Prepare first round of input updates for 4.1 merge window.

Non interleaved V2 dualpoint touchpad / stick combos have separate stick
button bits in the touchpad packets, if we do not check these then the
trackpoint buttons will not work when using the touchpad, and when pressed
when the user starts using the touchpad will report a release event even
though the button is still pressed.

This commit fixes this by checking the separate bits, note that we simply
combine the buttons, since the hardware does the same when using the touchpad
buttons with the trackpoint, so we do not have enough information to properly
separate them.
Reported-by: Hans de Bruin <jmdebruin@xmsnet.nl>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

When the left touchpad button gets pressed, and then the trackpoint is
moved, and then the button is released, the following happens:

1) touchpad packet is received, touchpad evdev node reports BTN_LEFT 1

2) pointing stick packet is received, the hw will report a BTN_LEFT 1 in
   this packet because when the trackstick is active it communicates the
   combined touchpad + pointing stick buttons in the trackstick packet,
   since alps_report_bare_ps2_packet passes NULL (*) for the dev2 parameter
   to alps_report_buttons the combining is not detected and the
   pointing stick evdev node will also report BTN_LEFT 1

3) on release of the button a pointing stick packet with BTN_LEFT 0 is
   received and the pointing stick evdev node will report BTN_LEFT 0

Note how because of the passing as NULL for dev2 the touchpad evdev node
will never send BTN_LEFT 0 in this scenario leading to a stuck mouse button.

This is a regression in 4.0 introduced by commit 04aae283
("Input: ALPS - do not mix trackstick and external PS/2 mouse data")

This commit fixes this by passing in the touchpad evdev as dev2 parameter
when calling alps_report_buttons for the pointingstick on alps v2 devices,
so that alps_report_buttons correctly detect that we're already reporting
the button as pressed via the touchpad evdev node, and will also send the
release event there.

Cc: stable@vger.kernel.org # 4.0
Reported-by: Hans de Bruin <jmdebruin@xmsnet.nl>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

To save people some time let's document that we do not want new quirks for
"force-release" keys in the kernel and that they should patch userspace
(udev) instead.
Suggested-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Signed-off-by: Masaki Ota <masaki.ota@jp.alps.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

This change adds support for SS4 touchpad devices as ALPS_PROTO_V8
protocol.  They are real multi-touch devices and can be found in TOSHIBA
Tecra C50.
Signed-off-by: Masaki Ota <masaki.ota@jp.alps.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

In preparation for adding support for SS4 touchpads, let's split
alps_set_abs_params_mt into common, v7-specific, and other protocols
portions.
Signed-off-by: Masaki Ota <masaki.ota@jp.alps.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Sync up with Linux 4.0-rc7 to bring in ALPS changes.

On ASUS TP500LN and X750JN, the touchpad absolute mode is reset each
time set_rate is done.

In order to fix this, we will verify the firmware version, and if it
matches the one in those laptops, the set_rate function is overloaded
with a function elantech_set_rate_restore_reg_07 that performs the
set_rate with the original function, followed by a restore of reg_07
(the register that sets the absolute mode on elantech v4 hardware).

Also the ASUS TP500LN and X750JN firmware version, capabilities, and
button constellation is added to elantech.c

Cc: stable@vger.kernel.org
Reported-and-tested-by: George Moutsopoulos <gmoutso@yahoo.co.uk>
Signed-off-by: Ulrik De Bie <ulrik.debie-os@e2big.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Pull networking fixes from David Miller:

 1) In TCP, don't register an FRTO for cumulatively ACK'd data that was
    previously SACK'd, from Neal Cardwell.

 2) Need to hold RNL mutex in ipv4 multicast code namespace cleanup,
    from Cong WANG.

 3) Similarly we have to hold RNL mutex for fib_rules_unregister(), also
    from Cong WANG.

 4) Revert and rework netns nsid allocation fix, from Nicolas Dichtel.

 5) When we encapsulate for a tunnel device, skb->sk still points to the
    user socket.  So this leads to cases where we retraverse the
    ipv4/ipv6 output path with skb->sk being of some other address
    family (f.e. AF_PACKET).  This can cause things to crash since the
    ipv4 output path is dereferencing an AF_PACKET socket as if it were
    an ipv4 one.

