Noted that 3c59x has no checks on transmit for failed DMA mappings, and no
ability to unmap fragments when a single map fails in the middle of a transmit.
This patch provides error checking to ensure that dma mappings work properly,
and unrolls an skb mapping if a fragmented skb transmission has a mapping
failure to prevent leaks.
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
CC: Linux Kernel list <linux-kernel@vger.kernel.org>
CC: "David S. Miller" <davem@davemloft.net>
CC: Meelis Roos <mroos@linux.ee>
Tested-by: Meelis Roos <mroos@linux.ee>

fix several issues in sparc BPF JIT compiler.

ldx/stx related:
. classic BPF instructions that access mem[] slots were not setting
  SEEN_MEM flag, so stack wasn't allocated. Fix that by advertising
  correct flags

. LDX/STX instructions were missing SEEN_XREG, so register value
  could have leaked to user space. Fix it.

. since stack for mem[] slots is allocated with 'sub %sp' instead
  of 'save %sp', use %sp as base register instead of %fp.

. ldx mem[0] means first slot in classic BPF which should have
  -4 offset instead of 0.

. sparc64 needs 2047 stack bias as per ABI to access stack

. emit_stmem() was using LD32I macro instead of ST32I

SKF_AD_VLAN_TAG* related:
. SKF_AD_VLAN_TAG_PRESENT must return 1 or 0 instead of '> 0' or 0
  as per classic BPF de facto standard

. SKF_AD_VLAN_TAG needs to mask the field correctly

Fixes: 2809a208 ("net: filter: Just In Time compiler for sparc")
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

There are other kconfig symbols which use SCSI_FC_ATTRS.
In order to maintain sanity and prevent kconfig warnings, change
all of these from using 'select' to using 'depends on' so that
proper symbol dependencies will be honored and circular depends
problems will be avoided.
This fixes kconfig warnings and build errors:

warning: (LIBFC && SCSI_IBMVFC && SCSI_QLA_FC && SCSI_LPFC && ZFCP && SCSI_BFA_FC && SCSI_CHELSIO_FCOE && FUSION_FC) selects SCSI_FC_ATTRS which has unmet direct dependencies (SCSI && NET)
drivers/scsi/scsi_transport_fc.c: In function 'fc_host_post_event':
drivers/scsi/scsi_transport_fc.c:543:7: error: 'scsi_nl_sock' undeclared (first use in this function)
drivers/scsi/scsi_transport_fc.c: In function 'fc_host_post_vendor_event':
drivers/scsi/scsi_transport_fc.c:611:7: error: 'scsi_nl_sock' undeclared (first use in this function)

Reported-by: Fengguang Wu <fengguang.wu@intel.com> [0-day test robot]
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Reported by Nikolay Aleksandrov.  In efx_init_port() we call
 efx_mac_reconfigure() to work around a Falcon/A1 limitation, and this calls
 efx_{arch}_filter_sync_rx_mode(), which takes the addr_list_lock; but this
 lock is uninitialised, because we haven't called register_netdevice() yet.
So, in efx_farch_filter_sync_rx_mode(), check efx_dev_registered() before
 doing anything else.
The EF10 equivalent, efx_ef10_filter_sync_rx_mode(), already has the
 corresponding check.
Signed-off-by: Edward Cree <ecree@solarflare.com>
Tested-by: Nikolay Aleksandrov <nikolay@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Remove the "changed" test in __rtl8169_set_features(). Instead, do
simple test in rtl8169_set_features().

