this patch does the following:
1 .  remove unnecessary if, else condition
2 .  reduce one variable
3 .  change the return type of 2 functions to void as there return values
turn out to be 0 always after above changes
Signed-off-by: NSaurabh Sengar <saurabh.truth@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Merge tag 'linux-can-next-for-4.5-20151123' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next

Marc Kleine-Budde says:

====================
pull-request: can-next 2015-11-23

this is a pull request of a single patch for net-next/master.

The patch by Kedareswara rao Appana converts the xilinx CAN driver to
runtime_pm.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Commit 09605cc1 ("net ipv4: use preferred log methods") replaced
a few calls of pr_cont() after a console print without a trailing
newline by pr_info(), causing lines to be split during IP
autoconfiguration, like:

    .
    ,
     OK
    IP-Config: Got DHCP answer from 192.168.97.254,
    my address is 192.168.97.44

Convert these back to using pr_cont(), so it prints again:

    ., OK
    IP-Config: Got DHCP answer from 192.168.97.254, my address is 192.168.97.44

Absorb the printing of "my address ..." into the previous call to
pr_info(), as there's no reason to use a continuation there.

Convert one more pr_info() to print nameservers while we're at it.

Fixes: 09605cc1 ("net ipv4: use preferred log methods")
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

After the introduction of the switch gpio reset API, I'm getting
build errors in configurations that disable CONFIG_GPIOLIB:

net/dsa/dsa.c:783:16: error: implicit declaration of function 'gpio_to_desc' [-Werror=implicit-function-declaration]

The reason is that linux/gpio/consumer.h is not automatically
included without gpiolib support. This adds an explicit #include
statement to make it compile in all configurations. The reset
functionality will not work without gpiolib, which is what you
get when disabling the feature.

As far as I can tell, gpiolib is supported on all architectures
on which you can have DSA at the moment.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Fixes: cc30c163 ("net: dsa: Add support for a switch reset gpio")
Acked-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Jeff Kirsher says:

====================
Intel Wired LAN Driver Updates 2015-11-23

This series contains updates to ixgbe, ixgbevf, fm10k, i40e and i40evf.

Jacob fixes an issue where VF could attempt to read queues it does not own,
so prevent this we check queue 0 before we continue.

Matthew fixes the MTU for jumbo frames for fm10k.

Julia Lawall cleans up a unneeded NULL test in ixgbe.

Mark cleans up a redundant header inclusion.  Adds KR mode support for
CS4227 chip.  Cleaned up diagnostic code, which is no longer needed, for
the CS4227 chip.

Jean Sacren fixes kernel documentation for ixgbe.

Alex Duyck fixes an fm10k and ixgbe issue in which the polling routine would
increase the budget for receive to at least 1 per queue if multiple queues were
present.  This would result in receive packets being processed when the budget
was 0 which is meant to indicate that no receive can be handled.  Also fixes
an ixgbevf performance issue where netperf test will starve for memory in the
time form one transmit interrupt to the next, so limit lowest interrupt rate
for adaptive interrupt moderation to 12K.  Fixed up ixgbe and ixgbevf to
use napi_schedule_irqoff() where the drivers were run from hard interrupt
context or with interrupts already disabled in netpoll.

Jesse fixes a compiler warning about an unused variable for i40evf.

John Greene fixes an issue with ixgbevf, where if the VF driver is loaded
while the corresponding PH interface is down, the driver assigns a random
MAC address, can be overwritten with the value of hw->mac.perm_addr which
is 0 at that point.  So avoid this case by initializing hw->mac.perm_addr
to the randomly generated address and do not set it unless we receive an
ACK from ixgbe.

Rasmus Villemoes cleans up some confusing code in i40e debugfs code.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The vmci_transport_notify_ops structures are never modified, so declare
them as const.

Done with the help of Coccinelle.
Signed-off-by: NJulia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The in_cache_ops and eg_cache_ops structures are never modified, so declare
them as const.

Done with the help of Coccinelle.
Signed-off-by: NJulia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Nikolay Aleksandrov says:

====================
net: ipmr: cleanups and minor improvements

Since I'll have to work with ipmr, I decided to clean it up and do some
minor improvements. Functionally there're almost no changes except the
SLAB_PANIC removal. Most of the patches just re-design some functions to
be clearer and more concise and try to remove the ifdef web that was
inside. There's more information in each commit. This is the first set,
the end goal is to introduce complete netlink support and control over
the mfc and vif devices.
I've tried to test all of the setsockopt/getsockopt options, and also
made builds with various ipmr kconfig options turned on and off.

v2: change patch 7 to keep SLAB_PANIC and just drop the unnecessary null
check
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Factor out common vif init code used in both tunnel and pimreg
initialization and create ipmr_init_vif_indev() function.
Signed-off-by: NNikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Take rtnl in the beginning unconditionally as most options already need
it (one exception - MRT_DONE, see the comment inside), make the
lock/unlock places central and move out the switch() local variables.
Signed-off-by: NNikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