    The short term fix for 'net' and -stable is to elide these socket
    checks once we've entered an encapsulation sequence by testing
    xmit_recursion.

    Longer term we have a better solution wherein we pass the tunnel's
    socket down through the output paths, but that is way too invasive
    for 'net' and -stable.

    From Hannes Frederic Sowa.

 6) l2tp_init() failure path forgets to unregister per-net ops, from
    Cong WANG.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
  net/mlx4_core: Fix error message deprecation for ConnectX-2 cards
  net: dsa: fix filling routing table from OF description
  l2tp: unregister l2tp_net_ops on failure path
  mvneta: dont call mvneta_adjust_link() manually
  ipv6: protect skb->sk accesses from recursive dereference inside the stack
  netns: don't allocate an id for dead netns
  Revert "netns: don't clear nsid too early on removal"
  ip6mr: call del_timer_sync() in ip6mr_free_table()
  net: move fib_rules_unregister() under rtnl lock
  ipv4: take rtnl_lock and mark mrt table as freed on namespace cleanup
  tcp: fix FRTO undo on cumulative ACK of SACKed range
  xen-netfront: transmit fully GSO-sized packets

Commit 1daa4303 ("net/mlx4_core: Deprecate error message at
ConnectX-2 cards startup to debug") did the deprecation only for port 1
of the card. Need to deprecate for port 2 as well.

Fixes: 1daa4303 ("net/mlx4_core: Deprecate error message at ConnectX-2 cards startup to debug")
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

According to description in 'include/net/dsa.h', in cascade switches
configurations where there are more than one interconnected devices,
'rtable' array in 'dsa_chip_data' structure is used to indicate which
port on this switch should be used to send packets to that are destined
for corresponding switch.

However, dsa_of_setup_routing_table() fills 'rtable' with port numbers
of the _target_ switch, but not current one.

This commit removes redundant devicetree parsing and adds needed port
number as a function argument. So dsa_of_setup_routing_table() now just
looks for target switch number by parsing parent of 'link' device node.

To remove possible misunderstandings with the way of determining target
switch number, a corresponding comment was added to the source code and
to the DSA device tree bindings documentation file.

This was tested on a custom board with two Marvell 88E6095 switches with
following corresponding routing tables: { -1, 10 } and { 8, -1 }.
Signed-off-by: Pavel Nakonechny <pavel.nakonechny@skitlab.ru>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Pull input fixes from Dmitry Torokhov:
 "Updates for the input subsystem - two more tweaks for ALPS driver to
  work out kinks after splitting the touchpad, trackstick, and potential
  external PS/2 mouse into separate input devices.

  Changes to support ALPS SS4 devices (protocol V8) will be coming in
  4.1..."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: alps - document stick behavior for protocol V2
  Input: alps - report V2 Dualpoint Stick events via the right evdev node
  Input: alps - report interleaved bare PS/2 packets via dev3

Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

If the "linux,gpio-keymap" DT property is defined, the T19 keys are
configured and the device is setup as a touchpad rather than a touchscreen.
The logic is part of the input device initialization routine but it can be
factored out to its own function to simplify the former.
Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Add support for the new T100 object which replaces the previous T9
multitouch touchscreen object in recent maXTouch devices. T100 provides
improved reporting with selectable auxiliary information, and a type field
for hover/stylus/glove reporting.

The hovering finger support was based on Chung-Yih's work in the ChromiumOS
downstream kernel:

https://chromium-review.googlesource.com/#/c/219280/Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
Acked-by: Yufeng Shen <miletus@chromium.org>
[javier: Factor out T9 and T100 init functions and rework hover support]
Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

mvneta_adjust_link() is a callback for of_phy_connect() and should
not be called directly. The result of calling it directly is as below:
Signed-off-by: David S. Miller <davem@davemloft.net>

We should not consult skb->sk for output decisions in xmit recursion
levels > 0 in the stack. Otherwise local socket settings could influence
the result of e.g. tunnel encapsulation process.

ipv6 does not conform with this in three places:

1) ip6_fragment: we do consult ipv6_npinfo for frag_size

2) sk_mc_loop in ipv6 uses skb->sk and checks if we should
   loop the packet back to the local socket

3) ip6_skb_dst_mtu could query the settings from the user socket and
   force a wrong MTU

Furthermore:
In sk_mc_loop we could potentially land in WARN_ON(1) if we use a
PF_PACKET socket ontop of an IPv6-backed vxlan device.

