ADDR_OLD, and SCTP_GET_PEER_LOCAL_ADDR_NUM_OLD
have been replaced by newer versions a since 2005.  It's time
to officially deprecate them and schedule them for removal.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
16 years agonet: fib_rules: fix error code for unsupported families
Patrick McHardy [Wed, 2 Jul 2008 02:59:37 +0000 (19:59 -0700)] 
net: fib_rules: fix error code for unsupported families

The errno code returned must be negative.

Fixes "RTNETLINK answers: Unknown error 18446744073709551519".

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
16 years agonetdevice: Fix wrong string handle in kernel command line parsing
Wang Chen [Wed, 2 Jul 2008 02:57:19 +0000 (19:57 -0700)] 
netdevice: Fix wrong string handle in kernel command line parsing

v1->v2: Use strlcpy() to ensure s[i].name be null-termination.

1. In netdev_boot_setup_add(), a long name will leak.
   ex. : dev=21,0x1234,0x1234,0x2345,eth123456789verylongname.........
2. In netdev_boot_setup_check(), mismatch will happen if s[i].name
   is a substring of dev->name.
   ex. : dev=...eth1 dev=...eth11

[ With feedback from Ben Hutchings. ]

Signed-off-by: Wang Chen <wangchen@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
16 years agonet: Tyop of sk_filter() comment
Wang Chen [Wed, 2 Jul 2008 02:55:40 +0000 (19:55 -0700)] 
net: Tyop of sk_filter() comment

Parameter "needlock" no long exists.

Signed-off-by: Wang Chen <wangchen@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
16 years agonetlink: Unneeded local variable
Wang Chen [Wed, 2 Jul 2008 02:55:09 +0000 (19:55 -0700)] 
netlink: Unneeded local variable

We already have a variable, which has the same capability.

Signed-off-by: Wang Chen <wangchen@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
16 years agonet-sched: fix filter destruction in atm/hfsc qdisc destruction
Patrick McHardy [Wed, 2 Jul 2008 02:53:09 +0000 (19:53 -0700)] 
net-sched: fix filter destruction in atm/hfsc qdisc destruction

Filters need to be destroyed before beginning to destroy classes
since the destination class needs to still be alive to unbind the
filter.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
16 years agonet-sched: change tcf_destroy_chain() to clear start of filter list
Patrick McHardy [Wed, 2 Jul 2008 02:52:38 +0000 (19:52 -0700)] 
net-sched: change tcf_destroy_chain() to clear start of filter list

Pass double tcf_proto pointers to tcf_destroy_chain() to make it
clear the start of the filter list for more consistency.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
16 years agoicmp: fix units for ratelimit
Stephen Hemminger [Wed, 2 Jul 2008 02:29:07 +0000 (19:29 -0700)] 
icmp: fix units for ratelimit

Convert the sysctl values for icmp ratelimit to use milliseconds instead
of jiffies which is based on kernel configured HZ.
Internal kernel jiffies are not a proper unit for any userspace API.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
16 years agoipv4: fix sysctl documentation of time related values
Stephen Hemminger [Wed, 2 Jul 2008 00:22:48 +0000 (17:22 -0700)] 
ipv4: fix sysctl documentation of time related values

These sysctl values are time related and all use the same routine
(proc_dointvec_jiffies) that internally converts from seconds to jiffies.
The code is fine, the documentation is just wrong.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
16 years agopowerpc/mpc5200: Fix lite5200b suspend/resume
Tim Yamin [Tue, 17 Jun 2008 08:33:14 +0000 (09:33 +0100)] 
powerpc/mpc5200: Fix lite5200b suspend/resume

Suspend/resume ("echo mem > /sys/power/state") does not work with
vanilla kernels -- the system does not suspend correctly and just
hangs. This patch fixes this so suspend/resume works:

1) of_iomap does not map the whole 0xC000 of the MPC5200 immr so
saving registers does not work.
2) PCI registers need to be saved and restored.

Signed-off-by: Tim Yamin <plasm@roo.me.uk>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
16 years agopowerpc/legacy_serial: Bail if reg-offset/shift properties are present
John Linn [Tue, 1 Jul 2008 17:52:41 +0000 (10:52 -0700)] 
powerpc/legacy_serial: Bail if reg-offset/shift properties are present

The legacy serial driver does not work with an 8250 type UART that is
described in the device tree with the reg-offset and reg-shift
properties.  This change makes legacy_serial ignore these devices.

Signed-off-by: John Linn <john.linn@xilinx.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
16 years agoi2c: Fix bad hint about irqs in i2c.h
Wolfram Sang [Tue, 1 Jul 2008 20:38:18 +0000 (22:38 +0200)] 
i2c: Fix bad hint about irqs in i2c.h

i2c.h mentions -1 as a not-issued irq. This false hint was taken by
of_i2c and caused crashes. Don't give any advice as 'no irq' is not
consistent across all architectures yet and it is not needed internally
by the i2c-core.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
16 years agoi2c: Documentation: fix device matching description
Ben Dooks [Tue, 1 Jul 2008 20:38:18 +0000 (22:38 +0200)] 
i2c: Documentation: fix device matching description

The matching process described for new style clients in
Documentation/i2c/writing-clients is classed as out-of-date
as it requires the presence of an .id_table entry in the
driver's i2c_driver entry.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
16 years agopowerpc/bootwrapper: update for initrd with simpleImage
John Linn [Tue, 1 Jul 2008 20:17:18 +0000 (14:17 -0600)] 
powerpc/bootwrapper: update for initrd with simpleImage

This change to the makefile corrects the build of a simpleImage with initrd.

