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301214 commits

Author SHA1 Message Date
Stanislaw Gruszka
f6b1154678 iwlwifi: add option to disable 5GHz band
There are various problems happened on 5GHz band not observed on
2.4 GHz (microcode errors, queue stuck, etc... ) . Also roaming
between 5GHz AP and 2GHz does not work very well. To workaround
the problems add option to disable 5GHz support. This will help
on environments where APs are dual-band, and devices will not try
to associate on band where issues happen.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
2012-05-08 20:56:09 -04:00
Emmanuel Grumbach
c15797e6af iwlwifi: use IWL_* instead of dev_printk when possible
Also remove a debug print when allocation error occurred.
The kernel will complain anyway.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
2012-05-08 20:56:09 -04:00
Wey-Yi Guy
4d5ba61ca3 iwlwifi: add loose coex lut
Add the Loose coex LUT and will use later for better bt coex tpt

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
2012-05-08 20:56:09 -04:00
Wey-Yi Guy
9dc4ca92aa iwlwifi: change kill mask based on reduce power state
In bt coex, consider reduce tx power as part of ack/cts kill mask

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
2012-05-08 20:56:09 -04:00
Wey-Yi Guy
310fbfd985 iwlwifi: send reduce tx power info in command
Add the reduce tx power information in bt coex host command

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
2012-05-08 20:56:08 -04:00
Wey-Yi Guy
7edae18490 iwlwifi: small define change
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
2012-05-08 20:56:08 -04:00
Wey-Yi Guy
4aa79d91f0 iwlwifi: add reduced tx power threshold define
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
2012-05-08 20:56:08 -04:00
Wey-Yi Guy
354ce4a4ca iwlwifi: add checking for the condition to reduce tx power
When bluetooth coex is active and certain condition matched,
driver need to decide should the tx power been reduce or not.
Adding the logic to manage it.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
2012-05-08 20:56:08 -04:00
Wey-Yi Guy
9a00be04e6 iwlwifi: add BT reduced tx power flag
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
2012-05-08 20:56:08 -04:00
Wey-Yi Guy
a70453b5d0 iwlwifi: remove unused macros
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
2012-05-08 20:56:08 -04:00
Luis R. Rodriguez
138a53ef49 libertas: include sched.h on firmware.c
Do not assume we have our subsystem including this for us,
at least for older kernels this is not true. Lets just be
explicit about this requirement for the usage of wake_up().

Signed-off-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-05-08 20:56:07 -04:00
David S. Miller
9bb862beb6 Merge branch 'master' of git://1984.lsi.us.es/net-next 2012-05-08 14:40:21 -04:00
Pablo Neira Ayuso
d16cf20e2f netfilter: remove ip_queue support
This patch removes ip_queue support which was marked as obsolete
years ago. The nfnetlink_queue modules provides more advanced
user-space packet queueing mechanism.

This patch also removes capability code included in SELinux that
refers to ip_queue. Otherwise, we break compilation.

Several warning has been sent regarding this to the mailing list
in the past month without anyone rising the hand to stop this
with some strong argument.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2012-05-08 20:25:42 +02:00
Pablo Neira Ayuso
6714cf5465 netfilter: nf_conntrack: fix explicit helper attachment and NAT
Explicit helper attachment via the CT target is broken with NAT
if non-standard ports are used. This problem was hidden behind
the automatic helper assignment routine. Thus, it becomes more
noticeable now that we can disable the automatic helper assignment
with Eric Leblond's:

9e8ac5a netfilter: nf_ct_helper: allow to disable automatic helper assignment

Basically, nf_conntrack_alter_reply asks for looking up the helper
up if NAT is enabled. Unfortunately, we don't have the conntrack
template at that point anymore.

Since we don't want to rely on the automatic helper assignment,
we can skip the second look-up and stick to the helper that was
attached by iptables. With the CT target, the user is in full
control of helper attachment, thus, the policy is to trust what
the user explicitly configures via iptables (no automatic magic
anymore).

Interestingly, this bug was hidden by the automatic helper look-up
code. But it can be easily trigger if you attach the helper in
a non-standard port, eg.

iptables -I PREROUTING -t raw -p tcp --dport 8888 \
	-j CT --helper ftp

And you disabled the automatic helper assignment.

I added the IPS_HELPER_BIT that allows us to differenciate between
a helper that has been explicitly attached and those that have been
automatically assigned. I didn't come up with a better solution
(having backward compatibility in mind).

