8 years agoibmveth: Cleanup error handling inside ibmveth_open
Denis Kirjanov [Wed, 20 Oct 2010 04:21:13 +0000]
ibmveth: Cleanup error handling inside ibmveth_open

Remove duplicated code in one place.

Signed-off-by: Denis Kirjanov <dkirjanov@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agonet: avoid RCU for NOCACHE dst
Eric Dumazet [Fri, 15 Oct 2010 05:44:11 +0000]
net: avoid RCU for NOCACHE dst

There is no point using RCU for dst we allocate for a very short time
(used once).

Change dst_release() to take DST_NOCACHE into account, but also change
skb_dst_set_noref() to force a refcount increment for such dst.

This is a _huge_ gain, because we dont waste memory to store xx thousand
of dsts. Instead of queueing them to RCU, we can free them instantly.

CPU caches can stay hot, re-using same memory blocks to hold temporary
dsts.

Note : remove unneeded smp_mb__before_atomic_dec(); in dst_release(),
since atomic_dec_return() implies a full memory barrier.

Stress test, 160.000.000 udp frames sent, IP route cache disabled
(DDOS).

Before:

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

After:

real 0m29.946s
user 0m12.157s
sys 7m40.605s

For reference, if IP route cache was enabled :

real 0m32.030s
user 0m10.521s
sys 8m15.243s

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agonet: allocate tx queues in register_netdevice
Tom Herbert [Mon, 18 Oct 2010 18:04:39 +0000]
net: allocate tx queues in register_netdevice

This patch introduces netif_alloc_netdev_queues which is called from
register_device instead of alloc_netdev_mq.  This makes TX queue
allocation symmetric with RX allocation.  Also, queue locks allocation
is done in netdev_init_one_queue.  Change set_real_num_tx_queues to
fail if requested number < 1 or greater than number of allocated
queues.

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>

8 years agonet: cleanups in RX queue allocation
Tom Herbert [Mon, 18 Oct 2010 18:00:16 +0000]
net: cleanups in RX queue allocation

Clean up in RX queue allocation.  In netif_set_real_num_rx_queues
return error on attempt to set zero queues, or requested number is
greater than number of allocated queues.  In netif_alloc_rx_queues,
do BUG_ON if queue_count is zero.

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>

8 years agonet: fail alloc_netdev_mq if queue count < 1
Tom Herbert [Mon, 18 Oct 2010 17:55:58 +0000]
net: fail alloc_netdev_mq if queue count < 1

In alloc_netdev_mq fail if requested queue_count < 1.

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>

8 years agoMerge branch 'for-davem' of git://git.kernel.org/pub/scm/linux/kernel/git/linville...
David S. Miller [Wed, 20 Oct 2010 08:59:48 +0000]
Merge branch 'for-davem' of git://git./linux/kernel/git/linville/wireless-next-2.6

8 years agophonet: remove the unused variable pn
Changli Gao [Tue, 19 Oct 2010 21:51:03 +0000]
phonet: remove the unused variable pn

Signed-off-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agonetpoll: Revert napi_poll fix for bonding driver
Neil Horman [Tue, 19 Oct 2010 07:04:26 +0000]
netpoll: Revert napi_poll fix for bonding driver

In an erlier patch I modified napi_poll so that devices with IFF_MASTER polled
the per_cpu list instead of the device list for napi.  I did this because the
bonding driver has no napi instances to poll, it instead expects to check the
slave devices napi instances, which napi_poll was unaware of.  Looking at this
more closely however, I now see this isn't strictly needed.  As the bond driver
poll_controller calls the slaves poll_controller via netpoll_poll_dev, which
recursively calls poll_napi on each slave, allowing those napi instances to get
serviced.  The earlier patch isn't at all harmfull, its just not needed, so lets
revert it to make the code cleaner.  Sorry for the noise,

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Reviewed-by: WANG Cong <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agonetpoll: Remove netpoll blocking from uninit path
Neil Horman [Tue, 19 Oct 2010 07:04:25 +0000]
netpoll: Remove netpoll blocking from uninit path