Signed-off-by: John Linn <john.linn@xilinx>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
16 years agoPCI: Restrict VPD read permission to root
Ben Hutchings [Tue, 1 Jul 2008 16:18:17 +0000 (17:18 +0100)] 
PCI: Restrict VPD read permission to root

Some PCI devices will lock up if we attempt to read from VPD addresses
beyond some device-dependent limit.  Until we can identify these
devices and adjust the file size accordingly, only let root read VPD
through sysfs to prevent a DoS by normal users.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
16 years agoI2C: S3C2410: Add MODULE_ALIAS() for s3c2440 device.
Ben Dooks [Tue, 1 Jul 2008 10:59:43 +0000 (11:59 +0100)] 
I2C: S3C2410: Add MODULE_ALIAS() for s3c2440 device.

Add a MODULE_ALIAS() statement for the i2c-s3c2410 controller
to ensure that it can be autoloaded on the S3C2440 systems that
we support.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
16 years agoI2C: S3C2410: Fixup error codes returned rom a transfer.
Ben Dooks [Tue, 1 Jul 2008 10:59:42 +0000 (11:59 +0100)] 
I2C: S3C2410: Fixup error codes returned rom a transfer.

The driver should be returning -ENXIO for transfers that do not
pass the initial address byte stage.

Note, also small tidyups to the driver comments in the area.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
16 years agoI2C: S3C2410: Check ACK on byte transmission
Ben Dooks [Tue, 1 Jul 2008 10:59:41 +0000 (11:59 +0100)] 
I2C: S3C2410: Check ACK on byte transmission

We should check for the reception of an ACK after transmitting each
data byte. The address send has been correctly checking this, but the
data write byte state should have also been checking for these failures.

As part of the same fix, we remove the ACK checking from the receive
path where it should not have been checking for an ACK which our hardware
was sending.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
16 years agorcu: fix hotplug vs rcu race
Gautham R Shenoy [Fri, 27 Jun 2008 04:47:38 +0000 (10:17 +0530)] 
rcu: fix hotplug vs rcu race

Dhaval Giani reported this warning during cpu hotplug stress-tests:

| On running kernel compiles in parallel with cpu hotplug:
|
| WARNING: at arch/x86/kernel/smp.c:118
| native_smp_send_reschedule+0x21/0x36()
| Modules linked in:
| Pid: 27483, comm: cc1 Not tainted 2.6.26-rc7 #1
| [...]
|  [<c0110355>] native_smp_send_reschedule+0x21/0x36
|  [<c014fe8f>] force_quiescent_state+0x47/0x57
|  [<c014fef0>] call_rcu+0x51/0x6d
|  [<c01713b3>] __fput+0x130/0x158
|  [<c0171231>] fput+0x17/0x19
|  [<c016fd99>] filp_close+0x4d/0x57
|  [<c016fdff>] sys_close+0x5c/0x97

IMHO the warning is a spurious one.

cpu_online_map is updated by the _cpu_down() using stop_machine_run().
Since force_quiescent_state is invoked from irqs disabled section,
stop_machine_run() won't be executing while a cpu is executing
force_quiescent_state(). Hence the cpu_online_map is stable while we're
in the irq disabled section.

However, a cpu might have been offlined _just_ before we disabled irqs
while entering force_quiescent_state(). And rcu subsystem might not yet
have handled the CPU_DEAD notification, leading to the offlined cpu's
bit being set in the rcp->cpumask.

Hence cpumask = (rcp->cpumask & cpu_online_map) to prevent sending
smp_reschedule() to an offlined CPU.

Here's the timeline:

CPU_A  CPU_B
--------------------------------------------------------------
cpu_down(): .
.     .
. .
stop_machine(): /* disables preemption, .
 * and irqs */ .
. .
. .
take_cpu_down(); .
. .
. .
. .
cpu_disable(); /*this removes cpu  .
*from cpu_online_map  .
*/ .
. .
. .
restart_machine(); /* enables irqs */ .
------WINDOW DURING WHICH rcp->cpumask is stale ---------------
. call_rcu();
. /* disables irqs here */
. .force_quiescent_state();
.CPU_DEAD: .for_each_cpu(rcp->cpumask)
. .   smp_send_reschedule();
. .
. .   WARN_ON() for offlined CPU!
.
.
.
rcu_cpu_notify:
.
-------- WINDOW ENDS ------------------------------------------
rcu_offline_cpu() /* Which calls cpu_quiet()
   * which removes
   * cpu from rcp->cpumask.
   */

If a new batch was started just before calling stop_machine_run(), the
"tobe-offlined" cpu is still present in rcp-cpumask.

During a cpu-offline, from take_cpu_down(), we queue an rt-prio idle
task as the next task to be picked by the scheduler. We also call
cpu_disable() which will disable any further interrupts and remove the
cpu's bit from the cpu_online_map.

Once the stop_machine_run() successfully calls take_cpu_down(), it calls
schedule(). That's the last time a schedule is called on the offlined
cpu, and hence the last time when rdp->passed_quiesc will be set to 1
through rcu_qsctr_inc().

But the cpu_quiet() will be on this cpu will be called only when the
next RCU_SOFTIRQ occurs on this CPU. So at this time, the offlined CPU
is still set in rcp->cpumask.

Now coming back to the idle_task which truely offlines the CPU, it does
check for a pending RCU and raises the softirq, since it will find
rdp->passed_quiesc to be 0 in this case. However, since the cpu is
offline I am not sure if the softirq will trigger on the CPU.

