GitHub/exynos8895/android_kernel_samsung_universal8895.git
14 years agocan: mcp251x: increase rx_errors on overflow, not only rx_over_errors
Sascha Hauer [Thu, 30 Sep 2010 07:46:00 +0000 (09:46 +0200)]
can: mcp251x: increase rx_errors on overflow, not only rx_over_errors

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Acked-by: Wolfgang Grandegger <wg@grandegger.com>
14 years agocan: mcp251x: fix NOHZ local_softirq_pending 08 warning
Marc Kleine-Budde [Mon, 4 Oct 2010 08:50:51 +0000 (10:50 +0200)]
can: mcp251x: fix NOHZ local_softirq_pending 08 warning

This patch replaces netif_rx() with netif_rx_ni() which has to be used
from the threaded interrupt i.e. process context context.

Thanks to Christian Pellegrin for pointing at the right fix:
481a8199142c050b72bff8a1956a49fd0a75bbe0 by Oliver Hartkopp.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Acked-by: Wolfgang Grandegger <wg@grandegger.com>
14 years agotipc: Kill tipc_get_mode() completely.
David S. Miller [Mon, 18 Oct 2010 08:06:20 +0000 (01:06 -0700)]
tipc: Kill tipc_get_mode() completely.

It's completely unused and exporting a static symbol
makes no sense and breaks the build.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agotg3: Update version to 3.115
Matt Carlson [Thu, 14 Oct 2010 10:37:45 +0000 (10:37 +0000)]
tg3: Update version to 3.115

This patch updates the tg3 version to 3.115.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agotg3: Report invalid link from tg3_get_settings()
Matt Carlson [Thu, 14 Oct 2010 10:37:44 +0000 (10:37 +0000)]
tg3: Report invalid link from tg3_get_settings()

Currently the tg3 driver leaves the speed and duplex fields
uninitialized in tg3_get_settings() if the device is not up.  This can
lead to some strange deductions in certain versions of ethtool.  When
the device is up and the link is down, the driver reports SPEED_INVALID
and DUPLEX_INVALID for these fields.  This patch makes the presentation
consistent by returning SPEED_INVALID and DUPLEX_INVALID when the device
has not been brought up as well.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agotg3: Don't allocate jumbo ring for 5780 class devs
Matt Carlson [Thu, 14 Oct 2010 10:37:43 +0000 (10:37 +0000)]
tg3: Don't allocate jumbo ring for 5780 class devs

The 5714, 5715, and 5780 devices do not have a separate rx jumbo
producer ring.  This patch changes the code so that resources are not
allocated for it.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agotg3: Cleanup tg3_alloc_rx_skb()
Matt Carlson [Thu, 14 Oct 2010 10:37:42 +0000 (10:37 +0000)]
tg3: Cleanup tg3_alloc_rx_skb()

src_map is no longer used in tg3_alloc_rx_skb().  Remove it.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agotg3: Add EEE support
Matt Carlson [Thu, 14 Oct 2010 10:37:41 +0000 (10:37 +0000)]
tg3: Add EEE support

This patch adds Energy Efficient Ethernet (EEE) support for the 5718
device ID and the 57765 B0 asic revision.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agotg3: Add clause 45 register accessor methods
Matt Carlson [Thu, 14 Oct 2010 10:37:40 +0000 (10:37 +0000)]
tg3: Add clause 45 register accessor methods

This patch adds clause 45 register access methods.  They will be used in
the following patch.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agotg3: Disable unused transmit rings
Matt Carlson [Thu, 14 Oct 2010 10:37:39 +0000 (10:37 +0000)]
tg3: Disable unused transmit rings

This patch allows the driver to disable the additional transmit rings
available on the 5717 and 5719 devices.  This is not strictly necessary,
but is done anyways for correctness.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agotg3: Add support for selfboot format 1 v6
Matt Carlson [Thu, 14 Oct 2010 10:37:38 +0000 (10:37 +0000)]
tg3: Add support for selfboot format 1 v6

5718 B0 and 5719 devices will use a new selfboot firmware format.  This
patch adds code to detect the new format so that bootcode versions get
reported correctly.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agofib_hash: RCU conversion phase 2
Eric Dumazet [Thu, 14 Oct 2010 20:56:39 +0000 (20:56 +0000)]
fib_hash: RCU conversion phase 2

Get rid of fib_hash_lock rwlock.

The fn_zone hash table resize is the noticeable part of this patch.

I added a seqlock per fn_zone, so that readers can restart their lookup
in the (very rare) case a writer expanded the hash table.

Add rcu heads in fib_alias and fib_node, use call_rcu() to defer their
freeing, and use appropriate _rcu list manipulations.

Stress test (160.000.000 udp frames sent, IP route cache disabled to
mimic DDOS attack, FIB_HASH)

Before:
real 0m41.191s
user 0m13.137s
sys 8m55.241s

After:
real 0m38.091s
user 0m13.189s
sys 7m53.018s

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agofib_hash: RCU conversion phase 1
Eric Dumazet [Thu, 14 Oct 2010 20:53:34 +0000 (20:53 +0000)]
fib_hash: RCU conversion phase 1

First step for RCU conversion of fib_hash :

struct fn_zone are created and never deleted.

Very classic conversion, using rcu_assign_pointer(), rcu_dereference()
and rtnl_dereference() verbs.

__rcu markers on fz_next and fn_zone_list

They are created under RTNL, we dont need fib_hash_lock anymore in
fn_new_zone().

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agofib_hash: embed initial hash table in fn_zone
Eric Dumazet [Thu, 14 Oct 2010 20:53:04 +0000 (20:53 +0000)]
fib_hash: embed initial hash table in fn_zone

While looking for false sharing problems, I noticed
sizeof(struct fn_zone) was small (28 bytes) and possibly sharing a cache
line with an often written kernel structure.

Most of the time, fn_zone uses its initial hash table of 16 slots.

We can avoid the false sharing problem by embedding this initial hash
table in fn_zone itself, so that sizeof(fn_zone) > L1_CACHE_BYTES

We did a similar optimization in commit a6501e080c (Reduce memory needs
and speedup lookups)

Add a fz_revorder field to speedup fn_hash() a bit.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agodrivers/net/pch_gbe: Use DEFINE_PCI_DEVICE_TABLE
Joe Perches [Thu, 14 Oct 2010 09:55:50 +0000 (09:55 +0000)]
drivers/net/pch_gbe: Use DEFINE_PCI_DEVICE_TABLE

Use the standard macro to put this table in __devinitconst.

