This commit adds debug messages for the generic mv88e6xxx read and write
routines. The output is similar to this:

    mdio-gpio mdio-gpio.0: <- addr: 0x1b reg: 0x05 val: 0x4000
    mdio-gpio mdio-gpio.0: -> addr: 0x1b reg: 0x07 val: 0x3113
    mdio-gpio mdio-gpio.0: -> addr: 0x1b reg: 0x08 val: 0x0330
    mdio-gpio mdio-gpio.0: -> addr: 0x1b reg: 0x09 val: 0x0000

This is convenient to dynamically debug operations through debugfs with:

    echo file mv88e6xxx.c +p > <debugfs>/dynamic_debug/control
Signed-off-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Fix compilation warning:
drivers/net/ethernet/cadence/macb.c:2415:12: warning: 'macb_suspend'
defined but not used [-Wunused-function]
 static int macb_suspend(struct device *dev)
drivers/net/ethernet/cadence/macb.c:2432:12: warning: 'macb_resume'
defined but not used [-Wunused-function]
 static int macb_resume(struct device *dev)

when CONFIG_PM=y, CONFIG_PM_SLEEP=n are used.
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The driver is trying to acquire clocks which maybe
are not available yet. Allow the driver to request
deffered probe by providing a probe function and
registering it with module_platform_driver. [1]
This patch is based on 3.19-rc5.

[1] https://lkml.org/lkml/2013/9/23/118Signed-off-by: NNicolae Rosia <nicolae.rosia@certsign.ro>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The flows are hashed on the sending node address, which allows us
to spread out the TIPC link processing to RPS enabled cores. There
is no point to include the destination address in the hash as that
will always be the same for all inbound links. We have experimented
with a 3-tuple hash over [srcnode, sport, dport], but this showed to
give slightly lower performance because of increased lock contention
when the same link was handled by multiple cores.
Signed-off-by: NYing Xue <ying.xue@windriver.com>
Signed-off-by: NErik Hugne <erik.hugne@ericsson.com>
Reviewed-by: NJon Maloy <jon.maloy@ericsson.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

If a large number of namespaces is spawned on a node and TIPC is
enabled in each of these, the excessive printk tracing of network
events will cause the system to grind down to a near halt.
The traces are still of debug value, so instead of removing them
completely we fix it by changing the link state and node availability
logging debug traces.
Signed-off-by: NErik Hugne <erik.hugne@ericsson.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Kalle Valo says:

====================
pull-request: wireless-drivers-next 2015-01-22

now a bigger pull request for net-next. Rafal found a UTF-8 bug in
patchwork[1] and because of that two commits (d0c102f7 and
d0f66df5) have his name corrupted:
Acked-by: NRafa? Mi?ecki <zajec5@gmail.com>

Somehow I failed to spot that when I commited the patches. As rebasing
public git trees is bad, I thought we can live with these and decided
not to rebase. But I'll pay close attention to this in the future to
make sure that it won't happen again. Also we requested an update to
patchwork.kernel.org, the latest patchwork doesn't seem to have this
bug.

Also please note this pull request also adds one DT binding doc, but
this was reviewed in the device tree list:

 .../bindings/net/wireless/qcom,ath10k.txt          |   30 +

Please let me know if you have any issues.

[1] https://lists.ozlabs.org/pipermail/patchwork/2015-January/001261.html
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Similarly as in cls_bpf, also this code needs to reject mismatches.

Reference: http://article.gmane.org/gmane.linux.network/347406
Fixes: d23b8ad8 ("tc: add BPF based action")
Signed-off-by: NDaniel Borkmann <dborkman@redhat.com>
Acked-by: NJiri Pirko <jiri@resnulli.us>
Acked-by: NAlexei Starovoitov <ast@plumgrid.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

As soon as we've found a matching handle in basic_get(), we can
return it. There's no need to continue walking until the end of
a filter chain, since they are unique anyway.
Signed-off-by: NDaniel Borkmann <dborkman@redhat.com>
Acked-by: NJiri Pirko <jiri@resnulli.us>
Cc: Thomas Graf <tgraf@suug.ch>
Acked-by: NThomas Graf <tgraf@suug.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This property define the AXI bug lenth.
Signed-off-by: NSonic Zhang <sonic.zhang@analog.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Clear the TX COE bit when force_thresh_dma_mode is set even hardware
dma capability says support.

