This reverts commit ded9db38.

Thierry Reding writes:
	This causes a boot regression on at least one board, caused by
	one of the drivers looking at driver data to check whether or
	not the driver has properly loaded. If the code encounters a
	non-NULL pointer it tries to dereference it, but because it's
	already been freed there is no memory backing it and things
	crash.

	I don't think keeping stale pointers around is a good idea. The
	whole point of setting this to NULL in the core is so that probe
	failures result in the same starting conditions no matter what.

	Can we please get this reverted?
Reported-by: Thierry Reding <thierry.reding@gmail.com>
Cc: Yi Zhang <yizhang_hust@163.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The WinSystems WS16C48 communicates via the ISA bus. As such, it is more
appropriate to use the ISA bus driver over the platform driver to
control the WinSystems WS16C48 GPIO driver.

This patch also adds support for multiple devices via the base and irq
module array parameters. Each element of the base array corresponds to a
discrete device; each element of the irq array corresponds to the
respective device addressed in the respective base array element.
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Alexandre Courbot <gnurou@gmail.com>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The ACCES 104-IDIO-16 series communicates via the ISA bus. As such, it
is more appropriate to use the ISA bus driver over the platform driver
to control the ACCES 104-IDIO-16 GPIO driver.

This patch also adds support for multiple devices via the base and irq
module array parameters. Each element of the base array corresponds to a
discrete device; each element of the irq array corresponds to the
respective device addressed in the respective base array element.
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Alexandre Courbot <gnurou@gmail.com>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The ACCES 104-IDI-48 series communicates via the ISA bus. As such, it
is more appropriate to use the ISA bus driver over the platform driver
to control the ACCES 104-IDI-48 GPIO driver.

This patch also adds support for multiple devices via the base and irq
module array parameters. Each element of the base array corresponds to a
discrete device; each element of the irq array corresponds to the
respective device addressed in the respective base array element.
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Alexandre Courbot <gnurou@gmail.com>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The ACCES 104-DIO-48E series communicates via the ISA bus. As such, it
is more appropriate to use the ISA bus driver over the platform driver
to control the ACCES 104-DIO-48E GPIO driver.

This patch also adds support for multiple devices via the base and irq
module array parameters. Each element of the base array corresponds to a
discrete device; each element of the irq array corresponds to the
respective device addressed in the respective base array element.
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Alexandre Courbot <gnurou@gmail.com>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The WinSystems EBC-C384 watchdog timer is controlled via ISA bus
communication. As such, the ISA bus driver is more appropriate than the
platform driver for the WinSystems EBC-C384 watchdog timer driver.

Cc: Wim Van Sebroeck <wim@iguana.be>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The Apex Embedded Systems STX104 DAC drivers does not do anything
special in module init/exit. This patch eliminates the module init/exit
boilerplate code by utilizing the module_isa_driver macro.

Additionally, the max_num_isa_dev macro is utilized to simplify the
determination of maximum possible STX104 devices in the system.

Cc: Jonathan Cameron <jic23@kernel.org>
Cc: Hartmut Knaack <knaack.h@gmx.de>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The Apex Embedded Systems STX104 DAC driver expects the STX104 device to
be I/O port-mapped addressable on an X86 platform. This patch adds an
explicit X86 dependency to the STX104 configuration option to prevent
building on non-X86 architectures.

Cc: Jonathan Cameron <jic23@kernel.org>
Cc: Hartmut Knaack <knaack.h@gmx.de>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

This is a verbatim copy of the original commit message of the initial
commit of the ISA bus driver authored by Rene Herman. Descriptions of
the module_isa_driver macro and max_num_isa_dev macro are provided at
the end.
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

max_num_isa_dev is a macro to determine the maximum possible number of
ISA devices which may be registered in the I/O port address space given
the address extent of the ISA devices.

