Saeed Mahameed says:

====================
mlx5 driver fixes for 4.5-rc2

We added here a patch from Matan and Alaa for addressing Linus comments on
the mess w.r.t reserved field names in the driver/firmware auto-generated file.

Once the patch hits linus tree, we'll ask Doug to rebase his tree on that
rc so both net-next and rdma-next development for 4.6 will be done under
the fixed robust form.

Also provided two patches that addresses the dynamic ndo initialization
issue of mlx5e netdevice.

Or and Saeed.

changes from V1: (Only first patch was changed)
In this V we fixed the issues addressed in Or's previous e-mail.
	1. Offsets took into account two dimensional u8 arrays
	2. Offsets took into account nesting unions and structs
	3. Offsets for unions
	4. Offsets for any reserved field
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Currently our netdevice ops is a one static global variable which
is referenced by all mlx5e netdevice instances. This can be
problematic when different driver instances do not share same
HW capabilities (e.g SRIOV PF and VFs probed to the host).

Now we have two constant global netdevice ops variables, one
for basic netdevice ops and the other with extended SRIOV ops,
on netdevice construction we choose the one suitable for
current device capabilities.

Fixes: 66e49ded ("net/mlx5e: Add support for SR-IOV ndos")
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Currently mlx5e_select_queue is redundant since num_tc is always 1.
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

mlx5_ifc.h is a header file representing the API and ABI between
the driver to the firmware and hardware. This file is used from
both the mlx5_ib and mlx5_core drivers.

Previously, this file used incrementing counter to indicate
reserved fields, for example:

struct mlx5_ifc_odp_per_transport_service_cap_bits {
        u8         send[0x1];
        u8         receive[0x1];
        u8         write[0x1];
        u8         read[0x1];
        u8         reserved_0[0x1];
        u8         srq_receive[0x1];
        u8         reserved_1[0x1a];
};

If one developer implements through net-next feature A that uses
reserved_0, they replace it with featureA and renames reserved_1 to
reserved_0. In the same kernel cycle, a 2nd developer could implement
feature B through the rdma tree, that uses reserved_1 and split it to
featureB and a smaller reserved_1 field. This will cause a conflict
when the two trees are merged.

The source of this conflict is that the 1st developer changed *all*
reserved fields.

As Linus suggested, we change the layout of structs to:

struct mlx5_ifc_odp_per_transport_service_cap_bits {
	u8         send[0x1];
	u8         receive[0x1];
	u8         write[0x1];
	u8         read[0x1];
	u8         reserved_at_4[0x1];
	u8         srq_receive[0x1];
	u8         reserved_at_6[0x1a];
};

This makes the conflicts much more rare and preserves the locality of
changes.
Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Alaa Hleihel <alaa@mellanox.com>
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

There is presently a race condition between the bonding periodic
link monitor and the updating of a slave's speed and duplex.  The former
occurs on a periodic basis, and the latter in response to a driver's
calling of netif_carrier_on.

	It is possible for the periodic monitor to run between the
driver call of netif_carrier_on and the receipt of the NETDEV_CHANGE
event that causes bonding to update the slave's speed and duplex.  This
manifests most notably as a report that a slave is up and "0 Mbps full
duplex" after enslavement, but in principle could report an incorrect
speed and duplex after any link up event if the device comes up with a
different speed or duplex.  This affects the 802.3ad aggregator
selection, as the speed and duplex are selection criteria.

	This is fixed by updating the speed and duplex in the periodic
monitor, prior to using that information.

	This was done historically in bonding, but the call to
bond_update_speed_duplex was removed in commit 876254ae ("bonding:
don't call update_speed_duplex() under spinlocks"), as it might sleep
under lock.  Later, the locking was changed to only hold RTNL, and so
after commit 876254ae ("bonding: don't call update_speed_duplex()
under spinlocks") this call is again safe.
Tested-by: "Tantilov, Emil S" <emil.s.tantilov@intel.com>
Cc: Veaceslav Falico <vfalico@gmail.com>
Cc: dingtianhong <dingtianhong@huawei.com>
Fixes: 876254ae ("bonding: don't call update_speed_duplex() under spinlocks")
Signed-off-by: Jay Vosburgh <jay.vosburgh@canonical.com>
Acked-by: Ding Tianhong <dingtianhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The am79c961a.c driver fails to build with clang because of an
unusual inline assembly construct:

drivers/net/ethernet/amd/am79c961a.c:53:7: error: invalid % escape in inline assembly string
 "str%?h        %1, [%2]        @ NET_RAP\n\t"