Compiled, untested.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agonetns: reorder fields in struct net
Eric Dumazet [Thu, 14 Oct 2010 05:56:18 +0000 (05:56 +0000)]
netns: reorder fields in struct net

In a network bench, I noticed an unfortunate false sharing between
'loopback_dev' and 'count' fields in "struct net".

'count' is written each time a socket is created or destroyed, while
loopback_dev might be often read in routing code.

Move loopback_dev in a read mostly section of "struct net"

Note: struct netns_xfrm is cache line aligned on SMP.
(It contains a "struct dst_ops")
Move it at the end to avoid holes, and reduce sizeof(struct net) by 128
bytes on ia32.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agotcp: use correct counters in CA_CWR state too
Ilpo Järvinen [Thu, 14 Oct 2010 01:52:09 +0000 (01:52 +0000)]
tcp: use correct counters in CA_CWR state too

As CWR is stronger than CA_Disorder state, we can miscount
SACK/Reno failure into other timeouts. Not a bad problem as
it can happen only due to ECN, FRTO detecting spurious RTO
or xmit error which are the only callers of tcp_enter_cwr.
And even then losses and RTO must still follow thereafter
to actually end up into the relevant code paths.

Compile tested.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agotcp: sack lost marking fixes
Ilpo Järvinen [Thu, 14 Oct 2010 01:42:30 +0000 (01:42 +0000)]
tcp: sack lost marking fixes

When only fast rexmit should be done, tcp_mark_head_lost marks
L too far. Also, sacked_upto below 1 is perfectly valid number,
the packets == 0 then needs to be trapped elsewhere.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agostmmac: remove ifdef NETIF_F_TSO from stmmac_ethtool.c
Giuseppe Cavallaro [Sun, 17 Oct 2010 20:43:56 +0000 (13:43 -0700)]
stmmac: remove ifdef NETIF_F_TSO from stmmac_ethtool.c

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Reported-by: Armando Visconti <armando.visconti@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoniu: introduce temp variables to avoid sparse warnings when swapping in-situ
Harvey Harrison [Wed, 13 Oct 2010 18:59:13 +0000 (18:59 +0000)]
niu: introduce temp variables to avoid sparse warnings when swapping in-situ

Suppress a large block of warnings like:
drivers/net/niu.c:7094:38: warning: incorrect type in assignment (different base types)
drivers/net/niu.c:7094:38:    expected restricted __be32 [usertype] ip4src
drivers/net/niu.c:7094:38:    got unsigned long long
drivers/net/niu.c:7104:17: warning: cast from restricted __be32
...

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agonet: move MII outside of NET_ETHERNET, fix kconfig warning
Randy Dunlap [Wed, 13 Oct 2010 15:18:59 +0000 (15:18 +0000)]
net: move MII outside of NET_ETHERNET, fix kconfig warning

We have USB, PCMCIA, and gigabit ethernet drivers that select
MII even though NET_ETHERNET is not enabled, so make MII not
be dependent on NET_ETHERNET.  It is still dependent on NET
and NETDEVICES.

Fixes kconfig unmet dependency warning (shortened, was very long string):

warning: (ARM_AT91_ETHER && NETDEVICES && NET_ETHERNET && ARM && ARCH_AT91RM9200 || ARM_KS8695_ETHER && NETDEVICES && NET_ETHERNET && ARM && ARCH_KS8695 || ... || IP1000 && NETDEVICES && NETDEV_1000 && PCI && EXPERIMENTAL || HAMACHI && NETDEVICES && NETDEV_1000 && PCI || R8169 && NETDEVICES && NETDEV_1000 && PCI || SIS190 && NETDEVICES && NETDEV_1000 && PCI || VIA_VELOCITY && NETDEVICES && NETDEV_1000 && PCI || ATL1 && NETDEVICES && NETDEV_1000 && PCI || ATL1E && NETDEVICES && NETDEV_1000 && PCI && EXPERIMENTAL || ATL1C && NETDEVICES && NETDEV_1000 && PCI && EXPERIMENTAL || JME && NETDEVICES && NETDEV_1000 && PCI || STMMAC_ETH && NETDEV_1000 && NETDEVICES && HAS_IOMEM || USB_PEGASUS && NETDEVICES && USB && NET || USB_RTL8150 && NETDEVICES && USB && NET && EXPERIMENTAL || USB_USBNET && NETDEVICES && USB && NET || PCMCIA_SMC91C92 && NETDEVICES && NET_PCMCIA && PCMCIA) selects MII which has unmet direct dependencies (NETDEVICES && NET_ETHERNET)

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Acked-by: Jeff Garzik <jgarzik@pobox.com> [2006-NOV-30]
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoinfiniband: fix mlx4 kconfig dependency warning
Randy Dunlap [Wed, 13 Oct 2010 15:12:53 +0000 (15:12 +0000)]
infiniband: fix mlx4 kconfig dependency warning

Fix kconfig dependency warning to satisfy dependencies:

warning: (MLX4_EN && NETDEVICES && NETDEV_10000 && PCI && INET || MLX4_INFINIBAND && INFINIBAND) selects MLX4_CORE which has unmet direct dependencies (NETDEVICES && NETDEV_10000 && PCI)

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agostmmac: make function tables const
stephen hemminger [Wed, 13 Oct 2010 14:51:25 +0000 (14:51 +0000)]
stmmac: make function tables const

These tables only contain function pointers.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: Gustavo F. Padovan <padovan@profusion.mobi>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agostmmac: make ethtool functions local
stephen hemminger [Wed, 13 Oct 2010 14:50:31 +0000 (14:50 +0000)]
stmmac: make ethtool functions local

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: Gustavo F. Padovan <padovan@profusion.mobi>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agotipc: cleanup function namespace
stephen hemminger [Wed, 13 Oct 2010 13:20:35 +0000 (13:20 +0000)]
tipc: cleanup function namespace

Do some cleanups of TIPC based on make namespacecheck
  1. Don't export unused symbols
  2. Eliminate dead code
  3. Make functions and variables local
  4. Rename buf_acquire to tipc_buf_acquire since it is used in several files

Compile tested only.
This make break out of tree kernel modules that depend on TIPC routines.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: Jon Maloy <jon.maloy@ericsson.com>
Acked-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agovia-velocity: forced 1000 Mbps mode support.
françois romieu [Wed, 13 Oct 2010 09:26:05 +0000 (09:26 +0000)]
via-velocity: forced 1000 Mbps mode support.

