cascardo/linux.git
8 years agomac80211: Deinline drv_conf_tx()
Denys Vlasenko [Fri, 18 Sep 2015 13:19:34 +0000 (15:19 +0200)]
mac80211: Deinline drv_conf_tx()

With this .config: http://busybox.net/~vda/kernel_config_ALLYES_Os,
after deinlining the function size is 785 bytes and there are
7 callsites.

Total size reduction is about 3.5 kbytes.

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
CC: John Linville <linville@tuxdriver.com>
CC: Michal Kazior <michal.kazior@tieto.com>
CC: Johannes Berg <johannes.berg@intel.com>
CC: linux-wireless@vger.kernel.org
CC: linux-kernel@vger.kernel.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
8 years agomac80211: Copy tx'ed beacons to monitor mode
Helmut Schaa [Wed, 9 Sep 2015 07:46:32 +0000 (09:46 +0200)]
mac80211: Copy tx'ed beacons to monitor mode

When debugging wireless powersave issues on the AP side it's quite helpful
to see our own beacons that are transmitted by the hardware/driver. However,
this is not that easy since beacons don't pass through the regular TX queues.

Preferably drivers would call ieee80211_tx_status also for tx'ed beacons
but that's not always possible. Hence, just send a copy of each beacon
generated by ieee80211_beacon_get_tim to monitor devices when they are
getting fetched by the driver.

Also add a HW flag IEEE80211_HW_BEACON_TX_STATUS that can be used by
drivers to indicate that they report TX status for beacons.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
(with a fix from Christian Lamparted rolled in)
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
8 years agoRevert "mac80211: add pointer for driver use to key"
Johannes Berg [Mon, 14 Sep 2015 11:56:17 +0000 (13:56 +0200)]
Revert "mac80211: add pointer for driver use to key"

This reverts commit f9a060f4b2003eb7350762e60dfc576447e44bad.

No driver has turned up needing this functionality, and I've just
implemented the functionality I wanted this for in a different
way. Thus, remove it again, until somebody shows up with a need
for having it.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
8 years agomac80211: Split sending tx'ed frames to monitor interfaces into its own function
Helmut Schaa [Wed, 2 Sep 2015 11:23:30 +0000 (13:23 +0200)]
mac80211: Split sending tx'ed frames to monitor interfaces into its own function

This allows ieee80211_tx_monitor to be used directly for sending 802.11 frames
to all monitor interfaces.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
8 years agonl80211: put current TX power in interface info
Rafał Miłecki [Mon, 31 Aug 2015 20:59:38 +0000 (22:59 +0200)]
nl80211: put current TX power in interface info

Many drivers implement reading current TX power (using either cfg80211
or ieee80211 op) but userspace can't get it using nl80211. Right now the
only way to access it is to call some wext ioctl.
Let's put TX power in interface info reply (callback is wdev specific)
just like we do with current channel.
To be consistent (e.g. NL80211_CMD_SET_WIPHY) let's use mBm as na unit.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
8 years agowireless: mark element IDs 8 and 9 reserved
Johannes Berg [Fri, 28 Aug 2015 12:31:48 +0000 (14:31 +0200)]
wireless: mark element IDs 8 and 9 reserved

These were never used in the tree, and are marked as reserved
in the IEEE 802.11 documentation (ANA).

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
8 years agomac80211: use DECLARE_EWMA for ave_beacon_signal
Johannes Berg [Fri, 28 Aug 2015 08:52:54 +0000 (10:52 +0200)]
mac80211: use DECLARE_EWMA for ave_beacon_signal

It doesn't seem problematic to change the weight for the average
beacon signal from 3 to 4, so use DECLARE_EWMA. This also makes
the code easier to maintain since bugs like the one fixed in the
previous patch can't happen as easily.

With a fix from Avraham Stern to invert the sign since EMWA uses
unsigned values only.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
8 years agomac80211: fix driver RSSI event calculations
Johannes Berg [Fri, 28 Aug 2015 08:52:53 +0000 (10:52 +0200)]
mac80211: fix driver RSSI event calculations

The ifmgd->ave_beacon_signal value cannot be taken as is for
comparisons, it must be divided by since it's represented
like that for better accuracy of the EWMA calculations. This
would lead to invalid driver RSSI events. Fix the used value.

Fixes: 615f7b9bb1f8 ("mac80211: add driver RSSI threshold events")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
8 years agomac80211: remove last_beacon/ave_beacon debugfs files
Johannes Berg [Fri, 28 Aug 2015 08:52:52 +0000 (10:52 +0200)]
mac80211: remove last_beacon/ave_beacon debugfs files

These file aren't really useful:
 - if per beacon data is required then you need to use
   radiotap or similar anyway, debugfs won't help much
 - average beacon signal is reported in station info in
   nl80211 and can be looked up with iw

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
8 years agomac80211: implement VHT support for mesh
Bob Copeland [Thu, 27 Aug 2015 13:00:18 +0000 (09:00 -0400)]
mac80211: implement VHT support for mesh

Implement the basics required for supporting very high throughput
with mesh: include VHT information elements in beacons, probe
responses, and peering action frames, and check for compatible VHT
configurations when peering.

Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
8 years agomac80211: zero center freq segment 2 in VHT oper IE
Chun-Yeow Yeoh [Fri, 4 Sep 2015 02:58:05 +0000 (10:58 +0800)]
mac80211: zero center freq segment 2 in VHT oper IE

Clear the Channel Center Frequency Segment 2 in VHT operation
IEs to avoid sending non-zero values if the SKB wasn't zeroed
before adding the VHT operation IE.

Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@gmail.com>
[change commit message a bit - not necessarily just mesh related]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
8 years agomac80211: allow the driver to advertise A-MSDU within A-MPDU Rx support
Emmanuel Grumbach [Sat, 15 Aug 2015 19:39:51 +0000 (22:39 +0300)]
mac80211: allow the driver to advertise A-MSDU within A-MPDU Rx support

Drivers may be interested in receiving A-MSDU within A-MDPU.
Not all the devices may be able to do so, make it configurable.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
8 years agomac80211: remove direct probe step before authentication
Johannes Berg [Sat, 15 Aug 2015 19:39:54 +0000 (22:39 +0300)]
mac80211: remove direct probe step before authentication

The direct probe step before authentication was done mostly for
two reasons:
 1) the BSS data could be stale
 2) the beacon might not have included all IEs

The concern (1) doesn't really seem to be relevant any more as
we time out BSS information after about 30 seconds, and in fact
the original patch only did the direct probe if the data was
older than the BSS timeout to begin with. This condition got
(likely inadvertedly) removed later though.

Analysing this in more detail shows that since we mostly use
data from the association response, the only real reason for
needing the probe response was that the code validates the WMM
parameters, and those are optional in beacons. As the previous
patches removed that behaviour, we can now remove the direct
probe step entirely.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
8 years agomac80211: allow to transmit A-MSDU within A-MPDU
Emmanuel Grumbach [Sun, 16 Aug 2015 08:13:22 +0000 (11:13 +0300)]
mac80211: allow to transmit A-MSDU within A-MPDU

Advertise the capability to send A-MSDU within A-MPDU
in the AddBA request sent by mac80211. Let the driver
know about the peer's capabilities.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
8 years agomac80211: introduce per vif frame registration API
Andrei Otcheretianski [Sat, 15 Aug 2015 19:39:50 +0000 (22:39 +0300)]
mac80211: introduce per vif frame registration API

Currently the cfg80211's frame registration api receives wdev, however
mac80211 assumes per device filter configuration and ignores wdev.
Per device filtering is too wasteful, especially for multi-channel
devices.
Introduce new per vif frame registration API and use it for probe
request registrations in ieee80211_mgmt_frame_register()
Also call directly to ieee80211_configure_filter instead of using a work
since it is now allowed to sleep in ieee80211_mgmt_frame_register.

Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
8 years agonl80211: support vendor dumpit commands
Johannes Berg [Sat, 15 Aug 2015 19:39:49 +0000 (22:39 +0300)]
nl80211: support vendor dumpit commands

In order to transfer many items in vendor commands, support the
dumpit netlink method for them.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
8 years agomac80211: TDLS: check reg with IR-relax on chandef upgrade
Arik Nemtsov [Sat, 15 Aug 2015 19:39:48 +0000 (22:39 +0300)]
mac80211: TDLS: check reg with IR-relax on chandef upgrade

When checking if a TDLS chandef can be upgraded, IR-relaxation can be
taken into account to allow more channels.

Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
8 years agomac80211: debugfs: add file to disallow TDLS wider-bw
Arik Nemtsov [Sat, 15 Aug 2015 19:39:46 +0000 (22:39 +0300)]
mac80211: debugfs: add file to disallow TDLS wider-bw

Sometimes we are interested in testing TDLS performance in a specific
width setting. Add the ability to disable the wider-band feature, thereby
allowing the TDLS channel width to be controlled by the BSS width.

Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
8 years agomac80211: process skb_queue while scanning in HW
Andrei Otcheretianski [Sat, 15 Aug 2015 19:04:01 +0000 (22:04 +0300)]
mac80211: process skb_queue while scanning in HW

Queued frames aren't processed during scan, which results in an inability
to complete the BA session establishment until the scan ends. Since we
can't tx frames until the BA agreement setup is complete, it might result
in a very large latency during scan.
Fix this by allowing to process queued skbs while scanning in HW. This
should be ok since the devices which support hw scan should be able
to handle tx/rx while scanning.
During SW scan, mac80211 drops any txed frames besides probes and NDPs,
so it is still needed to delay processing of the queued frames till the
SW scan is done.

Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
8 years agowireless: make __freq_reg_info static
Johannes Berg [Fri, 21 Aug 2015 12:13:06 +0000 (14:13 +0200)]
wireless: make __freq_reg_info static

As pointed out by sparse, this symbol should be static, make it so.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
8 years agoMerge tag 'wireless-drivers-next-for-davem-2015-08-26' of git://git.kernel.org/pub...
David S. Miller [Thu, 27 Aug 2015 18:25:56 +0000 (11:25 -0700)]
Merge tag 'wireless-drivers-next-for-davem-2015-08-26' of git://git./linux/kernel/git/kvalo/wireless-drivers-next

Kalle Valo says:

====================
Major changes:

iwlwifi:

* new Tx power firmware API
* bump max firmware API to 17
* fix bug in debug prints
* static checker fix
* fix unused defines
* fix command list on newest firmware

brcmfmac:

* support NVRAM loading for bcm47xx platform
* new debugfs entry for msgbuf protocol layer used with PCIe devices

ath10k:

* add spectral scan support for qca99x0
* add qca6164 support
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agobpf: fix bpf_skb_set_tunnel_key() helper
Alexei Starovoitov [Wed, 26 Aug 2015 22:57:38 +0000 (15:57 -0700)]
bpf: fix bpf_skb_set_tunnel_key() helper

Make sure to indicate to tunnel driver that key.tun_id is set,
otherwise gre won't recognize the metadata.

Fixes: d3aa45ce6b94 ("bpf: add helpers to access tunnel metadata")
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'act_bpf_lockless'
David S. Miller [Wed, 26 Aug 2015 18:01:45 +0000 (11:01 -0700)]
Merge branch 'act_bpf_lockless'

Alexei Starovoitov says:

====================
act_bpf: remove spinlock in fast path

v1 version had a race condition in cleanup path of bpf_prog.
I tried to fix it by adding new callback 'cleanup_rcu' to 'struct tcf_common'
and call it out of act_api cleanup path, but Daniel noticed
(thanks for the idea!) that most of the classifiers already do action cleanup
out of rcu callback.
So instead this set of patches converts tcindex and rsvp classifiers to call
tcf_exts_destroy() after rcu grace period and since action cleanup logic
in __tcf_hash_release() is only called when bind and refcnt goes to zero,
it's guaranteed that cleanup() callback is called from rcu callback.
More specifically:
patches 1 and 2 - simple fixes
patches 2 and 3 - convert tcf_exts_destroy in tcindex and rsvp to call_rcu
patch 5 - removes spin_lock from act_bpf

The cleanup of actions is now universally done after rcu grace period
and in the future we can drop (now unnecessary) call_rcu from tcf_hash_destroy()
patch 5 is using synchronize_rcu() in act_bpf replacement path, since it's
very rare and alternative of dynamically allocating 'struct tcf_bpf_cfg' just
to pass it to call_rcu looks even less appealing.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet_sched: act_bpf: remove spinlock in fast path
Alexei Starovoitov [Wed, 26 Aug 2015 03:06:35 +0000 (20:06 -0700)]
net_sched: act_bpf: remove spinlock in fast path

Similar to act_gact/act_mirred, act_bpf can be lockless in packet processing
with extra care taken to free bpf programs after rcu grace period.
Replacement of existing act_bpf (very rare) is done with synchronize_rcu()
and final destruction is done from tc_action_ops->cleanup() callback that is
called from tcf_exts_destroy()->tcf_action_destroy()->__tcf_hash_release() when
bind and refcnt reach zero which is only possible when classifier is destroyed.
Previous two patches fixed the last two classifiers (tcindex and rsvp) to
call tcf_exts_destroy() from rcu callback.

Similar to gact/mirred there is a race between prog->filter and
prog->tcf_action. Meaning that the program being replaced may use
previous default action if it happened to return TC_ACT_UNSPEC.
act_mirred race betwen tcf_action and tcfm_dev is similar.
In all cases the race is harmless.
Long term we may want to improve the situation by replacing the whole
tc_action->priv as single pointer instead of updating inner fields one by one.

Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet_sched: convert rsvp to call tcf_exts_destroy from rcu callback
Alexei Starovoitov [Wed, 26 Aug 2015 03:06:34 +0000 (20:06 -0700)]
net_sched: convert rsvp to call tcf_exts_destroy from rcu callback

Adjust destroy path of cls_rsvp to call tcf_exts_destroy() after
rcu grace period.

Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet_sched: convert tcindex to call tcf_exts_destroy from rcu callback
Alexei Starovoitov [Wed, 26 Aug 2015 03:06:33 +0000 (20:06 -0700)]
net_sched: convert tcindex to call tcf_exts_destroy from rcu callback

Adjust destroy path of cls_tcindex to call tcf_exts_destroy() after
rcu grace period.

Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet_sched: act_bpf: remove unnecessary copy
Alexei Starovoitov [Wed, 26 Aug 2015 03:06:32 +0000 (20:06 -0700)]
net_sched: act_bpf: remove unnecessary copy

Fix harmless typo and avoid unnecessary copy of empty 'prog' into
unused 'strcut tcf_bpf_cfg old'.

Fixes: f4eaed28c783 ("act_bpf: fix memory leaks when replacing bpf programs")
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet_sched: make tcf_hash_destroy() static
Alexei Starovoitov [Wed, 26 Aug 2015 03:06:31 +0000 (20:06 -0700)]
net_sched: make tcf_hash_destroy() static

tcf_hash_destroy() used once. Make it static.

Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agolib/Makefile: remove CONFIG_AVERAGE build rule
Valentin Rothberg [Wed, 26 Aug 2015 13:36:12 +0000 (15:36 +0200)]
lib/Makefile: remove CONFIG_AVERAGE build rule

The Kconfig option AVERAGE and its implementation has been removed by
commit f4e774f55fe0 ("average: remove out-of-line implementation").
Remove the dead build rule in lib/Makefile.

Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge ath-next from ath.git
Kalle Valo [Wed, 26 Aug 2015 09:40:23 +0000 (12:40 +0300)]
Merge ath-next from ath.git

Major changes in ath10k:

* add spectral scan support for qca99x0
* add qca6164 support

8 years agoath10k: fix compilation warnings in wmi phyerr pull function
Raja Mani [Fri, 21 Aug 2015 13:12:36 +0000 (18:42 +0530)]
ath10k: fix compilation warnings in wmi phyerr pull function

Below compilation warnings are observed in gcc version 4.8.2.
Even though it's not seen in bit older gcc versions (for ex, 4.7.3),
It's good to fix it by changing format specifier from %d to
%zd in wmi pull phyerr functions.

wmi.c: In function 'ath10k_wmi_op_pull_phyerr_ev':
wmi.c:3567:8: warning: format '%d' expects argument of type 'int',
              but argument 4 has type 'long unsigned int' [-Wformat=]
              left_len, sizeof(*phyerr));
                        ^
wmi.c: In function 'ath10k_wmi_10_4_op_pull_phyerr_ev':
wmi.c:3612:8: warning: format '%d' expects argument of type 'int',
      but argument 4 has type 'long unsigned int' [-Wformat=]
              left_len, sizeof(*phyerr));
                        ^
Fixes: 991adf71a6cd ("ath10k: refactor phyerr event handlers")
Fixes: 2b0a2e0d7c2f ("ath10k: handle 10.4 firmware phyerr event")
Signed-off-by: Raja Mani <rmani@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
8 years agoath10k: add qca6164 support
Michal Kazior [Thu, 13 Aug 2015 12:32:26 +0000 (14:32 +0200)]
ath10k: add qca6164 support

This adds additional 0x0041 PCI Device ID
definition to ath10k for QCA6164 which is a 1
spatial stream sibling of the QCA6174 (which is 2
spatial stream chip).

The QCA6164 needs a dedicated board.bin file which
is different than the one used for QCA6174. If the
board.bin is wrong the device will crash early
while trying to boot firmware. The register dump
will look like this:

 ath10k_pci 0000:02:00.0: firmware register dump:
 ath10k_pci 0000:02:00.0: [00]: 0x05010000 0x000015B3 0x000A012D 0x00955B31
 ...

Note the value 0x000A012D.

Special credit goes to Alan Liu
<alanliu@qca.qualcomm.com> for providing support
help which enabled me to come up with this patch.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
8 years agoath10k: add spectral scan support for 10.4 fw
Raja Mani [Thu, 20 Aug 2015 04:59:05 +0000 (10:29 +0530)]
ath10k: add spectral scan support for 10.4 fw

To enable/configure spectral scan parameters in 10.4 firmware, existing
wmi spectral related functions can be reused. Link those functions in
10.4 wmi ops table.

In addition, adjust bin size (only when size is 68 bytes) before reporting
bin samples to user space. The background for this adjustment is that
qca99x0 reports bin size as 68 bytes (64 bytes + 4 bytes) in report
mode 2. First 64 bytes carries in-band tones (-32 to +31) and last 4 byte
carries band edge detection data (+32) mainly used in radar detection
purpose. Additional last 4 bytes are stripped to make bin size valid one.

This bin size adjustment will happen only for qca99x0, all other chipsets
will report proper bin sizes (64/128) without extra 4 bytes being added
at the end. The changes are validated in qca99x0 using 10.4 firmware.

Signed-off-by: Raja Mani <rmani@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
8 years agoath10k: fix dma_mapping_error() handling
Michal Kazior [Wed, 19 Aug 2015 11:10:43 +0000 (13:10 +0200)]
ath10k: fix dma_mapping_error() handling

The function returns 1 when DMA mapping fails. The
driver would return bogus values and could
possibly confuse itself if DMA failed.

Fixes: 767d34fc67af ("ath10k: remove DMA mapping wrappers")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
8 years agoath10k: add missing mutex unlock on failpath
Michal Kazior [Wed, 19 Aug 2015 11:08:53 +0000 (13:08 +0200)]
ath10k: add missing mutex unlock on failpath

Kernel would complain about leaving a held lock
after going back to userspace and would
subsequently deadlock.

Fixes: e04cafbc38c7 ("ath10k: fix peer limit enforcement")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
8 years agoMerge branch 'dsa-docs'
David S. Miller [Wed, 26 Aug 2015 00:01:33 +0000 (17:01 -0700)]
Merge branch 'dsa-docs'

Florian Fainelli says:

====================
Documentation: dsa

This patch series adds some documentation about DSA as a subsystem as well
as the SF2 driver since it slightly diverges from your average DSA driver ;)
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoDocumentation: networking: dsa: Add Broadcom SF2 document
Florian Fainelli [Tue, 25 Aug 2015 22:33:14 +0000 (15:33 -0700)]
Documentation: networking: dsa: Add Broadcom SF2 document

Add a document describing the Broadcom Starfigther 2 switch hardware,
its specifics, and how the driver is implemented and its specifics.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoDocumentation: networking: add a DSA document
Florian Fainelli [Tue, 25 Aug 2015 22:33:13 +0000 (15:33 -0700)]
Documentation: networking: add a DSA document

Describe how the DSA subsystem works, its design principles,
limitations, and describe in details how to implement a DSA switch
driver.

Acked-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Scott Feldman <sfeldma@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'rds-more-fixes'
David S. Miller [Tue, 25 Aug 2015 23:28:11 +0000 (16:28 -0700)]
Merge branch 'rds-more-fixes'

Santosh Shilimkar says:

====================
RDS: Few more fixes

As indicated in the earlier series [1], this is a follow-up series which
addresses few issues around the RDS FMR code. With [1] and the subject
series, now I can run many parallel threads with multiple sockets with
N x N traffic. The stress tests has survived overnight runs.

[1] https://lkml.org/lkml/2015/8/22/127
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: remove superfluous from rds_ib_alloc_fmr()
santosh.shilimkar@oracle.com [Tue, 25 Aug 2015 19:02:03 +0000 (12:02 -0700)]
RDS: remove superfluous from rds_ib_alloc_fmr()

Memory allocated for 'ibmr' uses kzalloc_node() which already
initialises the memory to zero. There is no need to do
memset() 0 on that memory.

Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: flush the FMR pool less often
santosh.shilimkar@oracle.com [Tue, 25 Aug 2015 19:02:02 +0000 (12:02 -0700)]
RDS: flush the FMR pool less often

FMR flush is an expensive and time consuming operation. Reduce the
frequency of FMR pool flush by 50% so that more FMR work gets accumulated
for more efficient flushing.

Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: push FMR pool flush work to its own worker
santosh.shilimkar@oracle.com [Tue, 25 Aug 2015 19:02:01 +0000 (12:02 -0700)]
RDS: push FMR pool flush work to its own worker

RDS FMR flush operation and also it races with connect/reconect
which happes a lot with RDS. FMR flush being on common rds_wq aggrevates
the problem. Lets push RDS FMR pool flush work to its own worker.

Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: fix fmr pool dirty_count
Wengang Wang [Tue, 25 Aug 2015 19:02:00 +0000 (12:02 -0700)]
RDS: fix fmr pool dirty_count

In rds_ib_flush_mr_pool(), dirty_count accounts the clean ones
which is wrong. This can lead to a negative dirty count value.

Lets fix it.