It's not necessary to check for null as SLAB_PANIC is used and we'll
panic if the alloc fails, so just drop it.
Signed-off-by: NNikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Trivial replace of ifdef with IS_BUILTIN().
Signed-off-by: NNikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Use a switch to determine if optname is correct and set val accordingly.
This produces a much more straight-forward and readable code.
Signed-off-by: NNikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Trivial code and comment style fixes, also removed some extra newlines,
spaces and tabs.
Signed-off-by: NNikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add the helper pimsm_enabled() which replaces the old CONFIG_IP_PIMSM
define and is used to check if any version of PIM-SM has been enabled.
Use a single if defined(CONFIG_IP_PIMSM_V1) || defined(CONFIG_IP_PIMSM_V2)
for the pim-sm shared code. This is okay w.r.t IGMPMSG_WHOLEPKT because
only a VIFF_REGISTER device can send such packet, and it can't be
created if pimsm_enabled() is false.
Signed-off-by: NNikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Before mroute_reg_vif_num was defined only if any of the CONFIG_PIMSM_
options were set, but that's not really necessary as the size of the
struct is the same in both cases (checked with pahole, both cases size
is 3256 bytes) and we can remove some unnecessary ifdefs to simplify the
code.
Signed-off-by: NNikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Move the table id check in ipmr_new_table and make it return error
pointer. We need this change for the upcoming netlink table manipulation
support in order to avoid code duplication and a race condition.
Signed-off-by: NNikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This code is pretty confused. The variable name 'bytes_not_copied'
clearly indicates that the programmer knew the semantics of
copy_{to,from}_user, but then the return value is checked for being
negative and used as a -Exxx return value.

I'm not sure this is the proper fix, but at least we get rid of the
dead code which pretended to check for access faults.
Signed-off-by: NRasmus Villemoes <linux@rasmusvillemoes.dk>
Acked-by: NShannon Nelson <shannon.nelson@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

If ixgbevf is loaded while the corresponding PF interface is down
and the driver assigns a random MAC address, that address can be
overwritten with the value of hw->mac.perm_addr, which would be 0 at
that point.

To avoid this case we init hw->mac.perm_addr to the randomly generated
address and do not set it unless we receive ACK from ixgbe.
Reported-by: NJohn Greene <jogreene@redhat.com>
Signed-off-by: NEmil Tantilov <emil.s.tantilov@intel.com>
Tested-by: NKrishneil Singh <Krishneil.k.singh@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

replace some instances of memcpy for setting up the mac address with
ether_addr_copy()
Signed-off-by: NEmil Tantilov <emil.s.tantilov@intel.com>
Tested-by: NDarin Miller <darin.j.miller@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Compiler complained of an unused variable, which the driver was just
using to store the result of a rd32 which is used to clear a register
unconditionally.  Just drop the unused variable and re-use one.
Signed-off-by: NJesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Testing has now shown that the diagnostic code used with the CS4227
is no longer needed, so remove it.
Signed-off-by: NMark Rustad <mark.d.rustad@intel.com>
Tested-by: NDarin Miller <darin.j.miller@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

The ixgbe_intr and ixgbe/ixgbevf_msix_clean_rings functions run from hard
interrupt context or with interrupts already disabled in netpoll.

They can use napi_schedule_irqoff() instead of napi_schedule()
Signed-off-by: NAlexander Duyck <aduyck@mirantis.com>
Tested-by: NDarin Miller <darin.j.miller@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This patch is the ixgbevf version of commit 8ac34f10 "ixgbe: Limit
lowest interrupt rate for adaptive interrupt moderation to 12K"

The same logic applies here as well as the same results since a netperf
test will starve for memory in the time from one Tx interrupt to the next.
As a result the ixgbevf driver underperformed when compared to vhost_net.
Signed-off-by: NAlexander Duyck <aduyck@mirantis.com>
Tested-by: NDarin Miller <darin.j.miller@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

KR auto-neg mode is what we will be using going forward. The SW
interface for this mode is different that what was used for iXFI.
Signed-off-by: NMark Rustad <mark.d.rustad@intel.com>
Tested-by: NPhil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This patch corrects an issue in which the polling routine would increase
the budget for Rx to at least 1 per queue if multiple queues were present.
This would result in Rx packets being processed when the budget was 0 which
is meant to indicate that no Rx can be handled.
Signed-off-by: NAlexander Duyck <aduyck@mirantis.com>
Tested-by: NDarin Miller <darin.j.miller@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This patch corrects an issue in which the polling routine would increase
the budget for Rx to at least 1 per queue if multiple queues were present.
This would result in Rx packets being processed when the budget was 0 which
is meant to indicate that no Rx can be handled.
Signed-off-by: NAlexander Duyck <aduyck@mirantis.com>
Tested-by: NKrishneil Singh <Krishneil.k.singh@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

The commit dfaf891d ("ixgbe: Refactor the RSS configuration code")
introduced a few kernel-doc errors:

1) The function name is missing;
2) The format is wrong;
3) The short description is redundant.

