Spurious NCQ completion detection implemented in ahci was incorrect.
On AHCI receving and processing FISes and raising interrupts are not
interlocked and spurious interrupts are expected.

For example, if an interrupt occurs while interrupt handler is running
and the running interrupt handler handles the event the new IRQ
indicated, after IRQ handler finishes, it will be executed again
because IRQ pending bit is set by the new interrupt but there won't be
anything to process.

Please read the following message for more information.

  http://article.gmane.org/gmane.linux.ide/26012

This patch...

* Removes all spurious IRQ whining from ahci.  Spurious NCQ completion
  detection was completely wrong.  Spurious D2H Register FIS taught us
  that some early drives send spurious D2H Register FIS with I bit set
  while NCQ commands are in progress but none of recent drives does
  that and even the ones which show such behavior can do NCQ fine.

* Kills all NCQ blacklist entries which were added because of spurious
  NCQ completions.  I tracked down each commit and verified all
  removed ones are actually added because of spurious completions.

  WD740ADFD-00NLR1 wasn't deleted but moved upward because the drive
  not only had spurious NCQ completions but also is slow on sequential
  data transfers if NCQ is enabled.

  Maxtor 7V300F0 was added by 0e3dbc01
  from Alan Cox.  I can only find evidences that the drive only had
  troubles with spuruious completions by searching the mailing list.
  This entry needs to be verified and removed if it doesn't have other
  NCQ related problems.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

ICH6 R/Ms share PCI ID between piix and ahci modes and we've been
allowing ahci to attach regardless of how BIOS configured it.
However, enabling AHCI mode when the controller is in combined mode
can result in unexpected behavior.  Don't attach if the controller is
in combined mode.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Bill Nottingham <notting@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

Add Toshiba Tecra M4 to broken suspend list.  This is from OSDL
bugzilla bug 7780.
Signed-off-by: Peter Schwenke <peter@bluetoad.com.au>
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

There isn't much point in reporting -EOPNOTSUPP as failure.  Also the
message was missing newline.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

* git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86:
  ACPI: move timer broadcast before busmaster disable
  clockevents: warn once when program_event() is called with negative expiry
  hrtimers: avoid overflow for large relative timeouts

* git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched:
  sched: enable early use of sched_clock()
  lockdep: make cli/sti annotation warnings clearer

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen/avr32-2.6:
  [AVR32] Fix wrong pt_regs in critical exception handler
  [AVR32] Fix copy_to_user_page() breakage
  [AVR32] Follow the rules when dealing with the OCD system
  [AVR32] Clean up OCD register usage
  [AVR32] Implement irqflags trace and lockdep support
  [AVR32] Implement stacktrace support
  [AVR32] Kconfig: Use def_bool instead of bool + default
  [AVR32] Fix invalid status register bit definitions in asm/ptrace.h
  [AVR32] Add TIF_RESTORE_SIGMASK to the work masks

* 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6:
  [AF_RXRPC]: Add a missing goto
  [VLAN]: Lost rtnl_unlock() in vlan_ioctl()
  [SCTP]: Fix the bind_addr info during migration.
  [SCTP]: Add bind hash locking to the migrate code
  [IPV4]: Remove prototype of ip_rt_advice
  [IPv4]: Reply net unreachable ICMP message
  [IPv6] SNMP: Increment OutNoRoutes when connecting to unreachable network
  [BRIDGE]: Section fix.
  [NIU]: Fix link LED handling.

* 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6:
  [SPARC64]: Fix memory controller register access when non-SMP.

* 'for-linus' of git://git.o-hand.com/linux-rpurdie-leds:
  leds: Fix led trigger locking bugs

The timer broadcast code might access HPET, which should not be
accessed after the busmaster disable.

In acpi_idle_enter_simple() this change also prevents, that we modify
the busmaster state without going actually idle. This might leave the
ACPI bm state in a stale state, when we leave the function early in
the need_resched() check.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>

The hrtimer problem with large relative timeouts resulting in a
negative expiry time went unnoticed as there is no check in the
clockevents_program_event() code. Put a check there with a WARN_ONCE
to avoid such problems in the future.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

Relative hrtimers with a large timeout value might end up as negative
timer values, when the current time is added in hrtimer_start().

This in turn is causing the clockevents_set_next() function to set an
huge timeout and sleep for quite a long time when we have a clock
source which is capable of long sleeps like HPET. With PIT this almost
goes unnoticed as the maximum delta is ~27ms. The non-hrt/nohz code
sorts this out in the next timer interrupt, so we never noticed that
problem which has been there since the first day of hrtimers.

This bug became more apparent in 2.6.24 which activates HPET on more
hardware.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

some platforms have sched_clock() implementations that cannot be called
very early during wakeup. If it's called it might hang or crash in hard
to debug ways. So only call update_rq_clock() [which calls sched_clock()]
if sched_init() has already been called. (rq->idle is NULL before the
scheduler is initialized.)
Signed-off-by: Ingo Molnar <mingo@elte.hu>

make cli/sti annotation warnings easier to interpret.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>

It's not like it really matters at this point since the system is
dying anyway, but handle_critical pushes too few registers on the
stack so the register dump, which makes the register dump look a bit
strange. This patch fixes it.
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

The current implementation of copy_to_user_page() gives "vaddr" to the
cache instruction when trying to sync the icache with the dcache. If
vaddr does not exist in the TLB, the CPU will silently abort the
operation, which may result in the caches staying out of sync.