Signed-off-by: Wengang Wang <wen.gang.wang@oracle.com>
Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: Fix rds MR reference count in rds_rdma_unuse()
santosh.shilimkar@oracle.com [Tue, 25 Aug 2015 19:01:59 +0000 (12:01 -0700)]
RDS: Fix rds MR reference count in rds_rdma_unuse()

rds_rdma_unuse() drops the mr reference count which it hasn't
taken. Correct way of removing mr is to remove mr from the tree
and then rdma_destroy_mr() it first, then rds_mr_put() to decrement
its reference count. Whichever thread holds last reference will free
the mr via rds_mr_put()

This bug was triggering weird null pointer crashes. One if the trace
for it is captured below.

BUG: unable to handle kernel NULL pointer dereference at
0000000000000104
IP: [<ffffffffa0899471>] rds_ib_free_mr+0x31/0x130 [rds_rdma]
PGD 4366fa067 PUD 4366f9067 PMD 0
Oops: 0000 [#1] SMP

[...]

task: ffff88046da6a000 ti: ffff88046da6c000 task.ti: ffff88046da6c000
RIP: 0010:[<ffffffffa0899471>]  [<ffffffffa0899471>]
rds_ib_free_mr+0x31/0x130 [rds_rdma]
RSP: 0018:ffff88046fa43bd8  EFLAGS: 00010286
RAX: 0000000071d38b80 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff880079e7ff40
RBP: ffff88046fa43bf8 R08: 0000000000000000 R09: 0000000000000000
R10: ffff88046fa43ca8 R11: ffff88046a802ed8 R12: ffff880079e7fa40
R13: 0000000000000000 R14: ffff880079e7ff40 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88046fa40000(0000)
knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000104 CR3: 00000004366fb000 CR4: 00000000000006e0
Stack:
 ffff880079e7fa40 ffff880671d38f08 ffff880079e7ff40 0000000000000296
 ffff88046fa43c28 ffffffffa087a38b ffff880079e7fa40 ffff880671d38f10
 0000000000000000 0000000000000292 ffff88046fa43c48 ffffffffa087a3b6
Call Trace:
 <IRQ>
 [<ffffffffa087a38b>] rds_destroy_mr+0x8b/0xa0 [rds]
 [<ffffffffa087a3b6>] __rds_put_mr_final+0x16/0x30 [rds]
 [<ffffffffa087a492>] rds_rdma_unuse+0xc2/0x120 [rds]
 [<ffffffffa08766d3>] rds_recv_incoming_exthdrs+0x83/0xa0 [rds]
 [<ffffffffa0876782>] rds_recv_incoming+0x92/0x200 [rds]
 [<ffffffffa0895269>] rds_ib_process_recv+0x259/0x320 [rds_rdma]
 [<ffffffffa08962a8>] rds_ib_recv_tasklet_fn+0x1a8/0x490 [rds_rdma]
 [<ffffffff810dcd78>] ? __remove_hrtimer+0x58/0x90
 [<ffffffff810799e1>] tasklet_action+0xb1/0xc0
 [<ffffffff81079b52>] __do_softirq+0xe2/0x290
 [<ffffffff81079df6>] irq_exit+0xa6/0xb0
 [<ffffffff81613915>] do_IRQ+0x65/0xf0
 [<ffffffff816118ab>] common_interrupt+0x6b/0x6b

Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: fix the dangling reference to rds_ib_incoming_slab
santosh.shilimkar@oracle.com [Tue, 25 Aug 2015 19:01:58 +0000 (12:01 -0700)]
RDS: fix the dangling reference to rds_ib_incoming_slab

On rds_ib_frag_slab allocation failure, ensure rds_ib_incoming_slab
is not pointing to the detsroyed memory.

Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge tag 'batman-adv-for-davem' of git://git.open-mesh.org/linux-merge
David S. Miller [Tue, 25 Aug 2015 23:20:38 +0000 (16:20 -0700)]
Merge tag 'batman-adv-for-davem' of git://git.open-mesh.org/linux-merge

Antonio Quartulli says:

====================
Included changes:
- code restyling and beautification
- use int kernel types instead of C99
- update kereldoc
- prevent potential hlist double deletion of VLAN objects
- fix gw bandwidth calculation
- convert list to hlist when needed
- add lockdep_asserts calls in function with lock requirements
  described in kerneldoc
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoenic: reduce ioread in devcmd2
Govindarajulu Varadarajan [Tue, 25 Aug 2015 08:45:11 +0000 (14:15 +0530)]
enic: reduce ioread in devcmd2

posted_index is RO in firmware. We need not do ioread everytime to get
posted index. Store posted index locally.

Signed-off-by: Govindarajulu Varadarajan <_govind@gmx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agor8169: Add values missing in @get_stats64 from HW counters
Corinna Vinschen [Mon, 24 Aug 2015 10:52:39 +0000 (12:52 +0200)]
r8169: Add values missing in @get_stats64 from HW counters

The r8169 driver collects statistical information returned by
@get_stats64 by counting them in the driver itself, even though many
(but not all) of the values are already collected by tally counters
(TCs) in the NIC.  Some of these TC values are not returned by
@get_stats64.  Especially the received multicast packages are missing
from /proc/net/dev.

Rectify this by fetching the TCs and returning them from
rtl8169_get_stats64.

The counters collected in the driver obviously disappear as soon as the
driver is unloaded so after a driver is loaded the counters always start
at 0. The TCs on the other hand are only reset by a power cycle.  Without
further considerations the values collected by the driver would not match
up against the TC values.

This patch introduces a new function rtl8169_reset_counters which
resets the TCs.  Also, since rtl8169_reset_counters shares most of
its code with rtl8169_update_counters, refactor the shared code into
two new functions  rtl8169_map_counters and rtl8169_unmap_counters.

Unfortunately chip versions prior to RTL_GIGA_MAC_VER_19 don't allow
to reset the TCs programatically.  Therefore introduce an addition to
the rtl8169_private struct and a function rtl8169_init_counter_offsets
to store the TCs at first rtl_open.  Use these values as offsets in
rtl8169_get_stats64.  Propagate a failure to reset *and* update the
counters up to rtl_open and emit a warning message, if so.

Signed-off-by: Corinna Vinschen <vinschen@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agords: Fix improper gfp_t usage.
David S. Miller [Tue, 25 Aug 2015 22:54:25 +0000 (15:54 -0700)]
rds: Fix improper gfp_t usage.

>> net/rds/ib_recv.c:382:28: sparse: incorrect type in initializer (different base types)
   net/rds/ib_recv.c:382:28:    expected int [signed] can_wait
   net/rds/ib_recv.c:382:28:    got restricted gfp_t
   net/rds/ib_recv.c:828:23: sparse: cast to restricted __le64

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMAINTAINERS: update vmxnet3 driver maintainer
Shrikrishna Khare [Mon, 24 Aug 2015 21:24:11 +0000 (14:24 -0700)]
MAINTAINERS: update vmxnet3 driver maintainer

Shreyas Bhatewara would no longer maintain the vmxnet3 driver. Taking over
the role of vmxnet3 maintainer.

Signed-off-by: Shrikrishna Khare <skhare@vmware.com>
Signed off-by: Shreyas Bhatewara <sbhatewara@vmware.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agovxlan: fix multiple inclusion of vxlan.h
Jiri Benc [Tue, 25 Aug 2015 16:36:50 +0000 (18:36 +0200)]
vxlan: fix multiple inclusion of vxlan.h

The vxlan_get_sk_family inline function was added after the last #endif,
making multiple inclusion of net/vxlan.h fail. Move it to the proper place.

Reported-by: Mark Rustad <mark.d.rustad@intel.com>
Fixes: 705cc62f6728c ("vxlan: provide access function for vxlan socket address family")
Signed-off-by: Jiri Benc <jbenc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMAINTAINERS: Add VRF entry
David Ahern [Tue, 25 Aug 2015 17:26:22 +0000 (10:26 -0700)]
MAINTAINERS: Add VRF entry

Add entry for new VRF device driver.

