enable iwl driver to support 5000 ucode having version 2 of API
Signed-off-by: Jay Sternberg <jay.e.sternberg@linux.intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

Its possible for cfg80211 to have scheduled the work and for
the global workqueue to not have kicked in prior to a cfg80211
driver's regulatory hint or wiphy_apply_custom_regulatory().

Although this is very unlikely its possible and should fix
this race. When this race would happen you are expected to have
hit a null pointer dereference panic.

Cc: stable@kernel.org
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Tested-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

"airo: airo_get_encode{,ext} potential buffer overflow" was actually a
no-op, due to an unrecognized type overflow in an assignment.  Oddly,
gcc only seems to tell me about it when using -Wextra...grrr...
Signed-off-by: John W. Linville <linville@tuxdriver.com>

When the EEPROM contains weird values for the power levels we have to
fix the interpolation process.
Signed-off-by: Fabio Rossi <rossi.f@inwind.it>
Acked-by: Nick Kossifidis <mickflemm@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

Calling cancel_delayed_work() from inside
spin_lock_irqsave, introduces a potential deadlock.

As explained by Johannes Berg <johannes@sipsolutions.net>

A - lock
T - timer

phase                   CPU 1           CPU 2
---------------------------------------------

some place that calls
cancel_timer_sync()
(which is the | code)
                                        lock-irq(A)
|                                       "lock-irq"(T)
|                                       "unlock"(T)
|                                       wait(T)
                                        unlock(A)

timer softirq
                        "lock"(T)
                        run(T)
                        "unlock"(T)

irq handler
          lock(A)
          unlock(A)

Now all that again, interleaved, leading to deadlock:

                                        lock-irq(A)
                        "lock"(T)
                         run(T)
IRQ during or maybe
before run(T) -->        lock(A)
                                        "lock-irq"(T)
                                        wait(T)

We fix this by moving the call to cancel_delayed_work() into workqueue.
There are cases where the work may not actually be queued or running
at the time we are trying to cancel it, but cancel_delayed_work() is
able to deal with this.

Also cleanup iwl_set_mode related to this call. This function
(iwl_set_mode) is only called when bringing interface up and there will
thus not be any scanning done. No need to try to cancel scanning.

Fixes http://bugzilla.kernel.org/show_bug.cgi?id=13224, which was also
reported at http://marc.info/?l=linux-wireless&m=124081921903223&w=2 .
Tested-by: Miles Lane <miles.lane@gmail.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Acked-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

Commit e8f055f0 ("ath5k: Update reset code") subtly changed the
code that computes floating point values for the PHY3_TIMING register
such that the exponent is off by a decimal point, which can cause
problems with OFDM channel operation.

get_bitmask_order() actually returns the highest bit set plus one,
whereas the previous code wanted the highest bit set.  Instead, use
ilog2 which is what this code is really calculating.  Also check
coef_scaled to handle the (invalid) case where we need log2(0).
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

Another design flaw in wireless extensions (is anybody
surprised?) in the way it handles the iw_encode_ext
structure: The structure is part of the 'extra' memory
but contains the key length explicitly, instead of it
just being the length of the extra buffer - size of
the struct and using the explicit key length only for
the get operation (which only writes it).

Therefore, we have this layout:

extra: +-------------------------+
       | struct iw_encode_ext  { |
       |     ...                 |
       |     u16 key_len;        |
       |     u8 key[0];          |
       | };                      |
       +-------------------------+
       | key material            |
       +-------------------------+

Now, all drivers I checked use ext->key_len without
checking that both key_len and the struct fit into the
extra buffer that has been copied from userspace. This
leads to a buffer overrun while reading that buffer,
depending on the driver it may be possible to specify
arbitrary key_len or it may need to be a proper length
for the key algorithm specified.

Thankfully, this is only exploitable by root, but root
can actually cause a segfault or use kernel memory as
a key (which you can even get back with siocgiwencode
or siocgiwencodeext from the key buffer).