Tested on BF609.
Signed-off-by: NSonic Zhang <sonic.zhang@analog.com>
Acked-by: NGiuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

stmmac: if force_thresh_dma_mode is set, pass tc to both txmode and rxmode in tx_hard_error_bump_tc interrupt

Dont' pass SF_DMA_MODE to rxmode in this case.
Signed-off-by: NSonic Zhang <sonic.zhang@analog.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Joe Stringer says:

====================
openvswitch: Introduce 128-bit unique flow identifiers.

This series extends the openvswitch datapath interface for flow commands to use
128-bit unique identifiers as an alternative to the netlink-formatted flow key.
This significantly reduces the cost of assembling messages between the kernel
and userspace, in particular improving Open vSwitch revalidation performance by
40% or more.

v14:
- Perform lookup using unmasked key in legacy case.
- Fix minor checkpatch.pl style violations.

v13:
- Embed sw_flow_id in sw_flow to save memory allocation in UFID case.
- Malloc unmasked key for id in non-UFID case.
- Fix bug where non-UFID case could double-serialize keys.

v12:
- Userspace patches fully merged into Open vSwitch master
- New minor refactor patches (2,3,4)
- Merge unmasked_key, ufid representation of flow identifier in sw_flow
- Improve memory allocation sizes when serializing ufid
- Handle corner case where a flow_new is requested with a flow that has an
  identical ufid as an existing flow, but a different flow key
- Limit UFID to between 1-16 octets inclusive.
- Add various helper functions to improve readibility

v11:
- Pushed most of the prerequisite patches for this series to OVS master.
- Split out openvswitch.h interface changes from datapath implementation
- Datapath implementation to be reviewed on net-next, separately

v10:
- New patch allowing datapath to serialize masked keys
- Simplify datapath interface by accepting UFID or flow_key, but not both
- Flows set up with UFID must be queried/deleted using UFID
- Reduce sw_flow memory usage for UFID
- Don't periodically rehash UFID table in linux datapath
- Remove kernel_only UFID in linux datapath

v9:
- No kernel changes

v8:
- Rename UID -> UFID
- Fix null dereference in datapath when paired with older userspace
- All patches are reviewed/acked except datapath changes.

v7:
- Remove OVS_DP_F_INDEX_BY_UID
- Rework datapath UID serialization for variable length UIDs

v6:
- Reduce netlink conversions for all datapaths
- Various bugfixes

v5:
- Various bugfixes
- Improve logging

v4:
- Datapath memory leak fixes
- Enable UID-based terse dumping and deleting by default
- Various fixes

RFCv3:
- Add datapath implementation
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Previously, flows were manipulated by userspace specifying a full,
unmasked flow key. This adds significant burden onto flow
serialization/deserialization, particularly when dumping flows.

This patch adds an alternative way to refer to flows using a
variable-length "unique flow identifier" (UFID). At flow setup time,
userspace may specify a UFID for a flow, which is stored with the flow
and inserted into a separate table for lookup, in addition to the
standard flow table. Flows created using a UFID must be fetched or
deleted using the UFID.

All flow dump operations may now be made more terse with OVS_UFID_F_*
flags. For example, the OVS_UFID_F_OMIT_KEY flag allows responses to
omit the flow key from a datapath operation if the flow has a
corresponding UFID. This significantly reduces the time spent assembling
and transacting netlink messages. With all OVS_UFID_F_OMIT_* flags
enabled, the datapath only returns the UFID and statistics for each flow
during flow dump, increasing ovs-vswitchd revalidator performance by 40%
or more.
Signed-off-by: NJoe Stringer <joestringer@nicira.com>
Acked-by: NPravin B Shelar <pshelar@nicira.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The first user will be the next patch.
Signed-off-by: NJoe Stringer <joestringer@nicira.com>
Acked-by: NPravin B Shelar <pshelar@nicira.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

These minor tidyups make a future patch a little tidier.
Signed-off-by: NJoe Stringer <joestringer@nicira.com>
Acked-by: NPravin B Shelar <pshelar@nicira.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Rework so that ovs_flow_tbl_insert() calls flow_{key,mask}_insert().
This tidies up a future patch.
Signed-off-by: NJoe Stringer <joestringer@nicira.com>
Acked-by: NPravin B Shelar <pshelar@nicira.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Refactor the ovs_nla_fill_match() function into separate netlink
serialization functions ovs_nla_put_{unmasked_key,mask}(). Modify
ovs_nla_put_flow() to handle attribute nesting and expose the 'is_mask'
parameter - all callers need to nest the flow, and callers have better
knowledge about whether it is serializing a mask or not.
Signed-off-by: NJoe Stringer <joestringer@nicira.com>
Acked-by: NPravin B Shelar <pshelar@nicira.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Merge tag 'linux-can-next-for-3.20-20150121' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next

Marc Kleine-Budde says:

====================
pull-request: can-next 2015-21-01

this is a pull request of 4 patches for net-next/master.