The same change has been done a decade ago in arch/arm as of
6a39dd62 ("[ARM] 3759/2: Remove uses of %?"), but apparently
some drivers were missed.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

The smc91x driver doesn't honor the probe deferral mechanism when the
interrupt source is not yet available, such as one provided by a gpio
controller not probed.

Fix this by propagating the platform_get_irq() error code as the probe
return value.
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Florian Fainelli says:

====================
Subject: [PATCH net v2 0/4] net: phy: bcm7xxx 40nm PHY fixes

Here is a collection of fixes for the 40nm Ethernet PHY supported
by the 7xxx PHY driver, please also queue these fixes for stable.

Changes in v2:

- dropped the cleanup patch, not appropriate
- added another patch removing bogus wildcard entries
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Remove the two wildcard entries, they serve no purpose and will match way too
many devices, some of them being covered by the driver in
drivers/net/phy/broadcom.c. Remove the now unused bcm7xxx_dummy_config_init()
function which would produce a warning.

Fixes: b560a58c ("net: phy: add Broadcom BCM7xxx internal PHY driver")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Since we were wrongly advertising gigabit features for these 10/100 only
Ethernet PHYs, bcm7xxx_config_init() which is supposed to apply workaround
would have not run since the check would be true, now that we have fixed the
PHY features, remove that check since it has no reasoning to be there anymore.

Fixes: e18556ee ("net: phy: bcm7xxx: do not use PHY_BRCM_100MBPS_WAR")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The PHY entries for BCM7425/29/35 declare the 40nm Ethernet PHY as being
10/100/1000 capable, while this is just a 10/100 capable PHY device, fix that.

Fixes: d068b02c ("net: phy: add BCM7425 and BCM7429 PHYs")
Fixes: 9458ceab ("net: phy: bcm7xxx: Add entry for BCM7435")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The clear and set masks in the call to phy_set_clr_bits() called from
bcm7xxx_config_init() are inverted. We need to fix this by swapping the two
arguments, that is, set 0 bits, but clear the shade mode 2 enable bit.

Fixes: b560a58c ("net: phy: add Broadcom BCM7xxx internal PHY driver")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Sergei Shtylyov says:

====================
ravb: fix the fallout of R-Car gen3 gPTP support

   Here's a set of 2 patches against DaveM's 'net.git' repo fixing up the
incomplete commit f5d7837f ("ravb: ptp: Add CONFIG mode support").
I'm proposing these as fixes but they can be merged as cleanups as well...

[1/2] ravb: kill duplicate setting of CCC.CSEL
[2/2] ravb: skip gPTP start/stop on R-Car gen3
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

When adding support for the  R-Car gen3 gPTP active in configuration mode,
some call sites of ravb_ptp_{init|stop}() were missed due to an oversight.
Add  checks for the R-Car gen2 SoCs around these...

Fixes: f5d7837f ("ravb: ptp: Add CONFIG mode support")
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

When  adding support for the  R-Car gen3 gPTP active in configuration mode,
the code setting the CCC.CSEL field  was duplicated due to an oversight.
For R-Car gen 2 it's just redundant  and for R-Car gen3 the write at this
time is probably  ignored due to CCC.GAC bit being already  set...

Fixes: f5d7837f ("ravb: ptp: Add CONFIG mode support")
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Pablo Neira Ayuso says:

====================
Netfilter fixes for net

The following patchset contain a rather large batch for your net that
includes accumulated bugfixes, they are:

1) Run conntrack cleanup from workqueue process context to avoid hitting
   soft lockup via watchdog for large tables. This is required by the
   IPv6 masquerading extension. From Florian Westphal.

2) Use original skbuff from nfnetlink batch when calling netlink_ack()
   on error since this needs to access the skb->sk pointer.