Some recent testing in netpoll with bonding showed this backtrace

 ------------[ cut here ]------------
 kernel BUG at drivers/net/bonding/bonding.h:134!
 invalid opcode: 0000 [#1] SMP
 last sysfs file: /sys/devices/pci0000:00/0000:00:1d.2/usb7/devnum
 CPU 0
 Pid: 1876, comm: rmmod Not tainted 2.6.36-rc3+ #10 D26928/
 RIP: 0010:[<ffffffffa0514ba4>]  [<ffffffffa0514ba4>] bond_uninit+0x6f4/0x7a0
 RSP: 0018:ffff88003b1b5d58  EFLAGS: 00010296
 RAX: ffff88003b9b6200 RBX: ffff8800373e8e00 RCX: 00000000000f4240
 RDX: 00000000ffffffff RSI: 0000000000000286 RDI: 0000000000000286
 RBP: ffff88003b1b5dc8 R08: 0000000000000000 R09: 00000001af7de920
 R10: 0000000000000000 R11: ffff880002495e98 R12: ffff880037922700
 R13: ffff880038c31000 R14: ffff880037922730 R15: 0000000000000286
 FS:  00007f90e6d72700(0000) GS:ffff880002400000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
 CR2: 000000346f0d9ad0 CR3: 000000003b263000 CR4: 00000000000006f0
 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
 Process rmmod (pid: 1876, threadinfo ffff88003b1b4000, task ffff88003b36aa80)
 Stack:
 00000000ffffffff ffff88003b1b5d7a ffff8800379221e8 ffff880037922000
 <0> ffff88003b1b5dc8 ffffffff813eb5fb ffff88003b1b5da8 0000000031b177a3
 <0> ffff88003b1b5da8 ffff880037922000 ffff88003b1b5e48 ffff88003b1b5e48
 Call Trace:
 [<ffffffff813eb5fb>] ? rtmsg_ifinfo+0xcb/0xf0
 [<ffffffff813daad8>] rollback_registered_many+0x168/0x280
 [<ffffffff813dac09>] unregister_netdevice_many+0x19/0x80
 [<ffffffff813e97b3>] __rtnl_kill_links+0x63/0x90
 [<ffffffff813e980b>] __rtnl_link_unregister+0x2b/0x60
 [<ffffffff813e9bde>] rtnl_link_unregister+0x1e/0x30
 [<ffffffffa052124b>] bonding_exit+0x37/0x51 [bonding]
 [<ffffffff81098b2e>] sys_delete_module+0x19e/0x270
 [<ffffffff810bb2b2>] ? audit_syscall_entry+0x252/0x280
 [<ffffffff8100b0b2>] system_call_fastpath+0x16/0x1b
 RIP  [<ffffffffa0514ba4>] bond_uninit+0x6f4/0x7a0 [bonding]
 RSP <ffff88003b1b5d58>
 ---[ end trace 1395ad691cea24d1 ]---

It occurs because of my recent netpoll blocking patches, which I added to avoid
recursive deadlock in the bonding driver.  It relies on some per cpu bits, but
the shutdown path forces some rescheduling as we cancel workqueues for the
driver and wait for some device refcounts.  If after the forced reschedule, we
wind up on a different cpu we trigger the bughalt in unblock_netpoll_tx.

The fix is to remove the netpoll block/unblock calls from bond_release_all.
This is safe to do because bond_uninit, which is called via ndo_uninit in
rollback_registered_many, doesn't occur until we send a NETDEV_UNREGISTER event,
which triggers netconsole to remove us as a netpoll client, so we are guaranteed
not to recurse into our own tx path here.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Reviewed-by: WANG Cong <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agobnx2x: update version to 1.60.00-3
Dmitry Kravkov [Tue, 19 Oct 2010 05:13:00 +0000]
bnx2x: update version to 1.60.00-3

Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agobnx2x: prevent false parity error in MSI-X memory of HC block
Vladislav Zolotarov [Tue, 19 Oct 2010 05:13:09 +0000]
bnx2x: prevent false parity error in MSI-X memory of HC block

Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Vladislav Zolotarov <vladz@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agobnx2x: fix possible deadlock in HC hw block
Dmitry Kravkov [Tue, 19 Oct 2010 05:13:05 +0000]
bnx2x: fix possible deadlock in HC hw block

The possible deadlock (on 57710 devices only) will prevent from the
device to generate interrupts.

Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agoinet: RCU changes in inetdev_by_index()
Eric Dumazet [Tue, 19 Oct 2010 00:39:26 +0000]
inet: RCU changes in inetdev_by_index()

Convert inetdev_by_index() to not increment in_dev refcount.

