We currently require that MCDI request and response lengths are
multiples of 4 bytes, because we will copy dwords in and out of shared
memory and we want to be sure we won't read or write out of bounds.
But all we really need to know is that there is sufficient padding for
that.  Also, we should ensure that buffers are dword-aligned, as on
some architectures misaligned access will result in data corruption or
a crash.

Change the buffer type to array-of-efx_dword_t and remove the
requirement that the lengths are multiples of 4.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

A few functions are using heap buffers; change them to use stack
buffers as we really don't need to resort to the heap for a 252
byte buffer in process context.

MC_CMD_MEMCPY is quite weird in that it can use inline data placed in
the request buffer after the array of records.  Thus there are two
variable-length arrays and we can't use the normal accessors for
the second.  So we have to use _MCDI_PTR() in efx_sriov_memcpy().
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

The MCDI version 2 protocol supports larger payloads, but will
not be implemented on Siena.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

We need to access arrays of 16-bit words and 32-bit dwords in MCDI
buffers based on the MCDI protocol definitions.

We should also be able to read and write fields within structures,
without specifying an array index each time.  So add MCDI_FIELD()
and make MCDI_ARRAY_FIELD() use it.  Also add MCDI_SET_FIELD().

Split MCDI_ARRAY_PTR() into MCDI_ARRAY_STRUCT_PTR() and
_MCDI_ARRAY_PTR(), which are currently identical but will diverge in
later changes.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

Add _MCDI_DWORD() which yields an lvalue for the given dword field
and change MCDI_DWORD(), MCDI_SET_DWORD() and MCDI_QWORD() to use it.

Fold the rather trivial MCDI_PTR2() into MCDI_PTR() and _MCDI_DWORD().

Remove MCDI_SET_DWORD2() and MCDI_QWORD2().  MCDI_DWORD2() should also
go, but it still has one user which we'll get rid of later.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

MCDI_DECLARE_BUF declares a variable as an MCDI buffer of the
requested length, adding any necessary padding.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

In particular, fold in the whole of falcon_xmac.c.

Drop some entirely unused definitions.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

This needs to be done before we separate MCDI from siena_nic_data.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

Merge sfc fixes destined for 3.11 so we can avoid conflicts with
development for 3.12+.

commit 385904f8 ('sfc: Don't use
efx_filter_{build,hash,increment}() for default MAC filters') used the
wrong name to find the index of default RX MAC filters at insertion/
update time.  This could result in memory corruption and would in any
case silently fail to update the filter.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

Pravin B Shelar says:

====================
openvswitch: VXLAN tunneling.

First four vxlan patches extends vxlan so that openvswitch
can share vxlan recv code. Rest of patches refactors vxlan
data plane so that ovs can share that code with vxlan module.
Last patch adds vxlan-vport to openvswitch.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Following patch adds vxlan vport type for openvswitch using
vxlan api. So now there is vxlan dependency for openvswitch.

CC: Jesse Gross <jesse@nicira.com>
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Jesse Gross <jesse@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Following patch allows transmit side vlan offload for vxlan
devices.
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Rather than having static headroom calculation, adjust headroom
according to target device.
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Following patch allows more code sharing between vxlan and ovs-vxlan.
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Following patch adds data field to vxlan socket and export
vxlan handler api.
vh->data is required to store private data per vxlan handler.
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Once we have ovs-vxlan functionality, one UDP port can be assigned
to kernel-vxlan or ovs-vxlan port.  Therefore following patch adds
vxlan demux functionality, so that vxlan or ovs module can
register for particular port.
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Use iptunnel_pull_header() for better code sharing.
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Restructure vxlan-socket management APIs so that it can be
shared between vxlan and ovs modules.
This patch does not change any functionality.
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
v6-v7:
 - get rid of zero refcnt vs from hashtable.
Signed-off-by: David S. Miller <davem@davemloft.net>