Full duplex only. Half duplex 1000 Mbps is not supported.

Signed-off-by: David Lv <DavidLv@viatech.com.cn>
Acked-by: Francois Romieu <romieu@fr.zoreil.com>
Tested-by: Seguier Regis <rseguier@e-teleport.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agofib: avoid false sharing on fib_table_hash
Eric Dumazet [Wed, 13 Oct 2010 08:22:03 +0000 (08:22 +0000)]
fib: avoid false sharing on fib_table_hash

While doing profile analysis, I found fib_hash_table was sometime in a
cache line shared by a possibly often written kernel structure.

(CONFIG_IP_ROUTE_MULTIPATH || !CONFIG_IPV6_MULTIPLE_TABLES)

It's hard to detect because not easily reproductible.

Make sure we allocate a full cache line to keep this shared in all cpus
caches.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agofib_trie: use fls() instead of open coded loop
Eric Dumazet [Wed, 13 Oct 2010 06:56:11 +0000 (06:56 +0000)]
fib_trie: use fls() instead of open coded loop

fib_table_lookup() might use fls() to speedup an open coded loop.

Noticed while doing a profile analysis.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agofib: remove a useless synchronize_rcu() call
Eric Dumazet [Wed, 13 Oct 2010 04:43:04 +0000 (04:43 +0000)]
fib: remove a useless synchronize_rcu() call

fib_nl_delrule() calls synchronize_rcu() for no apparent reason,
while rtnl is held.

I suspect it was done to avoid an atomic_inc_not_zero() in
fib_rules_lookup(), which commit 7fa7cb7109d07 added anyway.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agofib6: use FIB_LOOKUP_NOREF in fib6_rule_lookup()
Eric Dumazet [Wed, 13 Oct 2010 02:45:40 +0000 (02:45 +0000)]
fib6: use FIB_LOOKUP_NOREF in fib6_rule_lookup()

Avoid two atomic ops on found rule in fib6_rule_lookup()

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agosundance: Add initial ethtool stats support
Denis Kirjanov [Wed, 13 Oct 2010 00:56:09 +0000 (00:56 +0000)]
sundance: Add initial ethtool stats support

Add ethtool stats support.

Signed-off-by: Denis Kirjanov <dkirjanov@kernel.org>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agopch_gbe: fix if condition in set_settings()
Dan Carpenter [Tue, 12 Oct 2010 23:36:19 +0000 (23:36 +0000)]
pch_gbe: fix if condition in set_settings()

There were no curly braces in this if condition so it always enabled full
duplex.

And ecmd->speed is an unsigned short so it is never equal to -1.  The
effect is that mii_ethtool_sset() fails with -EINVAL and an error is
printed to dmesg.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agodnet: mark methods static and annotate for correct endianness
Harvey Harrison [Tue, 12 Oct 2010 22:20:34 +0000 (22:20 +0000)]
dnet: mark methods static and annotate for correct endianness

Their doesn't appear to be bugs with the endianness handling here, just get the
annotations right to keep sparse happy.

Suppresses the following sparse warnings:
drivers/net/dnet.c:30:5: warning: symbol 'dnet_readw_mac' was not declared. Should it be static?
drivers/net/dnet.c:49:6: warning: symbol 'dnet_writew_mac' was not declared. Should it be static?
drivers/net/dnet.c:364:5: warning: symbol 'dnet_phy_marvell_fixup' was not declared. Should it be static?
drivers/net/dnet.c:66:13: warning: incorrect type in assignment (different base types)
drivers/net/dnet.c:66:13:    expected unsigned short [unsigned] [usertype] tmp
drivers/net/dnet.c:66:13:    got restricted __be16 [usertype] <noident>
drivers/net/dnet.c:68:13: warning: incorrect type in assignment (different base types)
drivers/net/dnet.c:68:13:    expected unsigned short [unsigned] [usertype] tmp
drivers/net/dnet.c:68:13:    got restricted __be16 [usertype] <noident>
drivers/net/dnet.c:70:13: warning: incorrect type in assignment (different base types)
drivers/net/dnet.c:70:13:    expected unsigned short [unsigned] [usertype] tmp
drivers/net/dnet.c:70:13:    got restricted __be16 [usertype] <noident>
drivers/net/dnet.c:92:27: warning: cast to restricted __be16
drivers/net/dnet.c:94:33: warning: cast to restricted __be16
drivers/net/dnet.c:96:33: warning: cast to restricted __be16

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agocxgb4vf: make single bit signed bitfields unsigned
Harvey Harrison [Tue, 12 Oct 2010 21:52:26 +0000 (21:52 +0000)]
cxgb4vf: make single bit signed bitfields unsigned

Single bit signed bitfields don't make a lot of sense, noticed by sparse:
drivers/net/cxgb4vf/t4vf_common.h:135:31: error: dubious one-bit signed bitfield
drivers/net/cxgb4vf/t4vf_common.h:136:36: error: dubious one-bit signed bitfield
drivers/net/cxgb4vf/t4vf_common.h:137:36: error: dubious one-bit signed bitfield
drivers/net/cxgb4vf/t4vf_common.h:138:36: error: dubious one-bit signed bitfield
drivers/net/cxgb4vf/t4vf_common.h:139:36: error: dubious one-bit signed bitfield
drivers/net/cxgb4vf/t4vf_common.h:140:31: error: dubious one-bit signed bitfield
drivers/net/cxgb4vf/t4vf_common.h:141:31: error: dubious one-bit signed bitfield
drivers/net/cxgb4vf/t4vf_common.h:142:35: error: dubious one-bit signed bitfield
drivers/net/cxgb4vf/t4vf_common.h:143:35: error: dubious one-bit signed bitfield
drivers/net/cxgb4vf/t4vf_common.h:154:27: error: dubious one-bit signed bitfield
drivers/net/cxgb4vf/t4vf_common.h:155:26: error: dubious one-bit signed bitfield
drivers/net/cxgb4vf/t4vf_common.h:156:27: error: dubious one-bit signed bitfield
drivers/net/cxgb4vf/t4vf_common.h:157:26: error: dubious one-bit signed bitfield

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agonet: allocate skbs on local node
Eric Dumazet [Mon, 11 Oct 2010 19:05:25 +0000 (19:05 +0000)]
net: allocate skbs on local node

commit b30973f877 (node-aware skb allocation) spread a wrong habit of
allocating net drivers skbs on a given memory node : The one closest to
the NIC hardware. This is wrong because as soon as we try to scale
network stack, we need to use many cpus to handle traffic and hit
slub/slab management on cross-node allocations/frees when these cpus
have to alloc/free skbs bound to a central node.

skb allocated in RX path are ephemeral, they have a very short
lifetime : Extra cost to maintain NUMA affinity is too expensive. What
appeared as a nice idea four years ago is in fact a bad one.