3) Incremental fix on top of recent Sasha Levin's lock fix for conntrack
   resizing.

4) Fix several problems in nfnetlink batch message header sanitization
   and error handling, from Phil Turnbull.

5) Select NF_DUP_IPV6 based on CONFIG_IPV6, from Arnd Bergmann.

6) Fix wrong signess in return values on nf_tables counter expression,
   from Anton Protopopov.

Due to the NetDev 1.1 organization burden, I had no chance to pass up
this to you any sooner in this release cycle, sorry about that.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

The unix_dgram_sendmsg routine use the following test

if (unlikely(unix_peer(other) != sk && unix_recvq_full(other))) {

to determine if sk and other are in an n:1 association (either
established via connect or by using sendto to send messages to an
unrelated socket identified by address). This isn't correct as the
specified address could have been bound to the sending socket itself or
because this socket could have been connected to itself by the time of
the unix_peer_get but disconnected before the unix_state_lock(other). In
both cases, the if-block would be entered despite other == sk which
might either block the sender unintentionally or lead to trying to unlock
the same spin lock twice for a non-blocking send. Add a other != sk
check to guard against this.

Fixes: 7d267278 ("unix: avoid use-after-free in ep_remove_wait_queue")
Reported-By: Philipp Hahn <pmhahn@pmhahn.de>
Signed-off-by: Rainer Weikusat <rweikusat@mobileactivedefense.com>
Tested-by: Philipp Hahn <pmhahn@pmhahn.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

The present unix_stream_read_generic contains various code sequences of
the form

err = -EDISASTER;
if (<test>)
	goto out;

This has the unfortunate side effect of possibly causing the error code
to bleed through to the final

out:
	return copied ? : err;

and then to be wrongly returned if no data was copied because the caller
didn't supply a data buffer, as demonstrated by the program available at

http://pad.lv/1540731

Change it such that err is only set if an error condition was detected.

Fixes: 3822b5c2 ("af_unix: Revert 'lock_interruptible' in stream receive code")
Reported-by: Joseph Salisbury <joseph.salisbury@canonical.com>
Signed-off-by: Rainer Weikusat <rweikusat@mobileactivedefense.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

My analysis in the below mail applies, although the second part is
unnecessary because i isn't used in arithmetic operations here:

https://marc.info/?l=openbsd-tech&m=145377854103866&w=2

Thanks for your time.
Signed-off-by: Michael McConville <mmcco@mykolab.com>
Acked-by: Francois Romieu <romieu@fr.zoreil.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

BRIDGE_VLAN_FILTERING automatically adds a newly bridged port to the
VLAN with the bridge's default_pvid.

The mv88e6xxx driver currently reserves VLANs 4000+ for unbridged ports
isolation. When a port joins a bridge, it leaves its reserved VLAN. When
a port leaves a bridge, it joins again its reserved VLAN.

But if the VLAN filtering is disabled, or if this hardware VLAN is
already in use, the bridged port ends up with no default VLAN, and the
communication with the CPU is thus broken.

To fix this, make a port join its reserved VLAN once on setup, never
leave it, and restore its PVID after another one was eventually used.
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Tested-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

The current bridge code calls switchdev_port_obj_del on a VLAN port even
if the corresponding switchdev_port_obj_add call returned -EOPNOTSUPP.

If the DSA driver doesn't return -EOPNOTSUPP for a software port VLAN in
its port_vlan_del function, the VLAN is not deleted. Unbridging the port
also generates a stack trace for the same reason.

This can be quickly tested on a VLAN filtering enabled system with:

    # brctl addbr br0
    # brctl addif br0 lan0
    # brctl addbr br1
    # brctl addif br1 lan1
    # brctl delif br1 lan1

Both bridges have a default default_pvid set to 1. lan0 uses the
hardware VLAN 1 while lan1 falls back to the software VLAN 1.