Set the RxChkSum and RxVlan through __rtl8169_set_features() in
rtl_open().
Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Fix build errors when CONFIG_SCSI_NETLINK is enabled but
CONFIG_NET is not enabled:

drivers/built-in.o: In function `scsi_nl_rcv_msg':
scsi_netlink.c:(.text+0x1850fa): undefined reference to `netlink_ack'
scsi_netlink.c:(.text+0x185105): undefined reference to `skb_pull'
scsi_netlink.c:(.text+0x18515d): undefined reference to `netlink_capable'
drivers/built-in.o: In function `scsi_netlink_init':
(.text+0x185244): undefined reference to `init_net'
drivers/built-in.o: In function `scsi_netlink_init':
(.text+0x185258): undefined reference to `__netlink_kernel_create'
drivers/built-in.o: In function `scsi_netlink_exit':
(.text+0x185291): undefined reference to `netlink_kernel_release'
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Anish Bhatt <anish@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Anish Bhatt says:

====================
net: Fix randconfig errros in bnx2i/bnx2fc caused by IPV6

Just like CNIC bnx2i/bnx2fc also have their tristate dependent on IPV6, however
using the same solution as CNIC can cause recursive dependecies during make.

Based on suggestions by Randy Dunlap, SCSI_NETLINK now depends on NET instead
 of selecting NET. Second patch fixes the actual randconfig error.

Entire thread can be followed here : https://lkml.org/lkml/2014/9/9/500

Fixes: c99d667e ("cnic : Cleanup CONFIG_IPV6 & VLAN check")
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Just like CNIC, tristate of these two modules is also dependent on IPV6.
These need to be handled separately as they select CNIC, which can override
tristate for CNIC from 'm' to 'y', which can cause build failures when ipv6 is
 compiled as a module even if CNIC's Kconfig will only 'm' or 'n' when ipv6 is
compiled as a module.

Fixes: c99d667e ("cnic : Cleanup CONFIG_IPV6 & VLAN check")
Signed-off-by: Anish Bhatt <anish@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Required for avoiding recursive dependencies in the Kconfig, brought out
by fixing randconfig error for bnx2i/bnx2fc in the patch that follows.
As suggested by Randy Dunlap
Signed-off-by: Anish Bhatt <anish@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

commit 35b1de55 ("rdma/cxgb4: Fixes cxgb4 probe failure in VM when PF is
exposed through PCI Passthrough") moved the code to check for SR-IOV PF[0..3]
much further down in init_one() past the point where we allocate a (struct
adapter) for PF[0..3]. As a result, we left four of these on ever module remove.

Fix: Allocate adapter structure only for PF4
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

As Toshiaki Makita pointed out, the BRIDGE_INPUT_SKB_CB will
not be initialized in br_should_learn() as that function
is called only from br_handle_local_finish().  That is
an input handler for link-local ethernet traffic so it perfectly
correct to check br->vlan_enabled here.

Reported-by: Toshiaki Makita<toshiaki.makita1@gmail.com>
Fixes: 20adfa1a bridge: Check if vlan filtering is enabled only once.
Signed-off-by: Vladislav Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

__netdev_adjacent_dev_insert may add adjust device of different net
namespace, without proper check it leads to emergence of broken
sysfs links from/to devices in another namespace.
Fix: rewrite netdev_adjacent_is_neigh_list macro as a function,
     move net_eq check into netdev_adjacent_is_neigh_list.
     (thanks David)
     related to: 4c75431aSigned-off-by: Alexander Fomichev <git.user@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The KSZ9031 appears to suffer from the same hardware bug as described
for the KSZ9021 in commit 32fcafbc
("net/phy: micrel: Disable asymmetric pause for KSZ9021")
you have to unplug the cable and plug it back to get it to work.

Remove the SUPPORTED_Asym_Pause flag for the KSZ9031 to fix this.
Signed-off-by: Mike Looijmans <mike.looijmans@topic.nl>
Signed-off-by: David S. Miller <davem@davemloft.net>

Vladislav Yasevich says:

====================
bridge: Two small fixes to vlan filtering code.