In 2010, NIC hardwares are multiqueue, or we use RPS to spread the load,
and two 10Gb NIC might deliver more than 28 million packets per second,
needing all the available cpus.

Cost of cross-node handling in network and vm stacks outperforms the
small benefit hardware had when doing its DMA transfert in its 'local'
memory node at RX time. Even trying to differentiate the two allocations
done for one skb (the sk_buff on local node, the data part on NIC
hardware node) is not enough to bring good performance.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agor8169: use 50% less ram for RX ring
Eric Dumazet [Mon, 11 Oct 2010 11:17:47 +0000 (11:17 +0000)]
r8169: use 50% less ram for RX ring

Using standard skb allocations in r8169 leads to order-3 allocations (if
PAGE_SIZE=4096), because NIC needs 16383 bytes, and skb overhead makes
this bigger than 16384 -> 32768 bytes per "skb"

Using kmalloc() permits to reduce memory requirements of one r8169 nic
by 4Mbytes. (256 frames * 16Kbytes). This is fine since a hardware bug
requires us to copy incoming frames, so we build real skb when doing
this copy.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoixgbe: DCB: remove DCB check config
John Fastabend [Fri, 15 Oct 2010 16:27:38 +0000 (09:27 -0700)]
ixgbe: DCB: remove DCB check config

Remove a DCB check config from DCB configuration we
continue to configure DCB even if it fails so don't
even bother to check.  Plus user space (lldpad) checks
this before programming the hw anyways.

Worse case is we program some values into the hw that
don't make total sense resulting in incorrect bandwidth
allocation.

Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoigb: add check for fiber/serdes devices to igb_set_spd_dplx;
Carolyn Wyborny [Tue, 12 Oct 2010 22:27:02 +0000 (22:27 +0000)]
igb: add check for fiber/serdes devices to igb_set_spd_dplx;

Signed-off-by: Carolyn Wyborny <carolyn.wyborny@intel.com>
Tested-by: Emil Tantilov <emil.s.tantilov@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoixgbe: declare functions as static
Emil Tantilov [Tue, 12 Oct 2010 22:20:59 +0000 (22:20 +0000)]
ixgbe: declare functions as static

Following patch fixes warnings reported by `make namespacecheck`

Reported by Stephen Hemminger

CC: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Tested-by: Stephen Ko <stephen.s.ko@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoixgbe: remove unused functions
Emil Tantilov [Tue, 12 Oct 2010 22:20:34 +0000 (22:20 +0000)]
ixgbe: remove unused functions

Remove functions that are declared, but not used in the driver.
This patch fixes warnings reported by `make namespacecheck`

Reported by Stephen Hemminger

CC: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Tested-by: Stephen Ko <stephen.s.ko@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agocnic: Add support for 57712 device
Michael Chan [Wed, 13 Oct 2010 14:06:51 +0000 (14:06 +0000)]
cnic: Add support for 57712 device

Add new interrupt ack functions and other hardware interface logic to
support the new device.

Update version to 2.2.6.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agocnic: Decouple uio close from cnic shutdown
Michael Chan [Wed, 13 Oct 2010 14:06:50 +0000 (14:06 +0000)]
cnic: Decouple uio close from cnic shutdown

During cnic shutdown, the original driver code requires userspace to
close the uio device within a few seconds.  This doesn't always happen
as the userapp may be hung or otherwise take a long time to close.  The
system may crash when this happens.

We fix the problem by decoupling the uio structures from the cnic
structures during cnic shutdown.  We do not unregister the uio device
until the cnic driver is unloaded.  This eliminates the unreliable wait
loop for uio to close.

All uio structures are kept in a linked list.  If the device is shutdown
and later brought back up again, the uio strcture will be found in the
linked list and coupled back to the cnic structures.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agocnic: Add cnic_uio_dev struct
Michael Chan [Wed, 13 Oct 2010 14:06:49 +0000 (14:06 +0000)]
cnic: Add cnic_uio_dev struct

and put all uio related structures and ring buffers in it.  This allows
uio operations to be done independent of the cnic device structures.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agocnic: Add cnic_free_uio()
Michael Chan [Wed, 13 Oct 2010 14:06:48 +0000 (14:06 +0000)]
cnic: Add cnic_free_uio()

to free all UIO related structures.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agocnic: Defer iscsi connection cleanup
Michael Chan [Wed, 13 Oct 2010 14:06:47 +0000 (14:06 +0000)]
cnic: Defer iscsi connection cleanup

The bnx2x devices require a 2 second quiet time before sending the last
RAMROD command to destroy a connection.  This sleep wait adds up to a
long delay when iscsid is serially destroying maultiple connections.

Create a workqueue to perform the final connection cleanup in the
background to speed up the process.  This significantly speeds up the
process as the wait time can be done in parallel for multiple connections.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agocnic: Add cnic_bnx2x_destroy_ramrod()
Michael Chan [Wed, 13 Oct 2010 14:06:46 +0000 (14:06 +0000)]
cnic: Add cnic_bnx2x_destroy_ramrod()

Refactoring code for the next patch to defer connection clean up.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agocnic: Convert ctx_flags to bit fields
Michael Chan [Wed, 13 Oct 2010 14:06:45 +0000 (14:06 +0000)]
cnic: Convert ctx_flags to bit fields

so that we can additional bit definitions without requiring a spinlock.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agocnic: Add common cnic_request_irq()
Michael Chan [Wed, 13 Oct 2010 14:06:44 +0000 (14:06 +0000)]
cnic: Add common cnic_request_irq()

to reduce some duplicate code.  Also, use tasklet_kill() in
cnic_free_irq() to wait for the cnic_irq_task to complete.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoDocumentation: Update Phonet doc for Pipe controller changes
Kumar Sanghvi [Tue, 12 Oct 2010 20:17:25 +0000 (20:17 +0000)]
Documentation: Update Phonet doc for Pipe controller changes

Updates to Phonet doc for Pipe controller 'connect' socket
implementation and changes related to socket options.