Add comments.
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Split some parts of code into another function to simplify
tx_bottom(). Use while loop to replace the goto loop.
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Move some declearation of variables in rx_bottom().
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

- Use r8152_get_tx_agg for getting tx agg list
- Replace submit rx with goto submit
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Replace lockflags with flags.
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Change the type of contex of tx_agg and rx_agg from void * to
staruc r8152 *.
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Remove memset(tp, 0, sizeof(*tp));
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Pull clock controller fixes from Michael Turquette:
 "Two small fixes for the Zynq clock controller introduced in 3.11-rc1
  and another Exynos clock patch which fixes a regression that prevents
  the video pipeline from functioning on that platform"

* tag 'clk-fixes-for-linus' of git://git.linaro.org/people/mturquette/linux:
  clk: exynos4: Add CLK_GET_RATE_NOCACHE flag for the Exynos4x12 ISP clocks
  clk/zynq/clkc: Add CLK_SET_RATE_PARENT flag to ethernet muxes
  clk/zynq/clkc: Add dedicated spinlock for the SWDT

Pull power management fix from Rafael Wysocki:
 "The removal of delayed_work_pending() checks from kernel/power/qos.c
  done in 3.9 introduced a deadlock in pm_qos_work_fn().

  Fix from Stephen Boyd"

* tag 'pm-3.11-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PM / QoS: Fix workqueue deadlock when using pm_qos_update_request_timeout()

Pull sound fixes from Takashi Iwai:
 "This batch contains a few USB audio fixes, a couple of HD-audio
  quirks, various small ASoC driver fixes in addition to an ASoC core
  fix that may lead to memory corruption.

  Unfortunately slightly more volume than the previous pull request, but
  all are reasonable regression fixes"

* tag 'sound-3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda - Add a fixup for Gateway LT27
  ASoC: tegra: fix Tegra30 I2S capture parameter setup
  ALSA: usb-audio: Fix invalid volume resolution for Logitech HD Webcam C525
  ALSA: hda - Fix missing mute controls for CX5051
  ALSA: usb-audio: fix automatic Roland/Yamaha MIDI detection
  ALSA: 6fire: make buffers DMA-able (midi)
  ALSA: 6fire: make buffers DMA-able (pcm)
  ALSA: hda - Add pinfix for LG LW25 laptop
  ASoC: cs42l52: Add new TLV for Beep Volume
  ASoC: cs42l52: Reorder Min/Max and update to SX_TLV for Beep Volume
  ASoC: dapm: Fix empty list check in dapm_new_mux()
  ASoC: sgtl5000: fix buggy 'Capture Attenuate Switch' control
  ASoC: sgtl5000: prevent playback to be muted when terminating concurrent capture

Pull USB fixes from Greg KH:
 "Here are some small USB fixes for 3.11-rc6 that have accumulated.

  Nothing huge, a EHCI fix that solves a much-reported audio USB
  problem, some usb-serial driver endian fixes and other minor fixes, a
  wireless USB oops fix, and two new quirks"

* tag 'usb-3.11-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  USB: keyspan: fix null-deref at disconnect and release
  USB: mos7720: fix broken control requests
  usb: add two quirky touchscreen
  USB: ti_usb_3410_5052: fix big-endian firmware handling
  USB: adutux: fix big-endian device-type reporting
  USB: usbtmc: fix big-endian probe of Rigol devices
  USB: mos7840: fix big-endian probe
  USB-Serial: Fix error handling of usb_wwan
  wusbcore: fix kernel panic when disconnecting a wireless USB->serial device
  USB: EHCI: accept very late isochronous URBs

Pull networking fixes from David Miller:

 1) Fix SKB leak in 8139cp, from Dave Jones.

 2) Fix use of *_PAGES interfaces with mlx5 firmware, from Moshe Lazar.