The highest base address possible for an ISA device is 0x3FF; this
results in 1024 possible base addresses. Dividing the number of possible
base addresses by the address extent taken by each device results in the
maximum number of devices on a system.
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The module_isa_driver macro is a helper macro for ISA drivers which do
not do anything special in module init/exit. This eliminates a lot of
boilerplate code. Each module may only use this macro once, and calling
it replaces module_init and module_exit.
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The PNPBIOS driver requires preprocessor defines (located in
include/asm/segment.h) only declared if the architecture is set to
X86_32. If the architecture is set to X86_64, the PNPBIOS driver will
not build properly. The X86 dependecy for the PNPBIOS configuration
option is changed to an explicit X86_32	dependency in order to prevent
an attempt to build for an unsupported architecture.
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The introduction of the ISA_BUS option blocks the compilation of ISA
drivers on non-x86 platforms. The ISA_BUS configuration option should
not be necessary if the X86_32 dependency can be decoupled from the ISA
configuration option. This patch both removes the ISA_BUS configuration
option entirely and removes the X86_32 dependency from the ISA
configuration option.
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

dev_dbg_ratelimited() is a macro that ignores its first argument when DEBUG is
not set, which can lead to unused variable warnings:

ethernet/mellanox/mlxsw/pci.c: In function 'mlxsw_pci_cqe_sdq_handle':
ethernet/mellanox/mlxsw/pci.c:646:18: warning: unused variable 'pdev' [-Wunused-variable]
ethernet/mellanox/mlxsw/pci.c: In function 'mlxsw_pci_cqe_rdq_handle':
ethernet/mellanox/mlxsw/pci.c:671:18: warning: unused variable 'pdev' [-Wunused-variable]

The macro already ensures that all its other arguments are silently
ignored by the compiler without triggering a warning, through the
use of the no_printk() macro, but the dev argument is not passed into
that.

This changes the definition to use the same trick as no_printk() with
an if(0) that leads the compiler to not evaluate the side-effects but
still see that 'dev' might not be unused.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Suggested-by: Andrew Lunn <andrew@lunn.ch>
Fixes: 6f586e66 ("driver-core: Shut up dev_dbg_reatelimited() without DEBUG")
Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

the driver_data may be used for sanity check, it fails the
probe() if driver_data is NULL after it is re-triggered.
for example, soc_probe() in sound/soc/soc-core.c
Signed-off-by: Yi Zhang <yizhang_hust@163.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

A fault in a user provided buffer may lead anywhere, and lockdep warns
that we have a potential deadlock between the mm->mmap_sem and the
kernfs file mutex:

[   82.811702] ======================================================
[   82.811705] [ INFO: possible circular locking dependency detected ]
[   82.811709] 4.5.0-rc4-gfxbench+ #1 Not tainted
[   82.811711] -------------------------------------------------------
[   82.811714] kms_setmode/5859 is trying to acquire lock:
[   82.811717]  (&dev->struct_mutex){+.+.+.}, at: [<ffffffff8150d9c1>] drm_gem_mmap+0x1a1/0x270
[   82.811731]
but task is already holding lock:
[   82.811734]  (&mm->mmap_sem){++++++}, at: [<ffffffff8117b364>] vm_mmap_pgoff+0x44/0xa0
[   82.811745]
which lock already depends on the new lock.