Callers hold RCU or RTNL, and should not decrement in_dev refcount.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agonet: avoid a dev refcount in ip_mc_find_dev()
Eric Dumazet [Tue, 19 Oct 2010 00:39:18 +0000]
net: avoid a dev refcount in ip_mc_find_dev()

We hold RTNL in ip_mc_find_dev(), no need to touch device refcount.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years ago3c52x: remove IRQF_SAMPLE_RANDOM from legacy MCA drivers.
Paul Gortmaker [Thu, 14 Oct 2010 14:21:51 +0000]
3c52x: remove IRQF_SAMPLE_RANDOM from legacy MCA drivers.

If you are genuinely using one of these legacy MCA drivers
then you are tragically on hardware where you really don't
have the extra CPU cycles to be wasting on this.

In addition, it makes two less cases for people to inadvertently
blindly copy flags from without explicitly thinking whether it
makes sense -- see the addition to feature-removal.txt as per
commit 9d9b8fb0e5ebf4b0398e579f6061d4451fea3242.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agobonding: Re-enable netpoll over bonding
Neil Horman [Wed, 13 Oct 2010 16:01:53 +0000]
bonding: Re-enable netpoll over bonding

With the inclusion of previous fixup patches, netpoll over bonding apears to
work reliably with failover conditions.  This reverts Gospos previous commit
c22d7ac844f1cb9c6a5fd20f89ebadc2feef891b, and allows access again to the netpoll
functionality in the bonding driver.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agobonding: Fix netconsole to not deadlock on rmmod
Neil Horman [Wed, 13 Oct 2010 16:01:52 +0000]
bonding: Fix netconsole to not deadlock on rmmod

Netconsole calls netpoll_cleanup on receipt of a NETDEVICE_UNREGISTER event.
The notifier subsystem calls these event handlers with rtnl_lock held, which
netpoll_cleanup also takes, resulting in deadlock.  Fix this by calling the
__netpoll_cleanup interior function instead, and fixing up the additional
pointers.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agobonding: Fix napi poll for bonding driver
Neil Horman [Wed, 13 Oct 2010 16:01:51 +0000]
bonding: Fix napi poll for bonding driver

Usually the netpoll path, when preforming a napi poll can get away with just
polling all the napi instances of the configured device.  Thats not the case for
the bonding driver however, as the napi instances which may wind up getting
flagged as needing polling after the poll_controller call don't belong to the
bonded device, but rather to the slave devices.  Fix this by checking the device
in question for the IFF_MASTER flag, if set, we know we need to check the full
poll list for this cpu, rather than just the devices napi instance list.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agobonding: Fix deadlock in bonding driver resulting from internal locking when using...
Neil Horman [Wed, 13 Oct 2010 16:01:50 +0000]
bonding: Fix deadlock in bonding driver resulting from internal locking when using netpoll

The monitoring paths in the bonding driver take write locks that are shared by
the tx path.  If netconsole is in use, these paths can call printk which puts us
in the netpoll tx path, which, if netconsole is attached to the bonding driver,
result in deadlock (the xmit_lock guards are useless in netpoll_send_skb, as the
monitor paths in the bonding driver don't claim the xmit_lock, nor should they).
The solution is to use a per cpu flag internal to the driver to indicate when a
cpu is holding the lock in a path that might recusrse into the tx path for the
driver via netconsole.  By checking this flag on transmit, we can defer the
sending of the netconsole frames until a later time using the retransmit feature
of netpoll_send_skb that is triggered on the return code NETDEV_TX_BUSY.  I've
tested this and am able to transmit via netconsole while causing failover
conditions on the bond slave links.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agobonding: Fix bonding drivers improper modification of netpoll structure
Neil Horman [Wed, 13 Oct 2010 16:01:49 +0000]
bonding: Fix bonding drivers improper modification of netpoll structure

The bonding driver currently modifies the netpoll structure in its xmit path
while sending frames from netpoll.  This is racy, as other cpus can access the
netpoll structure in parallel. Since the bonding driver points np->dev to a
slave device, other cpus can inadvertently attempt to send data directly to
slave devices, leading to improper locking with the bonding master, lost frames,
and deadlocks.  This patch fixes that up.