This series corrects 2 small issues that I've ran across recently
while doing more work with vlan filtering changes.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Currently, it is possible to modify the vlan filter
configuration to add pvid or untagged support.
For example:
  bridge vlan add vid 10 dev eth0
  bridge vlan add vid 10 dev eth0 untagged pvid

The second statement will modify vlan 10 to
include untagged and pvid configuration.
However, it is currently impossible to go backwards
  bridge vlan add vid 10 dev eth0 untagged pvid
  bridge vlan add vid 10 dev eth0

Here nothing happens.  This patch correct this so
that any modifiers not supplied are removed from
the configuration.
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The bridge code checks if vlan filtering is enabled on both
ingress and egress.   When the state flip happens, it
is possible for the bridge to currently be forwarding packets
and forwarding behavior becomes non-deterministic.  Bridge
may drop packets on some interfaces, but not others.

This patch solves this by caching the filtered state of the
packet into skb_cb on ingress.  The skb_cb is guaranteed to
not be over-written between the time packet entres bridge
forwarding path and the time it leaves it.  On egress, we
can then check the cached state to see if we need to
apply filtering information.
Signed-off-by: Vladislav Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The problem is that the slave is first linked and slave_cnt is
incremented afterwards leading to a div by zero in the modes that use it
as a modulus. What happens is that in bond_start_xmit()
bond_has_slaves() is used to evaluate further transmission and it becomes
true after the slave is linked in, but when slave_cnt is used in the xmit
path it is still 0, so fetch it once and transmit based on that. Since
it is used only in round-robin and XOR modes, the fix is only for them.
Thanks to Eric Dumazet for pointing out the fault in my first try to fix
this.

