net: cdc_ncm: remove redundant "disconnected" flag

Calling netif_carrier_{on,off} is sufficient.  There is no need
to duplicate the carrier state in a driver specific flag.

Acked-by: Enrico Mioso <mrkiko.rs@gmail.com>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
net: cdc_ncm: do not start timer on an empty skb

We can end up with a freshly allocated tx_curr_skb with no frames
in it.  In this case it does not make any sense to start the timer.
This avoids the timer periodically trying to start tx when there
is nothing in the queue.

Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
Merge branch 'cdc_ncm-coalesce'

Bjørn Mork says:

====================
cdc_ncm: add buffer tuning and stats using ethtool

Quoting the previous description of this series (skip to the
changelog below if you only want a summary of the changes):

"I have got quite a few reports from frustrated users of OpenWRT
hosts trying to use some powerful LTE modem, but not achieving
full speed.  This is typically caused by a combination of
big buffers and little memory, giving in allocation errors and
bad performance as a result.

This series is an attempt to let users adjust the size of these
buffers without having to rebuild the driver.

Patches 1 - 4 are mostly rearranging existing code, in preparing
for the dynamic buffer size changes.

Patch 5 adds userspace control (ab)using the ethtool coalescing
API. This isn't a perfect match, which is the main reason why I
post this series as a RFC.

Patch 6 is an unrelated framing optimization, reducing the
overhead quite a bit and allowing for better use of smaller
buffers.

Patch 7 changes the way we calculate frame padding cutoff. The
problem with big buffers is made much worse by the current padding
strategy where zero padding often can account for more than 90% of
the frames.

Patch 8 add some counters giving some insight into how well the
NCM/MBIM protocol works, supporting further tuning.

Patch 9 reduce the initial maximum buffer size from 32kB to 16kB
in an attempt to make the default better suit all. It is still
possible to tune this up again to the old fixed max, using the
new tuning knobs.

I must admit that I had higher hopes for this series before I
tested it on my own modems.  One really unexpected result was
that one of the MBIM modems accepted the new rx buffer size we
set, but happily continued sending buffers of the same size as
before.  Needless to say:  This did not work very well...

So don't really expect to be able to use any values with any
given device. Firmware implementations are still... I don't
think I have words suitable for a public mailing list.

But I am hoping this will help the many users who have had success
rebuilding the driver with lower fixed limits.

Please test and/or comment!"

Changes:

** RFC -> v1 **

Patch 10 - a follow-up to a comment Joe Perches made in November
           2013.  I don't always forget :-)
Patch 11 - removes the redundant "connected" driver state, and the
           associated .check_connect callbacks.

** v1 -> v2 **

Patch 1  - Better handling of minium rx buffer size, based on feedback
           from Oliver Neukum and Enrico Mioso
Patch 5  - fixed locking around timer interval update
Patch 9  - fixed whitespace error
Patch 12 - new fix related to the tuneable tx timer

...and spelling fixes all over the commit messages.  I have finally
added a spelling hook, which I'm sure may of you will appreciate :-)
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
batman-adv: add blank line between declarations and the rest of the code

Reported by checkpatch with the following message:
"WARNING: Missing a blank line after declarations"

Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
batman-adv: remove semi-colon after macro definition

Reported by checkpatch with the following warning:
"WARNING: macros should not use a trailing semicolon"

Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
batman-adv: Start new development cycle

Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
net: bridge: fix build

fix build when BRIDGE_VLAN_FILTERING is not set

Fixes: 2796d0c648c94 ("bridge: Automatically manage port promiscuous mode")

Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
ethtool: Return immediately on error in ethtool_copy_validate_indir()

We must return -EFAULT immediately rather than continuing into
the loop.

Similarly, we may as well return -EINVAL directly.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
ethtool: Name the 'no change' value for setting RSS hash key but not indir table

We usually allocate special values of u32 fields starting from the top
down, so also change the value to 0xffffffff.  As these operations
haven't been included in a stable release yet, it's not too late to
change.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
ethtool: Improve explanation of the two arrays following struct ethtool_rxfh

The use of two variable-length arrays is unusual so deserves a bit
more explanation.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
ethtool: Expand documentation of ethtool_ops::{get,set}_rxfh()

Some corner-cases are not explained properly.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
ethtool: Disallow ETHTOOL_SRSSH with both indir table and hash key unchanged

This would be a no-op, so there is no reason to request it.

This also allows conversion of the current implementations of
ethtool_ops::{get,set}_rxfh_indir to ethtool_ops::{get,set}_rxfh
with no change other than their parameters.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
ethtool, be2net: constify array pointer parameters to ethtool_ops::set_rxfh

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
bridge: fix spelling of promiscuous

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
ipv4: minor spelling fix

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/mlx4_en: Fix uninitialized use of 'port_up' in mlx4_en_set_channels()

Function mlx4_en_set_channels() stops running ports before performing the
requested action. In that case local variable 'port_up' is set so that the
port is restarted at the end of the function, however, in case the port was
not stopped, variable 'port_up' is left uninitialized and the behaviour is
undetermined. Detected by Coverity - CID 751497.

Signed-off-by: Christian Engelmayer <cengelma@gmx.at>
Acked-By: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net: 8390: use time_after() for time comparison

To be future-proof and for better readability the time comparisons are modified
to use time_after() instead of raw math.

Signed-off-by: Manuel Schölling <manuel.schoelling@gmx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
net: rds: Use time_after() for time comparison

To be future-proof and for better readability the time comparisons are modified
to use time_after() instead of raw math.

Signed-off-by: Manuel Schölling <manuel.schoelling@gmx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
net: ethernet: ibm: ehea: ehea_qmr.c: Fix for possible null pointer dereference

There is otherwise a risk of a possible null pointer dereference.

Was largely found by using a static code analysis program called cppcheck.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Signed-off-by: David S. Miller <davem@davemloft.net>
Merge tag 'batman-adv-for-davem' of git://git.open-mesh.org/linux-merge

Included changes:
- fix codestyle to respect new checkpatch warnings
- increase internal version number