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2012-05-08 19:44:42 +02:00
Kelvie Wong
9768e1ace4 netfilter: nf_ct_expect: partially implement ctnetlink_change_expect
This refreshes the "timeout" attribute in existing expectations if one is
given.

The use case for this would be for userspace helpers to extend the lifetime
of the expectation when requested, as this is not possible right now
without deleting/recreating the expectation.

I use this specifically for forwarding DCERPC traffic through:

DCERPC has a port mapper daemon that chooses a (seemingly) random port for
future traffic to go to. We expect this traffic (with a reasonable
timeout), but sometimes the port mapper will tell the client to continue
using the same port. This allows us to extend the expectation accordingly.

Signed-off-by: Kelvie Wong <kelvie@ieee.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2012-05-08 19:40:59 +02:00
Hans Schillstrom
6d8ebc8a27 net: export sysctl_[r|w]mem_max symbols needed by ip_vs_sync
To build ip_vs as a module sysctl_rmem_max and sysctl_wmem_max
needs to be exported.

The dependency was added by "ipvs: wakeup master thread" patch.

Signed-off-by: Hans Schillstrom <hans.schillstrom@ericsson.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2012-05-08 19:40:56 +02:00
H Hartley Sweeten
068d522067 ipvs: ip_vs_proto: local functions should not be exposed globally
Functions not referenced outside of a source file should be marked
static to prevent it from being exposed globally.

This quiets the sparse warnings:

warning: symbol '__ipvs_proto_data_get' was not declared. Should it be static?

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-05-08 19:40:54 +02:00
H Hartley Sweeten
d5cce20874 ipvs: ip_vs_ftp: local functions should not be exposed globally
Functions not referenced outside of a source file should be marked
static to prevent it from being exposed globally.

This quiets the sparse warnings:

warning: symbol 'ip_vs_ftp_init' was not declared. Should it be static?

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-05-08 19:40:52 +02:00
Pablo Neira Ayuso
6b324dbfc3 ipvs: optimize the use of flags in ip_vs_bind_dest
cp->flags is marked volatile but ip_vs_bind_dest
can safely modify the flags, so save some CPU cycles by
using temp variable.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-05-08 19:40:49 +02:00
Pablo Neira Ayuso
f73181c828 ipvs: add support for sync threads
Allow master and backup servers to use many threads
for sync traffic. Add sysctl var "sync_ports" to define the
number of threads. Every thread will use single UDP port,
thread 0 will use the default port 8848 while last thread
will use port 8848+sync_ports-1.

	The sync traffic for connections is scheduled to many
master threads based on the cp address but one connection is
always assigned to same thread to avoid reordering of the
sync messages.

	Remove ip_vs_sync_switch_mode because this check
for sync mode change is still risky. Instead, check for mode
change under sync_buff_lock.

	Make sure the backup socks do not block on reading.

Special thanks to Aleksey Chudov for helping in all tests.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Tested-by: Aleksey Chudov <aleksey.chudov@gmail.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-05-08 19:40:33 +02:00
Julian Anastasov
749c42b620 ipvs: reduce sync rate with time thresholds
Add two new sysctl vars to control the sync rate with the
main idea to reduce the rate for connection templates because
currently it depends on the packet rate for controlled connections.
This mechanism should be useful also for normal connections
with high traffic.

sync_refresh_period: in seconds, difference in reported connection
	timer that triggers new sync message. It can be used to
	avoid sync messages for the specified period (or half of
	the connection timeout if it is lower) if connection state
	is not changed from last sync.

sync_retries: integer, 0..3, defines sync retries with period of
	sync_refresh_period/8. Useful to protect against loss of
	sync messages.

	Allow sysctl_sync_threshold to be used with
sysctl_sync_period=0, so that only single sync message is sent
if sync_refresh_period is also 0.

	Add new field "sync_endtime" in connection structure to
hold the reported time when connection expires. The 2 lowest
bits will represent the retry count.

	As the sysctl_sync_period now can be 0 use ACCESS_ONCE to
avoid division by zero.

	Special thanks to Aleksey Chudov for being patient with me,
for his extensive reports and helping in all tests.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Tested-by: Aleksey Chudov <aleksey.chudov@gmail.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-05-08 19:40:10 +02:00
Pablo Neira Ayuso
1c003b1580 ipvs: wakeup master thread
High rate of sync messages in master can lead to
overflowing the socket buffer and dropping the messages.
Fixed sleep of 1 second without wakeup events is not suitable
for loaded masters,

	Use delayed_work to schedule sending for queued messages
and limit the delay to IPVS_SYNC_SEND_DELAY (20ms). This will
reduce the rate of wakeups but to avoid sending long bursts we
wakeup the master thread after IPVS_SYNC_WAKEUP_RATE (8) messages.