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoroute: fix a use-after-free
WANG Cong [Tue, 25 Aug 2015 17:38:53 +0000 (10:38 -0700)]
route: fix a use-after-free

This patch fixes the following crash:

 general protection fault: 0000 [#1] SMP DEBUG_PAGEALLOC
 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.2.0-rc7+ #166
 Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
 task: ffff88010656d280 ti: ffff880106570000 task.ti: ffff880106570000
 RIP: 0010:[<ffffffff8182f91b>]  [<ffffffff8182f91b>] dst_destroy+0xa6/0xef
 RSP: 0018:ffff880107603e38  EFLAGS: 00010202
 RAX: 0000000000000001 RBX: ffff8800d225a000 RCX: ffffffff82250fd0
 RDX: 0000000000000001 RSI: ffffffff82250fd0 RDI: 6b6b6b6b6b6b6b6b
 RBP: ffff880107603e58 R08: 0000000000000001 R09: 0000000000000001
 R10: 000000000000b530 R11: ffff880107609000 R12: 0000000000000000
 R13: ffffffff82343c40 R14: 0000000000000000 R15: ffffffff8182fb4f
 FS:  0000000000000000(0000) GS:ffff880107600000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
 CR2: 00007fcabd9d3000 CR3: 00000000d7279000 CR4: 00000000000006e0
 Stack:
  ffffffff82250fd0 ffff8801077d6f00 ffffffff82253c40 ffff8800d225a000
  ffff880107603e68 ffffffff8182fb5d ffff880107603f08 ffffffff810d795e
  ffffffff810d7648 ffff880106574000 ffff88010656d280 ffff88010656d280
 Call Trace:
  <IRQ>
  [<ffffffff8182fb5d>] dst_destroy_rcu+0xe/0x1d
  [<ffffffff810d795e>] rcu_process_callbacks+0x618/0x7eb
  [<ffffffff810d7648>] ? rcu_process_callbacks+0x302/0x7eb
  [<ffffffff8182fb4f>] ? dst_gc_task+0x1eb/0x1eb
  [<ffffffff8107e11b>] __do_softirq+0x178/0x39f
  [<ffffffff8107e52e>] irq_exit+0x41/0x95
  [<ffffffff81a4f215>] smp_apic_timer_interrupt+0x34/0x40
  [<ffffffff81a4d5cd>] apic_timer_interrupt+0x6d/0x80
  <EOI>
  [<ffffffff8100b968>] ? default_idle+0x21/0x32
  [<ffffffff8100b966>] ? default_idle+0x1f/0x32
  [<ffffffff8100bf19>] arch_cpu_idle+0xf/0x11
  [<ffffffff810b0bc7>] default_idle_call+0x1f/0x21
  [<ffffffff810b0dce>] cpu_startup_entry+0x1ad/0x273
  [<ffffffff8102fe67>] start_secondary+0x135/0x156

dst is freed right before lwtstate_put(), this is not correct...

Fixes: 61adedf3e3f1 ("route: move lwtunnel state to dst_entry")
Acked-by: Jiri Benc <jbenc@redhat.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Cong Wang <cwang@twopensource.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet-next: Fix warning while make xmldocs caused by skbuff.c
Masanari Iida [Mon, 24 Aug 2015 13:56:54 +0000 (22:56 +0900)]
net-next: Fix warning while make xmldocs caused by skbuff.c

This patch fix following warnings.

.//net/core/skbuff.c:407: warning: No description found
for parameter 'len'
.//net/core/skbuff.c:407: warning: Excess function parameter
 'length' description in '__netdev_alloc_skb'
.//net/core/skbuff.c:476: warning: No description found
 for parameter 'len'
.//net/core/skbuff.c:476: warning: Excess function parameter
'length' description in '__napi_alloc_skb'

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoppp: implement x-netns support
Guillaume Nault [Mon, 24 Aug 2015 09:35:30 +0000 (11:35 +0200)]
ppp: implement x-netns support

Let packets move from one netns to the other at PPP encapsulation and
decapsulation time.

PPP units and channels remain in the netns in which they were
originally created. Only the net_device may move to a different
namespace. Cross netns handling is thus transparent to lower PPP
layers (PPPoE, L2TP, etc.).

PPP devices are automatically unregistered when their netns gets
removed. So read() and poll() on the unit file descriptor will
respectively receive EOF and POLLHUP. Channels aren't affected.

Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: sun4i-emac: Claim emac sram
Hans de Goede [Sun, 23 Aug 2015 18:31:38 +0000 (20:31 +0200)]
net: sun4i-emac: Claim emac sram

Claim the emac sram ourselves, rather then relying on the bootloader
having mapped the sram to the emac controller during boot.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoinetpeer: remove dead code
David Ahern [Sun, 23 Aug 2015 14:21:22 +0000 (08:21 -0600)]
inetpeer: remove dead code

Remove various inlined functions not referenced in the kernel.

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet/mlx5e: Avoid accessing NULL pointer at ndo_select_queue
Rana Shahout [Sun, 23 Aug 2015 13:12:14 +0000 (16:12 +0300)]
net/mlx5e: Avoid accessing NULL pointer at ndo_select_queue

To avoid multiply/division operations on the data path,
we hold a {channel, tc}==>txq mapping table.
We held this mapping table inside the channel object that is
being destroyed upon some configuration operations (e.g MTU change).
So in case ndo_select_queue occurs during such a configuration operation,
it may access a NULL channel pointer, resulting in kernel panic.
To fix this issue we moved the {channel, tc}==>txq mapping table
outside the channel object so that it will be available also
during such configuration operations.

Signed-off-by: Rana Shahout <ranas@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoah4: Fix error return in ah_input().
David S. Miller [Tue, 25 Aug 2015 20:38:50 +0000 (13:38 -0700)]
ah4: Fix error return in ah_input().

Noticed by Herbert Xu.

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoah6: fix error return code
Julia Lawall [Sun, 23 Aug 2015 00:11:21 +0000 (02:11 +0200)]
ah6: fix error return code

Return a negative error code on failure.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
identifier ret; expression e1,e2;
@@
(
if (\(ret < 0\|ret != 0\))
 { ... return ret; }
|
ret = 0
)
... when != ret = e1
    when != &ret
*if(...)
{
  ... when != ret = e2
      when forall
 return ret;
}
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agomlxsw: fix error return code
Julia Lawall [Sun, 23 Aug 2015 00:11:16 +0000 (02:11 +0200)]
mlxsw: fix error return code

Return a negative error code on failure.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
identifier ret; expression e1,e2;
@@
(
if (\(ret < 0\|ret != 0\))
 { ... return ret; }
|
ret = 0
)
... when != ret = e1
    when != &ret
*if(...)
{
  ... when != ret = e2
      when forall
 return ret;
}
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agonet: davinci_emac: fix error return code
Julia Lawall [Sun, 23 Aug 2015 00:11:14 +0000 (02:11 +0200)]
net: davinci_emac: fix error return code

Propagate error code on failure.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
identifier ret; expression e1,e2;
@@
(
if (\(ret < 0\|ret != 0\))
 { ... return ret; }
|
ret = 0
)
... when != ret = e1
    when != &ret
*if(...)
{
  ... when != ret = e2
      when forall
 return ret;
}
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoMerge branch 'rds-assorted-bug-fixes'
David S. Miller [Tue, 25 Aug 2015 20:35:32 +0000 (13:35 -0700)]
Merge branch 'rds-assorted-bug-fixes'

Santosh Shilimkar says:

====================
RDS: Assorted bug fixes

We would like to improve RDS upstream support and in that context, I
started playing with it.  But run into number of issues including as
basic is RDS IB RDMA doesn't work. As part of the debug, I ended up
creating the $subject series which has bunch of assorted fixes. At
least with this series I can run RDS IB RDMA and other tests
successfully.