Even if it doesn't the rcu_offline_cpu() will find that rcp->completed
is not the same as rcp->cur, which means that our cpu could be holding
up the grace period progression. Hence we call cpu_quiet() and move
ahead.

But because of the window explained in the timeline, we could still have
a call_rcu() before the RCU subsystem executes it's CPU_DEAD
notification, and we send smp_send_reschedule() to offlined cpu while
trying to force the quiescent states. The appended patch adds comments
and prevents checking for offlined cpu everytime.

cpu_online_map is updated by the _cpu_down() using stop_machine_run().
Since force_quiescent_state is invoked from irqs disabled section,
stop_machine_run() won't be executing while a cpu is executing
force_quiescent_state(). Hence the cpu_online_map is stable while we're
in the irq disabled section.

Reported-by: Dhaval Giani <dhaval@linux.vnet.ibm.com>
Signed-off-by: Gautham R Shenoy <ego@in.ibm.com>
Acked-by: Dhaval Giani <dhaval@linux.vnet.ibm.com>
Cc: Dipankar Sarma <dipankar@in.ibm.com>
Cc: laijs@cn.fujitsu.com
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Rusty Russel <rusty@rustcorp.com.au>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoProperly notify block layer of sync writes
Jens Axboe [Tue, 1 Jul 2008 07:07:34 +0000 (09:07 +0200)] 
Properly notify block layer of sync writes

fsync_buffers_list() and sync_dirty_buffer() both issue async writes and
then immediately wait on them. Conceptually, that makes them sync writes
and we should treat them as such so that the IO schedulers can handle
them appropriately.

This patch fixes a write starvation issue that Lin Ming reported, where
xx is stuck for more than 2 minutes because of a large number of
synchronous IO in the system:

INFO: task kjournald:20558 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
kjournald     D ffff810010820978  6712 20558      2
ffff81022ddb1d10 0000000000000046 ffff81022e7baa10 ffffffff803ba6f2
ffff81022ecd0000 ffff8101e6dc9160 ffff81022ecd0348 000000008048b6cb
0000000000000086 ffff81022c4e8d30 0000000000000000 ffffffff80247537
Call Trace:
[<ffffffff803ba6f2>] kobject_get+0x12/0x17
[<ffffffff80247537>] getnstimeofday+0x2f/0x83
[<ffffffff8029c1ac>] sync_buffer+0x0/0x3f
[<ffffffff8066d195>] io_schedule+0x5d/0x9f
[<ffffffff8029c1e7>] sync_buffer+0x3b/0x3f
[<ffffffff8066d3f0>] __wait_on_bit+0x40/0x6f
[<ffffffff8029c1ac>] sync_buffer+0x0/0x3f
[<ffffffff8066d48b>] out_of_line_wait_on_bit+0x6c/0x78
[<ffffffff80243909>] wake_bit_function+0x0/0x23
[<ffffffff8029e3ad>] sync_dirty_buffer+0x98/0xcb
[<ffffffff8030056b>] journal_commit_transaction+0x97d/0xcb6
[<ffffffff8023a676>] lock_timer_base+0x26/0x4b
[<ffffffff8030300a>] kjournald+0xc1/0x1fb
[<ffffffff802438db>] autoremove_wake_function+0x0/0x2e
[<ffffffff80302f49>] kjournald+0x0/0x1fb
[<ffffffff802437bb>] kthread+0x47/0x74
[<ffffffff8022de51>] schedule_tail+0x28/0x5d
[<ffffffff8020cac8>] child_rip+0xa/0x12
[<ffffffff80243774>] kthread+0x0/0x74
[<ffffffff8020cabe>] child_rip+0x0/0x12

Lin Ming confirms that this patch fixes the issue. I've run tests with
it for the past week and no ill effects have been observed, so I'm
proposing it for inclusion into 2.6.26.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
16 years agoblock: Fix the starving writes bug in the anticipatory IO scheduler
Divyesh Shah [Mon, 16 Jun 2008 16:37:08 +0000 (18:37 +0200)] 
block: Fix the starving writes bug in the anticipatory IO scheduler

AS scheduler alternates between issuing read and write batches. It does
the batch switch only after all requests from the previous batch are
completed.

When switching to a write batch, if there is an on-going read request,
it waits for its completion and indicates its intention of switching by
setting ad->changed_batch and the new direction but does not update the
batch_expire_time for the new write batch which it does in the case of
no previous pending requests.
On completion of the read request, it sees that we were waiting for the
switch and schedules work for kblockd right away and resets the
ad->changed_data flag.
Now when kblockd enters dispatch_request where it is expected to pick
up a write request, it in turn ends the write batch because the
batch_expire_timer was not updated and shows the expire timestamp for
the previous batch.

This results in the write starvation for all the cases where there is
the intention for switching to a write batch, but there is a previous
in-flight read request and the batch gets reverted to a read_batch
right away.

This also holds true in the reverse case (switching from a write batch
to a read batch with an in-flight write request).

I've checked that this bug exists on 2.6.11, 2.6.18, 2.6.24 and
linux-2.6-block git HEAD. I've tested the fix on x86 platforms with
SCSI drives where the driver asks for the next request while a current
request is in-flight.

This patch is based off linux-2.6-block git HEAD.

Bug reproduction:
A simple scenario which reproduces this bug is:
- dd if=/dev/hda3 of=/dev/null &
- lilo
   The lilo takes forever to complete.