Fix this by verifying that key_len fits into the buffer
along with struct iw_encode_ext.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

AR5K_PHY_PLL_40MHZ_5413 should not be ORed with AR5K_PHY_MODE_RAD_RF5112
for 5 GHz channels.

The incorrect PLL value breaks scanning in the countries where 5 GHz
channels are allowed.
Signed-off-by: Pavel Roskin <proski@gnu.org>
Acked-by: Nick Kossifidis <mickflemm@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

Commit e81963b1 ("ipv4: Make INET_LRO a bool instead of tristate.")
changed this config from tristate to bool.  Add default so that it is
consistent with the help text.
Signed-off-by: Frans Pop <elendil@planet.nl>
Signed-off-by: David S. Miller <davem@davemloft.net>

When called with a consumed value that is less than skb_headlen(skb)
bytes into a page frag, skb_seq_read() incorrectly returns an
offset/length relative to skb->data. Ensure that data which should come
from a page frag does.
Signed-off-by: Thomas Chenault <thomas_chenault@dell.com>
Tested-by: Shyam Iyer <shyam_iyer@dell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

gen_estimator can overflow bps (bytes per second) with Gb links, while
it was designed with a u32 API, with a theorical limit of 34360Mbit
(2^32 bytes)

Using 64 bit intermediate avbps/brate counters can allow us to reach
this theorical limit.
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Ajit Khaparde <ajitk@serverengines.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

It is illegal to dereference a skb after a successful ndo_start_xmit()
call. We must store skb length in a local variable instead.

Bug was introduced in 2.6.27 by commit 0abf77e5
(net_sched: Add accessor function for packet length for qdiscs)
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Commit 518a09ef (tcp: Fix recvmsg MSG_PEEK influence of
blocking behavior) lets the loop run longer than the race check
did previously expect, so we need to be more careful with this
check and consider the work we have been doing.

I tried my best to deal with urg hole madness too which happens
here:
	if (!sock_flag(sk, SOCK_URGINLINE)) {
		++*seq;
		...
by using additional offset by one but I certainly have very
little interest in testing that part.
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Tested-by: Frans Pop <elendil@planet.nl>
Tested-by: Ian Zimmermann <itz@buug.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Wang Tinggong <wangtinggong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

FIFO1_DMA_ERR is set twice, the second should be FIFO2_DMA_ERR.
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Acked-by: Ram Vepa <ram.vepa@neterion.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

After 2.6.29, PPC no more admits passing NULL to the dev parameter of
the DMA API. The result is a BUG followed by solid lock-up when the 
mv643xx_eth driver brings an interface up. The following patch makes 
the driver work on my Pegasos again; it is mostly a search and replace 
of NULL by mp->dev->dev.parent in dma allocation/freeing/mapping/unmapping
functions.
Signed-off-by: Gabriel Paubert <paubert@iram.es>
Acked-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

One of the purposes of bonding is to allow for redundant links, and failover
correctly if the cable is pulled. If all the members of a bonded device have
no carrier present, the bonded device itself needs to report no carrier present
to user space so management tools (like routing daemons) can respond.

Bonding in 802.3ad mode does not work correctly for this because it incorrectly
chooses a link that is down as a possible aggregator.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

If bridge is configured with no STP and forwarding delay of 0 (which
is typical for virtualization) then when link starts it will flood all
packets for the first 20 seconds.

This bug was introduced by a combination of earlier changes:
  * forwarding database uses hold time of zero to indicate
    user wants to always flood packets
  * optimzation of the case of forwarding delay of 0 avoids the initial
    timer tick

The fix is to just skip all the topology change detection code if
kernel STP is not being used.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Currently the bridge catches all STP packets; even if STP is turned
off.  This prevents other systems (which do have STP turned on)
from being able to detect loops in the network.

With this patch, if STP is off, then any packet sent to the STP
multicast group address is forwarded to all ports.