Call trace (took it out of net-next kernel, but it's the same with net):
[46934.330038] divide error: 0000 [#1] SMP
[46934.330041] Modules linked in: bonding(O) 9p fscache
snd_hda_codec_generic crct10dif_pclmul
[46934.330041] bond0: Enslaving eth1 as an active interface with an up
link
[46934.330051]  ppdev joydev crc32_pclmul crc32c_intel 9pnet_virtio
ghash_clmulni_intel snd_hda_intel 9pnet snd_hda_controller parport_pc
serio_raw pcspkr snd_hda_codec parport virtio_balloon virtio_console
snd_hwdep snd_pcm pvpanic i2c_piix4 snd_timer i2ccore snd soundcore
virtio_blk virtio_net virtio_pci virtio_ring virtio ata_generic
pata_acpi floppy [last unloaded: bonding]
[46934.330053] CPU: 1 PID: 3382 Comm: ping Tainted: G           O
3.17.0-rc4+ #27
[46934.330053] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[46934.330054] task: ffff88005aebf2c0 ti: ffff88005b728000 task.ti:
ffff88005b728000
[46934.330059] RIP: 0010:[<ffffffffa0198c33>]  [<ffffffffa0198c33>]
bond_start_xmit+0x1c3/0x450 [bonding]
[46934.330060] RSP: 0018:ffff88005b72b7f8  EFLAGS: 00010246
[46934.330060] RAX: 0000000000000679 RBX: ffff88004b077000 RCX:
000000000000002a
[46934.330061] RDX: 0000000000000000 RSI: ffff88004b3f0500 RDI:
ffff88004b077940
[46934.330061] RBP: ffff88005b72b830 R08: 00000000000000c0 R09:
ffff88004a83e000
[46934.330062] R10: 000000000000ffff R11: ffff88004b1f12c0 R12:
ffff88004b3f0500
[46934.330062] R13: ffff88004b3f0500 R14: 000000000000002a R15:
ffff88004b077940
[46934.330063] FS:  00007fbd91a4c740(0000) GS:ffff88005f080000(0000)
knlGS:0000000000000000
[46934.330064] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[46934.330064] CR2: 00007f803a8bb000 CR3: 000000004b2c9000 CR4:
00000000000406e0
[46934.330069] Stack:
[46934.330071]  ffffffff811e6169 00000000e772fa05 ffff88004b077000
ffff88004b3f0500
[46934.330072]  ffffffff81d17d18 000000000000002a 0000000000000000
ffff88005b72b8a0
[46934.330073]  ffffffff81620108 ffffffff8161fe0e ffff88005b72b8c4
ffff88005b302000
[46934.330073] Call Trace:
[46934.330077]  [<ffffffff811e6169>] ?
__kmalloc_node_track_caller+0x119/0x300
[46934.330084]  [<ffffffff81620108>] dev_hard_start_xmit+0x188/0x410
[46934.330086]  [<ffffffff8161fe0e>] ? harmonize_features+0x2e/0x90
[46934.330088]  [<ffffffff81620b06>] __dev_queue_xmit+0x456/0x590
[46934.330089]  [<ffffffff81620c50>] dev_queue_xmit+0x10/0x20
[46934.330090]  [<ffffffff8168f022>] arp_xmit+0x22/0x60
[46934.330091]  [<ffffffff8168f090>] arp_send.part.16+0x30/0x40
[46934.330092]  [<ffffffff8168f1e5>] arp_solicit+0x115/0x2b0
[46934.330094]  [<ffffffff8160b5d7>] ? copy_skb_header+0x17/0xa0
[46934.330096]  [<ffffffff8162875a>] neigh_probe+0x4a/0x70
[46934.330097]  [<ffffffff8162979c>] __neigh_event_send+0xac/0x230
[46934.330098]  [<ffffffff8162a00b>] neigh_resolve_output+0x13b/0x220
[46934.330100]  [<ffffffff8165f120>] ? ip_forward_options+0x1c0/0x1c0
[46934.330101]  [<ffffffff81660478>] ip_finish_output+0x1f8/0x860
[46934.330102]  [<ffffffff81661f08>] ip_output+0x58/0x90
[46934.330103]  [<ffffffff81661602>] ? __ip_local_out+0xa2/0xb0
[46934.330104]  [<ffffffff81661640>] ip_local_out_sk+0x30/0x40
[46934.330105]  [<ffffffff81662a66>] ip_send_skb+0x16/0x50
[46934.330106]  [<ffffffff81662ad3>] ip_push_pending_frames+0x33/0x40
[46934.330107]  [<ffffffff8168854c>] raw_sendmsg+0x88c/0xa30
[46934.330110]  [<ffffffff81612b31>] ? skb_recv_datagram+0x41/0x60
[46934.330111]  [<ffffffff816875a9>] ? raw_recvmsg+0xa9/0x1f0
[46934.330113]  [<ffffffff816978d4>] inet_sendmsg+0x74/0xc0
[46934.330114]  [<ffffffff81697a9b>] ? inet_recvmsg+0x8b/0xb0
[46934.330115] bond0: Adding slave eth2
[46934.330116]  [<ffffffff8160357c>] sock_sendmsg+0x9c/0xe0
[46934.330118]  [<ffffffff81603248>] ?
move_addr_to_kernel.part.20+0x28/0x80
[46934.330121]  [<ffffffff811b4477>] ? might_fault+0x47/0x50
[46934.330122]  [<ffffffff816039b9>] ___sys_sendmsg+0x3a9/0x3c0
[46934.330125]  [<ffffffff8144a14a>] ? n_tty_write+0x3aa/0x530
[46934.330127]  [<ffffffff810d1ae4>] ? __wake_up+0x44/0x50
[46934.330129]  [<ffffffff81242b38>] ? fsnotify+0x238/0x310
[46934.330130]  [<ffffffff816048a1>] __sys_sendmsg+0x51/0x90
[46934.330131]  [<ffffffff816048f2>] SyS_sendmsg+0x12/0x20
[46934.330134]  [<ffffffff81738b29>] system_call_fastpath+0x16/0x1b
[46934.330144] Code: 48 8b 10 4c 89 ee 4c 89 ff e8 aa bc ff ff 31 c0 e9
1a ff ff ff 0f 1f 00 4c 89 ee 4c 89 ff e8 65 fb ff ff 31 d2 4c 89 ee 4c
89 ff <f7> b3 64 09 00 00 e8 02 bd ff ff 31 c0 e9 f2 fe ff ff 0f 1f 00
[46934.330146] RIP  [<ffffffffa0198c33>] bond_start_xmit+0x1c3/0x450
[bonding]
[46934.330146]  RSP <ffff88005b72b7f8>