Andri Yngvason contributes one patch to further consolidate the CAN
state change handling. The next patch is by kbuild test robot/Fengguang
Wu which fixes a coccinelle warning in the CAN infrastructure. The two
last patches are by me, they remove a unused variable from the flexcan
and at91_can driver.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Sergei Shtylyov says:

====================
sh_eth: massage PM code

   Here's a set of 2 patches against DaveM's 'net-next.git' repo. We're adding
the support for suspend/hibernation as well as somewhat changing the existing
code. There are still MDIO-related issue with suspend (kernel exception), we've
been working on it and shall address it with a separate patch...
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add sh_eth_{suspend|resume}() implementing {suspend|resume|freeze|thaw|poweroff|
restore}() PM methods to make it possible to restore from hibernation not only
in Linux  but also in e.g. U-Boot and  to have more determined state on resume/
restore.
Signed-off-by: NMikhail Ulyanov <mikhail.ulyanov@cogentembedded.com>
[Sergei: moved sh_eth_{suspend|resume}() before sh_eth_runtime_nop(), enclosed
them with #ifdef CONFIG_PM_SLEEP, reordered the local variables, got rid of
*goto* and label, reordered macro invocations, renamed, modified the changelog.]
Signed-off-by: NSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Use SET_RUNTIME_PM_OPS() macro to initialize the runtime PM method pointers in
the 'struct dev_pm_ops'.
Signed-off-by: NMikhail Ulyanov <mikhail.ulyanov@cogentembedded.com>
[Sergei: renamed, added the changelog.]
Signed-off-by: NSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add support for Byte Queue Limits to the STMicro MAC driver.

Tested on a Amlogic S802 quad Cortex-A9 board, where the use of BQL
decreases the latency of a high priority ping from ~12ms to ~1ms when
the 100Mbit link is saturated by 20 TCP streams.
Signed-off-by: NBeniamino Galvani <b.galvani@gmail.com>
Reviewed-by: NEric Dumazet <edumazet@google.com>
Acked-by: NGiuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

commit b5a02f50 ("cxgb4 : Update ipv6 address handling api") introduced
a regression where unregister cxgb4_inet6addr_notifier wasn't getting called
during module_exit.
Signed-off-by: NHariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

As removals can occur during resizes, entries may be referred to from
both tbl and future_tbl when the removal is requested. Therefore
rhashtable_remove() must unlink the entry in both tables if this is
the case. The existing code did search both tables but stopped when it
hit the first match.

Failing to unlink in both tables resulted in use after free.

Fixes: 97defe1e ("rhashtable: Per bucket locks & deferred expansion/shrinking")
Reported-by: NYing Xue <ying.xue@windriver.com>
Signed-off-by: NThomas Graf <tgraf@suug.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

IPv6 TCP sockets store in np->pktoptions skbs, and use skb_set_owner_r()
to charge the skb to socket.

It means that destructor must be called while socket is locked.

Therefore, we cannot use skb_get() or atomic_inc(&skb->users)
to protect ourselves : kfree_skb() might race with other users
manipulating sk->sk_forward_alloc

Fix this race by holding socket lock for the duration of
ip6_datagram_recv_ctl()
Signed-off-by: NEric Dumazet <edumazet@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

"next" is not updated, causing an endless loop for buckets with more than
one element.

Fixes: 88d6ed15 ("rhashtable: Convert bucket iterators to take table and index")
Signed-off-by: NPatrick McHardy <kaber@trash.net>
Acked-by: NThomas Graf <tgraf@suug.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

spin_event_timeout() is PPC dependent, use an arch independent
equivalent instead.
Signed-off-by: NShaohui Xie <Shaohui.Xie@freescale.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Use ioread32be() & iowrite32be() instead.
Signed-off-by: NShaohui Xie <Shaohui.Xie@freescale.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

In commit 5a7baa78 ("bonding: Advertize vxlan offload features when
supported"), Or Gerlitz added support conditional vxlan offload.