This can also be reproduced fairly easily with the earlier dd and
another test
program doing msync().

The example test program below should print out a message after every
iteration
but it simply hangs forever. With this bugfix it makes forward progress.

====
Example test program using msync() (thanks to suleiman AT google DOT
com)

inline uint64_t
rdtsc(void)
{
         int64_t tsc;

         __asm __volatile("rdtsc" : "=A" (tsc));
         return (tsc);
}

int
main(int argc, char **argv)
{
         struct stat st;
         uint64_t e, s, t;
         char *p, q;
         long i;
         int fd;

         if (argc < 2) {
                 printf("Usage: %s <file>\n", argv[0]);
                 return (1);
         }

         if ((fd = open(argv[1], O_RDWR | O_NOATIME)) < 0)
                 err(1, "open");

         if (fstat(fd, &st) < 0)
                 err(1, "fstat");

         p = mmap(NULL, st.st_size, PROT_READ | PROT_WRITE,
MAP_SHARED, fd, 0);

         t = 0;
         for (i = 0; i < 1000; i++) {
                 *p = 0;
                 msync(p, 4096, MS_SYNC);
                 s = rdtsc();
                *p = 0;
                 __asm __volatile(""::: "memory");
                 e = rdtsc();
                 if (argc > 2)
                         printf("%d: %lld cycles %jd %jd\n",
                                i, e - s, (intmax_t)s, (intmax_t)e);
                 t += e - s;
         }
         printf("average time: %lld cycles\n", t / 1000);
         return (0);
}

Cc: <stable@kernel.org>
Acked-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
16 years agox86: fix NODES_SHIFT Kconfig range
Thomas Gleixner [Tue, 1 Jul 2008 06:56:32 +0000 (08:56 +0200)] 
x86: fix NODES_SHIFT Kconfig range

commit 4323838215184f5a2f081e0d17b8d60731b03164
       x86: change size of node ids from u8 to s16

set the range for NODES_SHIFT to 1..15.

The possible range is 1..9

Fixes Bugzilla #10726

Reported-by: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
16 years agosched: fix divide error when trying to configure rt_period to zero
Raistlin [Thu, 26 Jun 2008 16:54:09 +0000 (18:54 +0200)] 
sched: fix divide error when trying to configure rt_period to zero

Here it is another little Oops we found while configuring invalid values
via cgroups:

echo 0 > /dev/cgroups/0/cpu.rt_period_us
or
echo 4294967296 > /dev/cgroups/0/cpu.rt_period_us

[  205.509825] divide error: 0000 [#1]
[  205.510151] Modules linked in:
[  205.510151]
[  205.510151] Pid: 2339, comm: bash Not tainted (2.6.26-rc8 #33)
[  205.510151] EIP: 0060:[<c030c6ef>] EFLAGS: 00000293 CPU: 0
[  205.510151] EIP is at div64_u64+0x5f/0x70
[  205.510151] EAX: 0000389f EBX: 00000000 ECX: 00000000 EDX: 00000000
[  205.510151] ESI: d9800000 EDI: 00000000 EBP: c6cede60 ESP: c6cede50
[  205.510151]  DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068
[  205.510151] Process bash (pid: 2339, ti=c6cec000 task=c79be370 task.ti=c6cec000)
[  205.510151] Stack: d9800000 0000389f c05971a0 d9800000 c6cedeb4 c0214dbd 00000000 00000000
[  205.510151]        c6cede88 c0242bd8 c05377c0 c7a41b40 00000000 00000000 00000000 c05971a0
[  205.510151]        c780ed20 c7508494 c7a41b40 00000000 00000002 c6cedebc c05971a0 ffffffea
[  205.510151] Call Trace:
[  205.510151]  [<c0214dbd>] ? __rt_schedulable+0x1cd/0x240
[  205.510151]  [<c0242bd8>] ? cgroup_file_open+0x18/0xe0
[  205.510151]  [<c0214fe4>] ? tg_set_bandwidth+0xa4/0xf0
[  205.510151]  [<c0215066>] ? sched_group_set_rt_period+0x36/0x50
[  205.510151]  [<c021508e>] ? cpu_rt_period_write_uint+0xe/0x10
[  205.510151]  [<c0242dc5>] ? cgroup_file_write+0x125/0x160
[  205.510151]  [<c0232c15>] ? hrtimer_interrupt+0x155/0x190
[  205.510151]  [<c02f047f>] ? security_file_permission+0xf/0x20
[  205.510151]  [<c0277ad8>] ? rw_verify_area+0x48/0xc0
[  205.510151]  [<c0283744>] ? dupfd+0x104/0x130
[  205.510151]  [<c027838c>] ? vfs_write+0x9c/0x160
[  205.510151]  [<c0242ca0>] ? cgroup_file_write+0x0/0x160
[  205.510151]  [<c027850d>] ? sys_write+0x3d/0x70
[  205.510151]  [<c0203019>] ? sysenter_past_esp+0x6a/0x91
[  205.510151]  =======================
[  205.510151] Code: 0f 45 de 31 f6 0f ad d0 d3 ea f6 c1 20 0f 45 c2 0f 45 d6 89 45 f0 89 55 f4 8b 55 f4 31 c9 8b 45 f0 39 d3 89 c6 77 08 89 d0 31 d2 <f7> f3 89 c1 83 c4 08 89 f0 f7 f3 89 ca 5b 5e 5d c3 55 89 e5 56
[  205.510151] EIP: [<c030c6ef>] div64_u64+0x5f/0x70 SS:ESP 0068:c6cede50

The attached patch solves the issue for me.