Reuse xmit_recursion as we are currently only interested in protecting
tunnel devices.

Cc: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

As the comment right before explains, the keyboard state is to be cleared
only if the EC wasn't a wakeup source in the last suspend.

Without this commit, there's an unneeded delay when resuming from suspend
and we also lose the key that was pressed while suspended.
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Reviewed-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

This driver does not use any PCI IDs, don't include the pci_ids.h header.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

When slowly dropping 1, 2 and then 3 fingers on an image sensor touchpad,
we can see that the first finger gets reassigned a new slot while it did
not move. This is due to the kernel tracking algorithm which can not assign
correctly the 3 touches, being out of slots.

Declaring that we support 3 slots allows to actually forward:
slot 0 -> down, slot 1 -> up, slot 2 -> down
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Henrik Rydberg <rydberg@bitmath.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

This reverts commit 09d042a2 ("Revert "Input: synaptics - use dmax in
input_mt_assign_slots"")

Now that balanced slots assignments seem to be fixed, let's re-enable the
use in synaptics.c and wait for users to complain if there are still
problems.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Henrik Rydberg <rydberg@bitmath.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

The recent inclusion of a deassignment cost in the slot assignment
algorithm did not properly account for the corner cases where the
solutions are overcovered. This change makes sure the resulting
assignment is unique, allocating new slots when necessary.
Signed-off-by: Henrik Rydberg <rydberg@bitmath.org>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Document that protocol V2 uses standard (bare) PS/2 mouse packets for the
DualPoint stick.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-By: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

On V2 devices the DualPoint Stick reports bare packets, these should be
reported via the "AlpsPS/2 ALPS DualPoint Stick" dev2 evdev node, which also
has the INPUT_PROP_POINTING_STICK propbit set.

Note that since there is no way to distinguish these packets from an external
PS/2 mouse (insofar as these laptops have an external PS/2 port) this means
that we will be reporting PS/2 mouse events via this evdev node too, as we've
been doing in kernel 3.19 and older.

This has been tested on a Dell Latitude D620 and a Dell Latitude E6400,
which both have a V2 touchpad + a DualPoint Stick which reports bare packets.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Bare packets should be reported via the same evdev device independent on
whether they are detected on the beginning of a packet or in the middle
of a packet.

This has been tested on a Dell Latitude E6400, where the DualPoint Stick
reports bare packets, which get reported via dev3 when the touchpad is
idle, and via dev2 when the touchpad and stick are used simultaneously.

This commit fixes this inconsistency by always reporting bare packets via
dev3. Note that since the come from a DualPoint Stick they really should be
reported via dev2, this gets fixed in a later commit.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Pull USB fixes from Greg KH:
 "Here are some small USB fixes and new device ids for 4.0-rc6.  Nothing
  major, some xhci fixes for reported problems, and some usb-serial
  device ids.

  All have been in linux-next for a while"

* tag 'usb-4.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  USB: ftdi_sio: Use jtag quirk for SNAP Connect E10
  usb: isp1760: fix spin unlock in the error path of isp1760_udc_start
  usb: xhci: apply XHCI_AVOID_BEI quirk to all Intel xHCI controllers
  usb: xhci: handle Config Error Change (CEC) in xhci driver
  USB: keyspan_pda: add new device id
  USB: ftdi_sio: Added custom PID for Synapse Wireless product

Pull staging driver fixes from Greg KH:
 "Here are some staging driver fixes, well, really all just IIO driver
  fixes, for 4.0-rc6.  They fix issues that have been reported with
  these drivers.