Based on earlier patch by Joakim Tjernlund with changes
to go through forwarding (not local chain), and optimization
that only last octet needs to be checked.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Mixing of normal and irq spinlocks results in the following lockdep messages
on bootup on IP32:

[...]
Sending DHCP requests .
======================================================
[ INFO: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected ]
2.6.30-rc5-00164-g41baeef #30
------------------------------------------------------
swapper/1 [HC0[0]:SC0[1]:HE0:SE0] is trying to acquire:
 (&priv->meth_lock){+.+...}, at: [<ffffffff8026388c>] meth_tx+0x48/0x43c

and this task is already holding:
 (_xmit_ETHER#2){+.-...}, at: [<ffffffff802d3a00>] __qdisc_run+0x118/0x30c
which would create a new lock dependency:
 (_xmit_ETHER#2){+.-...} -> (&priv->meth_lock){+.+...}

but this new dependency connects a SOFTIRQ-irq-safe lock:
 (_xmit_ETHER#2){+.-...}
... which became SOFTIRQ-irq-safe at:
  [<ffffffff80061458>] __lock_acquire+0x784/0x1a14
  [<ffffffff800627e0>] lock_acquire+0xf8/0x150
  [<ffffffff800128d0>] _spin_lock+0x30/0x44
  [<ffffffff802d2b88>] dev_watchdog+0x70/0x398
  [<ffffffff800433b8>] run_timer_softirq+0x1a8/0x248
  [<ffffffff8003da5c>] __do_softirq+0xec/0x208
  [<ffffffff8003dbd8>] do_softirq+0x60/0xe4
  [<ffffffff8003dda0>] irq_exit+0x54/0x9c
  [<ffffffff80004420>] ret_from_irq+0x0/0x4
  [<ffffffff80004720>] r4k_wait+0x20/0x40
  [<ffffffff80015418>] cpu_idle+0x30/0x60
  [<ffffffff804cd934>] start_kernel+0x3ec/0x404

to a SOFTIRQ-irq-unsafe lock:
 (&priv->meth_lock){+.+...}
... which became SOFTIRQ-irq-unsafe at:
...  [<ffffffff800614f8>] __lock_acquire+0x824/0x1a14
  [<ffffffff800627e0>] lock_acquire+0xf8/0x150
  [<ffffffff800128d0>] _spin_lock+0x30/0x44
  [<ffffffff80263f20>] meth_reset+0x118/0x2d8
  [<ffffffff8026424c>] meth_open+0x28/0x140
  [<ffffffff802c1ae8>] dev_open+0xe0/0x18c
  [<ffffffff802c1268>] dev_change_flags+0xd8/0x1d4
  [<ffffffff804e7770>] ip_auto_config+0x1d4/0xf28
  [<ffffffff80012e68>] do_one_initcall+0x58/0x170
  [<ffffffff804cd190>] kernel_init+0x98/0x104
  [<ffffffff8001520c>] kernel_thread_helper+0x10/0x18

other info that might help us debug this:

2 locks held by swapper/1:
 #0:  (rcu_read_lock){.+.+..}, at: [<ffffffff802c0954>] dev_queue_xmit+0x1e0/0x4b0
 #1:  (_xmit_ETHER#2){+.-...}, at: [<ffffffff802d3a00>] __qdisc_run+0x118/0x30c