 3) RCU conversion of macvtap introduced two races, fixes by Eric
    Dumazet

 4) Synchronize statistic flows in bnx2x driver to prevent corruption,
    from Dmitry Kravkov

 5) Undo optimization in IP tunneling, we were using the inner IP header
    in some cases to inherit the IP ID, but that isn't correct in some
    circumstances.  From Pravin B Shelar

 6) Use correct struct size when parsing netlink attributes in
    rtnl_bridge_getlink().  From Asbjoern Sloth Toennesen

 7) Length verifications in tun_get_user() are bogus, from Weiping Pan
    and Dan Carpenter

 8) Fix bad merge resolution during 3.11 networking development in
    openvswitch, albeit a harmless one which added some unreachable
    code.  From Jesse Gross

 9) Wrong size used in flexible array allocation in openvswitch, from
    Pravin B Shelar

10) Clear out firmware capability flags the be2net driver isn't ready to
    handle yet, from Sarveshwar Bandi

11) Revert DMA mapping error checking addition to cxgb3 driver, it's
    buggy.  From Alexey Kardashevskiy

12) Fix regression in packet scheduler rate limiting when working with a
    link layer of ATM.  From Jesper Dangaard Brouer

13) Fix several errors in TCP Cubic congestion control, in particular
    overflow errors in timestamp calculations.  From Eric Dumazet and
    Van Jacobson

14) In ipv6 routing lookups, we need to backtrack if subtree traversal
    don't result in a match.  From Hannes Frederic Sowa

15) ipgre_header() returns incorrect packet offset.  Fix from Timo Teräs

16) Get "low latency" out of the new MIB counter names.  From Eliezer
    Tamir

17) State check in ndo_dflt_fdb_del() is inverted, from Sridhar
    Samudrala

18) Handle TCP Fast Open properly in netfilter conntrack, from Yuchung
    Cheng

19) Wrong memcpy length in pcan_usb driver, from Stephane Grosjean

20) Fix dealock in TIPC, from Wang Weidong and Ding Tianhong

21) call_rcu() call to destroy SCTP transport is done too early and
    might result in an oops.  From Daniel Borkmann

22) Fix races in genetlink family dumps, from Johannes Berg

23) Flags passed into macvlan by the user need to be validated properly,
    from Michael S Tsirkin

24) Fix skge build on 32-bit, from Stephen Hemminger

25) Handle malformed TCP headers properly in xt_TCPMSS, from Pablo Neira
    Ayuso

26) Fix handling of stacked vlans in vlan_dev_real_dev(), from Nikolay
    Aleksandrov

27) Eliminate MTU calculation overflows in esp{4,6}, from Daniel
    Borkmann

28) neigh_parms need to be setup before calling the ->ndo_neigh_setup()
    method.  From Veaceslav Falico

29) Kill out-of-bounds prefetch in fib_trie, from Eric Dumazet

30) Don't dereference MLD query message if the length isn't value in the
    bridge multicast code, from Linus Lüssing

31) Fix VXLAN IGMP join regression due to an inverted check, from Cong
    Wang

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (70 commits)
  net/mlx5_core: Support MANAGE_PAGES and QUERY_PAGES firmware command changes
  tun: signedness bug in tun_get_user()
  qlcnic: Fix diagnostic interrupt test for 83xx adapters
  qlcnic: Fix beacon state return status handling
  qlcnic: Fix set driver version command
  net: tg3: fix NULL pointer dereference in tg3_io_error_detected and tg3_io_slot_reset
  net_sched: restore "linklayer atm" handling
  drivers/net/ethernet/via/via-velocity.c: update napi implementation
  Revert "cxgb3: Check and handle the dma mapping errors"
  be2net: Clear any capability flags that driver is not interested in.
  openvswitch: Reset tunnel key between input and output.
  openvswitch: Use correct type while allocating flex array.
  openvswitch: Fix bad merge resolution.
  tun: compare with 0 instead of total_len
  rtnetlink: rtnl_bridge_getlink: Call nlmsg_find_attr() with ifinfomsg header
  ethernet/arc/arc_emac - fix NAPI "work > weight" warning
  ip_tunnel: Do not use inner ip-header-id for tunnel ip-header-id.
  bnx2x: prevent crash in shutdown flow with CNIC
  bnx2x: fix PTE write access error
  bnx2x: fix memory leak in VF
  ...