  All of these patches have been in linux-next for a while"

* tag 'staging-4.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  iio: imu: Use iio_trigger_get for indio_dev->trig assignment
  iio: adc: vf610: use ADC clock within specification
  iio/adc/cc10001_adc.c: Fix !HAS_IOMEM build
  iio: core: Fix double free.
  iio:inv-mpu6050: Fix inconsistency for the scale channel
  staging: iio: dummy: Fix undefined symbol build error
  iio: inv_mpu6050: Clear timestamps fifo while resetting hardware fifo
  staging: iio: hmc5843: Set iio name property in sysfs
  iio: bmc150: change sampling frequency
  iio: fix drivers that check buffer->scan_mask

Pull tty/serial fixes from Greg KH:
 "Here are 3 serial driver fixes for 4.0-rc6.  They fix some reported
  issues with the samsung and fsl_lpuart drivers.

  All have been in linux-next for a while"

* tag 'tty-4.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  tty: serial: fsl_lpuart: clear receive flag on FIFO flush
  tty: serial: fsl_lpuart: specify transmit FIFO size
  serial: samsung: Clear operation mode on UART shutdown

All systems using the TC3589x multifunction expander uses
devicetree, so don't clutter the place with a lot of
and assume it is there.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

This driver can only get its platform data from the device tree, and all
platforms using it do that. Localize the platform data for the keypad. A
later patch will enforce the device tree / OF dependence.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Pull input subsystem fixes from Dmitry Torokhov:
 "A fix for ALPS driver for issue introduced in the latest update and a
  tweak for yet another Lenovo box in Synaptics.

  There will be more ALPS tweaks coming.."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: define INPUT_PROP_ACCELEROMETER behavior
  Input: synaptics - fix min-max quirk value for E440
  Input: synaptics - add quirk for Thinkpad E440
  Input: ALPS - fix max coordinates for v5 and v7 protocols
  Input: add MT_TOOL_PALM

Pull block layer fix from Jens Axboe:
 "Just one patch in this pull request, fixing a regression caused by a
  'mathematically correct' change to lcm()"

* 'for-linus' of git://git.kernel.dk/linux-block:
  block: fix blk_stack_limits() regression due to lcm() change

Pull x86 fixes from Ingo Molnar:
 "Misc fixes: a SYSRET single-stepping fix, a dmi-scan robustization
  fix, a reboot quirk and a kgdb fixlet"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  kgdb/x86: Fix reporting of 'si' in kgdb on x86_64
  x86/asm/entry/64: Disable opportunistic SYSRET if regs->flags has TF set
  x86/reboot: Add ASRock Q1900DC-ITX mainboard reboot quirk
  MAINTAINERS: Change the x86 microcode loader maintainer
  firmware: dmi_scan: Prevent dmi_num integer overflow

Pull perf fixes from Ingo Molnar:
 "Two x86 Intel PMU constraint handling fixes"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/intel: Fix Haswell CYCLE_ACTIVITY.* counter constraints
  perf/x86/intel: Filter branches for PEBS event

Pull devicetree fix from Grant Likely:
 "Simple bugfix for bad device tree data on the PA-Semi platform"

* tag 'devicetree-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux:
  drivers/of: Add empty ranges quirk for PA-Semi

Pull CIFS fixes from Steve French:
 "A set of small cifs fixes fixing a memory leak, kernel oops, and
  infinite loop (and some spotted by Coverity)"

* 'for-next' of git://git.samba.org/sfrench/cifs-2.6:
  Fix warning
  Fix another dereference before null check warning
  CIFS: session servername can't be null
  Fix warning on impossible comparison
  Fix coverity warning
  Fix dereference before null check warning
  Don't ignore errors on encrypting password in SMBTcon
  Fix warning on uninitialized buftype
  cifs: potential memory leaks when parsing mnt opts
  cifs: fix use-after-free bug in find_writable_file
  cifs: smb2_clone_range() - exit on unhandled error

First, let's explain the problem.
Suppose you have an ipip interface that stands in the netns foo and its link
part in the netns bar (so the netns bar has an nsid into the netns foo).
Now, you remove the netns bar:
 - the bar nsid into the netns foo is removed
 - the netns exit method of ipip is called, thus our ipip iface is removed:
   => a netlink message is built in the netns foo to advertise this deletion
   => this netlink message requests an nsid for bar, thus a new nsid is
      allocated for bar and never removed.

This patch adds a check in peernet2id() so that an id cannot be allocated for
a netns which is currently destroyed.
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>