[   82.811749]
the existing dependency chain (in reverse order) is:
[   82.811752]
-> #3 (&mm->mmap_sem){++++++}:
[   82.811761]        [<ffffffff810cc883>] lock_acquire+0xc3/0x1d0
[   82.811766]        [<ffffffff8118bc65>] __might_fault+0x75/0xa0
[   82.811771]        [<ffffffff8124da4a>] kernfs_fop_write+0x8a/0x180
[   82.811787]        [<ffffffff811d1023>] __vfs_write+0x23/0xe0
[   82.811792]        [<ffffffff811d1d74>] vfs_write+0xa4/0x190
[   82.811797]        [<ffffffff811d2c14>] SyS_write+0x44/0xb0
[   82.811801]        [<ffffffff817bb81b>] entry_SYSCALL_64_fastpath+0x16/0x73
[   82.811807]
-> #2 (s_active#6){++++.+}:
[   82.811814]        [<ffffffff810cc883>] lock_acquire+0xc3/0x1d0
[   82.811819]        [<ffffffff8124c070>] __kernfs_remove+0x210/0x2f0
[   82.811823]        [<ffffffff8124d040>] kernfs_remove_by_name_ns+0x40/0xa0
[   82.811828]        [<ffffffff8124e9e0>] sysfs_remove_file_ns+0x10/0x20
[   82.811832]        [<ffffffff815318d4>] device_del+0x124/0x250
[   82.811837]        [<ffffffff81531a19>] device_unregister+0x19/0x60
[   82.811841]        [<ffffffff8153c051>] cpu_cache_sysfs_exit+0x51/0xb0
[   82.811846]        [<ffffffff8153c628>] cacheinfo_cpu_callback+0x38/0x70
[   82.811851]        [<ffffffff8109ae89>] notifier_call_chain+0x39/0xa0
[   82.811856]        [<ffffffff8109aef9>] __raw_notifier_call_chain+0x9/0x10
[   82.811860]        [<ffffffff810786de>] cpu_notify+0x1e/0x40
[   82.811865]        [<ffffffff81078779>] cpu_notify_nofail+0x9/0x20
[   82.811869]        [<ffffffff81078ac3>] _cpu_down+0x233/0x340
[   82.811874]        [<ffffffff81079019>] disable_nonboot_cpus+0xc9/0x350
[   82.811878]        [<ffffffff810d2e11>] suspend_devices_and_enter+0x5a1/0xb50
[   82.811883]        [<ffffffff810d3903>] pm_suspend+0x543/0x8d0
[   82.811888]        [<ffffffff810d1b77>] state_store+0x77/0xe0
[   82.811892]        [<ffffffff813fa68f>] kobj_attr_store+0xf/0x20
[   82.811897]        [<ffffffff8124e740>] sysfs_kf_write+0x40/0x50
[   82.811902]        [<ffffffff8124dafc>] kernfs_fop_write+0x13c/0x180
[   82.811906]        [<ffffffff811d1023>] __vfs_write+0x23/0xe0
[   82.811910]        [<ffffffff811d1d74>] vfs_write+0xa4/0x190
[   82.811914]        [<ffffffff811d2c14>] SyS_write+0x44/0xb0
[   82.811918]        [<ffffffff817bb81b>] entry_SYSCALL_64_fastpath+0x16/0x73
[   82.811923]
-> #1 (cpu_hotplug.lock){+.+.+.}:
[   82.811929]        [<ffffffff810cc883>] lock_acquire+0xc3/0x1d0
[   82.811933]        [<ffffffff817b6f72>] mutex_lock_nested+0x62/0x3b0
[   82.811940]        [<ffffffff810784c1>] get_online_cpus+0x61/0x80
[   82.811944]        [<ffffffff811170eb>] stop_machine+0x1b/0xe0
[   82.811949]        [<ffffffffa0178edd>] gen8_ggtt_insert_entries__BKL+0x2d/0x30 [i915]
[   82.812009]        [<ffffffffa017d3a6>] ggtt_bind_vma+0x46/0x70 [i915]
[   82.812045]        [<ffffffffa017eb70>] i915_vma_bind+0x140/0x290 [i915]
[   82.812081]        [<ffffffffa01862b9>] i915_gem_object_do_pin+0x899/0xb00 [i915]
[   82.812117]        [<ffffffffa0186555>] i915_gem_object_pin+0x35/0x40 [i915]
[   82.812154]        [<ffffffffa019a23e>] intel_init_pipe_control+0xbe/0x210 [i915]
[   82.812192]        [<ffffffffa0197312>] intel_logical_rings_init+0xe2/0xde0 [i915]
[   82.812232]        [<ffffffffa0186fe3>] i915_gem_init+0xf3/0x130 [i915]
[   82.812278]        [<ffffffffa02097ed>] i915_driver_load+0xf2d/0x1770 [i915]
[   82.812318]        [<ffffffff81512474>] drm_dev_register+0xa4/0xb0
[   82.812323]        [<ffffffff8151467e>] drm_get_pci_dev+0xce/0x1e0
[   82.812328]        [<ffffffffa01472cf>] i915_pci_probe+0x2f/0x50 [i915]
[   82.812360]        [<ffffffff8143f907>] pci_device_probe+0x87/0xf0
[   82.812366]        [<ffffffff81535f89>] driver_probe_device+0x229/0x450
[   82.812371]        [<ffffffff81536233>] __driver_attach+0x83/0x90
[   82.812375]        [<ffffffff81533c61>] bus_for_each_dev+0x61/0xa0
[   82.812380]        [<ffffffff81535879>] driver_attach+0x19/0x20
[   82.812384]        [<ffffffff8153535f>] bus_add_driver+0x1ef/0x290
[   82.812388]        [<ffffffff81536e9b>] driver_register+0x5b/0xe0
[   82.812393]        [<ffffffff8143e83b>] __pci_register_driver+0x5b/0x60
[   82.812398]        [<ffffffff81514866>] drm_pci_init+0xd6/0x100
[   82.812402]        [<ffffffffa027c094>] 0xffffffffa027c094
[   82.812406]        [<ffffffff810003de>] do_one_initcall+0xae/0x1d0
[   82.812412]        [<ffffffff811595a0>] do_init_module+0x5b/0x1cb
[   82.812417]        [<ffffffff81106160>] load_module+0x1c20/0x2480
[   82.812422]        [<ffffffff81106bae>] SyS_finit_module+0x7e/0xa0
[   82.812428]        [<ffffffff817bb81b>] entry_SYSCALL_64_fastpath+0x16/0x73
[   82.812433]
-> #0 (&dev->struct_mutex){+.+.+.}:
[   82.812439]        [<ffffffff810cbe59>] __lock_acquire+0x1fc9/0x20f0
[   82.812443]        [<ffffffff810cc883>] lock_acquire+0xc3/0x1d0
[   82.812456]        [<ffffffff8150d9e7>] drm_gem_mmap+0x1c7/0x270
[   82.812460]        [<ffffffff81196a14>] mmap_region+0x334/0x580
[   82.812466]        [<ffffffff81196fc4>] do_mmap+0x364/0x410
[   82.812470]        [<ffffffff8117b38d>] vm_mmap_pgoff+0x6d/0xa0
[   82.812474]        [<ffffffff811950f4>] SyS_mmap_pgoff+0x184/0x220
[   82.812479]        [<ffffffff8100a0fd>] SyS_mmap+0x1d/0x20
[   82.812484]        [<ffffffff817bb81b>] entry_SYSCALL_64_fastpath+0x16/0x73
[   82.812489]
other info that might help us debug this:

[   82.812493] Chain exists of:
  &dev->struct_mutex --> s_active#6 --> &mm->mmap_sem

[   82.812502]  Possible unsafe locking scenario:

[   82.812506]        CPU0                    CPU1
[   82.812508]        ----                    ----
[   82.812510]   lock(&mm->mmap_sem);
[   82.812514]                                lock(s_active#6);
[   82.812519]                                lock(&mm->mmap_sem);
[   82.812522]   lock(&dev->struct_mutex);
[   82.812526]
 *** DEADLOCK ***

[   82.812531] 1 lock held by kms_setmode/5859:
[   82.812533]  #0:  (&mm->mmap_sem){++++++}, at: [<ffffffff8117b364>] vm_mmap_pgoff+0x44/0xa0
[   82.812541]
stack backtrace:
[   82.812547] CPU: 0 PID: 5859 Comm: kms_setmode Not tainted 4.5.0-rc4-gfxbench+ #1
[   82.812550] Hardware name:                  /NUC5CPYB, BIOS PYBSWCEL.86A.0040.2015.0814.1353 08/14/2015
[   82.812553]  0000000000000000 ffff880079407bf0 ffffffff813f8505 ffffffff825fb270
[   82.812560]  ffffffff825c4190 ffff880079407c30 ffffffff810c84ac ffff880079407c90
[   82.812566]  ffff8800797ed328 ffff8800797ecb00 0000000000000001 ffff8800797ed350
[   82.812573] Call Trace:
[   82.812578]  [<ffffffff813f8505>] dump_stack+0x67/0x92
[   82.812582]  [<ffffffff810c84ac>] print_circular_bug+0x1fc/0x310
[   82.812586]  [<ffffffff810cbe59>] __lock_acquire+0x1fc9/0x20f0
[   82.812590]  [<ffffffff810cc883>] lock_acquire+0xc3/0x1d0
[   82.812594]  [<ffffffff8150d9c1>] ? drm_gem_mmap+0x1a1/0x270
[   82.812599]  [<ffffffff8150d9e7>] drm_gem_mmap+0x1c7/0x270
[   82.812603]  [<ffffffff8150d9c1>] ? drm_gem_mmap+0x1a1/0x270
[   82.812608]  [<ffffffff81196a14>] mmap_region+0x334/0x580
[   82.812612]  [<ffffffff81196fc4>] do_mmap+0x364/0x410
[   82.812616]  [<ffffffff8117b38d>] vm_mmap_pgoff+0x6d/0xa0
[   82.812629]  [<ffffffff811950f4>] SyS_mmap_pgoff+0x184/0x220
[   82.812633]  [<ffffffff8100a0fd>] SyS_mmap+0x1d/0x20
[   82.812637]  [<ffffffff817bb81b>] entry_SYSCALL_64_fastpath+0x16/0x73