This patch also removes the real_dev pointer from the netpoll structure as that
data is really only used by bonding in the poll_controller, and we can emulate
its behavior by check each slave for IS_UP.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agoe1000e: Fix for offline diag test failure at first call
Carolyn Wyborny [Fri, 15 Oct 2010 17:35:31 +0000]
e1000e: Fix for offline diag test failure at first call

Move link test call to later in the offline sequence, move the
restore settings block to afterwards and add another reset to ensure
the hardware is in a known state afterwards.

Signed-off-by: Carolyn Wyborny <carolyn.wyborny@intel.com>
Acked-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agoigbvf: Remove unneeded pm_qos* calls
Greg Rose [Fri, 15 Oct 2010 17:26:47 +0000]
igbvf: Remove unneeded pm_qos* calls

Power Management Quality of Service is not supported or used by the VF
driver.

Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agoigb: fix stats handling
Eric Dumazet [Fri, 15 Oct 2010 17:27:10 +0000]
igb: fix stats handling

There are currently some problems with igb.

- On 32bit arches, maintaining 64bit counters without proper
synchronization between writers and readers.

- Stats updated every two seconds, as reported by Jesper.
   (Jesper provided a patch for this)

- Potential problem between worker thread and ethtool -S

This patch uses u64_stats_sync, and convert everything to be 64bit safe,
SMP safe, even on 32bit arches. It integrates Jesper idea of providing
accurate stats at the time user reads them.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.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>

8 years agonetxen: mask correctable error
amit salecha [Mon, 18 Oct 2010 02:03:42 +0000]
netxen: mask correctable error

HW workaround:
Disable logging of correctable error for some NX3031 based adapter.

Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agonetxen: fix race in tx stop queue
Rajesh Borundia [Mon, 18 Oct 2010 02:03:41 +0000]
netxen: fix race in tx stop queue

There is race between netif_stop_queue and netif_stopped_queue
check.So check once again if buffers are available to avoid race.
With above logic we can also get rid of tx lock in process_cmd_ring.

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>

8 years agoqlcnic: update ethtool stats
amit salecha [Mon, 18 Oct 2010 01:47:48 +0000]
qlcnic: update ethtool stats

Added statistics for Nic Partition supported adapter.
These statistics are maintined in device.

Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agoIPv4: route.c: Change checks against 0xffffffff to ipv4_is_lbcast()
Andy Walls [Sun, 17 Oct 2010 15:11:22 +0000]
IPv4: route.c: Change checks against 0xffffffff to ipv4_is_lbcast()

Change a few checks against the hardcoded broadcast address,
0xffffffff, to ipv4_is_lbcast().  Remove some existing checks
using ipv4_is_lbcast() that are now obviously superfluous.

Signed-off-by: Andy Walls <awalls@md.metrocast.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agoMerge branch 'can/mcp251x-for-net-next' of git://git.pengutronix.de/git/mkl/linux-2.6
David S. Miller [Mon, 18 Oct 2010 14:11:44 +0000]
Merge branch 'can/mcp251x-for-net-next' of git://git.pengutronix.de/git/mkl/linux-2.6

8 years agobnx2x: update version to 1.60.00-2
Dmitry Kravkov [Sun, 17 Oct 2010 23:08:55 +0000]
bnx2x: update version to 1.60.00-2

Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agobnx2x: remove unnecessary FUNC_FLG_RSS flag and related
Dmitry Kravkov [Sun, 17 Oct 2010 23:08:53 +0000]
bnx2x: remove unnecessary FUNC_FLG_RSS flag and related

As suggested by: Joe Perches <joe@perches.com>

Although RSS is meaningless when there is a single HW queue we
still need it enabled in order to have HW Rx hash generated.

Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Vladislav Zolotarov <vladz@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agobnx2x: Use correct FW constant for header padding
Dmitry Kravkov [Sun, 17 Oct 2010 23:09:30 +0000]
bnx2x: Use correct FW constant for header padding

the value of the constant is the same, but it's clearer to use original
constant provided by HSI

Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agobnx2x: do not deal with power if no capability
Dmitry Kravkov [Sun, 17 Oct 2010 23:10:02 +0000]
bnx2x: do not deal with power if no capability

Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Vladislav Zolotarov <vladz@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agobnx2x: remove redundant commands during error handling
Dmitry Kravkov [Sun, 17 Oct 2010 23:05:09 +0000]
bnx2x: remove redundant commands during error handling

Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agobnx2x: Optimized the branching in the bnx2x_rx_int()
Vladislav Zolotarov [Sun, 17 Oct 2010 23:02:20 +0000]
bnx2x: Optimized the branching in the bnx2x_rx_int()

Optimized the branching in the bnx2x_rx_int() based on the fact
that FP CQE will always have at least one of START or STOP flags set,
so if not both bits are set and START bit is not set,
then it's a STOP bit that is set.

Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Vladislav Zolotarov <vladz@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agocan: mcp251x: optimize 2515, rx int gets cleared automatically
Marc Kleine-Budde [Mon, 4 Oct 2010 10:09:31 +0000]
can: mcp251x: optimize 2515, rx int gets cleared automatically

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Acked-by: Wolfgang Grandegger <wg@grandegger.com>

8 years agocan: mcp251x: define helper functions mcp251x_is_2510, mcp251x_is_2515
Marc Kleine-Budde [Thu, 23 Sep 2010 19:34:28 +0000]
can: mcp251x: define helper functions mcp251x_is_2510, mcp251x_is_2515

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Acked-by: Wolfgang Grandegger <wg@grandegger.com>

8 years agocan: mcp251x: Don't use pdata->model for chip selection anymore
Marc Kleine-Budde [Mon, 18 Oct 2010 13:00:18 +0000]
can: mcp251x: Don't use pdata->model for chip selection anymore

Since commit e446630c960946b5c1762e4eadb618becef599e7, i.e. v2.6.35-rc1,
the mcp251x chip model can be selected via the modalias member in the
struct spi_board_info. The driver stores the actual model in the
struct mcp251x_platform_data.

From the driver point of view the platform_data should be read only.
Since all in-tree users of the mcp251x have already been converted to
the modalias method, this patch moves the "model" member from the
struct mcp251x_platform_data to the driver's private data structure.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Cc: Christian Pellegrin <chripell@fsfe.org>
Cc: Marc Zyngier <maz@misterjones.org>

8 years agocan: mcp251x: write intf only when needed
Marc Kleine-Budde [Tue, 28 Sep 2010 08:18:34 +0000]
can: mcp251x: write intf only when needed

This patch introduces a variable "clear_intf" that hold the bits that
should be cleared. Only read-modify-write register if "clear_intf"
is set.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Acked-by: Wolfgang Grandegger <wg@grandegger.com>

8 years agocan: mcp251x: read-modify-write eflag only when needed
Sascha Hauer [Tue, 28 Sep 2010 08:00:47 +0000]
can: mcp251x: read-modify-write eflag only when needed

Use read-modify-write instead of a simple write to change the register
contents, to close existing the race window between the original manual
read and write.

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>

8 years agocan: mcp251x: allow to read two registers in one spi transfer
Sascha Hauer [Tue, 28 Sep 2010 07:53:35 +0000]
can: mcp251x: allow to read two registers in one spi transfer

This patch bases on work done earlier by David Jander.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: David Jander <david@protonic.nl>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Acked-by: Wolfgang Grandegger <wg@grandegger.com>

8 years agocan: mcp251x: increase rx_errors on overflow, not only rx_over_errors
Sascha Hauer [Thu, 30 Sep 2010 07:46:00 +0000]
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>

8 years agocan: mcp251x: fix NOHZ local_softirq_pending 08 warning
Marc Kleine-Budde [Mon, 4 Oct 2010 08:50:51 +0000]
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>

8 years agons83820: spin_lock_irq() => spin_lock()
Dan Carpenter [Wed, 13 Oct 2010 09:18:53 +0000]
ns83820: spin_lock_irq() => spin_lock()

This is essentially cosmetic.  At this point the IRQs are already
disabled because we called spin_lock_irq(&dev->rx_info.lock).

The real bug here was fixed back in 2006 in 3a10ccebe: "[PATCH] lock
validator: fix ns83820.c irq-flags bug".  Prior to that patch, it was
a "spin_lock_irq is not nestable" type bug.  The 2006 patch changes the
unlock to not re-enable IRQs, which eliminates the potential deadlock.

But this bit was missed.  We should change the lock function as well so
it balances nicely.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agotipc: Simplify bearer shutdown logic
Allan Stephens [Thu, 14 Oct 2010 13:58:26 +0000]
tipc: Simplify bearer shutdown logic

Optimize processing in TIPC's bearer shutdown code, including:

1. Remove an unnecessary check to see if TIPC bearer's can exist.
2. Don't release spinlocks before calling a media-specific disabling
routine, since the routine can't sleep.
3. Make bearer_disable() operate directly on a struct bearer, instead
of needlessly taking a name and then mapping that to the struct.