Unbridging lan1 does not delete its software VLAN, and thus generates
the following stack trace:

    [ 2991.681705] device lan1 left promiscuous mode
    [ 2991.686237] br1: port 1(lan1) entered disabled state
    [ 2991.725094] ------------[ cut here ]------------
    [ 2991.729761] WARNING: CPU: 0 PID: 869 at net/bridge/br_vlan.c:314 __vlan_group_free+0x4c/0x50()
    [ 2991.738437] Modules linked in:
    [ 2991.741546] CPU: 0 PID: 869 Comm: ip Not tainted 4.4.0 #16
    [ 2991.747039] Hardware name: Freescale Vybrid VF5xx/VF6xx (Device Tree)
    [ 2991.753511] Backtrace:
    [ 2991.756008] [<80014450>] (dump_backtrace) from [<8001469c>] (show_stack+0x20/0x24)
    [ 2991.763604]  r6:80512644 r5:00000009 r4:00000000 r3:00000000
    [ 2991.769343] [<8001467c>] (show_stack) from [<80268e44>] (dump_stack+0x24/0x28)
    [ 2991.776618] [<80268e20>] (dump_stack) from [<80025568>] (warn_slowpath_common+0x98/0xc4)
    [ 2991.784750] [<800254d0>] (warn_slowpath_common) from [<80025650>] (warn_slowpath_null+0x2c/0x34)
    [ 2991.793557]  r8:00000000 r7:9f786a8c r6:9f76c440 r5:9f786a00 r4:9f68ac00
    [ 2991.800366] [<80025624>] (warn_slowpath_null) from [<80512644>] (__vlan_group_free+0x4c/0x50)
    [ 2991.808946] [<805125f8>] (__vlan_group_free) from [<80514488>] (nbp_vlan_flush+0x44/0x68)
    [ 2991.817147]  r4:9f68ac00 r3:9ec70000
    [ 2991.820772] [<80514444>] (nbp_vlan_flush) from [<80506f08>] (del_nbp+0xac/0x130)
    [ 2991.828201]  r5:9f56f800 r4:9f786a00
    [ 2991.831841] [<80506e5c>] (del_nbp) from [<8050774c>] (br_del_if+0x40/0xbc)
    [ 2991.838724]  r7:80590f68 r6:00000000 r5:9ec71c38 r4:9f76c440
    [ 2991.844475] [<8050770c>] (br_del_if) from [<80503dc0>] (br_del_slave+0x1c/0x20)
    [ 2991.851802]  r5:9ec71c38 r4:9f56f800
    [ 2991.855428] [<80503da4>] (br_del_slave) from [<80484a34>] (do_setlink+0x324/0x7b8)
    [ 2991.863043] [<80484710>] (do_setlink) from [<80485e90>] (rtnl_newlink+0x508/0x6f4)
    [ 2991.870616]  r10:00000000 r9:9ec71ba8 r8:00000000 r7:00000000 r6:9f6b0400 r5:9f56f800
    [ 2991.878548]  r4:8076278c
    [ 2991.881110] [<80485988>] (rtnl_newlink) from [<80484048>] (rtnetlink_rcv_msg+0x18c/0x22c)
    [ 2991.889315]  r10:9f7d4e40 r9:00000000 r8:00000000 r7:00000000 r6:9f7d4e40 r5:9f6b0400
    [ 2991.897250]  r4:00000000
    [ 2991.899814] [<80483ebc>] (rtnetlink_rcv_msg) from [<80497c74>] (netlink_rcv_skb+0xb0/0xcc)
    [ 2991.908104]  r8:00000000 r7:9f7d4e40 r6:9f7d4e40 r5:80483ebc r4:9f6b0400
    [ 2991.914928] [<80497bc4>] (netlink_rcv_skb) from [<80483eb4>] (rtnetlink_rcv+0x34/0x3c)
    [ 2991.922874]  r6:9f5ea000 r5:00000028 r4:9f7d4e40 r3:80483e80
    [ 2991.928622] [<80483e80>] (rtnetlink_rcv) from [<80497604>] (netlink_unicast+0x180/0x200)
    [ 2991.936742]  r4:9f4edc00 r3:80483e80
    [ 2991.940362] [<80497484>] (netlink_unicast) from [<80497a88>] (netlink_sendmsg+0x33c/0x350)
    [ 2991.948648]  r8:00000000 r7:00000028 r6:00000000 r5:9f5ea000 r4:9ec71f4c
    [ 2991.955481] [<8049774c>] (netlink_sendmsg) from [<80457ff0>] (sock_sendmsg+0x24/0x34)
    [ 2991.963342]  r10:00000000 r9:9ec71e28 r8:00000000 r7:9f1e2140 r6:00000000 r5:00000000
    [ 2991.971276]  r4:9ec71f4c
    [ 2991.973849] [<80457fcc>] (sock_sendmsg) from [<80458af0>] (___sys_sendmsg+0x1fc/0x204)
    [ 2991.981809] [<804588f4>] (___sys_sendmsg) from [<804598d0>] (__sys_sendmsg+0x4c/0x7c)
    [ 2991.989640]  r10:00000000 r9:9ec70000 r8:80010824 r7:00000128 r6:7ee946c4 r5:00000000
    [ 2991.997572]  r4:9f1e2140
    [ 2992.000128] [<80459884>] (__sys_sendmsg) from [<80459918>] (SyS_sendmsg+0x18/0x1c)
    [ 2992.007725]  r6:00000000 r5:7ee9c7b8 r4:7ee946e0
    [ 2992.012430] [<80459900>] (SyS_sendmsg) from [<80010660>] (ret_fast_syscall+0x0/0x3c)
    [ 2992.020182] ---[ end trace 5d4bc29f4da04280 ]---