Signed-off-by: Kumar Sanghvi <kumar.sanghvi@stericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoPhonet: 'connect' socket implementation for Pipe controller
Kumar Sanghvi [Tue, 12 Oct 2010 20:14:43 +0000 (20:14 +0000)]
Phonet: 'connect' socket implementation for Pipe controller

Based on suggestion by Rémi Denis-Courmont to implement 'connect'
for Pipe controller logic,  this patch implements 'connect' socket
call for the Pipe controller logic.
The patch does following:-
- Removes setsockopts for PNPIPE_CREATE and PNPIPE_DESTROY
- Adds setsockopt for setting the Pipe handle value
- Implements connect socket call
- Updates the Pipe controller logic

User-space should now follow below sequence with Pipe controller:-
-socket
-bind
-setsockopt for PNPIPE_PIPE_HANDLE
-connect
-setsockopt for PNPIPE_ENCAP_IP
-setsockopt for PNPIPE_ENABLE

GPRS/3G data has been tested working fine with this.

Signed-off-by: Kumar Sanghvi <kumar.sanghvi@stericsson.com>
Acked-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agotipc: clean out all instances of #if 0'd unused code
Paul Gortmaker [Tue, 12 Oct 2010 14:25:58 +0000 (14:25 +0000)]
tipc: clean out all instances of #if 0'd unused code

Remove all instances of legacy, or as yet to be implemented code
that is currently living within an #if 0 ... #endif block.
In the rare instance that some of it be needed in the future,
it can still be dragged out of history, but there is no need
for it to sit in mainline.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agos390: ctcm_mpc: Fix build after netdev refcount changes.
David S. Miller [Wed, 13 Oct 2010 16:11:26 +0000 (09:11 -0700)]
s390: ctcm_mpc: Fix build after netdev refcount changes.

Reported-by: Sachin Sant <sachinp@in.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agonet: percpu net_device refcount
Eric Dumazet [Mon, 11 Oct 2010 10:22:12 +0000 (10:22 +0000)]
net: percpu net_device refcount

We tried very hard to remove all possible dev_hold()/dev_put() pairs in
network stack, using RCU conversions.

There is still an unavoidable device refcount change for every dst we
create/destroy, and this can slow down some workloads (routers or some
app servers, mmap af_packet)

We can switch to a percpu refcount implementation, now dynamic per_cpu
infrastructure is mature. On a 64 cpus machine, this consumes 256 bytes
per device.

On x86, dev_hold(dev) code :

before
        lock    incl 0x280(%ebx)
after:
        movl    0x260(%ebx),%eax
        incl    fs:(%eax)

Stress bench :

(Sending 160.000.000 UDP frames,
IP route cache disabled, dual E5540 @2.53GHz,
32bit kernel, FIB_TRIE)

Before:

real    1m1.662s
user    0m14.373s
sys     12m55.960s

After:

real    0m51.179s
user    0m15.329s
sys     10m15.942s

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agobnx2x: Fixing a typo: added a missing RSS enablement
Dmitry Kravkov [Tue, 12 Oct 2010 09:02:21 +0000 (09:02 +0000)]
bnx2x: Fixing a typo: added a missing RSS enablement

Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Vladislav Zolotarov <vladz@broadcom.com>
Tested-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoMerge branch 'dccp' of git://eden-feed.erg.abdn.ac.uk/net-next-2.6
David S. Miller [Tue, 12 Oct 2010 18:43:42 +0000 (11:43 -0700)]
Merge branch 'dccp' of git://eden-feed.erg.abdn.ac.uk/net-next-2.6

14 years agodccp: cosmetics - warning format
Gerrit Renker [Mon, 11 Oct 2010 18:44:42 +0000 (20:44 +0200)]
dccp: cosmetics - warning format

This  omits the redundant "DCCP:" in warning messages, since DCCP_WARN() already
echoes the function name, avoiding messages like

   kernel: [10988.766503] dccp_close: DCCP: ABORT -- 209 bytes unread

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
14 years agodccp: schedule an Ack when receiving timestamps
Gerrit Renker [Mon, 11 Oct 2010 18:41:13 +0000 (20:41 +0200)]
dccp: schedule an Ack when receiving timestamps

This schedules an Ack when receiving a timestamp, exploiting the
existing inet_csk_schedule_ack() function, saving one case in the
`dccp_ack_pending()' function.

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
14 years agodccp: generalise data-loss condition
Ivo Calado [Mon, 11 Oct 2010 18:40:04 +0000 (20:40 +0200)]
dccp: generalise data-loss condition

This patch generalises the task of determining data loss from RFC 4340, 7.7.1.

Let S_A, S_B be sequence numbers such that S_B is "after" S_A, and let
N_B be the NDP count of packet S_B. Then, using modulo-2^48 arithmetic,
 D = S_B - S_A - 1  is an upper bound of the number of lost data packets,
 D - N_B            is an approximation of the number of lost data packets
                    (there are cases where this is not exact).

The patch implements this as
 dccp_loss_count(S_A, S_B, N_B) := max(S_B - S_A - 1 - N_B, 0)

Signed-off-by: Ivo Calado <ivocalado@embedded.ufcg.edu.br>
Signed-off-by: Erivaldo Xavier <desadoc@gmail.com>
Signed-off-by: Leandro Sales <leandroal@gmail.com>
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
14 years agodccp: remove unused argument in CCID tx function
Gerrit Renker [Mon, 11 Oct 2010 18:37:38 +0000 (20:37 +0200)]
dccp: remove unused argument in CCID tx function

This removes the argument `more' from ccid_hc_tx_packet_sent, since it was
nowhere used in the entire code.

(Btw, this argument was not even used in the original KAME code where the
 function initially came from; compare the variable moreToSend in the
 freebsd61-dccp-kame-28.08.2006.patch kept by Emmanuel Lochin.)

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
14 years agodccp: merge now-reduced connect_init() function
Gerrit Renker [Mon, 11 Oct 2010 18:36:33 +0000 (20:36 +0200)]
dccp: merge now-reduced connect_init() function

After moving the assignment of GAR/ISS from dccp_connect_init() to
dccp_transmit_skb(), the former function becomes very small, so that
a merger with dccp_connect() suggests itself.