To fix this, pass the "dst" parameter to flush_icache_range() instead
-- we know this is valid because we just wrote to it.
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

The current debug trap handling code does a number of things that are
illegal according to the AVR32 Architecture manual. Most importantly,
it may try to schedule from Debug Mode, thus clearing the D bit, which
can lead to "undefined behaviour".

It seems like this works in most cases, but several people have
observed somewhat unstable behaviour when debugging programs,
including soft lockups. So there's definitely something which is not
right with the existing code.

The new code will never schedule from Debug mode, it will always exit
Debug mode with a "retd" instruction, and if something not running in
Debug mode needs to do something debug-related (like doing a single
step), it will enter debug mode through a "breakpoint" instruction.
The monitor code will then return directly to user space, bypassing
its own saved registers if necessary (since we don't actually care
about the trapped context, only the one that came before.)

This adds three instructions to the common exception handling code,
including one branch. It does not touch super-hot paths like the TLB
miss handler.
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

Generate a new set of OCD register definitions in asm/ocd.h and rename
__mfdr() and __mtdr() to ocd_read() and ocd_write() respectively.

The bitfield definitions are a lot more complete now, and they are
entirely based on bit numbers, not masks. This is because OCD
registers are frequently accessed from assembly code, where bit
numbers are a lot more useful (can be fed directly to sbr, bfins,
etc.)

Bitfields that consist of more than one bit have two definitions:
_START, which indicates the number of the first bit, and _SIZE, which
indicates the number of bits. These directly correspond to the
parameters taken by the bfextu, bfexts and bfins instructions.
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

The 'H' bit is bit 29, while the 'R' bit doesn't exist. Luckily, we
don't actually use any of the bits in question.

Also update show_regs() to show the Debug Mask and Debug state bits.
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

We really need to check TIF_RESTORE_SIGMASK before returning to
userspace. The existing code does not necessarily do this.

Define the work masks as a bitwise OR of the respective flags instead
of a hardcoded hex value to make it easier to spot errors like this in
the future.
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

Add a missing goto to error handling in the RXKAD security module for
AF_RXRPC.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

get_cpu() always returns zero on non-SMP builds, but we
really want the physical cpu number in this code in order
to do the right thing.

Based upon a non-SMP kernel boot failure report from Bernd Zeimetz.
Signed-off-by: David S. Miller <davem@davemloft.net>

The SET_VLAN_NAME_TYPE_CMD command w/o CAP_NET_ADMIN capability
doesn't release the rtnl lock.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

During accept/migrate the code attempts to copy the addresses from
the parent endpoint to the new endpoint.   However, if the parent
was bound to a wildcard address, then we end up pointlessly copying
all of the current addresses on the system.
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

SCTP accept code tries to add a newliy created socket
to a bind bucket without holding a lock.   On a really
busy system, that can causes slab corruptions.
Add a lock around this code.
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

ip_rt_advice has been gone, so no need to keep prototype and debug message.
Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

IPv4 stack doesn't reply any ICMP destination unreachable message
with net unreachable code when IP detagrams are being discarded
because of no route could be found in the forwarding path.
Incidentally, IPv6 stack replies such ICMPv6 message in the similar
situation.
Signed-off-by: Mitsuru Chinen <mitch@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Convert part of the led trigger core from rw spinlocks to rw
semaphores. We're calling functions which can sleep from invalid
contexts otherwise. Fixes bug #9264.
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>

IPv6 stack doesn't increment OutNoRoutes counter when IP datagrams
is being discarded because no route could be found to transmit them
to their destination. IPv6 stack should increment the counter.
Incidentally, IPv4 stack increments that counter in such situation.
Signed-off-by: Mitsuru Chinen <mitch@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

WARNING: vmlinux.o(.init.text+0x204e2): Section mismatch: reference to .exit.text:br_fdb_fini (between 'br_init' and 'br_fdb_init')
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

The LED in the current driver will not be controlled correctly. During
a link change the carrier of the link is not available and the LED
will never turn on.
Signed-off-by: David S. Miller <davem@davemloft.net>

* 'merge' of master.kernel.org:/pub/scm/linux/kernel/git/paulus/powerpc:
  [POWERPC] virtex bug fix: Use canonical value for AC97 interrupt xparams
  [POWERPC] Update defconfigs
  [POWERPC] PS3: Update ps3_defconfig
  [POWERPC] Update iseries_defconfig
  [POWERPC] Fix hardware IRQ time accounting problem.

The ml300 and ml403 xparameters.h files use different macros for the
AC97 interrupt pin assignments.  This normalizes them to a canonical
value similar to what EDK generates for most other devices.  This is
needed to get ml300 support to compile in arch/ppc.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
  ACPI: suspend: old debugging hacks sneaked back
  Freezer: Fix JFFS2 garbage collector freezing issue (rev. 2)
  HWMON: coretemp, suspend fix
  Freezer: Fix APM emulation breakage
  Freezer: Fix s2disk resume from initrd