Some of these fixes have been done by Chris Meson, Andy Grover and
Zach Brown while at Oracle. There are still more kinks with FMR and
error handling and I plan to address them in a follow up series.

Series generated against Linus's master(v4.2-rc-7) but also applies
against next-next cleanly. Its tested on Oracle hardware with IB
fabric for both bcopy as well as RDMA mode. I don't have access
to iWARP hardware so any testing help on iWARP hardware appreciated.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: check for valid cm_id before initiating connection
santosh.shilimkar@oracle.com [Sat, 22 Aug 2015 22:45:35 +0000 (15:45 -0700)]
RDS: check for valid cm_id before initiating connection

Connection could have been dropped while the route is being resolved
so check for valid cm_id before initiating the connection.

Reviewed-by: Ajaykumar Hotchandani <ajaykumar.hotchandani@oracle.com>
Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: return EMSGSIZE for oversize requests before processing/queueing
Mukesh Kacker [Sat, 22 Aug 2015 22:45:34 +0000 (15:45 -0700)]
RDS: return EMSGSIZE for oversize requests before processing/queueing

rds_send_queue_rm() allows for the "current datagram" being queued
to exceed SO_SNDBUF thresholds by checking bytes queued without
counting in length of current datagram. (Since sk_sndbuf is set
to twice requested SO_SNDBUF value as a kernel heuristic this
is usually fine!)

If this "current datagram" squeezing past the threshold is itself
many times the size of the sk_sndbuf threshold itself then even
twice the SO_SNDBUF does not save us and it gets queued but
cannot be transmitted. Threads block and deadlock and device
becomes unusable. The check for this datagram not exceeding
SNDBUF thresholds (EMSGSIZE) is not done on this datagram as
that check is only done if queueing attempt fails.
(Datagrams that follow this datagram fail queueing attempts, go
through the check and eventually trip EMSGSIZE error but zero
length datagrams silently fail!)

This fix moves the check for datagrams exceeding SNDBUF limits
before any processing or queueing is attempted and returns EMSGSIZE
early in the rds_sndmsg() code. This change also ensures that all
datagrams get checked for exceeding SNDBUF/sk_sndbuf size limits
and the large datagrams that exceed those limits do not get to
rds_send_queue_rm() code for processing.

Signed-off-by: Mukesh Kacker <mukesh.kacker@oracle.com>
Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: make sure rds_send_drop_to properly takes the m_rs_lock
santosh.shilimkar@oracle.com [Sat, 22 Aug 2015 22:45:33 +0000 (15:45 -0700)]
RDS: make sure rds_send_drop_to properly takes the m_rs_lock

rds_send_drop_to() is used during socket tear down to find all the
messages on the socket and flush them .  It can race with the
acking code unless it takes the m_rs_lock on each and every message.

This plugs a hole where we didn't take m_rs_lock on any message that
didn't have the RDS_MSG_ON_CONN set.  Taking m_rs_lock avoids
double frees and other memory corruptions as the ack code trusts
the message m_rs pointer on a socket that had actually been freed.

We must take m_rs_lock to access m_rs.  Because of lock nesting and
rs access, we also need to acquire rs_lock.

Reviewed-by: Ajaykumar Hotchandani <ajaykumar.hotchandani@oracle.com>
Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: Don't destroy the rdma id until after we're done using it
Santosh Shilimkar [Sat, 22 Aug 2015 22:45:32 +0000 (15:45 -0700)]
RDS: Don't destroy the rdma id until after we're done using it

During connection resets, we are destroying the rdma id too soon. We can't
destroy it when it is still in use. So lets move rdma_destroy_id() after
we clear the rings.

Reviewed-by: Ajaykumar Hotchandani <ajaykumar.hotchandani@oracle.com>
Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: Fix assertion level from fatal to warning
santosh.shilimkar@oracle.com [Sat, 22 Aug 2015 22:45:31 +0000 (15:45 -0700)]
RDS: Fix assertion level from fatal to warning

Fix the asserion level since its not fatal and can be hit
in normal execution paths. There is no need to take the
system down.

We keep the WARN_ON() to detect the condition if we get
here with bad pages.

Reviewed-by: Ajaykumar Hotchandani <ajaykumar.hotchandani@oracle.com>
Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: Make sure we do a signaled send for large-send
santosh.shilimkar@oracle.com [Sat, 22 Aug 2015 22:45:30 +0000 (15:45 -0700)]
RDS: Make sure we do a signaled send for large-send

WR(Work Requests )always generate a WC(Work Completion) with
signaled send. Default RDS ib code is setup for un-signaled
completion. Since RDS connction is persistent, we can end up
sending the data even after large-send when the remote end is
not active(for any reason).

By doing  a signaled send at least once per large-send,
we can at least detect the problem in work completion
handler there by avoiding sending more data to
inactive remote.

Reviewed-by: Ajaykumar Hotchandani <ajaykumar.hotchandani@oracle.com>
Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: Mark message mapped before transmit
santosh.shilimkar@oracle.com [Sat, 22 Aug 2015 22:45:29 +0000 (15:45 -0700)]
RDS: Mark message mapped before transmit

rds_send_xmit() marks the rds message map flag after
xmit_[rdma/atomic]() which is clearly wrong.  We need
to maintain the ownership between transport and rds.

Also take care of error path.

Reviewed-by: Ajaykumar Hotchandani <ajaykumar.hotchandani@oracle.com>
Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: add a sock_destruct callback debug aid
santosh.shilimkar@oracle.com [Sat, 22 Aug 2015 22:45:28 +0000 (15:45 -0700)]
RDS: add a sock_destruct callback debug aid

This helps to detect the accidental processes/apps trying to destroy
the RDS socket which they are sharing with other processes/apps.

Reviewed-by: Ajaykumar Hotchandani <ajaykumar.hotchandani@oracle.com>
Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: check for congestion updates during rds_send_xmit
santosh.shilimkar@oracle.com [Sat, 22 Aug 2015 22:45:27 +0000 (15:45 -0700)]
RDS: check for congestion updates during rds_send_xmit

Ensure we don't keep sending the data if the link is congested.

Reviewed-by: Ajaykumar Hotchandani <ajaykumar.hotchandani@oracle.com>
Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: make sure we post recv buffers
santosh.shilimkar@oracle.com [Sat, 22 Aug 2015 22:45:26 +0000 (15:45 -0700)]
RDS: make sure we post recv buffers

If we get an ENOMEM during rds_ib_recv_refill, we might never come
back and refill again later. Patch makes sure to kick krdsd into
helping out.

To achieve this we add RDS_RECV_REFILL flag and update in the refill
path based on that so that at least some therad will keep posting
receive buffers.

Since krdsd and softirq both might race for refill, we decide to
schedule on work queue based on ring_low instead of ring_empty.

Reviewed-by: Ajaykumar Hotchandani <ajaykumar.hotchandani@oracle.com>
Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: don't update ip address tables if the address hasn't changed
santosh.shilimkar@oracle.com [Sat, 22 Aug 2015 22:45:25 +0000 (15:45 -0700)]
RDS: don't update ip address tables if the address hasn't changed

If the ip address tables hasn't changed, there is no need to remove
them only to be added back again.