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
14 years agodccp: fix the adjustments to AWL and SWL
Gerrit Renker [Mon, 11 Oct 2010 18:35:40 +0000 (20:35 +0200)]
dccp: fix the adjustments to AWL and SWL

This fixes a problem and a potential loophole with regard to seqno/ackno
validity: currently the initial adjustments to AWL/SWL are only performed
once at the begin of the connection, during the handshake.

Since the Sequence Window feature is always greater than Wmin=32 (7.5.2),
it is however necessary to perform these adjustments at least for the first
W/W' (variables as per 7.5.1) packets in the lifetime of a connection.

This requirement is complicated by the fact that W/W' can change at any time
during the lifetime of a connection.

Therefore it is better to perform that safety check each time SWL/AWL are
updated, as implemented by the patch.

A second problem solved by this patch is that the remote/local Sequence Window
feature values (which set the bounds for AWL/SWL/SWH) are undefined until the
feature negotiation has completed.

During the initial handshake we have more stringent sequence number protection;
the changes added by this patch effect that {A,S}W{L,H} are within the correct
bounds at the instant that feature negotiation completes (since the SeqWin
feature activation handlers call dccp_update_gsr/gss()).

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
14 years agobnx2: Enable AER on PCIE devices only
Michael Chan [Mon, 11 Oct 2010 23:12:28 +0000 (16:12 -0700)]
bnx2: Enable AER on PCIE devices only

To prevent unnecessary error message.  pci_save_state() is also moved to
the end of ->probe() so that all PCI config, including AER state, will be
saved.

Update version to 2.0.18.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Reviewed-by: Benjamin Li <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agobnx2: Update firmware to 6.0.x.
Michael Chan [Mon, 11 Oct 2010 23:12:00 +0000 (16:12 -0700)]
bnx2: Update firmware to 6.0.x.

- Improved flow control and simplified interface
- Use hardware RSS indirection table instead of the slower firmware-
  based table
- Lower latency interrupt on 5709

Signed-off-by: Michael Chan <mchan@broadcom.com>
Reviewed-by: Benjamin Li <benli@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoneigh: reorder struct neighbour fields
Eric Dumazet [Mon, 11 Oct 2010 12:20:54 +0000 (12:20 +0000)]
neigh: reorder struct neighbour fields

Le mardi 12 octobre 2010 à 00:02 +0200, Eric Dumazet a écrit :
> Here is the followup patch.
>
> Thanks !
>

Oops, this was an old version, the up2date ones also took care of "used"
field.

I guess its time for a sleep, sorry again.

[PATCH net-next V2] neigh: reorder struct neighbour fields

(refcnt) and (ha_lock, ha, used, dev, output, ops, primary_key) should
be placed on a separate cache lines.

refcnt can be often written, while other fields are mostly read.

This gave me good result on stress test :

before:

real    0m45.570s
user    0m15.525s
sys     9m56.669s

After:

real    0m41.841s
user    0m15.261s
sys     8m45.949s

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agonet dst: use a percpu_counter to track entries
Eric Dumazet [Fri, 8 Oct 2010 06:37:34 +0000 (06:37 +0000)]
net dst: use a percpu_counter to track entries

struct dst_ops tracks number of allocated dst in an atomic_t field,
subject to high cache line contention in stress workload.

Switch to a percpu_counter, to reduce number of time we need to dirty a
central location. Place it on a separate cache line to avoid dirtying
read only fields.

Stress test :

(Sending 160.000.000 UDP frames,
IP route cache disabled, dual E5540 @2.53GHz,
32bit kernel, FIB_TRIE, SLUB/NUMA)

Before:

real    0m51.179s
user    0m15.329s
sys     10m15.942s

After:

real 0m45.570s
user 0m15.525s
sys 9m56.669s

With a small reordering of struct neighbour fields, subject of a
following patch, (to separate refcnt from other read mostly fields)

real 0m41.841s
user 0m15.261s
sys 8m45.949s

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoneigh: Protect neigh->ha[] with a seqlock
Eric Dumazet [Thu, 7 Oct 2010 10:44:07 +0000 (10:44 +0000)]
neigh: Protect neigh->ha[] with a seqlock

Add a seqlock in struct neighbour to protect neigh->ha[], and avoid
dirtying neighbour in stress situation (many different flows / dsts)

Dirtying takes place because of read_lock(&n->lock) and n->used writes.

Switching to a seqlock, and writing n->used only on jiffies changes
permits less dirtying.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoMerge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
David S. Miller [Mon, 11 Oct 2010 19:30:34 +0000 (12:30 -0700)]
Merge branch 'master' of /linux/kernel/git/davem/net-2.6

Conflicts:
net/core/ethtool.c

14 years agonet: clear heap allocations for privileged ethtool actions
Kees Cook [Mon, 11 Oct 2010 19:23:25 +0000 (12:23 -0700)]
net: clear heap allocations for privileged ethtool actions

Several other ethtool functions leave heap uncleared (potentially) by
drivers. Some interfaces appear safe (eeprom, etc), in that the sizes
are well controlled. In some situations (e.g. unchecked error conditions),
the heap will remain unchanged in areas before copying back to userspace.
Note that these are less of an issue since these all require CAP_NET_ADMIN.

Cc: stable@kernel.org
Signed-off-by: Kees Cook <kees.cook@canonical.com>
Acked-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoNET: pch, fix use after free
Jiri Slaby [Sun, 10 Oct 2010 23:26:56 +0000 (23:26 +0000)]
NET: pch, fix use after free

Stanse found that pch_gbe_xmit_frame uses skb after it is freed. Fix
that.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Masayuki Ohtake <masa-korg@dsn.okisemi.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoNET: wimax, fix use after free
Jiri Slaby [Sun, 10 Oct 2010 23:26:58 +0000 (23:26 +0000)]
NET: wimax, fix use after free

Stanse found that i2400m_rx frees skb, but still uses skb->len even
though it has skb_len defined. So use skb_len properly in the code.

