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Prarit Bhargava ee527cd3a2 Use stop_machine_run in the Intel RNG driver 
Replace call_smp_function with stop_machine_run in the Intel RNG driver.

CPU A has done read_lock(&lock)
CPU B has done write_lock_irq(&lock) and is waiting for A to release the lock.

A third CPU calls call_smp_function and issues the IPI.  CPU A takes CPU
C's IPI.  CPU B is waiting with interrupts disabled and does not see the
IPI.  CPU C is stuck waiting for CPU B to respond to the IPI.

Deadlock.

The solution is to use stop_machine_run instead of call_smp_function
(call_smp_function should not be called in situations where the CPUs may be
suspended).

[haruo.tomita@toshiba.co.jp: fix a typo in mod_init()]
[haruo.tomita@toshiba.co.jp: fix memory leak]
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Cc: Jan Beulich <jbeulich@novell.com>
Cc: "Tomita, Haruo" <haruo.tomita@toshiba.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08 11:15:00 -07:00
..
acorn
acpi Fix section mismatch of memory hotplug related code. 2007-05-08 11:14:57 -07:00
amba uevent: use add_uevent_var() instead of open coding it 2007-04-27 10:57:29 -07:00
ata Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm 2007-05-06 13:20:10 -07:00
atm PCI: Cleanup the includes of <linux/pci.h> 2007-05-02 19:02:35 -07:00
auxdisplay
base Introduce CONFIG_HAS_DMA 2007-05-07 12:12:51 -07:00
block mm: remove destroy_dirty_buffers from invalidate_bdev() 2007-05-07 12:12:55 -07:00
bluetooth [Bluetooth] Correct SCO buffer for another Broadcom based dongle 2007-05-05 00:36:22 +02:00
cdrom mm: remove destroy_dirty_buffers from invalidate_bdev() 2007-05-07 12:12:55 -07:00
char Use stop_machine_run in the Intel RNG driver 2007-05-08 11:15:00 -07:00
clocksource ACPI: correct pathname in comment 2007-04-25 14:27:06 -04:00
connector [NETLINK]: Switch cb_lock spinlock to mutex and allow to override it 2007-04-25 22:29:03 -07:00
cpufreq [CPUFREQ] cleanup kconfig options 2007-04-26 14:32:03 -04:00
crypto [CRYPTO] padlock: Remove pointless padlock module 2007-05-02 22:08:26 +10:00
dio
dma [PATCH] rm pointless dmaengine exports 2007-03-16 19:25:03 -07:00
edac
eisa [PATCH] drivers/eisa/pci_eisa.c:pci_eisa_init() should be init 2007-03-27 09:05:15 -07:00
fc4
firmware remove "struct subsystem" as it is no longer needed 2007-05-02 18:57:59 -07:00
hid Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jikos/hid 2007-04-30 08:58:21 -07:00
hwmon Apple SMC driver (hardware monitoring and control) 2007-05-08 11:15:00 -07:00
i2c remove software_suspend() 2007-05-07 12:12:59 -07:00
ide ide-cs: recognize 2GB CompactFlash from Transcend 2007-05-05 22:03:51 +02:00
ieee1394 PCI: Cleanup the includes of <linux/pci.h> 2007-05-02 19:02:35 -07:00
infiniband Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband 2007-05-07 12:18:21 -07:00
input sh: hp6xx driver compile fixes. 2007-05-07 02:10:54 +00:00
isdn PCI: Cleanup the includes of <linux/pci.h> 2007-05-02 19:02:35 -07:00
kvm KVM: Remove unused 'instruction_length' 2007-05-03 10:52:32 +03:00
leds
macintosh CUDA ADB fixes 2007-05-04 17:59:07 -07:00
mca
md mm: remove destroy_dirty_buffers from invalidate_bdev() 2007-05-07 12:12:55 -07:00
media cx88-video build fix 2007-05-07 12:13:04 -07:00
message Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2007-05-05 13:30:44 -07:00
mfd [PATCH] drivers/mfd/sm501.c: fix an off-by-one 2007-04-02 10:06:08 -07:00
misc Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc 2007-05-04 21:44:34 -07:00
mmc Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm 2007-05-06 13:20:10 -07:00
mtd slab allocators: Remove SLAB_DEBUG_INITIAL flag 2007-05-07 12:12:57 -07:00
net Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2007-05-07 12:23:31 -07:00
nubus
oprofile [PATCH] oprofile: fix potential deadlock on oprofilefs_lock 2007-03-28 13:58:02 -07:00
parisc Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2007-05-04 19:36:58 -07:00
parport [PARPORT] SUNBPP: Fix OOPS when debugging is enabled. 2007-04-23 23:33:17 -07:00
pci Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6 2007-05-04 18:04:48 -07:00
pcmcia add new_id to PCMCIA drivers 2007-05-07 12:12:50 -07:00
pnp PNP: stop using the subsystem rwsem 2007-04-27 10:57:30 -07:00
ps3 ps3av: Use __func__ instead of __FUNCTION__ 2007-05-04 17:59:09 -07:00
rapidio
rtc Blackfin: on-chip RTC controller driver 2007-05-07 12:12:58 -07:00
s390 Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2007-05-05 13:30:44 -07:00
sbus PCI: Cleanup the includes of <linux/pci.h> 2007-05-02 19:02:35 -07:00
scsi [SCSI] esp_scsi: Fix section mismatch warnings. 2007-05-07 14:05:03 -07:00
serial Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6 2007-05-07 12:22:48 -07:00
sh
sn
spi spi_s3c24xx.c: Fix build 2007-05-07 12:13:04 -07:00
tc [PATCH] Fix build error on zs serial driver 2007-04-04 21:12:47 -07:00
telephony
usb ehci-ps3, ohci-ps3: fix compilation 2007-05-07 12:13:04 -07:00
video [VIDEO] sunxvr2500: Fix PCI device ID table. 2007-05-07 14:02:51 -07:00
w1
zorro Amiga Zorro bus: kill resource_size_t warnings 2007-05-04 17:59:08 -07:00
Kconfig
Makefile i2c: Add i2c_board_info and i2c_new_device() 2007-05-01 23:26:31 +02:00