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Neil Horman 2cde6acd49 netpoll: Fix __netpoll_rcu_free so that it can hold the rtnl lock 
__netpoll_rcu_free is used to free netpoll structures when the rtnl_lock is
already held.  The mechanism is used to asynchronously call __netpoll_cleanup
outside of the holding of the rtnl_lock, so as to avoid deadlock.
Unfortunately, __netpoll_cleanup modifies pointers (dev->np), which means the
rtnl_lock must be held while calling it.  Further, it cannot be held, because
rcu callbacks may be issued in softirq contexts, which cannot sleep.

Fix this by converting the rcu callback to a work queue that is guaranteed to
get scheduled in process context, so that we can hold the rtnl properly while
calling __netpoll_cleanup

Tested successfully by myself.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
CC: "David S. Miller" <davem@davemloft.net>
CC: Cong Wang <amwang@redhat.com>
CC: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2013-02-11 19:19:33 -05:00
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accessibility
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acpi Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-01-31 17:08:43 +11:00
amba Drivers: amba: remove __dev* attributes. 2013-01-03 15:57:02 -08:00
ata [libata] replace sata_settings with devslp_timing 2013-01-14 13:29:15 -05:00
atm atm/iphase: rename fregt_t -> ffreg_t 2013-02-08 14:22:05 -05:00
auxdisplay Drivers: misc: remove __dev* attributes. 2013-01-03 15:57:16 -08:00
base Merge remote-tracking branch 'regmap/fix/debugfs' into tmp 2013-01-24 19:04:16 +08:00
bcma Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2013-02-08 18:02:14 -05:00
block Merge branch 'for-linus' of git://git.kernel.dk/linux-block 2013-02-07 08:38:33 +11:00
bluetooth Bluetooth device 04ca:3008 should use ath3k 2013-01-10 02:51:03 -02:00
bus Drivers: misc: remove __dev* attributes. 2013-01-03 15:57:16 -08:00
cdrom Drivers: misc: remove __dev* attributes. 2013-01-03 15:57:16 -08:00
char virtio_console: Don't access uninitialized data. 2013-02-07 11:37:37 +10:30
clk mvebu fixes for v3.8-rc5 2013-01-23 20:30:52 -08:00
clocksource Drivers: clocksource: remove __dev* attributes. 2013-01-03 15:57:15 -08:00
connector Drivers: misc: remove __dev* attributes. 2013-01-03 15:57:16 -08:00
cpufreq cpufreq: Add module aliases for acpi-cpufreq 2013-01-22 22:33:46 +01:00
cpuidle cpuidle: remove the power_specified field in the driver 2013-01-15 14:18:04 +01:00
crypto Drivers: crypto: remove __dev* attributes. 2013-01-03 15:57:02 -08:00
dca
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devfreq PM / devfreq: exynos4_bus: honor RCU lock usage 2013-01-22 13:28:40 +01:00
dio
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dma Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma 2013-01-24 10:17:49 -08:00
edac EDAC: Fix kcalloc argument order 2013-01-30 11:38:25 +01:00
eisa
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extcon
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firewire firewire net: Use LL_RESERVED_SPACE(), HH_DATA_OFF(). 2013-01-20 23:16:03 -05:00
firmware Merge branch 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-01-31 17:10:36 +11:00
gpio gpio: mvebu: Don't free chip label memory 2013-01-17 12:27:08 +01:00
gpu drm/ttm: fix fence locking in ttm_buffer_object_transfer, 2nd try 2013-02-08 10:44:31 +10:00
hid Merge branch 'for-3.8/upstream-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2013-02-01 08:44:59 +11:00
hsi Drivers: misc: remove __dev* attributes. 2013-01-03 15:57:16 -08:00
hv Drivers: hv: balloon: Fix a memory leak 2013-01-17 11:58:00 -08:00
hwmon hwmon: (vexpress) Fix build error seen if CONFIG_OF_DEVICE is not set 2013-01-09 21:47:22 -08:00
hwspinlock
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i2c i2c-designware: add missing MODULE_LICENSE 2013-01-22 16:43:34 +01:00
ide Drivers: ide: remove __dev* attributes. 2013-01-03 15:57:03 -08:00
idle intel_idle: Don't register CPU notifier if we are not running. 2013-01-18 13:43:43 +01:00
iio Staging fixes for 3.8-rc3 2013-01-14 09:08:38 -08:00
infiniband Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2013-02-08 18:02:14 -05:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2013-01-04 10:30:11 -08:00
iommu Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux 2013-01-30 12:02:26 +11:00
ipack TTY/Serial merge for 3.8-rc1 2012-12-11 14:08:47 -08:00
irqchip ARM: arm-soc: Device-tree updates, take 2 2012-12-14 14:42:53 -08:00
isdn wanrouter: completely decouple obsolete code from kernel. 2013-01-31 19:20:33 -05:00
leds leds: leds-gpio: set devm_gpio_request_one() flags param correctly 2013-01-02 17:58:41 -08:00
lguest lguest: fix typo 2012-12-18 15:19:06 +10:30