Fix all the above for the correct execution of the kernel doc.
Signed-off-by: NJean Sacren <sakiwit@gmail.com>
Tested-by: NDarin Miller <darin.j.miller@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Delete a redundant include of net/vxlan.h.
Signed-off-by: NMark Rustad <mark.d.rustad@intel.com>
Tested-by: NDarin Miller <darin.j.miller@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Remove unneeded NULL test.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@ expression x; @@
-if (x != NULL)
  \(kmem_cache_destroy\|mempool_destroy\|dma_pool_destroy\)(x);
// </smpl>
Signed-off-by: NJulia Lawall <Julia.Lawall@lip6.fr>
Tested-by: NDarin Miller <darin.j.miller@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Based on hardware testing, the host interface supports up to 15368 bytes
as the maximum frame size. To determine the correct MTU, we subtract 8
for the internal switch tag, 14 for the L2 header, and 4 for the
appended FCS header, resulting in 15342 bytes of payload for our maximum
MTU on jumbo frames.
Signed-off-by: NMatthew Vick <matthew.vick@intel.com>
Signed-off-by: NJacob Keller <jacob.e.keller@intel.com>
Acked-by: NBruce Allan <bruce.w.allan@intel.com>
Tested-by: NKrishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

It is possible that the PF has not yet assigned resources to the VF.
Although rare, this could result in the VF attempting to read queues it
does not own and result in FUM or THI faults in the PF. To prevent this,
check queue 0 before we continue in init_hw_vf.
Signed-off-by: NJacob Keller <jacob.e.keller@intel.com>
Tested-by: NKrishneil Singh <Krishneil.k.singh@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Phil Sutter says:

====================
improve fault-tolerance of rhashtable runtime-test

The following series aims to improve lib/test_rhashtable in different
situations:

Patch 1 allows the kernel to reschedule so the test does not block too
        long on slow systems.
Patch 2 fixes behaviour under pressure, retrying inserts in non-permanent
        error case (-EBUSY).
Patch 3 auto-adjusts the upper table size limit according to the number
        of threads (in concurrency test). In fact, the current default is
	already too small.
Patch 4 makes it possible to retry inserts even in supposedly permanent
        error case (-ENOMEM) to expose rhashtable's remaining problem of
	-ENOMEM being not as permanent as it is expected to be.

Changes since v1:
- Introduce insert_retry() which is then used in single-threaded test as
  well.
- Do not retry inserts by default if -ENOMEM was returned.
- Rename the retry counter to be a bit more verbose about what it
  contains.
- Add patch 4 as a debugging aid.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This is rather a hack to expose the current issue with rhashtable to
under high pressure sometimes return -ENOMEM even though system memory
is not exhausted and a consecutive insert may succeed.
Signed-off-by: NPhil Sutter <phil@nwl.cc>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

A maximum table size of 64k entries is insufficient for the multiple
threads test even in default configuration (10 threads * 50000 objects =
500000 objects in total). Since we know how many objects will be
inserted, calculate the max size unless overridden by parameter.

Note that specifying the exact number of objects upon table init won't
suffice as that value is being rounded down to the next power of two -
anticipate this by rounding up to the next power of two in beforehand.
Signed-off-by: NPhil Sutter <phil@nwl.cc>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

After adding cond_resched() calls to threadfunc(), a surprisingly high
rate of insert failures occurred probably due to table resizes getting a
better chance to run in background. To not soften up the remaining
tests, retry inserts until they either succeed or fail permanently.

Also change the non-threaded test to retry insert operations, too.
Suggested-by: NThomas Graf <tgraf@suug.ch>
Signed-off-by: NPhil Sutter <phil@nwl.cc>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This should fix for soft lockup bugs triggered on slow systems.
Signed-off-by: NPhil Sutter <phil@nwl.cc>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Andrew Lunn says:

====================
DSA: GPIO to reset switches

These two patches add support for using a GPIO to hard reset a switch
during reset.

v2:

Thanks to a clue from Neil Armstrong, i figured out how to convert the
gpio into a gpiod, while keeping the ACTIVE_LOW flag, so simplifiying
the set/reset code.

I have not included the Tested-by: from Phil Reid, since i made a lot
of changes.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The device tree binding now allows a gpio to be specified which is
attached to the switch chips reset line. If it is defined, perform
a hardware reset on the switch during setup.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Some boards have a gpio line tied to the switch reset pin. Allow this
gpio to be retrieved from the device tree, and take the switch out of
reset before performing the probe.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>