To fix this, return -EOPNOTSUPP in _mv88e6xxx_port_vlan_del instead of
-ENOENT if the hardware VLAN doesn't exist or the port is not a member.
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Tested-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

smatch detected a suspicious looking bitop condition:

drivers/net/ethernet/cavium/liquidio/lio_main.c:2529
  handle_timestamp() warn: suspicious bitop condition

(skb_shinfo(skb)->tx_flags | SKBTX_IN_PROGRESS is always non-zero,
so the logic is definitely not correct.  Use & to mask the correct
bit.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Commit c0eb4540 ("hv_netvsc: Don't ask for additional head room in the
skb") got rid of needed_headroom setting for the driver. With the change I
hit the following issue trying to use ptkgen module:

[   57.522021] kernel BUG at net/core/skbuff.c:1128!
[   57.522021] invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC
...
[   58.721068] Call Trace:
[   58.721068]  [<ffffffffa0144e86>] netvsc_start_xmit+0x4c6/0x8e0 [hv_netvsc]
...
[   58.721068]  [<ffffffffa02f87fc>] ? pktgen_finalize_skb+0x25c/0x2a0 [pktgen]
[   58.721068]  [<ffffffff814f5760>] ? __netdev_alloc_skb+0xc0/0x100
[   58.721068]  [<ffffffffa02f9907>] pktgen_thread_worker+0x257/0x1920 [pktgen]

Basically, we're calling skb_cow_head(skb, RNDIS_AND_PPI_SIZE) and crash on
    if (skb_shared(skb))
        BUG();

We probably need to restore needed_headroom setting (but shrunk to
RNDIS_AND_PPI_SIZE as we don't need more) to request the required headroom
space. In theory, it should not give us performance penalty.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Gregory CLEMENT says:

====================
mvneta fixes for SMP

Following this bug report:
http://thread.gmane.org/gmane.linux.ports.arm.kernel/468173 and the
suggestions from Russell King, I reviewed all the code involving
multi-CPU. It ended with this series of patches which should improve
the stability of the driver.

During my test I found another bug which is fixed by new patch (the
second one of this new version of the series)

The two first patches fix real bugs, the others fix potential issues
in the driver.

Changelog:

v1 -> v2
Fix spinlock comment. Pointed by David Miller

v2 -> v3
 - Fix typos and mistake in the comments. Pointed by Sergei Shtylyov
 - Add a new patch fixing the CPU choice in mvneta_percpu_elect
 - Use lock in last patch to prevent remaining race condition. Pointed
   by Jisheng
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

When stopping the port, the CPU notifier are still there whereas the
mvneta_stop_dev function calls mvneta_percpu_disable() on each CPUs.
It was possible to have a new CPU coming at this point which could be
racy.

This patch adds a flag preventing executing the code notifier for a new
CPU when the port is stopping. It also uses the spinlock introduces
previously. To avoid the deadlock, the lock has been moved outside the
mvneta_percpu_elect function.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Electing a CPU must be done in an atomic way: it should be done after or
before the removal/insertion of a CPU and this function is not reentrant.