Highly unlikely though this scenario is, we can avoid the issue entirely
by moving the copy operation from out under the kernfs_get_active()
tracking by assigning the preallocated buffer its own mutex. The
temporary buffer allocation doesn't require mutex locking as it is
entirely local.

The locked section was extended by the addition of the preallocated buf
to speed up md user operations in

commit 2b75869b
Author: NeilBrown <neilb@suse.de>
Date:   Mon Oct 13 16:41:28 2014 +1100

    sysfs/kernfs: allow attributes to request write buffer be pre-allocated.
Reported-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=94350Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: NeilBrown <neilb@suse.de>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

We want those fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Pull device mapper fix from Mike Snitzer:
 "Fix for earlier 4.6-rc4 stable@ commit that introduced improper use of
  write lock in cmd_read_lock() -- due to cut-n-paste gone awry (and
  sparse didn't catch it)"

* tag 'dm-4.6-fix-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm cache metadata: fix cmd_read_lock() acquiring write lock

Commit 9567366f ("dm cache metadata: fix READ_LOCK macros and
cleanup WRITE_LOCK macros") uses down_write() instead of down_read() in
cmd_read_lock(), yet up_read() is used to release the lock in
READ_UNLOCK().  Fix it.

Fixes: 9567366f ("dm cache metadata: fix READ_LOCK macros and cleanup WRITE_LOCK macros")
Cc: stable@vger.kernel.org
Signed-off-by: Ahmed Samy <f.fallen45@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

Pull char/misc fixes from Greg KH:
 "Here are some small char/misc driver fixes for 4.6-rc4.  Full details
  are in the shortlog, nothing major here.

  These have all been in linux-next for a while with no reported issues"

* tag 'char-misc-4.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  lkdtm: do not leak free page on kmalloc failure
  lkdtm: fix memory leak of base
  lkdtm: fix memory leak of val
  extcon: palmas: Drop stray IRQF_EARLY_RESUME flag

Pull misc fixes from Greg KH:
 "Here are three small fixes for 4.6-rc4.

  Two fix up some lz4 issues with big endian systems, and the remaining
  one resolves a minor debugfs issue that was reported.

  All have been in linux-next with no reported issues"

* tag 'driver-core-4.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
  lib: lz4: cleanup unaligned access efficiency detection
  lib: lz4: fixed zram with lz4 on big endian machines
  debugfs: Make automount point inodes permanently empty

Pull USB driver fixes from Greg KH:
 "Here are some small USB fixes for 4.6-rc4.

  Mostly xhci fixes for reported issues, a UAS bug that has hit a number
  of people, including stable tree users, and a few other minor things.

  All have been in linux-next for a while with no reported issues"

* tag 'usb-4.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  usb: hcd: out of bounds access in for_each_companion
  USB: uas: Add a new NO_REPORT_LUNS quirk
  USB: uas: Limit qdepth at the scsi-host level
  doc: usb: Fix typo in gadget_multi documentation
  usb: host: xhci-plat: Make enum xhci_plat_type start at a non zero value
  xhci: fix 10 second timeout on removal of PCI hotpluggable xhci controllers
  usb: xhci: fix wild pointers in xhci_mem_cleanup
  usb: host: xhci-plat: fix cannot work if R-Car Gen2/3 run on above 4GB phys
  usb: host: xhci: add a new quirk XHCI_NO_64BIT_SUPPORT
  xhci: resume USB 3 roothub first
  usb: xhci: applying XHCI_PME_STUCK_QUIRK to Intel BXT B0 host
  cdc-acm: fix crash if flushed with nothing buffered

Pull dmaengine fixes from Vinod Koul:
 "This time we have some odd fixes in hsu, edma, omap and xilinx.

