This patch adds the /sys/module/libfc/parameters/debug_logging
file to sysfs as a module parameter. It accepts an integer
bitmask for logging. Currently it supports:

   bit
LSB 0 = general libfc debugging
    1 = lport debugging
    2 = disc debugging
    3 = rport debugging
    4 = fcp debugging
    5 = EM debugging
    6 = exch/seq debugging
    7 = scsi logging (mostly error handling)

the other bits are not used at this time.

The patch converts all of the libfc source files to use
these new macros and removes the old FC_DBG macro.
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

This patch adds a 'debug_logging' module parameter to
libfcoe.ko. It is an unsigned int that represents a bitmask of
available debug logging levels, each of which can be tuned at
runtime. Currently there are only two logging levels for this
module-

   bit
LSB 0 = libfcoe general logging
    1 = FIP logging
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

This patch converts all FC_DBG statements to use new runtime tunable
debug macros. The fcoe.ko module now has a debug_logging module
parameter.

fcoe_debug_logging is an unsigned integer representing a bitmask of all
available logging levels. Currently only two logging levels are
supported-

   bit
LSB 0 = general fcoe logging
    1 = netdevice related logging

This patch also attempts to clean up some debug statement formatting
so it's more readable.
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

This patch adds support for setting the physical block exponent and
lowest aligned LBA in the READ CAPACITY(16) response.

The B0 VPD page is adjusted accordingly.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

NETDEVICES + NETDEV_1000 need to be enabled so that kconfig will check
those branches for selects and enforce "select UIO" under CNIC.
Otherwise the build fails with:

ERROR: "uio_unregister_device" [drivers/net/cnic.ko] undefined!
ERROR: "uio_event_notify" [drivers/net/cnic.ko] undefined!
ERROR: "__uio_register_device" [drivers/net/cnic.ko] undefined!
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Acked-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

Ingo molnar <mingo@elte.hu> reported the error

drivers/net/cnic.c:2520: error: implicit declaration of function ‘__symbol_get’

when CONFIG_MODULES is not defined.  Fix by using symbol_get() instead.
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

This reverts commit bc3bf8fd.

All the commit did was add a second #include of <linux/module.h> which is
the wrong fix.
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

MSI has only been tested on and known to work with PCI-E based adapters.  This
patch adds a field to struct ipr_chip_t to indicate which type of interrupt to
use based on what is known about the chip.
Signed-off-by: Wayne Boyer <wayneb@linux.vnet.ibm.com>
Acked-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

The return value from pci_enable_msi() can not always be trusted.  This patch
adds code to generate an interrupt after MSI has been enabled and tests
whether or not we can receive and process it.  If the tests fails, then fall
back to LSI.
Signed-off-by: Wayne Boyer <wayneb@linux.vnet.ibm.com>
Acked-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

There have been several bug reports which identified the Ultrium-3
tape as just hanging up on the bus during certain types of IU
transfer.  The identified culpret is type 0x02 (MULTIPLE COMMAND)
transfers.  The only way to prevent this tape wedging is to prevent it
from using IU transfers at all.  So this patch uses the exported
blacklist matching technology to recognise the drive and force it not
to use IU transfers.
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

Right at the moment, we carefully set up the spi_support_xx in the
device configuration routines, but then we never actually use the
results: we rely on the inquiry strings.  If we're going to allow
overrides to the inquiry data, we have to rely on our own internal
settings.
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

The current scsi_devinfo.c matching routines use a single table for
the global blacklist.  However, we're developing a need to blacklist
from specific transports too (notably some tape drives using SPI which
don't respond well to high speed protocols).  Instead of developing
separate blacklist matching for each transport class needing it,
enhance the current list matching to permit multiple lists.
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

Commit 7b867cf7 ([SCSI] qla2xxx:
Refactor qla data structures) inadvertently reverted
e792121e ([SCSI] qla2xxx: Correct
overflow during dump-processing on large-memory ISP23xx parts.).

Cc: stable@kernel.org
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

Pre-ISP24xx chips have dedicated uses for mailbox 4 and 5 which
software should typically not query nor update.
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

* To set iiDMA speeds for ISP81XX, bits 5-0 are used whereas for
  other older ISPs bits 2-0 are used.
* Pass proper VP index
Signed-off-by: Harish Zunjarrao <harish.zunjarrao@qlogic.com>
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

Cc: stable@kernel.org
Signed-off-by: Anirban Chakraborty <anirban.chakraborty@qlogic.com>
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

Just once, two fcoe instances got the same host number
from scsi_add_host().

Use atomic_t and atomic_inc_return() to get next host number.
Subtract 1, so that scsi_host still starts with 0.

[jejb: added comment about unusual subtraction]
Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

The SMP handler (sas_smp_request) was fixed to use the block API
properly, so we don't need this workaround to avoid blk_put_request()
warning.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

We need to call blk_end_request_all to complete SMP requests properly.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

Allow the user to control the debug logs in libiscsi. We will now
have a module param for connection, session & error handling.