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Reviewed-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agotipc: Kill tipc_get_mode() completely.
David S. Miller [Mon, 18 Oct 2010 08:06:20 +0000]
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>

8 years agotg3: Update version to 3.115
Matt Carlson [Thu, 14 Oct 2010 10:37:45 +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>

8 years agotg3: Report invalid link from tg3_get_settings()
Matt Carlson [Thu, 14 Oct 2010 10:37:44 +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>

8 years agotg3: Don't allocate jumbo ring for 5780 class devs
Matt Carlson [Thu, 14 Oct 2010 10:37:43 +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>

8 years agotg3: Cleanup tg3_alloc_rx_skb()
Matt Carlson [Thu, 14 Oct 2010 10:37:42 +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>

8 years agotg3: Add EEE support
Matt Carlson [Thu, 14 Oct 2010 10:37:41 +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>

8 years agotg3: Add clause 45 register accessor methods
Matt Carlson [Thu, 14 Oct 2010 10:37:40 +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>

8 years agotg3: Disable unused transmit rings
Matt Carlson [Thu, 14 Oct 2010 10:37:39 +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>

8 years agotg3: Add support for selfboot format 1 v6
Matt Carlson [Thu, 14 Oct 2010 10:37:38 +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>

8 years agofib_hash: RCU conversion phase 2
Eric Dumazet [Thu, 14 Oct 2010 20:56:39 +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>

8 years agofib_hash: RCU conversion phase 1
Eric Dumazet [Thu, 14 Oct 2010 20:53:34 +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>

8 years agofib_hash: embed initial hash table in fn_zone
Eric Dumazet [Thu, 14 Oct 2010 20:53:04 +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>

8 years agodrivers/net/pch_gbe: Use DEFINE_PCI_DEVICE_TABLE
Joe Perches [Thu, 14 Oct 2010 09:55:50 +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>

8 years agonetns: reorder fields in struct net
Eric Dumazet [Thu, 14 Oct 2010 05:56:18 +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>

8 years agotcp: use correct counters in CA_CWR state too
Ilpo Järvinen [Thu, 14 Oct 2010 01:52:09 +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>

8 years agotcp: sack lost marking fixes
Ilpo Järvinen [Thu, 14 Oct 2010 01:42:30 +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>

8 years agostmmac: remove ifdef NETIF_F_TSO from stmmac_ethtool.c
Giuseppe Cavallaro [Sun, 17 Oct 2010 20:43:56 +0000]
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>

8 years agoniu: introduce temp variables to avoid sparse warnings when swapping in-situ
Harvey Harrison [Wed, 13 Oct 2010 18:59:13 +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>

8 years agonet: move MII outside of NET_ETHERNET, fix kconfig warning
Randy Dunlap [Wed, 13 Oct 2010 15:18:59 +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>

8 years agoinfiniband: fix mlx4 kconfig dependency warning
Randy Dunlap [Wed, 13 Oct 2010 15:12:53 +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>

8 years agostmmac: make function tables const
stephen hemminger [Wed, 13 Oct 2010 14:51:25 +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>

8 years agostmmac: make ethtool functions local
stephen hemminger [Wed, 13 Oct 2010 14:50:31 +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>

8 years agotipc: cleanup function namespace
stephen hemminger [Wed, 13 Oct 2010 13:20:35 +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>

8 years agovia-velocity: forced 1000 Mbps mode support.
françois romieu [Wed, 13 Oct 2010 09:26:05 +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>

8 years agofib: avoid false sharing on fib_table_hash
Eric Dumazet [Wed, 13 Oct 2010 08:22:03 +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>

8 years agofib_trie: use fls() instead of open coded loop
Eric Dumazet [Wed, 13 Oct 2010 06:56:11 +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>

8 years agofib: remove a useless synchronize_rcu() call
Eric Dumazet [Wed, 13 Oct 2010 04:43:04 +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>

8 years agofib6: use FIB_LOOKUP_NOREF in fib6_rule_lookup()
Eric Dumazet [Wed, 13 Oct 2010 02:45:40 +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>

8 years agosundance: Add initial ethtool stats support
Denis Kirjanov [Wed, 13 Oct 2010 00:56:09 +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>