I'm checking as soon as possible for the period not being zero since, if
it is, going ahead is useless. This way we also save a mutex_lock() and
a read_lock() wrt doing it inside tg_set_bandwidth() or
__rt_schedulable().

Signed-off-by: Dario Faggioli <raistlin@linux.it>
Signed-off-by: Michael Trimarchi <trimarchimichael@yahoo.it>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years ago[IA64] export account_system_vtime
Doug Chapman [Mon, 30 Jun 2008 22:06:48 +0000 (15:06 -0700)] 
[IA64] export account_system_vtime

The symbol account_system_vtime is used by the kvm module but
not exported.  This breaks building with CONFIG_VIRT_CPU_ACCOUNTING
and CONFIG_KVM=m.

Signed-off-by: Doug Chapman <doug.chapman@hp.com>
Acked-by: Hidetosho Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
16 years ago[IA64] Bugfix for system with 32 cpus
Tony Luck [Mon, 30 Jun 2008 22:03:14 +0000 (15:03 -0700)] 
[IA64] Bugfix for system with 32 cpus

On a system where there are no hot pluggable cpus "additional_cpus"
is still set to -1 at the point where we call per_cpu_scan_finalize().
If we didn't find an SRAT table and so pick the default "32" for the
number of cpus, when we get to:
high_cpu = min(high_cpu + reserve_cpus, NR_CPUS);
we will end up initializing for just 31 cpus ... and so we will
die horribly when bringing up cpu#32.

Problem introduced by: 2c6e6db41f01b6b4eb98809350827c9678996698
"Minimize per_cpu reservations."

Acked-by: Robin Holt <holt@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
16 years agoiwlwifi: fix 4965 uCode load
Tomas Winkler [Mon, 30 Jun 2008 09:23:26 +0000 (17:23 +0800)] 
iwlwifi: fix 4965 uCode load

This patch fixes uCode load in 4965 HW

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi: clean up HW RF-kill state machine and restarts
Emmanuel Grumbach [Mon, 30 Jun 2008 09:23:25 +0000 (17:23 +0800)] 
iwlwifi: clean up HW RF-kill state machine and restarts

This patch cleans up HW RF-kill state machine.

Signed-off-by: Mohamed Abbas <mohamed.abbas@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi: blocking mac_start until uCode is complete
Emmanuel Grumbach [Mon, 30 Jun 2008 09:23:24 +0000 (17:23 +0800)] 
iwlwifi: blocking mac_start until uCode is complete

This patch makes iwl4965_mac_start block until the uCode has been
completely loaded.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi: eliminate iwl4965_mac_get_tsf
Ron Rindjunsky [Mon, 30 Jun 2008 09:23:23 +0000 (17:23 +0800)] 
iwlwifi: eliminate iwl4965_mac_get_tsf

This patch removes iwl4965_mac_get_tsf, as this function does not
currently reports any actual value.

Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi: Remove unnecessary code
Abhijeet Kolekar [Mon, 30 Jun 2008 09:23:22 +0000 (17:23 +0800)] 
iwlwifi: Remove unnecessary code

Removed unnecessary goto.

Signed-off-by: Abhijeet Kolekar <abhijeet.kolekar@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi: control 11n capabilities through module param
Ron Rindjunsky [Mon, 30 Jun 2008 09:23:21 +0000 (17:23 +0800)] 
iwlwifi: control 11n capabilities through module param

This patch adds module param 11n_disable to allow configuration of 11n
capabilities. The default value of this param is 11n enabled (value 0).

Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi: unite common settings of HW params
Ron Rindjunsky [Mon, 30 Jun 2008 09:23:20 +0000 (17:23 +0800)] 
iwlwifi: unite common settings of HW params

This patch unites common settings of 4965 and 5000 hw params.

Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi: don't bring up interface if RF-kill avoids radio
Emmanuel Grumbach [Mon, 30 Jun 2008 09:23:19 +0000 (17:23 +0800)] 
iwlwifi: don't bring up interface if RF-kill avoids radio

This patch avoids the user from bringing up the interface if RF-kill
doesn't allow radio.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Mohamed Abbas <mohamed.abbas@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi : Patch adds rfkill subsystem for 3945
Abhijeet Kolekar [Mon, 30 Jun 2008 09:23:18 +0000 (17:23 +0800)] 
iwlwifi : Patch adds rfkill subsystem for 3945

The patch removes the sysfs interface from iwl3945 and uses
the rfkill subsystem instead.

Original patch by Adel, I fixed the patch to work it properly.

Signed-off-by: Adel Gadllah <adel.gadllah@gmail.com>
Signed-off-by: Abhijeet Kolekar <abhijeet.kolekar@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi: adjust TSF in IBSS
Assaf Krauss [Mon, 30 Jun 2008 09:23:17 +0000 (17:23 +0800)] 
iwlwifi: adjust TSF in IBSS

This patch makes the driver, in IBSS mode, comply with TSF requirements
in 2 ways:
1. It notifies mac80211 of its TSF timestamp.
2. It uses the given timestamp in the beacon template to update the ucode.

Signed-off-by: Assaf Krauss <assaf.krauss@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agomac80211: add beacon timestamp to beacon template in IBSS
Assaf Krauss [Mon, 30 Jun 2008 09:23:16 +0000 (17:23 +0800)] 
mac80211: add beacon timestamp to beacon template in IBSS

This patch adds a beacon timestamp to the beacon template used in IBSS
mode. This way the underlying driver can update its TSF accordingly.
According the spec station should adopt the highest TSF from an incoming
beacons in the cell.

