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Larry Finger 4ff61c8f7b kaweth: Fix locking to be SMP-safe 
On an SMP system, the following message is printed. The patch below gets
fixes the problem.

=================================
[ INFO: inconsistent lock state ]
2.6.29-Linus-05093-gc31f403 #57
---------------------------------
inconsistent {hardirq-on-W} -> {in-hardirq-W} usage.
bash/4105 [HC1[1]:SC0[0]:HE0:SE1] takes:
 (&kaweth->device_lock){+...}, at: [<ffffffffa01aa286>]
                 kaweth_usb_receive+0x77/0x1af [kaw eth]
{hardirq-on-W} state was registered at:
  [<ffffffff80260503>] __lock_acquire+0x753/0x1685
  [<ffffffff8026148a>] lock_acquire+0x55/0x71
  [<ffffffff80461ba6>] _spin_lock+0x31/0x3d
  [<ffffffffa01aaa0c>] kaweth_start_xmit+0x2b/0x1e1 [kaweth]
  [<ffffffff803eccd3>] dev_hard_start_xmit+0x22e/0x2ad
  [<ffffffff803fe120>] __qdisc_run+0xf2/0x203
  [<ffffffff803ed0cd>] dev_queue_xmit+0x263/0x39b
  [<ffffffffa03a47cb>] packet_sendmsg_spkt+0x1c4/0x20a [af_packet]
  [<ffffffff803de0c2>] sock_sendmsg+0xe4/0xfd
  [<ffffffff803dec8f>] sys_sendto+0xe4/0x10c
  [<ffffffff8020bccb>] system_call_fastpath+0x16/0x1b
  [<ffffffffffffffff>] 0xffffffffffffffff
irq event stamp: 1280
hardirqs last  enabled at (1279): [<ffffffff80461a71>]
                  _spin_unlock_irqrestore+0x44/0x4c
hardirqs last disabled at (1280): [<ffffffff8020bad7>]
                  save_args+0x67/0x70
softirqs last  enabled at (660): [<ffffffff8024192c>]
                  __do_softirq+0x14d/0x15d
softirqs last disabled at (651): [<ffffffff8020ce9c>]
                  call_softirq+0x1c/0x28

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-04-02 01:09:43 -07:00
..
accessibility
acpi Merge branch 'core/percpu' into percpu-cpumask-x86-for-linus-2 2009-03-27 17:28:43 +01:00
amba amba: struct device - replace bus_id with dev_name(), dev_set_name() 2009-03-24 16:38:22 -07:00
ata Merge branch 'origin' into devel 2009-03-28 20:29:51 +00:00
atm
auxdisplay
base Merge branch 'core/percpu' into percpu-cpumask-x86-for-linus-2 2009-03-27 17:28:43 +01:00
block Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k 2009-03-26 16:15:31 -07:00
bluetooth
cdrom
char Merge branch 'origin' into devel 2009-03-28 20:29:51 +00:00
clocksource Merge branch 'core/percpu' into percpu-cpumask-x86-for-linus-2 2009-03-27 17:28:43 +01:00
connector
cpufreq Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq 2009-03-26 11:04:08 -07:00
cpuidle
crypto Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2009-03-26 11:04:34 -07:00
dca
dio dio: struct device - replace bus_id with dev_name(), dev_set_name() 2009-03-24 16:38:22 -07:00
dma Merge branch 'origin' into devel 2009-03-28 20:29:51 +00:00
edac edac: struct device - replace bus_id with dev_name(), dev_set_name() 2009-03-24 16:38:21 -07:00
eisa Merge branch 'core/percpu' into percpu-cpumask-x86-for-linus-2 2009-03-27 17:28:43 +01:00
firewire
firmware
gpio gpio: struct device - replace bus_id with dev_name(), dev_set_name() 2009-03-24 16:38:23 -07:00
gpu Merge branch 'linus' into percpu-cpumask-x86-for-linus-2 2009-03-28 04:26:01 +01:00
hid Merge branch 'bkl-removal' of git://git.lwn.net/linux-2.6 2009-03-26 16:14:02 -07:00
hwmon
i2c Merge branch 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6 2009-03-28 14:04:53 -07:00
ide Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2009-03-26 11:17:04 -07:00
idle
ieee1394 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2009-03-27 18:33:56 -07:00
infiniband Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2009-03-28 13:30:43 -07:00
input Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm 2009-03-28 14:03:14 -07:00
isdn Merge branch 'master' of /home/davem/src/GIT/linux-2.6/ 2009-03-26 15:23:24 -07:00
leds
lguest Merge branch 'core/percpu' into percpu-cpumask-x86-for-linus-2 2009-03-27 17:28:43 +01:00
macintosh
mca mca: struct device - replace bus_id with dev_name(), dev_set_name() 2009-03-24 16:38:23 -07:00
md
media Merge branch 'origin' into devel 2009-03-28 20:29:51 +00:00
memstick
message
mfd mfd: struct device - replace bus_id with dev_name(), dev_set_name() 2009-03-24 16:38:23 -07:00
misc Merge branch 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6 2009-03-28 14:04:53 -07:00
mmc Merge branch 'origin' into devel 2009-03-28 20:29:51 +00:00
mtd Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm 2009-03-28 14:03:14 -07:00
net kaweth: Fix locking to be SMP-safe 2009-04-02 01:09:43 -07:00
nubus
of
oprofile
parisc
parport
pci Merge branch 'core/percpu' into percpu-cpumask-x86-for-linus-2 2009-03-27 17:28:43 +01:00
pcmcia Merge branch 'origin' into devel 2009-03-28 20:29:51 +00:00
platform Merge branch 'bkl-removal' of git://git.lwn.net/linux-2.6 2009-03-26 16:14:02 -07:00
pnp
power
ps3
rapidio rapidio: struct device - replace bus_id with dev_name(), dev_set_name() 2009-03-24 16:38:21 -07:00
regulator
rtc Merge branch 'origin' into devel 2009-03-28 20:29:51 +00:00
s390 Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2009-03-28 13:30:43 -07:00
sbus
scsi Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm 2009-03-28 14:03:14 -07:00
serial Merge branch 'origin' into devel 2009-03-28 20:29:51 +00:00
sh Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2009-03-26 11:17:04 -07:00
sn
spi Merge branch 'origin' into devel 2009-03-28 20:29:51 +00:00
ssb b43: Add BCM4307 PCI-ID 2009-03-27 20:13:20 -04:00
staging
tc tc: struct device - replace bus_id with dev_name(), dev_set_name() 2009-03-24 16:38:22 -07:00
telephony
thermal
uio UIO: Take offset into account when determining number of pages that can be mapped 2009-03-24 16:38:25 -07:00
usb Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm 2009-03-28 14:03:14 -07:00
uwb
video Merge branch 'origin' into devel 2009-03-28 20:29:51 +00:00
virtio
w1 Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6 into devel 2009-03-25 18:31:35 +00:00
watchdog Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm 2009-03-28 14:03:14 -07:00
xen
zorro zorro: struct device - replace bus_id with dev_name(), dev_set_name() 2009-03-24 16:38:21 -07:00
Kconfig
Makefile ide/net: flip the order of SATA and network init 2009-03-28 13:06:16 -07:00