8 years agopch_gbe: fix if condition in set_settings()
Dan Carpenter [Tue, 12 Oct 2010 23:36:19 +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>

8 years agodnet: mark methods static and annotate for correct endianness
Harvey Harrison [Tue, 12 Oct 2010 22:20:34 +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>

8 years agocxgb4vf: make single bit signed bitfields unsigned
Harvey Harrison [Tue, 12 Oct 2010 21:52:26 +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>

8 years agonet: allocate skbs on local node
Eric Dumazet [Mon, 11 Oct 2010 19:05:25 +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>

8 years agor8169: use 50% less ram for RX ring
Eric Dumazet [Mon, 11 Oct 2010 11:17:47 +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>

8 years agoMerge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
John W. Linville [Fri, 15 Oct 2010 20:11:56 +0000]
Merge branch 'master' of git://git./linux/kernel/git/linville/wireless-next-2.6 into for-davem

8 years agoMerge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/padovan/blueto...
John W. Linville [Fri, 15 Oct 2010 20:00:02 +0000]
Merge branch 'master' of git://git./linux/kernel/git/padovan/bluetooth-next-2.6 into for-davem

8 years agodrivers/net/wireless/p54/eeprom.c: Return -ENOMEM on memory allocation failure
Julia Lawall [Fri, 15 Oct 2010 13:00:06 +0000]
drivers/net/wireless/p54/eeprom.c: Return -ENOMEM on memory allocation failure

In this code, 0 is returned on memory allocation failure, even though other
failures return -ENOMEM or other similar values.

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

// <smpl>
@@
expression ret;
expression x,e1,e2,e3;
@@

ret = 0
... when != ret = e1
*x = \(kmalloc\|kcalloc\|kzalloc\)(...)
... when != ret = e2
if (x == NULL) { ... when != ret = e3
  return ret;
}
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Cc: <stable@kernel.org>
Acked-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

8 years agoath9k: Null out references to stale pointers.
Ben Greear [Thu, 14 Oct 2010 19:45:30 +0000]
ath9k: Null out references to stale pointers.

This doesn't fix any problem that I'm aware of, but should
make it harder to add use-after-free type bugs in the
future.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

8 years agoath9k: Remove bf_dmacontext.
Ben Greear [Thu, 14 Oct 2010 19:45:29 +0000]
ath9k: Remove bf_dmacontext.

The bf_dmacontext seems to be totally useless and duplicated
by bf_buf_addr.  Remove it entirely, use bf_buf_addr in its
place.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

8 years agob43: N-PHY: put 2056-radio's specific code in separated file
Rafał Miłecki [Thu, 14 Oct 2010 19:16:33 +0000]
b43: N-PHY: put 2056-radio's specific code in separated file

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

8 years agoath9k_hw: remove AR9003 2.0 support
Luis R. Rodriguez [Thu, 14 Oct 2010 18:44:27 +0000]
ath9k_hw: remove AR9003 2.0 support

These chipsets will not hit the market, all customers will be
on >= AR9003 2.2. This shaves down the ath9k_hw size by
24161 bytes (24 KB) on my system.

Before:

$ size drivers/net/wireless/ath/ath9k/ath9k_hw.ko
   text    data     bss     dec     hex filename
 292328     616    1824  294768   47f70 drivers/net/wireless/ath/ath9k/ath9k_hw.ko

$ du -b drivers/net/wireless/ath/ath9k/ath9k_hw.ko
5987825 drivers/net/wireless/ath/ath9k/ath9k_hw.ko

After:

$ size drivers/net/wireless/ath/ath9k/ath9k_hw.ko
   text    data     bss     dec     hex filename
 277192     616    1824  279632   44450 drivers/net/wireless/ath/ath9k/ath9k_hw.ko

$ du -b drivers/net/wireless/ath/ath9k/ath9k_hw.ko
5963664 drivers/net/wireless/ath/ath9k/ath9k_hw.ko

Cc: Yixiang Li <yixiang.li@atheros.com>
Cc: Don Breslin <don.breslin@atheros.com>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

8 years agob43: N-PHY: put radio-specific code in separated file
Rafał Miłecki [Thu, 14 Oct 2010 17:33:36 +0000]
b43: N-PHY: put radio-specific code in separated file