	Add hard limit for the queued messages before sending
by using "sync_qlen_max" sysctl var. It defaults to 1/32 of
the memory pages but actually represents number of messages.
It will protect us from allocating large parts of memory
when the sending rate is lower than the queuing rate.

	As suggested by Pablo, add new sysctl var
"sync_sock_size" to configure the SNDBUF (master) or
RCVBUF (slave) socket limit. Default value is 0 (preserve
system defaults).

	Change the master thread to detect and block on
SNDBUF overflow, so that we do not drop messages when
the socket limit is low but the sync_qlen_max limit is
not reached. On ENOBUFS or other errors just drop the
messages.

	Change master thread to enter TASK_INTERRUPTIBLE
state early, so that we do not miss wakeups due to messages or
kthread_should_stop event.

Thanks to Pablo Neira Ayuso for his valuable feedback!

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-05-08 19:39:53 +02:00
Julian Anastasov
cdcc5e905d ipvs: always update some of the flags bits in backup
As the goal is to mirror the inactconns/activeconns
counters in the backup server, make sure the cp->flags are
updated even if cp is still not bound to dest. If cp->flags
are not updated ip_vs_bind_dest will rely only on the initial
flags when updating the counters. To avoid mistakes and
complicated checks for protocol state rely only on the
IP_VS_CONN_F_INACTIVE bit when updating the counters.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Tested-by: Aleksey Chudov <aleksey.chudov@gmail.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-05-08 19:38:31 +02:00
Julian Anastasov
882a844bd5 ipvs: fix ip_vs_try_bind_dest to rebind app and transmitter
Initially, when the synced connection is created we
use the forwarding method provided by master but once we
bind to destination it can be changed. As result, we must
update the application and the transmitter.

	As ip_vs_try_bind_dest is called always for connections
that require dest binding, there is no need to validate the
cp and dest pointers.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-05-08 19:38:28 +02:00
Julian Anastasov
06611f82cc ipvs: remove check for IP_VS_CONN_F_SYNC from ip_vs_bind_dest
As the IP_VS_CONN_F_INACTIVE bit is properly set
in cp->flags for all kind of connections we do not need to
add special checks for synced connections when updating
the activeconns/inactconns counters for first time. Now
logic will look just like in ip_vs_unbind_dest.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-05-08 19:38:26 +02:00
Julian Anastasov
82cfc06278 ipvs: ignore IP_VS_CONN_F_NOOUTPUT in backup server
As IP_VS_CONN_F_NOOUTPUT is derived from the
forwarding method we should get it from conn_flags just
like we do it for IP_VS_CONN_F_FWD_MASK bits when binding
to real server.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-05-08 19:38:24 +02:00
Sasha Levin
9615e61e6f ipvs: use GFP_KERNEL allocation where possible
Use GFP_KERNEL instead of GFP_ATOMIC when registering an ipvs protocol.

This is safe since it will always run from a process context.

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2012-05-08 19:38:22 +02:00
Julian Anastasov
d6318f08e8 ipvs: SH scheduler does not need GFP_ATOMIC allocation
Schedulers are initialized and bound to services only
on commands.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Hans Schillstrom <hans@schillstrom.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-05-08 19:37:28 +02:00
Julian Anastasov
45d4e71a39 ipvs: LBLCR scheduler does not need GFP_ATOMIC allocation on init
Schedulers are initialized and bound to services only
on commands.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Hans Schillstrom <hans@schillstrom.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-05-08 19:37:26 +02:00
Julian Anastasov
4f2a94dcb6 ipvs: WRR scheduler does not need GFP_ATOMIC allocation
Schedulers are initialized and bound to services only
on commands.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Hans Schillstrom <hans@schillstrom.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-05-08 19:37:22 +02:00
Julian Anastasov
4beddbe38c ipvs: DH scheduler does not need GFP_ATOMIC allocation
Schedulers are initialized and bound to services only
on commands.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Hans Schillstrom <hans@schillstrom.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-05-08 19:37:20 +02:00
Julian Anastasov
748d845ca9 ipvs: LBLC scheduler does not need GFP_ATOMIC allocation on init
Schedulers are initialized and bound to services only
on commands.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Hans Schillstrom <hans@schillstrom.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-05-08 19:37:17 +02:00
Julian Anastasov
41cff6d5c9 ipvs: timeout tables do not need GFP_ATOMIC allocation
They are called only on initialization.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Hans Schillstrom <hans@schillstrom.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2012-05-08 19:37:09 +02:00
Pablo Neira Ayuso
4981682cc1 netfilter: bridge: optionally set indev to vlan
if net.bridge.bridge-nf-filter-vlan-tagged sysctl is enabled, bridge
netfilter removes the vlan header temporarily and then feeds the packet
to ip(6)tables.