During the loop of mvneta_percpu_elect we associates the queues to the
CPUs, if there is a topology change during this loop, then the mapping
between the CPUs and the queues could be wrong. During this loop the
interrupt mask is also updating for each CPUs, It should not be changed
in the same time by other part of the driver.

This patch adds spinlock to create the needed critical sections.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

In the MVNETA_INTR_* registers, the queues related fields are per cpu,
according to the datasheet (comment in [] are added by me):
"In a multi-CPU system, bits of RX[or TX] queues for which the access by
the reading[or writing] CPU is disabled are read as 0, and cannot be
cleared[or written]."

That means that each time we want to manipulate these bits we had to do
it on each cpu and not only on the current cpu.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Since the commit 2dcf75e2 ("net: mvneta: Associate RX queues with
each CPU") all the percpu irq are used and disabled at initialization, so
there is no point to disable them first.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Instead of using a for_each_* loop in which we just call the
smp_call_function_single macro, it is more simple to directly use the
on_each_cpu macro. Moreover, this macro ensures that the calls will be
done all at once.
Suggested-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

When passing to the management of multiple RX queue, the
mvneta_percpu_elect function was broken. The use of the modulo can lead
to elect the wrong cpu. For example with rxq_def=2, if the CPU 2 goes
offline and then online, we ended with the third RX queue activated in
the same time on CPU 0 and CPU2, which lead to a kernel crash.

With this fix, we don't try to get "the closer" CPU if the default CPU is
gone, now we just use CPU 0 which always be there. Thanks to this, the
code becomes more readable, easier to maintain and more predicable.

Cc: stable@vger.kernel.org
Fixes: 2dcf75e2 ("net: mvneta: Associate RX queues with each CPU")
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch convert the for_each_present in on_each_cpu, instead of
applying on the present cpus it will be applied only on the online cpus.
This fix a bug reported on
http://thread.gmane.org/gmane.linux.ports.arm.kernel/468173.

Using the macro on_each_cpu (instead of a for_each_* loop) also ensures
that all the calls will be done all at once.

Fixes: f8642885 ("net: mvneta: Statically assign queues to CPUs")
Reported-by: Stefan Roese <stefan.roese@gmail.com>
Suggested-by: Jisheng Zhang <jszhang@marvell.com>
Suggested-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

We receoved a bug report from someone using vmware:

WARNING: CPU: 3 PID: 660 at kernel/sched/core.c:7389
__might_sleep+0x7d/0x90()
do not call blocking ops when !TASK_RUNNING; state=1 set at
[<ffffffff810fa68d>] prepare_to_wait+0x2d/0x90
Modules linked in: vmw_vsock_vmci_transport vsock snd_seq_midi
snd_seq_midi_event snd_ens1371 iosf_mbi gameport snd_rawmidi
snd_ac97_codec ac97_bus snd_seq coretemp snd_seq_device snd_pcm
snd_timer snd soundcore ppdev crct10dif_pclmul crc32_pclmul
ghash_clmulni_intel vmw_vmci vmw_balloon i2c_piix4 shpchp parport_pc
parport acpi_cpufreq nfsd auth_rpcgss nfs_acl lockd grace sunrpc btrfs
xor raid6_pq 8021q garp stp llc mrp crc32c_intel serio_raw mptspi vmwgfx
drm_kms_helper ttm drm scsi_transport_spi mptscsih e1000 ata_generic
mptbase pata_acpi
CPU: 3 PID: 660 Comm: vmtoolsd Not tainted
4.2.0-0.rc1.git3.1.fc23.x86_64 #1
Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop
Reference Platform, BIOS 6.00 05/20/2014
 0000000000000000 0000000049e617f3 ffff88006ac37ac8 ffffffff818641f5
 0000000000000000 ffff88006ac37b20 ffff88006ac37b08 ffffffff810ab446
 ffff880068009f40 ffffffff81c63bc0 0000000000000061 0000000000000000
Call Trace:
 [<ffffffff818641f5>] dump_stack+0x4c/0x65
 [<ffffffff810ab446>] warn_slowpath_common+0x86/0xc0
 [<ffffffff810ab4d5>] warn_slowpath_fmt+0x55/0x70
 [<ffffffff8112551d>] ? debug_lockdep_rcu_enabled+0x1d/0x20
 [<ffffffff810fa68d>] ? prepare_to_wait+0x2d/0x90
 [<ffffffff810fa68d>] ? prepare_to_wait+0x2d/0x90
 [<ffffffff810da2bd>] __might_sleep+0x7d/0x90
 [<ffffffff812163b3>] __might_fault+0x43/0xa0
 [<ffffffff81430477>] copy_from_iter+0x87/0x2a0
 [<ffffffffa039460a>] __qp_memcpy_to_queue+0x9a/0x1b0 [vmw_vmci]
 [<ffffffffa0394740>] ? qp_memcpy_to_queue+0x20/0x20 [vmw_vmci]
 [<ffffffffa0394757>] qp_memcpy_to_queue_iov+0x17/0x20 [vmw_vmci]
 [<ffffffffa0394d50>] qp_enqueue_locked+0xa0/0x140 [vmw_vmci]
 [<ffffffffa039593f>] vmci_qpair_enquev+0x4f/0xd0 [vmw_vmci]
 [<ffffffffa04847bb>] vmci_transport_stream_enqueue+0x1b/0x20
[vmw_vsock_vmci_transport]
 [<ffffffffa047ae05>] vsock_stream_sendmsg+0x2c5/0x320 [vsock]
 [<ffffffff810fabd0>] ? wake_atomic_t_function+0x70/0x70
 [<ffffffff81702af8>] sock_sendmsg+0x38/0x50
 [<ffffffff81702ff4>] SYSC_sendto+0x104/0x190
 [<ffffffff8126e25a>] ? vfs_read+0x8a/0x140
 [<ffffffff817042ee>] SyS_sendto+0xe/0x10
 [<ffffffff8186d9ae>] entry_SYSCALL_64_fastpath+0x12/0x76

transport->stream_enqueue may call copy_to_user so it should
not be called inside a prepare_to_wait. Narrow the scope of
the prepare_to_wait to avoid the bad call. This also applies
to vsock_stream_recvmsg as well.
Reported-by: Vinson Lee <vlee@freedesktop.org>
Tested-by: Vinson Lee <vlee@freedesktop.org>
Signed-off-by: Laura Abbott <labbott@fedoraproject.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

There are typos in setting RTL8168H hardware parameters. If system install
another version driver that may cuase system hang.
Signed-off-by: Chunhao Lin <hau@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Dmitry reported memory leaks of IP options allocated in
ip_cmsg_send() when/if this function returns an error.

Callers are responsible for the freeing.

Many thanks to Dmitry for the report and diagnostic.
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The return value of kzalloc on failure of allocation of memory should
be -ENOMEM and not -1.

Found using Coccinelle. A simplified version of the semantic patch
used is:

//<smpl>
@@
expression *e;
position p,q;
@@

e@q = kzalloc(...);
if@p (e == NULL) {
...
return
- -1
+ -ENOMEM
;
}
//</smpl>

This function may also return -1 after calling mpp2_prs_tcam_port_map_get.
So that the function consistently returns meaningful error values on
failure, the -1 is changed to -EINVAL.
Signed-off-by: Amitoj Kaur Chawla <amitoj1606@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The return value of vmalloc on failure of allocation of memory should
be -ENOMEM and not -1.

Found using Coccinelle. A simplified version of the semantic patch
used is:

//<smpl>
@@
expression *e;
identifier l1;
position p,q;
@@

e@q = vmalloc(...);
if@p (e == NULL) {
...
goto l1;
}
l1:
...
return -1
+ -ENOMEM
;
//</smpl

The single call site of the containing function checks whether the
returned value is -1, so this check is changed as well. The single call
site of this call site, however, only checks whether the value is not 0,
so no further change was required.
Signed-off-by: Amitoj Kaur Chawla <amitoj1606@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The current logic in bond_arp_rcv will accept an incoming ARP for
validation if (a) the receiving slave is either "active" (which includes
the currently active slave, or the current ARP slave) or, (b) there is a
currently active slave, and it has received an ARP since it became active.
For case (b), the receiving slave isn't the currently active slave, and is
receiving the original broadcast ARP request, not an ARP reply from the
target.