And also define it unsinged int rather than size_t to solve
compilation warnings.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
Cc: linux-wimax@intel.com
Acked-by: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoATM: iphase, remove sleep-inside-atomic
Jiri Slaby [Sun, 10 Oct 2010 23:26:57 +0000 (23:26 +0000)]
ATM: iphase, remove sleep-inside-atomic

Stanse found that ia_init_one locks a spinlock and inside of that it
calls ia_start which calls:
* request_irq
* tx_init which does kmalloc(GFP_KERNEL)

Both of them can thus sleep and result in a deadlock. I don't see a
reason to have a per-device spinlock there which is used only there
and inited right before the lock location. So remove it completely.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Chas Williams <chas@cmf.nrl.navy.mil>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoATM: mpc, fix use after free
Jiri Slaby [Sun, 10 Oct 2010 22:46:34 +0000 (22:46 +0000)]
ATM: mpc, fix use after free

Stanse found that mpc_push frees skb and then it dereferences it. It
is a typo, new_skb should be dereferenced there.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoATM: solos-pci, remove use after free
Jiri Slaby [Sun, 10 Oct 2010 21:50:44 +0000 (21:50 +0000)]
ATM: solos-pci, remove use after free

Stanse found we do in console_show:
  kfree_skb(skb);
  return skb->len;
which is not good. Fix that by remembering the len and use it in the
function instead.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Chas Williams <chas@cmf.nrl.navy.mil>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoneigh: speedup neigh_hh_init()
Eric Dumazet [Mon, 11 Oct 2010 16:16:57 +0000 (09:16 -0700)]
neigh: speedup neigh_hh_init()

When a new dst is used to send a frame, neigh_resolve_output() tries to
associate an struct hh_cache to this dst, calling neigh_hh_init() with
the neigh rwlock write locked.

Most of the time, hh_cache is already known and linked into neighbour,
so we find it and increment its refcount.

This patch changes the logic so that we call neigh_hh_init() with
neighbour lock read locked only, so that fast path can be run in
parallel by concurrent cpus.

This brings part of the speedup we got with commit c7d4426a98a5f
(introduce DST_NOCACHE flag) for non cached dsts, even for cached ones,
removing one of the contention point that routers hit on multiqueue
enabled machines.

Further improvements would need to use a seqlock instead of an rwlock to
protect neigh->ha[], to not dirty neigh too often and remove two atomic
ops.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agonet/fec: carrier off initially to avoid root mount failure
Oskar Schirmer [Thu, 7 Oct 2010 02:30:30 +0000 (02:30 +0000)]
net/fec: carrier off initially to avoid root mount failure

with hardware slow in negotiation, the system did freeze
while trying to mount root on nfs at boot time.

the link state has not been initialised so network stack
tried to start transmission right away. this caused instant
retries, as the driver solely stated business upon link down,
rendering the system unusable.

notify carrier off initially to prevent transmission until
phylib will report link up.

Signed-off-by: Oskar Schirmer <oskar@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoirda: Fix heap memory corruption in iriap.c
Samuel Ortiz [Tue, 5 Oct 2010 23:03:12 +0000 (01:03 +0200)]
irda: Fix heap memory corruption in iriap.c

While parsing the GetValuebyClass command frame, we could potentially write
passed the skb->data pointer.

Cc: stable@kernel.org
Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com>
Signed-off-by: Samuel Ortiz <samuel@sortiz.org>
14 years agoirda: Fix parameter extraction stack overflow
Samuel Ortiz [Sun, 10 Oct 2010 23:17:56 +0000 (01:17 +0200)]
irda: Fix parameter extraction stack overflow

Cc: stable@kernel.org
Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com>
Signed-off-by: Samuel Ortiz <samuel@sortiz.org>
14 years agoirda: Test index before read in stir421x_patch_device()
Roel Kluin [Mon, 4 Oct 2010 23:30:02 +0000 (01:30 +0200)]
irda: Test index before read in stir421x_patch_device()

Test whether index exceeds fw->size before reading the element

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Samuel Ortiz <samuel@sortiz.org>
14 years agoirda: Remove BKL instances from irnet
Samuel Ortiz [Mon, 4 Oct 2010 23:24:20 +0000 (01:24 +0200)]
irda: Remove BKL instances from irnet

The code intends to lock the irnet_socket, so adding a mutex to it allows
for a complet BKL removal.

Signed-off-by: Samuel Ortiz <samuel@sortiz.org>
14 years agoirda: Remove BKL instances from af_irda.c
Samuel Ortiz [Sun, 10 Oct 2010 22:46:51 +0000 (00:46 +0200)]
irda: Remove BKL instances from af_irda.c

Most of the times, lock_kernel() was pointless or could simply be replaced
by lock_sock().

Signed-off-by: Samuel Ortiz <samuel@sortiz.org>
14 years agosundance: get_stats proper locking
Eric Dumazet [Sat, 9 Oct 2010 02:17:01 +0000 (02:17 +0000)]
sundance: get_stats proper locking

sundance get_stats() should not be run concurrently, add a lock to avoid
potential losses.

Note: Remove unused rx_lock field

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agonet/tg3: simplify conditional
Nicolas Kaiser [Thu, 7 Oct 2010 23:29:27 +0000 (23:29 +0000)]
net/tg3: simplify conditional

Simplify: ((a && !b) || (!a && b)) => (a != b)

Signed-off-by: Nicolas Kaiser <nikai@nikai.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoehea: simplify conditional
Nicolas Kaiser [Thu, 7 Oct 2010 13:14:50 +0000 (13:14 +0000)]
ehea: simplify conditional

Simplify: ((a && b) || (!a && !b)) => (a == b)

Signed-off-by: Nicolas Kaiser <nikai@nikai.net>
Acked-by: Breno Leitao <leitao@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agonet_sched: use __TCA_HTB_MAX and TCA_HTB_MAX
Changli Gao [Thu, 30 Sep 2010 06:17:44 +0000 (06:17 +0000)]
net_sched: use __TCA_HTB_MAX and TCA_HTB_MAX

Signed-off-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agor8169: use device model DMA API
Stanislaw Gruszka [Fri, 8 Oct 2010 04:25:01 +0000 (04:25 +0000)]
r8169: use device model DMA API

Use DMA API as PCI equivalents will be deprecated. This change also
allow to allocate with GFP_KERNEL where possible.