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

8 years agob43: N-PHY: fix typo: read table when caching IQ LO calibration (do not write)
Rafał Miłecki [Thu, 14 Oct 2010 17:33:35 +0000]
b43: N-PHY: fix typo: read table when caching IQ LO calibration (do not write)

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

8 years agob43: N-PHY: replace N-specific radio_chanspec with common code
Rafał Miłecki [Thu, 14 Oct 2010 17:33:34 +0000]
b43: N-PHY: replace N-specific radio_chanspec with common code

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

8 years agoradiotap: fix vendor namespace parsing
Johannes Berg [Thu, 14 Oct 2010 11:41:35 +0000]
radiotap: fix vendor namespace parsing

There's a bug with radiotap vendor namespace
parsing if you don't register for the given
namespace extensions. Fix this by passing
only the unknown vendor namespaces and the
registered data to frontends, but not both.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

8 years agoath9k_htc: set probe request rx filter
Rajkumar Manoharan [Thu, 14 Oct 2010 05:20:26 +0000]
ath9k_htc: set probe request rx filter

This patch enables to receive probe request frames on p2p
client mode.

Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

8 years agolibertas: Communicate USB transfer errors
Paul Fox [Wed, 13 Oct 2010 19:14:56 +0000]
libertas: Communicate USB transfer errors

The return code was being overwritten with -1.
Useful for debugging.

Signed-off-by: Paul Fox <pgf@laptop.org>
Signed-off-by: Daniel Drake <dsd@laptop.org>
Acked-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

8 years agoath9k_hw: remove enum wireless_mode and its users
Felix Fietkau [Thu, 14 Oct 2010 14:02:39 +0000]
ath9k_hw: remove enum wireless_mode and its users

The wireless mode bitfield was only used to detect 2.4 and 5 GHz support,
which can be simplified by using ATH9K_HW_CAP_* capabilities.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

8 years agoath9k: remove sc->cur_rate_table and sc->cur_rate_mode
Felix Fietkau [Wed, 13 Oct 2010 14:43:27 +0000]
ath9k: remove sc->cur_rate_table and sc->cur_rate_mode

Set the rate table in the rc module properly based on band and
HT capabilities instead, which was already partially done, but
not for every mode.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

8 years agoath9k: make rate control debugfs stats per station
Felix Fietkau [Wed, 13 Oct 2010 14:43:26 +0000]
ath9k: make rate control debugfs stats per station

Move them to the same debugfs file that the other rc modules use.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

8 years agoath9k: add missing locking around ath9k_hw_proc_mib_event
Felix Fietkau [Tue, 12 Oct 2010 14:08:03 +0000]
ath9k: add missing locking around ath9k_hw_proc_mib_event

ath9k_hw_proc_mib_event updates the cycle counters, so it common->cc_lock
must be acquired.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

8 years agoath9k_hw: fix PHY counter overflow handling in ANI v1
Felix Fietkau [Tue, 12 Oct 2010 14:08:02 +0000]
ath9k_hw: fix PHY counter overflow handling in ANI v1

PHY counter overflows need to be checked for the old ANI version,
because of its use of interrupt based counter overflow reports when
the counters exceed the configured thresholds.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

8 years agoath9k_hw: fix division by zero in the ANI monitor code
Felix Fietkau [Tue, 12 Oct 2010 14:08:01 +0000]
ath9k_hw: fix division by zero in the ANI monitor code

The commit "ath9k_hw: remove code duplication in phy error counter handling"
split off some duplicate code into a separate function, but did not have a
return code for aborting ANI processing based on counter values.
This introduced a divide by zero issue.
This patch adds the missing return code check in ath9k_hw_ani_monitor

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

8 years agoath9k: do not track cycle counter updates in powersave mode
Felix Fietkau [Tue, 12 Oct 2010 12:02:53 +0000]
ath9k: do not track cycle counter updates in powersave mode

While the chip is in powersave mode, the cycle counter updates do not
contain useful values. While the chip is in full sleep, the rx_clear
signal stays high, indicating a busy medium.
To ensure sane values, update cycle counters before going into
powersave, and clear them right after switching back to awake.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

8 years agoixgbe: DCB: remove DCB check config
John Fastabend [Fri, 15 Oct 2010 16:27:38 +0000]
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>

8 years agoigb: add check for fiber/serdes devices to igb_set_spd_dplx;
Carolyn Wyborny [Tue, 12 Oct 2010 22:27:02 +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>