[Mike Christie - Fixed up to compile on current code and added
missing ISCSI_DBG_EH conversions]
Signed-off-by: Erez Zilber <erezzi.list@gmail.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

The net layer might return -EAGAIN because it could not
get space/mem within the sock sndtimeo or becuase the tcp/ip
connection was down. For the latter we do not want to retry
because the conn/session should just be shutdown and restarted.
libiscsi knows the state of the session recovery so propogate
this error to that layer. It will either do iscsi recovery
or have us retry the operation. Right now if we have partially
sent a pdu we would always retry the IO xmit slowing down
recovery.
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

If we are sending or receiving data for the task successfully do
not run the scsi eh, because we know the task is making progress.
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

The default kernel pages supported are 4K, 8K, 16K, and 64K. Re-calculate
entries if PAGE_SIZE is not one of the defaults.
Signed-off-by: Karen Xie <kxie@chelsio.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

The iscsi ddp functionality could be used by multiple iscsi entities,
add a refcnt to keep track of it, so we would not release it pre-maturely.
Signed-off-by: Karen Xie <kxie@chelsio.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

Query the block limits VPD page and adjust queue minimum and optimal I/O
sizes.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

Detect non-rotational devices and set the queue flag accordingly.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

Extract physical block size and lowest aligned LBA from READ
CAPACITY(16) response and adjust queue parameters.

Report physical block size and alignment when applicable.

[jejb: fix up trailing whitespace]
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

da456f14 "page allocator: do not disable interrupts in free_page_mlock()" moved
the PG_mlocked clearing after the flag sanity checking which makes mlocked
pages always trigger 'bad page'.  Fix this by clearing the bit up front.
Reported--and-debugged-by: Peter Chubb <peter.chubb@nicta.com.au>
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Tested-by: Maxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

The discussion about using "access_ok()" in get_user_pages_fast() (see
commit 7f818906: "x86: don't use
'access_ok()' as a range check in get_user_pages_fast()" for details and
end result), made us notice that x86-64 was really being very sloppy
about virtual address checking.

So be way more careful and straightforward about masking x86-64 virtual
addresses:

 - All the VIRTUAL_MASK* variants now cover half of the address
   space, it's not like we can use the full mask on a signed
   integer, and the larger mask just invites mistakes when
   applying it to either half of the 48-bit address space.

 - /proc/kcore's kc_offset_to_vaddr() becomes a lot more
   obvious when it transforms a file offset into a
   (kernel-half) virtual address.

 - Unify/simplify the 32-bit and 64-bit USER_DS definition to
   be based on TASK_SIZE_MAX.

This cleanup and more careful/obvious user virtual address checking also
uncovered a buglet in the x86-64 implementation of strnlen_user(): it
would do an "access_ok()" check on the whole potential area, even if the
string itself was much shorter, and thus return an error even for valid
strings. Our sloppy checking had hidden this.

So this fixes 'strnlen_user()' to do this properly, the same way we
already handled user strings in 'strncpy_from_user()'.  Namely by just
checking the first byte, and then relying on fault handling for the
rest.  That always works, since we impose a guard page that cannot be
mapped at the end of the user space address space (and even if we
didn't, we'd have the address space hole).
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Nick Piggin <npiggin@suse.de>
Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Merge branch 'irq-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'irq-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  genirq, irq.h: Fix kernel-doc warnings
  genirq: fix comment to say IRQ_WAKE_THREAD

Merge branch 'perfcounters-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'perfcounters-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (49 commits)
  perfcounter: Handle some IO return values
  perf_counter: Push perf_sample_data through the swcounter code
  perf_counter tools: Define and use our own u64, s64 etc. definitions
  perf_counter: Close race in perf_lock_task_context()
  perf_counter, x86: Improve interactions with fast-gup
  perf_counter: Simplify and fix task migration counting
  perf_counter tools: Add a data file header
  perf_counter: Update userspace callchain sampling uses
  perf_counter: Make callchain samples extensible
  perf report: Filter to parent set by default
  perf_counter tools: Handle lost events
  perf_counter: Add event overlow handling
  fs: Provide empty .set_page_dirty() aop for anon inodes
  perf_counter: tools: Makefile tweaks for 64-bit powerpc
  perf_counter: powerpc: Add processor back-end for MPC7450 family
  perf_counter: powerpc: Make powerpc perf_counter code safe for 32-bit kernels
  perf_counter: powerpc: Change how processor-specific back-ends get selected
  perf_counter: powerpc: Use unsigned long for register and constraint values
  perf_counter: powerpc: Enable use of software counters on 32-bit powerpc
  perf_counter tools: Add and use isprint()
  ...

Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/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 out of scope variable access in sched_slice()
  sched: Hide runqueues from direct refer at source code level
  sched: Remove unneeded __ref tag
  sched, x86: Fix cpufreq + sched_clock() TSC scaling

Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (24 commits)
  tracing/urgent: warn in case of ftrace_start_up inbalance
  tracing/urgent: fix unbalanced ftrace_start_up
  function-graph: add stack frame test
  function-graph: disable when both x86_32 and optimize for size are configured
  ring-buffer: have benchmark test print to trace buffer
  ring-buffer: do not grab locks in nmi
  ring-buffer: add locks around rb_per_cpu_empty
  ring-buffer: check for less than two in size allocation
  ring-buffer: remove useless compile check for buffer_page size
  ring-buffer: remove useless warn on check
  ring-buffer: use BUF_PAGE_HDR_SIZE in calculating index
  tracing: update sample event documentation
  tracing/filters: fix race between filter setting and module unload
  tracing/filters: free filter_string in destroy_preds()
  ring-buffer: use commit counters for commit pointer accounting
  ring-buffer: remove unused variable
  ring-buffer: have benchmark test handle discarded events
  ring-buffer: prevent adding write in discarded area
  tracing/filters: strloc should be unsigned short
  tracing/filters: operand can be negative
  ...

Fix up kmemcheck-induced conflict in kernel/trace/ring_buffer.c manually

Merge branch 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  NOHZ: Properly feed cpufreq ondemand governor

Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (45 commits)
  x86, mce: fix error path in mce_create_device()
  x86: use zalloc_cpumask_var for mce_dev_initialized
  x86: fix duplicated sysfs attribute
  x86: de-assembler-ize asm/desc.h
  i386: fix/simplify espfix stack switching, move it into assembly
  i386: fix return to 16-bit stack from NMI handler
  x86, ioapic: Don't call disconnect_bsp_APIC if no APIC present
  x86: Remove duplicated #include's
  x86: msr.h linux/types.h is only required for __KERNEL__
  x86: nmi: Add Intel processor 0x6f4 to NMI perfctr1 workaround
  x86, mce: mce_intel.c needs <asm/apic.h>
  x86: apic/io_apic.c: dmar_msi_type should be static
  x86, io_apic.c: Work around compiler warning
  x86: mce: Don't touch THERMAL_APIC_VECTOR if no active APIC present
  x86: mce: Handle banks == 0 case in K7 quirk
  x86, boot: use .code16gcc instead of .code16
  x86: correct the conversion of EFI memory types
  x86: cap iomem_resource to addressable physical memory
  x86, mce: rename _64.c files which are no longer 64-bit-specific
  x86, mce: mce.h cleanup
  ...

Manually fix up trivial conflict in arch/x86/mm/fault.c

* 'for-linus' of git://git.monstr.eu/linux-2.6-microblaze:
  microblaze: Add missing symbols for CONSTRUCTORS support
  microblaze: remove init_mm

* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-fixes:
  kernel-doc: fix param matching for array params
  kernel-doc: ignore kmemcheck_bitfield_begin/end
  kallsyms: fix inverted valid symbol checking
  kbuild: fix build error during make htmldocs

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (35 commits)
  Input: add driver for Synaptics I2C touchpad
  Input: synaptics - add support for reporting x/y resolution
  Input: ALPS - handle touchpoints buttons correctly
  Input: gpio-keys - change timer to workqueue
  Input: ads7846 - pin change interrupt support
  Input: add support for touchscreen on W90P910 ARM platform
  Input: appletouch - improve finger detection
  Input: wacom - clear Intuos4 wheel data when finger leaves proximity
  Input: ucb1400 - move static function from header into core
  Input: add driver for EETI touchpanels
  Input: ads7846 - more detailed model name in sysfs
  Input: ads7846 - support swapping x and y axes
  Input: ati_remote2 - use non-atomic bitops
  Input: introduce lm8323 keypad driver
  Input: psmouse - ESD workaround fix for OLPC XO touchpad
  Input: tsc2007 - make sure platform provides get_pendown_state()
  Input: uinput - flush all pending ff effects before destroying device
  Input: simplify name handling for certain input handles
  Input: serio - do not use deprecated dev.power.power_state
  Input: wacom - add support for Intuos4 tablets
  ...

* 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: (24 commits)
  agp/intel: Make intel_i965_mask_memory use dma_addr_t for physical addresses
  agp: add user mapping support to ATI AGP bridge.
  drm/i915: enable GEM on PAE.
  drm/radeon: fix unused variables warning
  agp: switch AGP to use page array instead of unsigned long array
  agpgart: detected ALi M???? chipset with M1621
  drm/radeon: command stream checker for r3xx-r5xx hardware
  drm/radeon: Fully initialize LVDS info also when we can't get it from the ROM.
  radeon: Fix CP byte order on big endian architectures with KMS.
  agp/uninorth: Handle user memory types.
  drm/ttm: Add some powerpc cache flush code.
  radeon: Enable modesetting on non-x86.
  drm/radeon: Respect AGP cant_use_aperture flag.
  drm: EDID endianness fixes.
  drm/radeon: this VRAM vs aperture test is wrong, just remove it.
  drm/ttm: fix an error path to exit function correctly
  drm: Apply "Memory fragmentation from lost alignment blocks"
  ttm: Return -ERESTART when a signal interrupts bo eviction.
  drm: Remove memory debugging infrastructure.
  drm/i915: Clear fence register on tiling stride change.
  ...