the SOFTIRQ-irq-safe lock's dependencies:
-> (_xmit_ETHER#2){+.-...} ops: 0 {
   HARDIRQ-ON-W at:
                        [<ffffffff800614d0>] __lock_acquire+0x7fc/0x1a14
                        [<ffffffff800627e0>] lock_acquire+0xf8/0x150
                        [<ffffffff800128d0>] _spin_lock+0x30/0x44
                        [<ffffffff802d2b88>] dev_watchdog+0x70/0x398
                        [<ffffffff800433b8>] run_timer_softirq+0x1a8/0x248
                        [<ffffffff8003da5c>] __do_softirq+0xec/0x208
                        [<ffffffff8003dbd8>] do_softirq+0x60/0xe4
                        [<ffffffff8003dda0>] irq_exit+0x54/0x9c
                        [<ffffffff80004420>] ret_from_irq+0x0/0x4
                        [<ffffffff80004720>] r4k_wait+0x20/0x40
                        [<ffffffff80015418>] cpu_idle+0x30/0x60
                        [<ffffffff804cd934>] start_kernel+0x3ec/0x404
   IN-SOFTIRQ-W at:
                        [<ffffffff80061458>] __lock_acquire+0x784/0x1a14
                        [<ffffffff800627e0>] lock_acquire+0xf8/0x150
                        [<ffffffff800128d0>] _spin_lock+0x30/0x44
                        [<ffffffff802d2b88>] dev_watchdog+0x70/0x398
                        [<ffffffff800433b8>] run_timer_softirq+0x1a8/0x248
                        [<ffffffff8003da5c>] __do_softirq+0xec/0x208
                        [<ffffffff8003dbd8>] do_softirq+0x60/0xe4
                        [<ffffffff8003dda0>] irq_exit+0x54/0x9c
                        [<ffffffff80004420>] ret_from_irq+0x0/0x4
                        [<ffffffff80004720>] r4k_wait+0x20/0x40
                        [<ffffffff80015418>] cpu_idle+0x30/0x60
                        [<ffffffff804cd934>] start_kernel+0x3ec/0x404
   INITIAL USE at:
                       [<ffffffff80061570>] __lock_acquire+0x89c/0x1a14
                       [<ffffffff800627e0>] lock_acquire+0xf8/0x150
                       [<ffffffff800128d0>] _spin_lock+0x30/0x44
                       [<ffffffff802d2b88>] dev_watchdog+0x70/0x398
                       [<ffffffff800433b8>] run_timer_softirq+0x1a8/0x248
                       [<ffffffff8003da5c>] __do_softirq+0xec/0x208
                       [<ffffffff8003dbd8>] do_softirq+0x60/0xe4
                       [<ffffffff8003dda0>] irq_exit+0x54/0x9c
                       [<ffffffff80004420>] ret_from_irq+0x0/0x4
                       [<ffffffff80004720>] r4k_wait+0x20/0x40
                       [<ffffffff80015418>] cpu_idle+0x30/0x60
                       [<ffffffff804cd934>] start_kernel+0x3ec/0x404
 }
 ... key      at: [<ffffffff80cf93f0>] netdev_xmit_lock_key+0x8/0x1c8

the SOFTIRQ-irq-unsafe lock's dependencies:
-> (&priv->meth_lock){+.+...} ops: 0 {
   HARDIRQ-ON-W at:
                        [<ffffffff800614d0>] __lock_acquire+0x7fc/0x1a14
                        [<ffffffff800627e0>] lock_acquire+0xf8/0x150
                        [<ffffffff800128d0>] _spin_lock+0x30/0x44
                        [<ffffffff80263f20>] meth_reset+0x118/0x2d8
                        [<ffffffff8026424c>] meth_open+0x28/0x140
                        [<ffffffff802c1ae8>] dev_open+0xe0/0x18c
                        [<ffffffff802c1268>] dev_change_flags+0xd8/0x1d4
                        [<ffffffff804e7770>] ip_auto_config+0x1d4/0xf28
                        [<ffffffff80012e68>] do_one_initcall+0x58/0x170
                        [<ffffffff804cd190>] kernel_init+0x98/0x104
                        [<ffffffff8001520c>] kernel_thread_helper+0x10/0x18
   SOFTIRQ-ON-W at:
                        [<ffffffff800614f8>] __lock_acquire+0x824/0x1a14
                        [<ffffffff800627e0>] lock_acquire+0xf8/0x150
                        [<ffffffff800128d0>] _spin_lock+0x30/0x44
                        [<ffffffff80263f20>] meth_reset+0x118/0x2d8
                        [<ffffffff8026424c>] meth_open+0x28/0x140
                        [<ffffffff802c1ae8>] dev_open+0xe0/0x18c
                        [<ffffffff802c1268>] dev_change_flags+0xd8/0x1d4
                        [<ffffffff804e7770>] ip_auto_config+0x1d4/0xf28
                        [<ffffffff80012e68>] do_one_initcall+0x58/0x170
                        [<ffffffff804cd190>] kernel_init+0x98/0x104
                        [<ffffffff8001520c>] kernel_thread_helper+0x10/0x18
   INITIAL USE at:
                       [<ffffffff80061570>] __lock_acquire+0x89c/0x1a14
                       [<ffffffff800627e0>] lock_acquire+0xf8/0x150
                       [<ffffffff800128d0>] _spin_lock+0x30/0x44
                       [<ffffffff80263f20>] meth_reset+0x118/0x2d8
                       [<ffffffff8026424c>] meth_open+0x28/0x140
                       [<ffffffff802c1ae8>] dev_open+0xe0/0x18c
                       [<ffffffff802c1268>] dev_change_flags+0xd8/0x1d4
                       [<ffffffff804e7770>] ip_auto_config+0x1d4/0xf28
                       [<ffffffff80012e68>] do_one_initcall+0x58/0x170
                       [<ffffffff804cd190>] kernel_init+0x98/0x104
                       [<ffffffff8001520c>] kernel_thread_helper+0x10/0x18
 }
 ... key      at: [<ffffffff80cf6ce8>] __key.32424+0x0/0x8