  Usual fixes and nothing special"

* tag 'dmaengine-fix-4.6-rc4' of git://git.infradead.org/users/vkoul/slave-dma:
  dmaengine: dw: fix master selection
  dmaengine: edma: special case slot limit workaround
  dmaengine: edma: Remove dynamic TPTC power management feature
  dmaengine: vdma: don't crash when bad channel is requested
  dmaengine: omap-dma: Do not suppress interrupts for memcpy
  dmaengine: omap-dma: Fix polled channel completion detection and handling
  dmaengine: hsu: correct use of channel status register
  dmaengine: hsu: correct residue calculation of active descriptor
  dmaengine: hsu: set HSU_CH_MTSR to memory width

Pull locking fixlet from Ingo Molnar:
 "Fixes a build warning on certain Kconfig combinations"

* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  locking/lockdep: Fix print_collision() unused warning

Pull EFI fix from Ingo Molnar:
 "An arm64 boot crash fix"

* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  efi/arm64: Don't apply MEMBLOCK_NOMAP to UEFI memory map mapping

Pull block fixes from Jens Axboe:
 "A few fixes for the current series. This contains:

   - Two fixes for NVMe:

     One fixes a reset race that can be triggered by repeated
     insert/removal of the module.

     The other fixes an issue on some platforms, where we get probe
     timeouts since legacy interrupts isn't working.  This used not to
     be a problem since we had the worker thread poll for completions,
     but since that was killed off, it means those poor souls can't
     successfully probe their NVMe device.  Use a proper IRQ check and
     probe (msi-x -> msi ->legacy), like most other drivers to work
     around this.  Both from Keith.

   - A loop corruption issue with offset in iters, from Ming Lei.

   - A fix for not having the partition stat per cpu ref count
     initialized before sending out the KOBJ_ADD, which could cause user
     space to access the counter prior to initialization.  Also from
     Ming Lei.

   - A fix for using the wrong congestion state, from Kaixu Xia"

* 'for-linus' of git://git.kernel.dk/linux-block:
  block: loop: fix filesystem corruption in case of aio/dio
  NVMe: Always use MSI/MSI-x interrupts
  NVMe: Fix reset/remove race
  writeback: fix the wrong congested state variable definition
  block: partition: initialize percpuref before sending out KOBJ_ADD

Pull libnvdimm fixes from Ross Zwisler:
 "Two fixes:

   - Fix memcpy_from_pmem() to fallback to memcpy() for architectures
     where CONFIG_ARCH_HAS_PMEM_API=n.

   - Add a comment explaining why we write data twice when clearing
     poison in pmem_do_bvec().

  This has passed a boot test on an X86_32 config, which was the
  architecture where issue #1 above was first noticed"

Dan Williams adds:
 "We're giving this multi-maintainer setup a shot, so expect libnvdimm
  pull requests from either Ross or I going forward"

* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  libnvdimm, pmem: clarify the write+clear_poison+write flow
  pmem: fix BUG() error in pmem.h:48 on X86_32

Pull MTD fix from Brian Norris:
 "One MTD fix for v4.6-rc4:

  In the v4.4 cycle, we relaxed the requirement for assigning
  mtd->owner, but we didn't remove this error case.  It's hit only
  by drivers that are both:

   (a) using nand_scan() directly
  and
   (b) built as modules

  We haven't seen explicit complaints about this (most use cases don't
  fit one or both of the above), but we should definitely not be
  BUG()'ing here"

* tag 'for-linus-20160415' of git://git.infradead.org/linux-mtd:
  mtd: nand: Drop mtd.owner requirement in nand_scan

Pull MMC fixes from Ulf Hansson:
 "Here are a couple of mmc fixes intended for v4.6 rc4.

  Regarding the fix for the regression about mmcblk device indexes.  The
  approach taken to solve the problem seems to be good enough.  There
  were some discussions around the solution, but it seems like people
  were happy about it in the end.