In this patch I also add support for all kind of tunnels,
but we allow a bonding device to not require segmentation,
as it is always better to make this segmentation at the very last stage,
if a particular slave device requires it.

Tested:

 Setup a GRE tunnel,
 on a physical NIC not having tx-gre-segmentation.
 Results on bnx2x are even better, as we no longer have to segment
 in software.

ethtool -K bond0 tx-gre-segmentation off

super_netperf 50 --google-pacing-rate 30000000 -H 10.7.8.152 -l 15
7538.32

ethtool -K bond0 tx-gre-segmentation on

super_netperf 50 --google-pacing-rate 30000000 -H 10.7.8.152 -l 15
10200.5
Signed-off-by: NEric Dumazet <edumazet@google.com>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Static checkers complain that we should maybe set "ret" before we do the
"goto out;".  They interpret the NULL return from br_port_get_rtnl() as
a failure and forgetting to set the error code is a common bug in this
situation.

The code is confusing but it's actually correct.  We are returning zero
deliberately.  Let's re-write it a bit to be more clear.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Acked-by: NStephen Hemminger <stephen@networkplumber.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Florian Fainelli says:

====================
net: phy and dsa random fixes/cleanups

These two patches were already present as part of my attempt to make
DSA modules work properly, these are the only two "valid" patches at
this point which should not need any further rework.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Factor the interrupt disabling in a function: bcm_sf2_intr_disable()
since we are doing the same thing in the setup and suspend paths.
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

fixed_phy_set_link_update() contains an early check against a NULL
callback pointer, which basically prevents us from removing any
previous callback we may have set. The users of the fp->link_update
callback deal with a NULL callback just fine, so we really want to allow
"removing" a link_update callback to avoid dangling callback pointers
during e.g: module removal.
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The kernel forcefully applies MTU values received in router
advertisements provided the new MTU is less than the current. This
behavior is undesirable when the user space is managing the MTU. Instead
a sysctl flag 'accept_ra_mtu' is introduced such that the user space
can control whether or not RA provided MTU updates should be applied. The
default behavior is unchanged; user space must explicitly set this flag
to 0 for RA MTUs to be ignored.
Signed-off-by: NHarout Hedeshian <harouth@codeaurora.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Alexander Duyck says:

====================
Fixes and improvements for recent fib_trie updates

While performing testing and prepping the next round of patches I found a
few minor issues and improvements that could be made.

These changes should help to reduce the overall code size and improve the
performance slighlty as I noticed a 20ns or so improvement in my worst-case
testing which will likely only result in a 1ns difference with a standard
sized trie.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

While doing further work on the fib_trie I noted a few items.

First I was using calls that were far more complicated than they needed to
be for determining when to push/pull the suffix length.  I have updated the
code to reflect the simplier logic.

The second issue is that I realised we weren't necessarily handling the
case of a leaf_info struct surviving a flush.  I have updated the logic so
that now we will call pull_suffix in the event of having a leaf info value
left in the leaf after flushing it.
Signed-off-by: NAlexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The function fib_find_alias is only accessed by functions in fib_trie.c as
such it makes sense to relocate it and cast it as static so that the
compiler can take advantage of optimizations it can do to it as a local
function.
Signed-off-by: NAlexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

It doesn't make much sense to count the pointers ourselves when
empty_children already has a count for the number of NULL pointers stored
in the tnode.  As such save ourselves the cycles and just use
empty_children.
Signed-off-by: NAlexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch really does two things.

First it pulls the logic for determining if we should collapse one node out
of the tree and the actual code doing the collapse into a separate pair of
functions.  This helps to make the changes to these areas more readable.

Second it encodes the upper 32b of the empty_children value onto the
full_children value in the case of bits == KEYLENGTH.  By doing this we are
able to handle the case of a 32b node where empty_children would appear to
be 0 when it was actually 1ul << 32.
Signed-off-by: NAlexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This change corrects an issue where if inflate or halve fails we were
exiting the resize function without at least updating the slen for the
node.  To correct this I have moved the update of max_size into the while
loop so that it is only decremented on a successful call to either inflate
or halve.
Signed-off-by: NAlexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>