Ben Tebulin reported:

 "Since v3.7.2 on two independent machines a very specific Git
  repository fails in 9/10 cases on git-fsck due to an SHA1/memory
  failures.  This only occurs on a very specific repository and can be
  reproduced stably on two independent laptops.  Git mailing list ran
  out of ideas and for me this looks like some very exotic kernel issue"

and bisected the failure to the backport of commit 53a59fc6 ("mm:
limit mmu_gather batching to fix soft lockups on !CONFIG_PREEMPT").

That commit itself is not actually buggy, but what it does is to make it
much more likely to hit the partial TLB invalidation case, since it
introduces a new case in tlb_next_batch() that previously only ever
happened when running out of memory.

The real bug is that the TLB gather virtual memory range setup is subtly
buggered.  It was introduced in commit 597e1c35 ("mm/mmu_gather:
enable tlb flush range in generic mmu_gather"), and the range handling
was already fixed at least once in commit e6c495a9 ("mm: fix the TLB
range flushed when __tlb_remove_page() runs out of slots"), but that fix
was not complete.

The problem with the TLB gather virtual address range is that it isn't
set up by the initial tlb_gather_mmu() initialization (which didn't get
the TLB range information), but it is set up ad-hoc later by the
functions that actually flush the TLB.  And so any such case that forgot
to update the TLB range entries would potentially miss TLB invalidates.

Rather than try to figure out exactly which particular ad-hoc range
setup was missing (I personally suspect it's the hugetlb case in
zap_huge_pmd(), which didn't have the same logic as zap_pte_range()
did), this patch just gets rid of the problem at the source: make the
TLB range information available to tlb_gather_mmu(), and initialize it
when initializing all the other tlb gather fields.

This makes the patch larger, but conceptually much simpler.  And the end
result is much more understandable; even if you want to play games with
partial ranges when invalidating the TLB contents in chunks, now the
range information is always there, and anybody who doesn't want to
bother with it won't introduce subtle bugs.

Ben verified that this fixes his problem.
Reported-bisected-and-tested-by: Ben Tebulin <tebulin@googlemail.com>
Build-testing-by: Stephen Rothwell <sfr@canb.auug.org.au>
Build-testing-by: Richard Weinberger <richard.weinberger@gmail.com>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Gateway LT27 needs a fixup for the inverted digital mic.
Reported-by: "Nathanael D. Noblet" <nathanael@gnat.ca>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Following patch stores struct netlink_callback in netlink_sock
to avoid allocating and freeing it on every netlink dump msg.
Only one dump operation is allowed for a given socket at a time
therefore we can safely convert cb pointer to cb struct inside
netlink_sock.
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

In the previous QUERY_PAGES command version we used one command to get the
required amount of boot, init and post init pages.  The new version uses the
op_mod field to specify whether the query is for the required amount of boot,
init or post init pages. In addition the output field size for the required
amount of pages increased from 16 to 32 bits.

In MANAGE_PAGES command the input_num_entries and output_num_entries fields
sizes changed from 16 to 32 bits and the PAS tables offset changed to 0x10.

In the pages request event the num_pages field also changed to 32 bits.

In the HCA-capabilities-layout the size and location of max_qp_mcg field has
been changed to support 24 bits.

This patch isn't compatible with firmware versions < 5; however, it  turns out that the
first GA firmware we will publish will not support previous versions so this should be OK.
Signed-off-by: Moshe Lazer <moshel@mellanox.com>
Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The recent fix d9bf5f13 "tun: compare with 0 instead of total_len" is
not totally correct.  Because "len" and "sizeof()" are size_t type, that
means they are never less than zero.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>