  MMC core:
   - Restore similar old behaviour when assigning mmcblk device indexes

  MMC host:
   - tegra: Disable UHS-I modes for Tegra124 to fix regression"

* tag 'mmc-v4.6-rc3' of git://git.linaro.org/people/ulf.hansson/mmc:
  mmc: tegra: Disable UHS-I modes for Tegra124
  mmc: block: Use the mmc host device index as the mmcblk device index

Pull drm fixes from Dave Airlie:
 "This contains fixes for exynos, amdgpu, radeon, i915 and qxl.

  It also contains some fixes to the core drm edid parser.

  qxl:
   - fix for a cursor hotspot issue

  radeon:
   - some MST fixes that I've been running locally and make my monitor a
     bit happier

  exynos:
   - fix some regressions and build fixes

  amdgpu:
   - a couple of small fixes

  i915:
   - two DP MST fixes and a couple of other regression fixes

  Nothing too out of the ordinary or surprising at this point"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/exynos: Use VIDEO_SAMSUNG_S5P_G2D=n as G2D Kconfig dependency
  drm/exynos: fix a warning message
  drm/exynos: mic: fix an error code
  drm/exynos: fimd: fix broken dp_clock control
  drm/exynos: build fbdev code conditionally
  drm/exynos: fix adjusted_mode pointer in exynos_plane_mode_set
  drm/exynos: fix error handling in exynos_drm_subdrv_open
  drm/amd/amdgpu: fix irq domain remove for tonga ih
  drm/i915: fix deadlock on lid open
  drm/radeon: use helper for mst connector dpms.
  drm/radeon/mst: port some MST setup code from DAL.
  drm/amdgpu: add invisible pin size statistic
  drm/edid: Fix DMT 1024x768@43Hz (interlaced) timings
  drm/i915: Exit cherryview_irq_handler() after one pass
  drm/i915: Call intel_dp_mst_resume() before resuming displays
  drm/i915: Fix race condition in intel_dp_destroy_mst_connector()
  drm/edid: Fix parsing of EDID 1.4 Established Timings III descriptor
  drm/edid: Fix EDID Established Timings I and II
  drm/qxl: fix cursor position with non-zero hotspot

Pull parisc ftrace fixes from Helge Deller:
 "This is (most likely) the last pull request for v4.6 for the parisc
  architecture.

  It fixes the FTRACE feature for parisc, which is horribly broken since
   quite some time and doesn't even compile.  This patch just fixes the
  bare minimum (it actually removes more lines than it adds), so that
  the function tracer works again on 32- and 64bit kernels.

  I've queued up additional patches on top of this patch which e.g. add
  the syscall tracer, but those have to wait for the merge window for
  v4.7."

* 'parisc-4.6-4' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Fix ftrace function tracer

The ACPI specification does not specify the state of data after a clear
poison operation.  Potential future libnvdimm bus implementations for
other architectures also might not specify or disagree on the state of
data after clear poison.  Clarify why we write twice.
Reported-by: Jeff Moyer <jmoyer@redhat.com>
Reported-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Reviewed-by: Vishal Verma <vishal.l.verma@intel.com>

Add scatterlist support (dev_coredumpsg) to allow drivers to avoid
vmalloc() like dev_coredumpm(), while also avoiding the module
reference that the latter function requires.

This internally uses dev_coredumpm() with function inside the
devcoredump module, requiring removing the const
(which touches the driver using it.)
Signed-off-by: Aviya Erenfeld <aviya.erenfeld@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Starting from commit e36f6204(block: split bios to max possible length),
block core starts to split bio in the middle of bvec.

Unfortunately loop dio/aio doesn't consider this situation, and
always treat 'iter.iov_offset' as zero. Then filesystem corruption
is observed.

This patch figures out the offset of the base bvevc via
'bio->bi_iter.bi_bvec_done' and fixes the issue by passing the offset
to iov iterator.

Fixes: e36f6204 (block: split bios to max possible length)
Cc: Keith Busch <keith.busch@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: stable@vger.kernel.org (4.5)
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

Pull x86 fixes from Ingo Molnar:
 "Misc fixes: a binutils fix, an lguest fix, an mcelog fix and a missing
  documentation fix"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mce: Avoid using object after free in genpool
  lguest, x86/entry/32: Fix handling of guest syscalls using interrupt gates
  x86/build: Build compressed x86 kernels as PIE
  x86/mm/pkeys: Add missing Documentation