Tested-by: Neal Becker <ndbecker2@gmail.com>
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agor8169: allocate with GFP_KERNEL flag when able to sleep
Stanislaw Gruszka [Fri, 8 Oct 2010 04:25:00 +0000 (04:25 +0000)]
r8169: allocate with GFP_KERNEL flag when able to sleep

We have fedora bug report where driver fail to initialize after
suspend/resume because of memory allocation errors:
https://bugzilla.redhat.com/show_bug.cgi?id=629158

To fix use GFP_KERNEL allocation where possible.

Tested-by: Neal Becker <ndbecker2@gmail.com>
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agonet: Fix rxq ref counting
Tom Herbert [Thu, 7 Oct 2010 10:09:10 +0000 (10:09 +0000)]
net: Fix rxq ref counting

The rx->count reference is used to track reference counts to the
number of rx-queue kobjects created for the device.  This patch
eliminates initialization of the counter in netif_alloc_rx_queues
and instead increments the counter each time a kobject is created.
This is now symmetric with the decrement that is done when an object is
released.

Signed-off-by: Tom Herbert <therbert@google.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoPhonet: mark the pipe controller as EXPERIMENTAL
Rémi Denis-Courmont [Fri, 8 Oct 2010 04:02:03 +0000 (04:02 +0000)]
Phonet: mark the pipe controller as EXPERIMENTAL

There are a bunch of issues that need to be fixed, including:
 - GFP_KERNEL allocations from atomic context
   (and GFP_ATOMIC in process context),
 - abuse of the setsockopt() call convention,
 - unprotected/unlocked static variables...

IMHO, we will need to alter the userspace ABI when we fix it. So mark
the configuration option as EXPERIMENTAL for the time being (or should
it be BROKEN instead?).

Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoPhonet: cleanup pipe enable socket option
Rémi Denis-Courmont [Fri, 8 Oct 2010 04:02:02 +0000 (04:02 +0000)]
Phonet: cleanup pipe enable socket option

The current code works like this:

  int garbage, status;
  socklen_t len = sizeof(status);

  /* enable pipe */
  setsockopt(fd, SOL_PNPIPE, PNPIPE_ENABLE, &garbage, sizeof(garbage));
  /* disable pipe */
  setsockopt(fd, SOL_PNPIPE, PNPIPE_DISABLE, &garbage, sizeof(garbage));
  /* get status */
  getsockopt(fd, SOL_PNPIPE, PNPIPE_INQ, &status, &len);

...which does not follow the usual socket option pattern. This patch
merges all three "options" into a single gettable&settable option,
before Linux 2.6.37 gets out:

  int status;
  socklen_t len = sizeof(status);

  /* enable pipe */
  status = 1;
  setsockopt(fd, SOL_PNPIPE, PNPIPE_ENABLE, &status, sizeof(status));
  /* disable pipe */
  status = 0;
  setsockopt(fd, SOL_PNPIPE, PNPIPE_ENABLE, &status, sizeof(status));
  /* get status */
  getsockopt(fd, SOL_PNPIPE, PNPIPE_ENABLE, &status, &len);

This also fixes the error code from EFAULT to ENOTCONN.

Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Cc: Kumar Sanghvi <kumar.sanghvi@stericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoPhonet: advise against enabling the pipe controller
Rémi Denis-Courmont [Fri, 8 Oct 2010 04:02:01 +0000 (04:02 +0000)]
Phonet: advise against enabling the pipe controller

As it currently is, the new code path is not compatible with existing
Nokia modems. This would break existing userspace for Nokia modem, such
as the existing oFono ISI driver.

Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoPhonet: add to MAINTAINERS and add myself
Rémi Denis-Courmont [Fri, 8 Oct 2010 04:02:00 +0000 (04:02 +0000)]
Phonet: add to MAINTAINERS and add myself

Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoqlcnic: update driver version 5.0.11
Amit Kumar Salecha [Thu, 7 Oct 2010 23:46:11 +0000 (23:46 +0000)]
qlcnic: update driver version 5.0.11

Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoqlcnic: change all P3 references to P3P
Sritej Velaga [Thu, 7 Oct 2010 23:46:10 +0000 (23:46 +0000)]
qlcnic: change all P3 references to P3P

This patch just rename all P3 #define to P3P.

Signed-off-by: Sritej Velaga <sritej.velaga@qlogic.com>
Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoqlcnic: fix promiscous mode for VF
Rajesh Borundia [Thu, 7 Oct 2010 23:46:09 +0000 (23:46 +0000)]
qlcnic: fix promiscous mode for VF

o Allow promiscous mode setting for VF's depending upon the configuration.

Signed-off-by: Rajesh Borundia <rajesh.borundia@qlogic.com>
Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoqlcnic: fix board description
Sritej Velaga [Thu, 7 Oct 2010 23:46:08 +0000 (23:46 +0000)]
qlcnic: fix board description

Remove "Flex-10" from board description.

Signed-off-by: Sritej Velaga <sritej.velaga@qlogic.com>
Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoqlcnic: remove private LRO flag
Amit Kumar Salecha [Thu, 7 Oct 2010 23:46:07 +0000 (23:46 +0000)]
qlcnic: remove private LRO flag

LRO was not getting enable after interface down/up.

Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoqlcnic: support quiescent mode
Amit Kumar Salecha [Thu, 7 Oct 2010 23:46:06 +0000 (23:46 +0000)]
qlcnic: support quiescent mode

Put device in quiescent mode during internal loopback test.
Before running test, set state to NEED_QUISCENT. After getting
ack from all function, change state to QUISCENT and perform test.

Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoqlcnic: driver private workqueue
Amit Kumar Salecha [Thu, 7 Oct 2010 23:46:05 +0000 (23:46 +0000)]
qlcnic: driver private workqueue

Currently fw recovery usage global workqueue.
As same workqueue used by kernel for ethtool and etc., supporting
quiescent mode is not possible, without driver private workqueue.

Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
14 years agoMerge branch 'for-davem' of git://git.kernel.org/pub/scm/linux/kernel/git/linville...
David S. Miller [Fri, 8 Oct 2010 20:51:11 +0000 (13:51 -0700)]
Merge branch 'for-davem' of git://git./linux/kernel/git/linville/wireless-next-2.6

14 years agoMerge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
John W. Linville [Fri, 8 Oct 2010 19:39:28 +0000 (15:39 -0400)]
Merge branch 'master' of git://git./linux/kernel/git/linville/wireless-next-2.6 into for-davem

Conflicts:
Documentation/feature-removal-schedule.txt
drivers/net/wireless/ipw2x00/ipw2200.c