CC: Eric Dumazet <eric.dumazet@gmail.com>
CC: Andy Gospodarek <andy@greyhouse.net>
CC: Jay Vosburgh <j.vosburgh@gmail.com>
CC: Veaceslav Falico <vfalico@gmail.com>
Fixes: 278b2083 ("bonding: initial RCU conversion")
Signed-off-by: Nikolay Aleksandrov <nikolay@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Hayes Wang says:

====================
r8169: fix rx vlan

There are two issues for hw rx vlan. The patches are
used to fix them.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

The setting should depend on the new features not the current one.
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

If the parameter "features" of __rtl8169_set_features() is equal to
dev->features, the variable "changed" is alwayes 0, and nothing would
be changed.
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

During suspend and resume in Dual EMAC, second port is not working as in
suspend/resume only the first slave netdev is closed and opened. So bring
down and up all the interfaces that are up during suspend/resume.
Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Tested-by: Nishanth Menon <nm@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

nstat->multicast refers to received packets, not transmitted as
is returned here. Change it so that received packet stats are
given.
Signed-off-by: Mark Einon <mark.einon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

John W. Linville says:

====================
pull request: wireless 2014-09-11

Please pull this batch of fixes intended for the 3.17 stream:

For the mac80211 bits, Johannes says:

"Two more fixes for mac80211 - one of them addresses a long-standing
issue that we only found when using vendor events more frequently;
the other addresses some bad information being reported in userspace
that people were starting to actually look at."

For the iwlwifi bits, Emmanuel says:

"I re-enable scheduled scan on firmware that contain the fix for
the bug that Linus reported.  A few trivial fixes: endianity issues,
the same DTIM period fix that I did in mac80211.  Eyal fixes a few
issues we identified with EAPOL, we now send them just as if they were
management frames, this solves interrop issues.  Johannes has another
set of trivial fixes, while Luca fixes the way we configure the filters
in the firmware. Last but not least, a new device is added by Oren."

Emmanuel was traveling, resulting in his pull to be a bit larger than
I would have liked to see at this point.  FWIW, I have asked Emmanuel
to be much more strict for any more pull requests in this cycle.

In addition to the above, Sujith Manoharan reverts an earlier ath9k
patch.  The earlier change was found to allow for the device to sleep
too long and miss beacons.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Marc Kleine-Budde says:

====================
pull-request: can 2014-09-11

this is a pull request for the current release cycle of a single patch.

The patch by David Jander fixes a scheduling while atomic problem in the
flexcan driver, that was introduced by me in v3.14-rc6.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

If we try to rmmod the driver for an interface while sockets with
setsockopt(JOIN_ANYCAST) are alive, some refcounts aren't cleaned up
and we get stuck on:

  unregister_netdevice: waiting for ens3 to become free. Usage count = 1

If we LEAVE_ANYCAST/close everything before rmmod'ing, there is no
problem.

We need to perform a cleanup similar to the one for multicast in
addrconf_ifdown(how == 1).
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Beniamino Galvani says:

====================
net: arc_emac: fix tx issues

the patches below solve some issues found in the tx ring reclaim
strategy currently implemented in the arc_emac driver.

Without these patches a simple outgoing UDP flow blocks almost
immediately with the socket send buffer full, until some new rx
packets trigger a clean of the tx ring.