stack backtrace:
Call Trace:
[<ffffffff8000ed0c>] dump_stack+0x8/0x34
[<ffffffff80060b74>] check_usage+0x470/0x4a0
[<ffffffff80060c34>] check_irq_usage+0x90/0x130
[<ffffffff80061f78>] __lock_acquire+0x12a4/0x1a14
[<ffffffff800627e0>] lock_acquire+0xf8/0x150
[<ffffffff80012a0c>] _spin_lock_irqsave+0x60/0x84
[<ffffffff8026388c>] meth_tx+0x48/0x43c
[<ffffffff802d3a38>] __qdisc_run+0x150/0x30c
[<ffffffff802c0aa8>] dev_queue_xmit+0x334/0x4b0
[<ffffffff804e7e6c>] ip_auto_config+0x8d0/0xf28
[<ffffffff80012e68>] do_one_initcall+0x58/0x170
[<ffffffff804cd190>] kernel_init+0x98/0x104
[<ffffffff8001520c>] kernel_thread_helper+0x10/0x18

..... timed out!
IP-Config: Retrying forever (NFS root)...
Sending DHCP requests ., OK
[...]

Fixed by converting all locks to irq locks.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Tested-by: Andrew Randrianasulu <randrik_a@yahoo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Napi structures are being created each time we open a port, but when
the port is closed the napi structure is only disabled but not removed.
This bug caused hang while removing the driver.
Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>

If a DHCP server is delayed, it's possible for the client to receive the 
DHCPOFFER after it has already sent out a new DHCPDISCOVER message from 
a second interface.  The client then sends out a DHCPREQUEST from the 
second interface, but the server doesn't recognize the device and 
rejects the request.

This patch simply tracks the current device being configured and throws 
away the OFFER if it is not intended for the current device.  A more 
sophisticated approach would be to put the OFFER information into the 
struct ic_device rather than storing it globally.
Signed-off-by: Chris Friesen <cfriesen@nortel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

It looks like the dev in netpoll_poll can be NULL - at lease it's
checked at the function beginning. Thus the dev->netde_ops dereference
looks dangerous.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Ian Campbell noticed that since "Eliminate thousands of warnings with
gcc 3.2 build" (commit 57adc4d2) all
WARN_ON()'s currently appear to come from warn_slowpath_null(), eg:

  WARNING: at kernel/softirq.c:143 warn_slowpath_null+0x1c/0x20()

because now that warn_slowpath_null() is in the call path, the
__builtin_return_address(0) returns that, rather than the place that
caused the warning.

Fix this by splitting up the warn_slowpath_null/fmt cases differently,
using a common helper function, and getting the return address in the
right place.  This also happens to avoid the unnecessary stack usage for
the non-stdargs case, and just generally cleans things up.

Make the function name printout use %pS while at it.

Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6:
  piix: The Sony TZ90 needs the cable type hardcoding
  icside: register second channel of version 6 PCB
  ide-tape: remove back-to-back REQUEST_SENSE detection

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
  ACPI: Idle C-states disabled by max_cstate should not disable the TSC
  ACPI: idle: fix init-time TSC check regression
  ACPI processor: reset the throttling state once it's invalid
  ACPI processor: introduce module parameter processor.ignore_tpc
  ACPI, i915: build fix
  ACPI: suspend: restore BM_RLD on resume
  ACPI: resume: re-enable SCI-enable workaround
  thermal: fix off-by-1 error in trip point trigger condition
  eeepc-laptop: unregister_rfkill_notifier on failure
  asus-laptop: fix input keycode
  eeepc-laptop: support for super hybrid engine (SHE)
  eeepc-laptop: Work around rfkill firmware bug
  eeepc-laptop: report brightness control events via the input layer
  eeepc-laptop: fix wlan rfkill state change during init
  ACPI: suspend: don't let device _PS3 failure prevent suspend
  ACPI: power: update error message
  ACPI: video: DMI workaround another broken Acer BIOS enabling display brightness
  ACPICA: use acpi.* modparam namespace
  ACPI video: dmi check for broken _BQC on Acer Aspire 5720

The Sony TZ90 needs the cable type hardcoding. See bug #12734
Signed-off-by: Alan Cox <alan@linux.intel.com>
Reported-by: Jonathan E. Snow <jesnow@uh.edu>
[bart: port it from ata_piix to piix and give reporter the proper credit]
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

The second IDE channel of version 6 PCB is not being registered anymore since
the commit 48c3c107 (ide: add struct ide_host
(take 3)).
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Impact: fix an oops which always triggers

ide_tape_issue_pc() assumed drive->pc isn't NULL on invocation when
checking for back-to-back request sense issues but drive->pc can be
NULL and even when it's not NULL, it's not safe to dereference it once
the previous command is complete because pc could have been freed or
was on stack.  Kill back-to-back REQUEST_SENSE detection.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Merge branches 'release', 'bugzilla-13032', 'bugzilla-13041+', 'bugzilla-13121', 'bugzilla-13165', 'bugzilla-13243', 'bugzilla-13259', 'resume-sci-en-regression', 'thermal-regression', 'tsc-regression' and 'asus-2.6.30' into release

Processor idle power states C2 and C3 stop the TSC on many machines.
Linux recognizes this situation and marks the TSC as unstable:

Marking TSC unstable due to TSC halts in idle

But if those same machines are booted with "processor.max_cstate=1",
then there is no need to validate C2 and C3, and no need to
disable the TSC, which can be reliably used as a clocksource.
Signed-off-by: Len Brown <len.brown@intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>

A previous 2.6.30 patch, a71e4917,
(ACPI: idle: mark_tsc_unstable() at init-time, not run-time)
erroneously disabled the TSC on systems that did not actually
have valid deep C-states.

Move the check after the deep-C-states are validated,
via new helper, tsc_check_state(), hich replaces tsc_halts_in_c().
Signed-off-by: Len Brown <len.brown@intel.com>
Acked-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Frans Pop <elendil@planet.nl>

If the BIOS hands us an invalid throttling state,
write a valid state.

http://bugzilla.kernel.org/show_bug.cgi?id=13259Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: James Ettle <theholyettlz@googlemail.com>
Signed-off-by: Len Brown <len.brown@intel.com>

Introduce module parameter processor.ignore_tpc.

Some laptops are shipped with buggy _TPC,
this module parameter is used to to disable the buggy support.

http://bugzilla.kernel.org/show_bug.cgi?id=13259Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: James Ettle <theholyettlz@googlemail.com>
Signed-off-by: Len Brown <len.brown@intel.com>

drivers/built-in.o: In function `intel_opregion_init':
(.text+0x9d540): undefined reference to `acpi_video_register'

http://bugzilla.kernel.org/show_bug.cgi?id=13165Signed-off-by: Len Brown <len.brown@intel.com>