Signed-off-by: Assaf Krauss <assaf.krauss@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi: keep the STATUS_EXIT_PENDING flag till the end of down flow
Mohamed Abbas [Mon, 30 Jun 2008 09:23:15 +0000 (17:23 +0800)] 
iwlwifi: keep the STATUS_EXIT_PENDING flag till the end of down flow

This patch avoids unsetting STATUS_EXIT_PENDING in the middle of the
down flow.

Signed-off-by: Mohamed Abbas <mohamed.abbas@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi: fix IBSS association flow
Tomas Winkler [Mon, 30 Jun 2008 09:23:14 +0000 (17:23 +0800)] 
iwlwifi: fix IBSS association flow

This patch fixes regression caused by
'iwlwifi: send ADD_STA before RXON with assoc bit' patch.
RXON associated wasn't IBSS flow.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Assaf Krauss <assaf.krauss@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi: remove obsolete lq_ready use
Ron Rindjunsky [Mon, 30 Jun 2008 09:23:13 +0000 (17:23 +0800)] 
iwlwifi: remove obsolete lq_ready use

This patch removes the use of lq_ready, once used to sync between link
quality commands to avoid race conditions, but no longer needed as
bss_info_changed is in use.

Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi: move rx aggregation functions to iwl-rx.c
Ron Rindjunsky [Mon, 30 Jun 2008 09:23:12 +0000 (17:23 +0800)] 
iwlwifi: move rx aggregation functions to iwl-rx.c

This patch moves Rx aggregation functions into iwl-rx.c

Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi: setup compressed BA handler
Emmanuel Grumbach [Mon, 30 Jun 2008 09:23:11 +0000 (17:23 +0800)] 
iwlwifi: setup compressed BA handler

This patch sets the compressed BA handler for 5000. This allows the rate
scaling algorithm to take in count frames that were sent in AMPDUs.

The compressed BA handler has been moved to iwl-rx.c since it is common to
4965 and 5000.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi: remove useless network and duplicate checking
Emmanuel Grumbach [Mon, 30 Jun 2008 09:23:10 +0000 (17:23 +0800)] 
iwlwifi: remove useless network and duplicate checking

The iwlwifi drivers go to great lengths to avoid passing packets to
mac80211 they think shouldn't go there, while mac80211 can (of course!)
handle them very well.

Especially in the case of duplicate packets this is interesting
because it's such a performance hog (especially for IBSS networks)
while mac80211 does that work on the side without much effort.

This patch removes all that and leaves only what is absolutely
necessary for the hardware.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi: move RX handlers to iwl-rx.c
Emmanuel Grumbach [Mon, 30 Jun 2008 09:23:09 +0000 (17:23 +0800)] 
iwlwifi: move RX handlers to iwl-rx.c

This patch moves RX handlers to iwl-rx.c

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi: don't send REPLY_REMOVE_ALL_STA upon exit
Emmanuel Grumbach [Mon, 30 Jun 2008 09:23:08 +0000 (17:23 +0800)] 
iwlwifi: don't send REPLY_REMOVE_ALL_STA upon exit

This patch avoids sending REPLY_REMOVE_ALL_STA in down flow, this avoids a
meaningless warning from being printed
On the way this patch also renames the the function to
iwl_clear_stations_table

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi: move RX stats to core, and move temperature to handler
Emmanuel Grumbach [Mon, 30 Jun 2008 09:23:07 +0000 (17:23 +0800)] 
iwlwifi: move RX stats to core, and move temperature to handler

This patch moves RX stats flow to core modules, and moves temperature
calibration to handler since it is not needed in 5000.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi: send ADD_STA before RXON with assoc bit
Emmanuel Grumbach [Mon, 30 Jun 2008 09:23:06 +0000 (17:23 +0800)] 
iwlwifi: send ADD_STA before RXON with assoc bit

This patch fixes a bug in association flow. As soon as RXON with assoc bit
is sent, uCode expects to have an entry in its station table that describe
the AP. Receiving a beacon from an HT AP before sending ADD_STA results a
uCode error. This patch sends first the ADD_STA (bcast and bssid) and only
then RXON with assoc bit set

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi: add REPLY_TX_POWER_DBM_CMD to get_cmd_string
Emmanuel Grumbach [Mon, 30 Jun 2008 09:23:05 +0000 (17:23 +0800)] 
iwlwifi: add REPLY_TX_POWER_DBM_CMD to get_cmd_string

This patch adds REPLY_TX_POWER_DBM_CMD to get_cmd_string.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi: use iwl_is_associated when possible
Ron Rindjunsky [Mon, 30 Jun 2008 09:23:04 +0000 (17:23 +0800)] 
iwlwifi: use iwl_is_associated when possible

This patch add uses of iwl_is_associated in places it is suitable in.

Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi: better station table maintenance
Emmanuel Grumbach [Mon, 30 Jun 2008 09:23:03 +0000 (17:23 +0800)] 
iwlwifi: better station table maintenance

This patch makes the station table maintenance safer. Two flags are
maintained:

1) if station is present in driver
2) if station is present in uCode

This will allow us in the future to deal with more stations than the
firmware allows.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi: Add eeprom version to the version file in sysfs
Tomas Winkler [Mon, 30 Jun 2008 09:23:02 +0000 (17:23 +0800)] 
iwlwifi: Add eeprom version to the version file in sysfs

This patch adds eeprom version display into device/version sysfs file
/sys/class/net/wlanX/devices/version

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi: configure uCode to use open loop tx power algorithm
Gregory Greenman [Mon, 30 Jun 2008 09:23:01 +0000 (17:23 +0800)] 
iwlwifi: configure uCode to use open loop tx power algorithm

This patch configures uCode to use open loop tx power algorithm
via TX_POWER_DBM (0x98) host command.

Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agob43/b43legacy: add RFKILL_STATE_HARD_BLOCKED support
Adel Gadllah [Sun, 29 Jun 2008 17:20:21 +0000 (19:20 +0200)] 
b43/b43legacy: add RFKILL_STATE_HARD_BLOCKED support

This patch sets the rfkill state to RFKILL_STATE_HARD_BLOCKED when the
radio is killed by the hardware switch.

Signed-off-by: Adel Gadllah <adel.gadllah@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agob43/b43legacy: use RFKILL_STATE_UNBLOCKED instead of RFKILL_STATE_ON
Adel Gadllah [Sat, 28 Jun 2008 12:20:40 +0000 (14:20 +0200)] 
b43/b43legacy: use RFKILL_STATE_UNBLOCKED instead of RFKILL_STATE_ON

This patch removes the usage RFKILL_STATE_ON and uses
RFKILL_STATE_UNBLOCKED instead.

Signed-off-by: Adel Gadllah <adel.gadllah@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agomac80211: fix warning: unused variable invoke_tx_handlers
Tomas Winkler [Sat, 28 Jun 2008 00:15:03 +0000 (03:15 +0300)] 
mac80211: fix warning: unused variable invoke_tx_handlers

This patch fixes warning: unused variable in invoke_tx_handlers
when compiling without MAC80211_DEBUG option

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agohostap: use radiotap headers by default
Pavel Roskin [Fri, 27 Jun 2008 20:20:16 +0000 (16:20 -0400)] 
hostap: use radiotap headers by default

Signed-off-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agohostap: add radiotap support in monitor mode
Pavel Roskin [Fri, 27 Jun 2008 20:20:10 +0000 (16:20 -0400)] 
hostap: add radiotap support in monitor mode

Provide MAC time, rate, channel, signal and noise.

Signed-off-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agohostap: don't skip any headers in hostap_80211_header_parse()
Pavel Roskin [Fri, 27 Jun 2008 20:20:04 +0000 (16:20 -0400)] 
hostap: don't skip any headers in hostap_80211_header_parse()

Don't try to skip any headers in hostap_80211_header_parse().  We never
use that function for interfaces affected by local->monitor_type.  Both
the master and the AP interface receive 802.11 frames without any
additional headers.

Signed-off-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwlwifi: fix rfkill deps and remove input device usage
Adel Gadllah [Fri, 27 Jun 2008 17:45:07 +0000 (19:45 +0200)] 
iwlwifi: fix rfkill deps and remove input device usage

This patch fixes the rfkill deps for iwl4965/5000
and removes the input device usage.

Signed-off-by: Adel Gadllah <adel.gadllah@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agomac80211: removing duplicated parsing of information elements
Ester Kummer [Fri, 27 Jun 2008 15:54:48 +0000 (18:54 +0300)] 
mac80211: removing duplicated parsing of information elements

This patch removes the duplicated parsing of information elements
in ieee80211_rx_bss_info and in ieee_rx_mgmt_beacon

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Ester Kummer <ester.kummer@intel.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agobuild algorithms into the mac80211 module
Adrian Bunk [Thu, 26 Jun 2008 10:38:13 +0000 (13:38 +0300)] 
build algorithms into the mac80211 module

The old infrastructure was:
- the default algorithm is built into mac80211
- other algorithms get into their own modules

The implementation of this complicated scheme was horrible
(just look at net/mac80211/Makefile), and anyone adding a new
algorithm would most likely not get it right at his first attempt.

This patch therefore builds all enabled algorithms into the mac80211
module.

The user interface for the rate control algorithms changes as follows:
- first the user can choose which algorithms to enable (currently only
  MAC80211_RC_PID is available)
- if more than one algorithm is enabled (currently not possible since
  only one algorithm is present) the user then chooses the default one

Note:
- MAC80211_RC_PID is always enables for CONFIG_EMBEDDED=n

Technical changes:
- all selected algorithms get into the mac80211 module
- net/mac80211/Makefile can now become much less complicated
- support for rc80211_pid_algo.c being modular is no longer required
- this includes unexporting mesh_plink_broken

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agomac80211: add last beacon time in scan list
Emmanuel Grumbach [Tue, 24 Jun 2008 10:38:00 +0000 (13:38 +0300)] 
mac80211: add last beacon time in scan list

This patch adds the interval between the scan results and the last time a
beacon was received in the result of the scan.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agomac80211: add spectrum capabilities
Tomas Winkler [Wed, 18 Jun 2008 14:53:44 +0000 (17:53 +0300)] 
mac80211: add spectrum capabilities

This patch add spectrum capability and required information
elements to association request providing AP has requested it and
it is supported by the driver

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Assaf Krauss <assaf.krauss@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agomac80211: add MAC80211_VERBOSE_SPECT_MGMT_DEBUG Kconfig option
Yi Zhu [Wed, 18 Jun 2008 14:53:43 +0000 (17:53 +0300)] 
mac80211: add MAC80211_VERBOSE_SPECT_MGMT_DEBUG Kconfig option

The patch introduces MAC80211_VERBOSE_SPECT_MGMT_DEBUG Kconfig option to
suppress Spectrum Management 802.11h related debug logs.

Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoiwl-rfkill.c: correct 'recieved' typo
John W. Linville [Fri, 27 Jun 2008 17:04:25 +0000 (13:04 -0400)] 
iwl-rfkill.c: correct 'recieved' typo

Correct typo introduced by "wireless: remove RFKILL_STATE_HARD_BLOCKED
warnings".

Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agoV4L/DVB (8145a): USB Video Class driver
Laurent Pinchart [Mon, 30 Jun 2008 18:04:50 +0000 (15:04 -0300)] 
V4L/DVB (8145a): USB Video Class driver

This driver supports video input devices compliant with the USB Video Class
specification. This means lots of currently manufactured webcams, and probably
most of the future ones.

Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
16 years agoMerge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/linville/wireles...
David S. Miller [Mon, 30 Jun 2008 20:18:53 +0000 (13:18 -0700)] 
Merge branch 'master' of /linux/kernel/git/linville/wireless-2.6

16 years agomac80211: don't accept WEP keys other than WEP40 and WEP104
Emmanuel Grumbach [Fri, 27 Jun 2008 23:50:13 +0000 (02:50 +0300)] 
mac80211: don't accept WEP keys other than WEP40 and WEP104

This patch makes mac80211 refuse a WEP key whose length is not WEP40 nor
WEP104.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agohostap: fix sparse warnings
Pavel Roskin [Fri, 27 Jun 2008 20:19:58 +0000 (16:19 -0400)] 
hostap: fix sparse warnings

Rewrite AID calculation in handle_pspoll() to avoid truncating bits.
Make hostap_80211_header_parse() static, don't export it.  Avoid
shadowing variables.

Signed-off-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agohostap: don't report useless WDS frames by default
Pavel Roskin [Fri, 27 Jun 2008 20:19:52 +0000 (16:19 -0400)] 
hostap: don't report useless WDS frames by default

DEBUG_EXTRA is reported to the kernel log by default, but DEBUG_EXTRA2
is not.  Unrelated WDS frames pollute the log unnecessarily.

Signed-off-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
16 years agotextsearch: fix Boyer-Moore text search bug
Joonwoo Park [Mon, 30 Jun 2008 19:42:23 +0000 (12:42 -0700)] 
textsearch: fix Boyer-Moore text search bug

The current logic has a bug which cannot find matching pattern, if the
pattern is matched from the first character of target string.
for example:
pattern=abc, string=abcdefg
pattern=a,   string=abcdefg
Searching algorithm should return 0 for those things.

Signed-off-by: Joonwoo Park <joonwpark81@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
16 years agonetfilter: nf_conntrack_tcp: fixing to check the lower bound of valid ACK
Jozsef Kadlecsik [Mon, 30 Jun 2008 19:41:30 +0000 (12:41 -0700)] 
netfilter: nf_conntrack_tcp: fixing to check the lower bound of valid ACK

Lost connections was reported by Thomas Bätzler (running 2.6.25 kernel) on
the netfilter mailing list (see the thread "Weird nat/conntrack Problem
with PASV FTP upload"). He provided tcpdump recordings which helped to
find a long lingering bug in conntrack.

In TCP connection tracking, checking the lower bound of valid ACK could
lead to mark valid packets as INVALID because:

 - We have got a "higher or equal" inequality, but the test checked
   the "higher" condition only; fixed.
 - If the packet contains a SACK option, it could occur that the ACK
   value was before the left edge of our (S)ACK "window": if a previous
   packet from the other party intersected the right edge of the window
   of the receiver, we could move forward the window parameters beyond
   accepting a valid ack. Therefore in this patch we check the rightmost
   SACK edge instead of the ACK value in the lower bound of valid (S)ACK
   test.

Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
16 years agoide: fix /proc/ide/ide?/mate reporting
Bartlomiej Zolnierkiewicz [Mon, 30 Jun 2008 18:14:45 +0000 (20:14 +0200)] 
ide: fix /proc/ide/ide?/mate reporting

Now that we support warm-plug mate port will be registered
even if there are no devices attached to it.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years agoRevert "BAST: Remove old IDE driver"
Bartlomiej Zolnierkiewicz [Mon, 30 Jun 2008 18:13:31 +0000 (20:13 +0200)] 
Revert "BAST: Remove old IDE driver"

This reverts commit ac1623625c5818bbdf5c68973098ba386ba7a004.

It was premature to remove it now, we will do it post-2.6.26.

Thanks to Russell King for noticing the issue.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
16 years ago[ARM] 5131/1: Annotate platform_secondary_init with trace_hardirqs_off
Catalin Marinas [Fri, 27 Jun 2008 14:15:12 +0000 (15:15 +0100)] 
[ARM] 5131/1: Annotate platform_secondary_init with trace_hardirqs_off

This patch annotates the platform_secondary_init function in
arch/arm/mach-realview/platsmp.c with trace_hardirqs_off to avoid a
warning when LOCKDEP and TRACE_IRQFLAGS are enabled.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
16 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Linus Torvalds [Mon, 30 Jun 2008 15:58:09 +0000 (08:58 -0700)] 
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: fix locking in force-feedback core
  Input: add KEY_MEDIA_REPEAT definition

16 years agoMerge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Mon, 30 Jun 2008 15:57:43 +0000 (08:57 -0700)] 
Merge branch 'core-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  debugobjects: fix lockdep warning

16 years agoMerge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Mon, 30 Jun 2008 15:57:19 +0000 (08:57 -0700)] 
Merge branch 'sched-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  sched: fix cpu hotplug