Everything seems to work fine on a Radxa Rock with this fix applied.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch changes the logic in tx path to ensure that tx descriptors
are reused for transmission only after they have been reclaimed by
arc_emac_tx_clean().
Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

In the current implementation the cleaning of tx ring is done by the
NAPI poll handler, which is scheduled after rx interrupts. Thus, in
absence of received packets the reclaim of used tx buffers is never
executed, blocking further transmission.

This can be easily reproduced starting the transmission of a UDP flow
with iperf, which blocks almost immediately because skbs are not
returned to the stack and the socket send buffer becomes full.

The patch enables tx interrupts so that the tx reclaim is scheduled
after completed transmissions.
Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This reverts commit 09ebb810.

ath9k_hw_set_sta_beacon_timers() configures AR_TIM_PERIOD with
the beacon interval. Before this commit, the sleepduration was
never greater than the beacon interval. But now, the behavior
has changed. For example, with an AP that uses a beacon interval of 100:

ath: phy9: next beacon 61128704
ath: phy9: beacon period 204800
ath: phy9: DTIM period 204800

If the sleepduration is calculated based on the listen time, then
the bmiss threshold should also be changed since the HW would
be in sleep state for a longer time, but that is not done currently.

To avoid configuring a higher beacon interval based on the sleepduration,
revert to the original behavior. Power consumption is not a
problem since PS is disabled in ath9k anyway.

Cc: stable@vger.kernel.org
Cc: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

Apparently can_restart() runs from a (timer-) interrupt and can call
flexcan_chip_[en|dis]able(), so avoid using usleep_range()
Signed-off-by: David Jander <david@protonic.nl>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

MIPS supports BPF JIT since v3.16-rc1

Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Daniel Borkmann <dborkman@redhat.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: linux-doc@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Acked-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

We wrongly tested QP context bits without BE conversion
as was spotted by sparse...

drivers/infiniband/hw/mlx4/qp.c:1685:38: sparse: restricted __be32 degrades to integer

Fix that!

Fixes: d2fce8a9 ('mlx4: Set user-space raw Ethernet QPs to properly handle VXLAN traffic')
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Or Gerlitz says:

====================
mlx4 SRIOV fixes

This series contains few SRIOV related fixes from Matan, please apply to net.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Changing the vlan stripping policy of the QP isn't supported by older
firmware versions for the INIT2RTR command. Nevertheless, we've used it.

Fix that by doing this policy change using INIT2RTR only if the firmware
supports it, otherwise, we call UPDATE_QP command to do the task.

Fixes: 7677fc9 ('net/mlx4: Strengthen VLAN tags/priorities enforcement in VST mode')
Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The current wrapper implementation of the UPDATE_QP command tries to get
the MAC index, even if MAC wasn't set by the VF. Fix it up to only handle
the MAC field if it's valid.

Fixes: ce8d9e0d ('net/mlx4_core: Add UPDATE_QP SRIOV wrapper support')
Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

When doing VGT->VST->VGT state changes, we used an incorrect mask
for the vlan-stripping-disable (VSD) flag, hence the vlan related policy
for user-space Raw Ethernet QPs open by VFs wasn't really applied.

Fix that, by using the correct mask.

Fixes: f0f829bf ('net/mlx4_core: Add immediate activate for VGT->VST->VGT')
Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Single port VFs are seen PCI wise on both ports of the PF (we don't have
single port PFs with ConnectX). With this in mind, it's possible for
virtualization tools to try and configure a single ported VF through
the "wrong" PF port.

To handle that, we use the PF driver mapping of single port VFs to NIC
ports and adjust the port value before calling into the low level
code that does the actual VF configuration

Fixes: 449fc488 ('net/mlx4: Adapt code for N-Port VF')
Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

In Dual EMAC, when both interface are up and while doing ifdown with heavy
traffic then skbs already processed by DMA from that slave emac has to be
requeued as still the other interface is up and running.
Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Fix a missing __user annotation in a cast of a user space pointer (found by
checker).
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch adds missing space between "interface" and "by"
in bonding module parameter description.
Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>