When the new "bridge-nf-pass-vlan-input-device" sysctl is on
(default off), then bridge netfilter will also set the
in-interface to the vlan interface; if such an interface exists.

This is needed to make iptables REDIRECT target work with
"vlan-on-top-of-bridge" setups and to allow use of "iptables -i" to
match the vlan device name.

Also update Documentation with current brnf default settings.

Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Bart De Schuymer <bdschuym@pandora.be>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2012-05-08 19:36:47 +02:00
Eric Dumazet
ac3a546ac8 netfilter: nf_conntrack: use this_cpu_inc()
this_cpu_inc() is IRQ safe and faster than
local_bh_disable()/__this_cpu_inc()/local_bh_enable(), at least on x86.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Patrick McHardy <kaber@trash.net>
Cc: Christoph Lameter <cl@linux.com>
Cc: Tejun Heo <tj@kernel.org>
Reviewed-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2012-05-08 19:36:33 +02:00
Eric Leblond
a900689264 netfilter: nf_ct_helper: allow to disable automatic helper assignment
This patch allows you to disable automatic conntrack helper
lookup based on TCP/UDP ports, eg.

echo 0 > /proc/sys/net/netfilter/nf_conntrack_helper

[ Note: flows that already got a helper will keep using it even
  if automatic helper assignment has been disabled ]

Once this behaviour has been disabled, you have to explicitly
use the iptables CT target to attach helper to flows.

There are good reasons to stop supporting automatic helper
assignment, for further information, please read:

http://www.netfilter.org/news.html#2012-04-03

This patch also adds one message to inform that automatic helper
assignment is deprecated and it will be removed soon (this is
spotted only once, with the first flow that gets a helper attached
to make it as less annoying as possible).

Signed-off-by: Eric Leblond <eric@regit.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2012-05-08 19:35:18 +02:00
Tony Zelenoff
031d7709f2 netfilter: nf_ct_ecache: refactor notifier registration
* ret variable initialization removed as useless
* similar code strings concatenated and functions code
  flow became more plain

Signed-off-by: Tony Zelenoff <antonz@parallels.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2012-05-08 19:17:23 +02:00
Joe Perches
b44907e64c etherdev.h: Convert int is_<foo>_ether_addr to bool
Make the return value explicitly true or false.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-08 13:06:16 -04:00
Steve Glendinning
97138a1ca7 smsc75xx: let EEPROM determine GPIO/LED settings
This patch allows the GPIO/LED settings to be configured by the
EEPROM if present, and only sets the default values (LED outputs
for link/activity) when an EEPROM is not detected.

Signed-off-by: Steve Glendinning <steve.glendinning@shawell.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-07 23:43:57 -04:00
Steve Glendinning
4f94a929e4 smsc75xx: eliminate unnecessary phy register read
Only a write is necessary to clear the interrupt status, and we
don't use the value from the preceding read operation.  This
patch eliminates the unnecessary read.

Signed-off-by: Steve Glendinning <steve.glendinning@shawell.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-07 23:43:56 -04:00
Steve Glendinning
7749622d7f smsc75xx: replace 0xffff with PHY_INT_SRC_CLEAR_ALL
This patch defines PHY_INT_SRC_CLEAR_ALL to replace the value 0xffff
in order to be more self-documenting.

This patch should make no functional change, it is purely cosmetic.

Signed-off-by: Steve Glendinning <steve.glendinning@shawell.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-07 23:43:56 -04:00
David S. Miller
0d6c4a2e46 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
	drivers/net/ethernet/intel/e1000e/param.c
	drivers/net/wireless/iwlwifi/iwl-agn-rx.c
	drivers/net/wireless/iwlwifi/iwl-trans-pcie-rx.c
	drivers/net/wireless/iwlwifi/iwl-trans.h

Resolved the iwlwifi conflict with mainline using 3-way diff posted
by John Linville and Stephen Rothwell.  In 'net' we added a bug
fix to make iwlwifi report a more accurate skb->truesize but this
conflicted with RX path changes that happened meanwhile in net-next.