macintosh Drivers: macintosh: remove __dev* attributes. 2013-01-03 15:57:14 -08:00
md A fix for stacked dm thin devices and a fix for the new dm WRITE SAME 2013-02-01 12:04:22 +11:00
media Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media 2013-02-06 08:36:12 +11:00
memory Drivers: memory: remove __dev* attributes. 2013-01-03 15:57:14 -08:00
memstick
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message Drivers: message: remove __dev* attributes. 2013-01-03 15:57:14 -08:00
mfd This is the first pull request for MFD fixes for 3.8 2013-01-28 11:51:57 -08:00
misc Revert "drivers/misc/ti-st: remove gpio handling" 2013-01-22 17:22:47 -08:00
mmc This is the first pull request for MFD fixes for 3.8 2013-01-28 11:51:57 -08:00
mtd A small set of simple regression and build fixes for 3.8: 2013-02-05 07:54:11 +11:00
net netpoll: Fix __netpoll_rcu_free so that it can hold the rtnl lock 2013-02-11 19:19:33 -05:00
nfc Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem 2013-01-28 14:43:00 -05:00
nubus
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of net: phy: remove flags argument from phy_{attach, connect, connect_direct} 2013-01-14 15:11:50 -05:00
oprofile
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parisc Drivers: misc: remove __dev* attributes. 2013-01-03 15:57:16 -08:00
parport Drivers: parport: remove __dev* attributes. 2013-01-03 15:57:03 -08:00
pci PCI updates for v3.8: 2013-01-22 16:36:23 -08:00
pcmcia ARM: arm-soc: Header cleanups 2012-12-12 11:45:16 -08:00
pinctrl pinctrl: sirf: replace of_gpio_simple_xlate by sirf specific of_xlate 2013-02-05 15:27:39 +01:00
platform samsung-laptop: Disable on EFI hardware 2013-01-30 11:52:11 -08:00
pnp PNP: Handle IORESOURCE_BITS in resource allocation 2013-01-03 13:10:53 +01:00
power ARM: arm-soc fixes for 3.8-rc 2013-01-08 18:53:56 -08:00
pps Drivers: misc: remove __dev* attributes. 2013-01-03 15:57:16 -08:00
ps3 Drivers: misc: remove __dev* attributes. 2013-01-03 15:57:16 -08:00
ptp Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-12-12 18:07:07 -08:00
pwm pwm: Changes for v3.8-rc1 2012-12-19 08:19:07 -08:00
rapidio Driver core updates for 3.8-rc1 2012-12-11 13:13:55 -08:00
regulator Merge remote-tracking branch 'regulator/fix/tps65910' into tmp 2013-02-06 11:28:53 +00:00
remoteproc Drivers: misc: remove __dev* attributes. 2013-01-03 15:57:16 -08:00
rpmsg Drivers: misc: remove __dev* attributes. 2013-01-03 15:57:16 -08:00
rtc drivers/rtc/rtc-pl031.c: fix the missing operation on enable 2013-02-05 20:38:49 +11:00
s390 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2013-01-29 15:32:13 -05:00
sbus Drivers: sbus: remove __dev* attributes. 2013-01-03 15:57:03 -08:00
scsi efi: Make 'efi_enabled' a function to query EFI facilities 2013-01-30 11:51:59 -08:00
sfi
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sh sh: clkfwk: bugfix: sh_clk_div_enable() care sh_clk_div_set_rate() if div6 2013-01-11 20:57:58 +09:00
sn Drivers: misc: remove __dev* attributes. 2013-01-03 15:57:16 -08:00
spi spi/sh-hspi: fix return value check in hspi_probe(). 2012-12-19 15:11:41 +00:00
ssb Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2013-02-08 18:02:14 -05:00
staging Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2013-01-29 15:32:13 -05:00
target target: Fix divide by zero bug in fabric_max_sectors for unconfigured devices 2013-01-31 15:22:53 -08:00
tc
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thermal Drivers: thermal: remove __dev* attributes. 2013-01-03 15:57:02 -08:00
tty 8250/16?50: Add support for Broadcom TruManage redirected serial port 2013-01-17 14:02:55 -08:00
uio ARM: arm-soc: SoC updates for 3.8 2012-12-12 12:05:15 -08:00
usb Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2013-02-08 18:02:14 -05:00
uwb
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vfio vfio-pci: Fix buffer overfill 2013-01-15 10:45:26 -07:00
vhost Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2013-02-09 07:55:24 +11:00
video This is yet another critical imxfb fixes held off by absence of FB 2013-01-23 20:35:02 -08:00
virt Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2012-12-18 09:58:09 -08:00
virtio Drivers: virtio: remove __dev* attributes. 2013-01-03 15:57:01 -08:00
vlynq Drivers: vlynq: remove __dev* attributes. 2013-01-03 15:57:01 -08:00
vme
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w1 Drivers: w1: remove last __devexit_p() instance 2013-01-03 15:57:01 -08:00
watchdog watchdog: twl4030_wdt: add DT support 2013-01-02 12:07:05 +01:00
xen Two fixes: 2013-02-08 11:55:27 +11:00
zorro Drivers: zorro: remove CONFIG_HOTPLUG usage 2013-01-03 15:57:01 -08:00
Kconfig
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Makefile
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