	This logic can fail if there is no currently active slave.  In
this situation, the ARP probe logic cycles through all slaves, assigning
each in turn as the "current_arp_slave" for one arp_interval, then setting
that one as "active," and sending an ARP probe from that slave.  The
current logic expects the ARP reply to arrive on the sending
current_arp_slave, however, due to switch FDB updating delays, the reply
may be directed to another slave.

	This can arise if the bonding slaves and switch are working, but
the ARP target is not responding.  When the ARP target recovers, a
condition may result wherein the ARP target host replies faster than the
switch can update its forwarding table, causing each ARP reply to be sent
to the previous current_arp_slave.  This will never pass the logic in
bond_arp_rcv, as neither of the above conditions (a) or (b) are met.

	Some experimentation on a LAN shows ARP reply round trips in the
200 usec range, but my available switches never update their FDB in less
than 4000 usec.

	This patch changes the logic in bond_arp_rcv to additionally
accept an ARP reply for validation on any slave if there is a current ARP
slave and it sent an ARP probe during the previous arp_interval.

Fixes: aeea64ac ("bonding: don't trust arp requests unless active slave really works")
Cc: Veaceslav Falico <vfalico@gmail.com>
Cc: Andy Gospodarek <gospo@cumulusnetworks.com>
Signed-off-by: Jay Vosburgh <jay.vosburgh@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Pull GPIO fixes from Linus Walleij:
 - Probe errorpath fix for the Altera
 - irqchip ofnode pointer added to the DaVinci driver
 - controller instance number correction for DaVinci

* tag 'gpio-v4.5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpio: davinci: Fix the number of controllers allocated
  gpio: davinci: Add the missing of-node pointer
  gpio: gpio-altera: Remove gpiochip on probe failure.

Merge tag 'platform-drivers-x86-v4.5-3' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86

Pull x86 platform driver fixes from Darren Hart:
 "Just two small fixes for the 4.5-rc cycle:

  intel_scu_ipcutil:
   - underflow in scu_reg_access()

  intel-hid:
   - fix incorrect entries in intel_hid_keymap"

* tag 'platform-drivers-x86-v4.5-3' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86:
  intel_scu_ipcutil: underflow in scu_reg_access()
  intel-hid: fix incorrect entries in intel_hid_keymap

Pull networking fixes from David Miller:

 1) Fix BPF handling of branch offset adjustmnets on backjumps, from
    Daniel Borkmann.

 2) Make sure selinux knows about SOCK_DESTROY netlink messages, from
    Lorenzo Colitti.

 3) Fix openvswitch tunnel mtu regression, from David Wragg.

 4) Fix ICMP handling of TCP sockets in syn_recv state, from Eric
    Dumazet.

 5) Fix SCTP user hmacid byte ordering bug, from Xin Long.

 6) Fix recursive locking in ipv6 addrconf, from Subash Abhinov
    Kasiviswanathan.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
  bpf: fix branch offset adjustment on backjumps after patching ctx expansion
  vxlan, gre, geneve: Set a large MTU on ovs-created tunnel devices
  geneve: Relax MTU constraints
  vxlan: Relax MTU constraints
  flow_dissector: Fix unaligned access in __skb_flow_dissector when used by eth_get_headlen
  of: of_mdio: Add marvell, 88e1145 to whitelist of PHY compatibilities.
  selinux: nlmsgtab: add SOCK_DESTROY to the netlink mapping tables
  sctp: translate network order to host order when users get a hmacid
  enic: increment devcmd2 result ring in case of timeout
  tg3: Fix for tg3 transmit queue 0 timed out when too many gso_segs
  net:Add sysctl_max_skb_frags
  tcp: do not drop syn_recv on all icmp reports
  ipv6: fix a lockdep splat
  unix: correctly track in-flight fds in sending process user_struct
  update be2net maintainers' email addresses
  dwc_eth_qos: Reset hardware before PHY start
  ipv6: addrconf: Fix recursive spin lock call