In e1000e a conflict arose in the validation code for settings of
adapter->itr.  'net-next' had more sophisticated logic so that
logic was used.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-07 23:35:40 -04:00
David S. Miller
6e06c0e234 Merge branch 'vhost-net-next' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Michael S. Tsirkin says:

--------------------
There are mostly bugfixes here.
I hope to merge some more patches by 3.5, in particular
vlan support fixes are waiting for Eric's ack,
and a version of tracepoint patch might be
ready in time, but let's merge what's ready so it's testable.

This includes a ton of zerocopy fixes by Jason -
good stuff but too intrusive for 3.4 and zerocopy is experimental
anyway.

virtio supported delayed interrupt for a while now
so adding support to the virtio tool made sense
--------------------

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-07 23:05:26 -04:00
Jiri Pirko
3a084ddb4b net: IP_MULTICAST_IF setsockopt now recognizes struct mreq
Until now, struct mreq has not been recognized and it was worked with
as with struct in_addr. That means imr_multiaddr was copied to
imr_address. So do recognize struct mreq here and copy that correctly.

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-07 23:03:22 -04:00
David Daney
416912a129 netdev/of/phy: Add MDIO bus multiplexer driven by GPIO lines.
The GPIO pins select which sub bus is connected to the master.

Initially tested with an sn74cbtlv3253 switch device wired into the
MDIO bus.

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-07 22:58:09 -04:00
David Daney
0ca2997d14 netdev/of/phy: Add MDIO bus multiplexer support.
This patch adds a somewhat generic framework for MDIO bus
multiplexers.  It is modeled on the I2C multiplexer.

The multiplexer is needed if there are multiple PHYs with the same
address connected to the same MDIO bus adepter, or if there is
insufficient electrical drive capability for all the connected PHY
devices.

Conceptually it could look something like this:

                   ------------------
                   | Control Signal |
                   --------+---------
                           |
 ---------------   --------+------
 | MDIO MASTER |---| Multiplexer |
 ---------------   --+-------+----
                     |       |
                     C       C
                     h       h
                     i       i
                     l       l
                     d       d
                     |       |
     ---------       A       B   ---------
     |       |       |       |   |       |
     | PHY@1 +-------+       +---+ PHY@1 |
     |       |       |       |   |       |
     ---------       |       |   ---------
     ---------       |       |   ---------
     |       |       |       |   |       |
     | PHY@2 +-------+       +---+ PHY@2 |
     |       |                   |       |
     ---------                   ---------

This framework configures the bus topology from device tree data.  The
mechanics of switching the multiplexer is left to device specific
drivers.

The follow-on patch contains a multiplexer driven by GPIO lines.

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-07 22:58:09 -04:00
David Daney
2510602200 netdev/of/phy: New function: of_mdio_find_bus().
Add of_mdio_find_bus() which allows an mii_bus to be located given its
associated the device tree node.

This is needed by the follow-on patch to add a driver for MDIO bus
multiplexers.

The of_mdiobus_register() function is modified so that the device tree
node is recorded in the mii_bus.  Then we can find it again by
iterating over all mdio_bus_class devices.

Because the OF device tree has now become an integral part of the
kernel, this can live in mdio_bus.c (which contains the needed
mdio_bus_class structure) instead of of_mdio.c.

Signed-off-by: David Daney <david.daney@cavium.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-07 22:58:09 -04:00
Tilman Schmidt
7dc2ce5f12 isdn/capi: elliminate capincci_find() in non-middleware case
If Kernel CAPI is compiled without CONFIG_ISDN_CAPI_MIDDLEWARE,
the structure retrieved via capincci_find() is never actually
used, so don't compile that function in that case.

Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-07 22:37:57 -04:00
Tilman Schmidt
7fdaadcc2e isdn/capi: fix readability damage
Fix up some of the readibility deterioration caused by the recent
whitespace coding style cleanup.

Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-07 22:37:57 -04:00
Tilman Schmidt
81fa7b8257 isdn/gigaset: unify function return values
Various functions in the Gigaset driver were using different
conventions for the meaning of their int return values.
Align them to the usual negative error numbers convention.

Inspired-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-07 22:37:56 -04:00