Lets fix it.
Reviewed-by: Ajaykumar Hotchandani <ajaykumar.hotchandani@oracle.com>
Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: destroy the ib state earlier during shutdown
santosh.shilimkar@oracle.com [Sat, 22 Aug 2015 22:45:24 +0000 (15:45 -0700)]
RDS: destroy the ib state earlier during shutdown

Destroy ib state early during shutdown. Otherwise we can get callbacks
after the QP isn't really able to handle them.

Reviewed-by: Ajaykumar Hotchandani <ajaykumar.hotchandani@oracle.com>
Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: always free recv frag as we free its ring entry
santosh.shilimkar@oracle.com [Sat, 22 Aug 2015 22:45:23 +0000 (15:45 -0700)]
RDS: always free recv frag as we free its ring entry

We were still seeing rare occurrences of the WARN_ON(recv->r_frag) which
indicates that the recv refill path was finding allocated frags in ring
entries that were marked free. These were usually followed by OOM crashes.
They only seem to be occurring in the presence of completion errors and
connection resets.

This patch ensures that we free the frag as we mark the ring entry free.
This should stop the refill path from finding allocated frags in ring
entries that were marked free.

Reviewed-by: Ajaykumar Hotchandani <ajaykumar.hotchandani@oracle.com>
Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoRDS: restore return value in rds_cmsg_rdma_args()
santosh.shilimkar@oracle.com [Sat, 22 Aug 2015 22:45:22 +0000 (15:45 -0700)]
RDS: restore return value in rds_cmsg_rdma_args()

In rds_cmsg_rdma_args() 'ret' is used by rds_pin_pages() which returns
number of pinned pages on success. And the same value is returned to the
caller of rds_cmsg_rdma_args() on success which is not intended.

Commit f4a3fc03c1d7 ("RDS: Clean up error handling in rds_cmsg_rdma_args")
removed the 'ret = 0' line which broke RDS RDMA mode.

Fix it by restoring the return value on rds_pin_pages() success
keeping the clean-up in place.

Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agotcp: refine pacing rate determination
Eric Dumazet [Sat, 22 Aug 2015 00:38:02 +0000 (17:38 -0700)]
tcp: refine pacing rate determination

When TCP pacing was added back in linux-3.12, we chose
to apply a fixed ratio of 200 % against current rate,
to allow probing for optimal throughput even during
slow start phase, where cwnd can be doubled every other gRTT.

At Google, we found it was better applying a different ratio
while in Congestion Avoidance phase.
This ratio was set to 120 %.

We've used the normal tcp_in_slow_start() helper for a while,
then tuned the condition to select the conservative ratio
as soon as cwnd >= ssthresh/2 :

- After cwnd reduction, it is safer to ramp up more slowly,
  as we approach optimal cwnd.
- Initial ramp up (ssthresh == INFINITY) still allows doubling
  cwnd every other RTT.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agoxfrm: Use VRF master index if output device is enslaved
David Ahern [Thu, 20 Aug 2015 22:06:30 +0000 (15:06 -0700)]
xfrm: Use VRF master index if output device is enslaved

Directs route lookups to VRF table. Compiles out if NET_VRF is not
enabled. With this patch able to successfully bring up ipsec tunnels
in VRFs, even with duplicate network configuration.

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agotcp: fix slow start after idle vs TSO/GSO
Eric Dumazet [Fri, 21 Aug 2015 19:30:00 +0000 (12:30 -0700)]
tcp: fix slow start after idle vs TSO/GSO

slow start after idle might reduce cwnd, but we perform this
after first packet was cooked and sent.

With TSO/GSO, it means that we might send a full TSO packet
even if cwnd should have been reduced to IW10.

Moving the SSAI check in skb_entail() makes sense, because
we slightly reduce number of times this check is done,
especially for large send() and TCP Small queue callbacks from
softirq context.

As Neal pointed out, we also need to perform the check
if/when receive window opens.

Tested:

Following packetdrill test demonstrates the problem
// Test of slow start after idle

`sysctl -q net.ipv4.tcp_slow_start_after_idle=1`

0.000 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
+0    setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
+0    bind(3, ..., ...) = 0
+0    listen(3, 1) = 0

+0    < S 0:0(0) win 65535 <mss 1000,sackOK,nop,nop,nop,wscale 7>
+0    > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 6>
+.100 < . 1:1(0) ack 1 win 511
+0    accept(3, ..., ...) = 4
+0    setsockopt(4, SOL_SOCKET, SO_SNDBUF, [200000], 4) = 0

+0    write(4, ..., 26000) = 26000
+0    > . 1:5001(5000) ack 1
+0    > . 5001:10001(5000) ack 1
+0    %{ assert tcpi_snd_cwnd == 10 }%

+.100 < . 1:1(0) ack 10001 win 511
+0    %{ assert tcpi_snd_cwnd == 20, tcpi_snd_cwnd }%
+0    > . 10001:20001(10000) ack 1
+0    > P. 20001:26001(6000) ack 1

+.100 < . 1:1(0) ack 26001 win 511
+0    %{ assert tcpi_snd_cwnd == 36, tcpi_snd_cwnd }%

+4 write(4, ..., 20000) = 20000
// If slow start after idle works properly, we should send 5 MSS here (cwnd/2)
+0    > . 26001:31001(5000) ack 1
+0    %{ assert tcpi_snd_cwnd == 10, tcpi_snd_cwnd }%
+0    > . 31001:36001(5000) ack 1

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
8 years agorsi: Fix possible leak when loading firmware
Christian Engelmayer [Fri, 21 Aug 2015 21:14:26 +0000 (23:14 +0200)]
rsi: Fix possible leak when loading firmware

Commit 5d5cd85ff441 ("rsi: Fix failure to load firmware after memory
leak fix and fix the leak") also added a check on the allocation of
DMA-accessible memory that may directly return. In that case the
already allocated firmware data is leaked. Make sure the data is
always freed correctly. Detected by Coverity CID 1316519.

Fixes: 5d5cd85ff441 ("rsi: Fix failure to load firmware after memory leak fix and fix the leak")
Signed-off-by: Christian Engelmayer <cengelma@gmx.at>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
8 years agobrcmfmac: Add support for host platform NVRAM loading.
Hante Meuleman [Thu, 20 Aug 2015 20:06:08 +0000 (22:06 +0200)]
brcmfmac: Add support for host platform NVRAM loading.

Host platforms such as routers supported by OpenWRT can
support NVRAM reading directly from internal NVRAM store.
With this patch the nvram load routines will fall back to
this method when there is no nvram file and support is
available in the kernel.

Reviewed-by: Arend Van Spriel <arend@broadcom.com>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Daniel (Deognyoun) Kim <dekim@broadcom.com>
Signed-off-by: Hante Meuleman <meuleman@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
8 years agobrcmfmac: bump highest event number for 4339 firmware
Arend van Spriel [Thu, 20 Aug 2015 20:06:07 +0000 (22:06 +0200)]
brcmfmac: bump highest event number for 4339 firmware

The event mask length is determined by the highest event number
that is specified in the driver. When this length is shorter than
firmware expects setting event mask will fail and device becomes
pretty useless. This issue was reported with bcm4339 firmware that
was recently released.

Reported-by: Pontus Fuchs <pontusf@broadcom.com>
Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Pontus Fuchs <pontusf@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
8 years agobrcmfmac: block the correct flowring when backup queue overflow
Franky Lin [Thu, 20 Aug 2015 20:06:06 +0000 (22:06 +0200)]
brcmfmac: block the correct flowring when backup queue overflow

brcmf_flowring_block blocks the last active flowring under the same
interface instead of the one provided by caller. This could lead to a
dead lock of netif stop if there are more than one flowring under the
interface and the traffic is high enough so brcmf_flowring_enqueue can
not unblock the ring right away.

Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Signed-off-by: Franky Lin <frankyl@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
8 years agobrcmfmac: make use of cfg80211_check_combinations()
Arend van Spriel [Thu, 20 Aug 2015 20:06:05 +0000 (22:06 +0200)]
brcmfmac: make use of cfg80211_check_combinations()

Use cfg80211_check_combinations() so we can bail out early when an
interface add or change results in an invalid combination.

Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
8 years agobrcmfmac: add debugfs entry for msgbuf statistics
Franky Lin [Thu, 20 Aug 2015 20:06:04 +0000 (22:06 +0200)]
brcmfmac: add debugfs entry for msgbuf statistics

Expose ring buffer read/write pointers and other useful statistics
through debugfs.

Reviewed-by: Arend Van Spriel <arend@broadcom.com>
Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Franky Lin <frankyl@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
8 years agobrcmfmac: correct interface combination info
Arend van Spriel [Thu, 20 Aug 2015 20:06:03 +0000 (22:06 +0200)]
brcmfmac: correct interface combination info

The interface combination provided by brcmfmac did not truly reflect
the combinations supported by driver and/or firmware.

Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Pontus Fuchs <pontusf@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
8 years agobrcmfmac: check all combinations when setting wiphy's addresses
Rafał Miłecki [Wed, 19 Aug 2015 22:16:42 +0000 (00:16 +0200)]
brcmfmac: check all combinations when setting wiphy's addresses

Broadcom is working on better reflection of interface combinations. With
upcoming patches we may have 1st combination supporting less interfaces
than others.
To don't run out of addresses check all combinations to find the one
with the greatest max_interfaces value.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
8 years agortlwifi: rtl8192cu: Add new device ID
Adrien Schildknecht [Wed, 19 Aug 2015 15:33:12 +0000 (17:33 +0200)]
rtlwifi: rtl8192cu: Add new device ID

The v2 of NetGear WNA1000M uses a different idProduct: USB ID 0846:9043

Signed-off-by: Adrien Schildknecht <adrien+dev@schischi.me>
Cc: Stable <stable@vger.kernel.org>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
8 years agortlwifi: rtl8192ee: fix semicolon.cocci warnings
Wu Fengguang [Sat, 15 Aug 2015 10:36:37 +0000 (18:36 +0800)]
rtlwifi: rtl8192ee: fix semicolon.cocci warnings

drivers/net/wireless/rtlwifi/rtl8192ee/phy.c:856:2-3: Unneeded semicolon
drivers/net/wireless/rtlwifi/rtl8192ee/phy.c:492:3-4: Unneeded semicolon
drivers/net/wireless/rtlwifi/rtl8192ee/phy.c:452:3-4: Unneeded semicolon

 Remove unneeded semicolon.

Generated by: scripts/coccinelle/misc/semicolon.cocci

CC: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
8 years agoath9k_htc: do ani shortcalibratio if we got -ETIMEDOUT
Oleksij Rempel [Fri, 14 Aug 2015 05:16:39 +0000 (07:16 +0200)]
ath9k_htc: do ani shortcalibratio if we got -ETIMEDOUT

current code will handle -ETIMEDOUT as success which is probalbly wrong.

According to this comment I assume it is safe to handle -ETIMEDOUT as false:
drivers/net/wireless/ath/ath9k/calib.c
290         /*
291          * We timed out waiting for the noisefloor to load, probably due to an
292          * in-progress rx. Simply return here and allow the load plenty of time
293          * to complete before the next calibration interval.  We need to avoid
294          * trying to load -50 (which happens below) while the previous load is
295          * still in progress as this can cause rx deafness. Instead by returning
296          * here, the baseband nf cal will just be capped by our present
297          * noisefloor until the next calibration timer.
298          */

Since no other error wariants are present, this patch is checking only
for (ret <= 0).

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
8 years agoMerge tag 'iwlwifi-next-for-kalle-2015-08-23' of https://git.kernel.org/pub/scm/linux...
Kalle Valo [Tue, 25 Aug 2015 11:54:38 +0000 (14:54 +0300)]
Merge tag 'iwlwifi-next-for-kalle-2015-08-23' of https://git./linux/kernel/git/iwlwifi/iwlwifi-next

* new Tx power firmware API
* bump max firmware API to 17
* fix bug in debug prints
* static checker fix
* fix unused defines
* fix command list on newest firmware

8 years agobatman-adv: beautify supported routing algorithm list
Marek Lindner [Fri, 17 Jul 2015 14:25:59 +0000 (22:25 +0800)]
batman-adv: beautify supported routing algorithm list

Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
8 years agobatman-adv: Fix conditional statements indentation
Sven Eckelmann [Fri, 17 Jul 2015 08:03:42 +0000 (10:03 +0200)]
batman-adv: Fix conditional statements indentation

commit 29b9256e6631 ("batman-adv: consider outgoing interface in OGM
sending") incorrectly indented the interface check code.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
8 years agobatman-adv: Add lockdep_asserts for documented external locks
Sven Eckelmann [Sun, 21 Jun 2015 12:45:15 +0000 (14:45 +0200)]
batman-adv: Add lockdep_asserts for documented external locks

Some functions already have documentation about locks they require inside
their kerneldoc header. These can be directly tested during runtime using
the lockdep asserts.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
8 years agobatman-adv: Annotate deleting functions with external lock via lockdep
Sven Eckelmann [Sun, 21 Jun 2015 12:45:14 +0000 (14:45 +0200)]
batman-adv: Annotate deleting functions with external lock via lockdep

Functions which use (h)list_del* are requiring correct locking when they
operate on global lists. Most of the time the search in the list and the
delete are done in the same function. All other cases should have it
visible that they require a special lock to avoid race conditions.

Lockdep asserts can be used to check these problem during runtime when the
lockdep functionality is enabled.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
8 years agobatman-adv: convert bat_priv->tt.req_list to hlist
Marek Lindner [Sun, 28 Jun 2015 14:16:06 +0000 (22:16 +0800)]
batman-adv: convert bat_priv->tt.req_list to hlist

Since the list's tail is never accessed using a double linked list head
wastes memory.

Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
8 years agobatman-adv: Fix gw_bandwidth calculation on 32 bit systems
Sven Eckelmann [Sun, 21 Jun 2015 17:40:09 +0000 (19:40 +0200)]
batman-adv: Fix gw_bandwidth calculation on 32 bit systems

The TVLV for the gw_bandwidth stores everything as u32. But the
gw_bandwidth reads the signed long which limits the maximum value to
(2 ** 31 - 1) on systems with 4 byte long. Also the input value is always
converted from either Mibit/s or Kibit/s to 100Kibit/s. This reduces the
values even further when the user sets it via the default unit Kibit/s. It
may even cause an integer overflow and end up with a value the user never
intended.

Instead read the values as u64, check for possible overflows, do the unit
adjustments and then reduce the size to u32.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
8 years agobatman-adv: Return EINVAL on invalid gw_bandwidth change
Sven Eckelmann [Sun, 21 Jun 2015 12:42:49 +0000 (14:42 +0200)]
batman-adv: Return EINVAL on invalid gw_bandwidth change

Invalid speed settings by the user are currently acknowledged as correct
but not stored. Instead the return of the store operation of the file
"gw_bandwidth" should indicate that the given value is not acceptable.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
8 years agobatman-adv: prevent potential hlist double deletion
Marek Lindner [Sun, 21 Jun 2015 16:30:23 +0000 (00:30 +0800)]
batman-adv: prevent potential hlist double deletion

The hlist_del_rcu() call in batadv_tt_global_size_mod() does not check
if the element still is part of the list prior to deletion. The atomic
list counter should prevent the worst but converting to
hlist_del_init_rcu() ensures the element can't be deleted more than
once.

Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>