Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity
kernel-fxtec-pro1x/drivers
History
Steve Wise b3e123cf65 RDMA/cxgb3: Fix deadlock in iw_cxgb3 (hang when configuring interface) 
When the iw_cxgb3 module's cxgb3_client "add" func gets called by the
cxgb3 module, the iwarp driver ends up calling the ethtool ops
get_drvinfo function in cxgb3 to get the fw version and other info.
Currently the iwarp driver grabs the rtnl lock around this down call
to serialize.  As of 2.6.27 or so, things changed such that the rtnl
lock is held around the call to the netdev driver open function.  Also
the cxgb3_client "add" function doesn't get called if the device is
down.

So, if you load cxgb3, then load iw_cxgb3, then ifconfig up the
device, the iw_cxgb3 add func gets called with the rtnl_lock held.  If
you load cxgb3, ifconfig up the device, then load iw_cxgb3, the add
func gets called without the rtnl_lock held.  The former causes the
deadlock, the latter does not.

In addition, there are iw_cxgb3 sysfs handlers that also can call down
into cxgb3 to gather the fw and hw versions.  These can be called
concurrently on different processors and at any time.  Thus we need to
push this serialization down in the cxgb3 driver get_drvinfo func.

The fix is to remove rtnl lock usage, and use a per-device lock in cxgb3.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Acked-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-11-12 10:16:47 -08:00
..
accessibility
acpi Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 2008-10-23 10:20:36 -07:00
amba
ata Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 2008-10-23 10:20:36 -07:00
atm
auxdisplay
base memory_probe: fix wrong sysfs file attribute 2008-10-20 08:52:32 -07:00
block [PATCH] sanitize blkdev_get() and friends 2008-10-21 07:49:06 -04:00
bluetooth
cdrom [PATCH] switch viocd 2008-10-21 07:48:21 -04:00
char Merge git://git.kernel.org/pub/scm/linux/kernel/git/viro/bdev 2008-10-23 10:23:07 -07:00
clocksource Merge branches 'timers/clocksource', 'timers/hrtimers', 'timers/nohz', 'timers/ntp', 'timers/posixtimers' and 'timers/debug' into v28-timers-for-linus 2008-10-20 13:14:06 +02:00
connector
cpufreq
cpuidle Merge branch 'v28-range-hrtimers-for-linus-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2008-10-23 10:53:02 -07:00
crypto
dca device create: misc: convert device_create_drvdata to device_create 2008-10-16 09:24:43 -07:00
dio
dma Merge branch 'linus' into test 2008-10-23 00:11:07 -04:00
edac edac cell: fix incorrect edac_mode 2008-10-20 08:52:40 -07:00
eisa
firewire
firmware x86: sysfs: kill owner field from attribute 2008-10-20 08:52:42 -07:00
gpio mfd: twl4030-gpio driver 2008-10-22 01:19:39 +02:00
gpu Merge branch 'drm-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2008-10-23 10:18:40 -07:00
hid USB: remove warn macro from HID core 2008-10-17 14:41:09 -07:00
hwmon hwmon: applesmc: lighter wait mechanism, drastic improvement 2008-10-20 08:52:35 -07:00
i2c Merge branch 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6 2008-10-23 10:10:25 -07:00
ide Merge git://git.kernel.org/pub/scm/linux/kernel/git/viro/bdev 2008-10-23 10:23:07 -07:00
idle i7300_idle driver v1.55 2008-10-21 23:58:41 -04:00
ieee1394 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2008-10-16 15:02:24 -07:00
infiniband RDMA/cxgb3: Fix deadlock in iw_cxgb3 (hang when configuring interface) 2008-11-12 10:16:47 -08:00
input Merge branch 'for-next' of git://git.o-hand.com/linux-mfd 2008-10-20 09:22:47 -07:00
isdn device create: misc: convert device_create_drvdata to device_create 2008-10-16 09:24:43 -07:00
leds Merge git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6 2008-10-20 13:12:39 -07:00
lguest
macintosh device create: misc: convert device_create_drvdata to device_create 2008-10-16 09:24:43 -07:00
mca
md Merge git://git.kernel.org/pub/scm/linux/kernel/git/viro/bdev 2008-10-23 10:23:07 -07:00
media V4L/DVB (9336): cx88: always de-alloc frontends on fault condition 2008-10-21 14:32:12 -02:00
memstick [PATCH] switch memstick 2008-10-21 07:48:33 -04:00
message Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2008-10-23 13:02:03 -07:00
mfd mfd: check for platform_get_irq() return value in sm501 2008-10-22 01:39:55 +02:00
misc intel_menlo: fix build warning 2008-10-23 00:43:47 -04:00
mmc [PATCH] switch mmc 2008-10-21 07:48:37 -04:00
mtd [PATCH] propagate mode through open_bdev_excl/close_bdev_excl 2008-10-21 07:49:00 -04:00
net RDMA/cxgb3: Fix deadlock in iw_cxgb3 (hang when configuring interface) 2008-11-12 10:16:47 -08:00
nubus nubus: fix mis-indented statement 2008-10-16 11:21:30 -07:00
of Merge commit 'kumar/kumar-for-2.6.28' 2008-10-21 15:49:55 +11:00
oprofile Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rric/oprofile 2008-10-23 10:05:40 -07:00
parisc [PATCH] introduce fmode_t, do annotations 2008-10-21 07:47:06 -04:00
parport 8250: Oxford Semiconductor Devices 2008-10-23 09:31:09 -07:00
pci Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 2008-10-23 10:20:36 -07:00
pcmcia Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm 2008-10-23 08:12:21 -07:00
pnp Merge branch 'linus' into test 2008-10-23 00:11:07 -04:00
power Merge git://git.infradead.org/battery-2.6 2008-10-20 09:44:30 -07:00
ps3 ps3: Add passthru support for non-audio streams 2008-10-20 08:05:15 +02:00
rapidio
regulator
rtc Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6 2008-10-23 10:20:15 -07:00
s390 Merge branch 'v28-range-hrtimers-for-linus-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2008-10-23 10:53:02 -07:00
sbus
scsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2008-10-23 13:02:03 -07:00
serial 8250: Add more OxSemi devices 2008-10-23 09:35:18 -07:00
sh
sn
spi Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2008-10-16 12:40:26 -07:00
ssb
staging staging: pcc_acpi: delete obsolete driver 2008-10-23 15:31:09 -04:00
tc
telephony phonedev: remove BKL 2008-10-20 08:52:36 -07:00
thermal
uio Merge branch 'bkl-removal' of git://git.lwn.net/linux-2.6 2008-10-20 13:42:14 -07:00
usb Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6 2008-10-23 10:09:50 -07:00
uwb uwb: wrong sizeof argument in mac address compare 2008-10-20 14:37:53 +01:00
video Remove empty imacfb.c file 2008-10-20 11:32:09 -07:00
virtio
w1 x86: sysfs: kill owner field from attribute 2008-10-20 08:52:42 -07:00
watchdog watchdog: Fix warning 2008-10-23 09:19:47 -07:00
xen x86, um: ... and asm-x86 move 2008-10-22 22:55:20 -07:00
zorro
Kconfig Merge branch 'master' into for-upstream 2008-10-20 16:07:19 +01:00
Makefile Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 2008-10-23 10:20:36 -07:00