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731f3ab66a
kernel-ark/drivers
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Joe Jin 731f3ab66a xen/fb: fix xenfb suspend/resume race. 
When migrating guests over a long period we hit this:

<1>BUG: unable to handle kernel paging request at 0000000b819fdb98
<1>IP: [<ffffffff812a588f>] notify_remote_via_irq+0x13/0x34
<4>PGD 94b10067 PUD 0
<0>Oops: 0000 [#1] SMP
.. snip..
Call Trace:
 [<ffffffff812712c9>] xenfb_send_event+0x5c/0x5e
 [<ffffffff8100ea5f>] ? xen_restore_fl_direct_end+0x0/0x1
 [<ffffffff81438d80>] ? _spin_unlock_irqrestore+0x16/0x18
 [<ffffffff812714ee>] xenfb_refresh+0x1b1/0x1d7
 [<ffffffff81270568>] ? sys_imageblit+0x1ac/0x458
 [<ffffffff81271786>] xenfb_imageblit+0x2f/0x34
 [<ffffffff8126a3e5>] soft_cursor+0x1b5/0x1c8
 [<ffffffff8126a137>] bit_cursor+0x4b6/0x4d7
 [<ffffffff8100ea5f>] ? xen_restore_fl_direct_end+0x0/0x1
 [<ffffffff81438d80>] ? _spin_unlock_irqrestore+0x16/0x18
 [<ffffffff81269c81>] ? bit_cursor+0x0/0x4d7
 [<ffffffff812656b7>] fb_flashcursor+0xff/0x111
 [<ffffffff812655b8>] ? fb_flashcursor+0x0/0x111
 [<ffffffff81071812>] worker_thread+0x14d/0x1ed
 [<ffffffff81075a8c>] ? autoremove_wake_function+0x0/0x3d
 [<ffffffff81438d80>] ? _spin_unlock_irqrestore+0x16/0x18
 [<ffffffff810716c5>] ? worker_thread+0x0/0x1ed
 [<ffffffff810756e3>] kthread+0x6e/0x76
 [<ffffffff81012dea>] child_rip+0xa/0x20
 [<ffffffff81011fd1>] ? int_ret_from_sys_call+0x7/0x1b
 [<ffffffff8101275d>] ? retint_restore_args+0x5/0x6
 [<ffffffff81012de0>] ? child_rip+0x0/0x20
Code: 6b ff 0c 8b 87 a4 db 9f 81 66 85 c0 74 08 0f b7 f8 e8 3b ff ff ff c9
c3 55 48 89 e5 48 83 ec 10 0f 1f 44 00 00 89 ff 48 6b ff 0c <8b> 87 a4 db 9f
81 66 85 c0 74 14 48 8d 75 f0 0f b7 c0 bf 04 00
RIP  [<ffffffff812a588f>] notify_remote_via_irq+0x13/0x34
 RSP <ffff8800e7bf7bd0>
CR2: 0000000b819fdb98
---[ end trace 098b4b74827595d0 ]---

The root cause of the panic is the race between the resume and reconnect to the backend.

Clearing the 'update_wanted' flag of xenfb before disconnecting from the
backend fixes this issue.

Signed-off-by: Joe Jin <joe.jin@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Tested-by: Gurudas Pai <gurudas.pai@oracle.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
2011-01-10 10:46:30 -05:00
..
accessibility
acpi ACPI: debugfs custom_method open to non-root 2010-11-13 09:52:16 -08:00
amba
ata sata_via: apply magic FIFO fix to vt6420 too 2010-11-19 13:16:26 -05:00
atm
auxdisplay
base
block Merge branch 'rbd-sysfs' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client 2010-12-02 08:05:22 -08:00
bluetooth
cdrom
char tpm: Autodetect itpm devices 2010-11-30 09:18:01 +11:00
clocksource
connector
cpufreq
cpuidle
crypto Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2010-11-13 09:55:56 -08:00
dca
dio
dma dma: shdma: add a MODULE_ALIAS() to allow module autoloading 2010-11-25 16:29:41 +09:00
edac EDAC, MCE: Fix edac_init_mce_inject error handling 2010-11-22 15:35:32 +01:00
eisa
firewire Merge branch 'fwnet' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2010-11-28 12:24:20 -08:00
firmware
gpio cs5535-gpio: apply CS5536 errata workaround for GPIOs 2010-12-02 14:51:15 -08:00
gpu drm/radeon/kms: add workaround for dce3 ddc line vbios bug 2010-12-01 12:13:37 +10:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2010-12-02 17:40:04 -08:00
hwmon hwmon: (lis3lv02d_i2c) Fix compile warnings 2010-11-22 12:23:39 -08:00
i2c i2c/algos: convert Kconfig to use the menu's `visible' keyword 2010-11-22 11:27:35 -02:00
ide
idle
ieee802154
infiniband Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband 2010-12-02 12:10:56 -08:00
input parisc: Fix GSC PS/2 driver name for keyboard and mouse 2010-12-04 11:19:59 -05:00
isdn isdn: icn: Fix stack corruption bug. 2010-11-24 11:19:05 -08:00
leds leds: fix up dependencies 2010-12-02 14:51:15 -08:00
lguest
macintosh leds: fix up dependencies 2010-12-02 14:51:15 -08:00
mca
md md: Call blk_queue_flush() to establish flush/fua support 2010-11-24 16:40:33 +11:00
media Merge branch 'rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 2010-12-05 16:41:13 -08:00
memstick
message SCSI host lock push-down 2010-11-16 13:33:23 -08:00
mfd
misc drivers/misc/isl29020.c: remove incorrect kfree in isl29020_remove() 2010-11-25 06:50:47 +09:00
mmc mmc: sdhci: 8-bit bus width changes 2010-11-22 15:12:04 -05:00
mtd UBI: fix corrupted PEB detection for NOR flash 2010-12-03 15:49:21 +02:00
net Merge branch 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6 2010-12-02 12:58:16 -08:00
nubus
of
oprofile
parisc parisc: KittyHawk LCD fix 2010-12-04 11:18:25 -05:00
parport
pci Merge branch 'drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile 2010-11-25 07:42:03 +09:00
pcmcia ARM: 6456/1: Fix for building DEBUG with sa11xx_base.c as a module. 2010-12-04 12:47:48 +00:00
platform
pnp BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
power
pps
ps3
rapidio rapidio: use resource_size() 2010-11-12 07:55:30 -08:00
regulator regulator: fix kernel-doc for set_consumer_device_supply 2010-11-30 15:13:25 +00:00
rtc
s390 [S390] qdio: free indicator after reset is finished 2010-11-25 09:52:59 +01:00
sbus
scsi SCSI: arm fas216: fix missing ';' 2010-11-23 22:26:23 +00:00
serial Merge branch 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6 2010-12-02 12:58:16 -08:00
sfi
sh Merge branch 'common/clkfwk' into sh-fixes-for-linus 2010-11-19 16:43:23 +09:00
sn
spi atmel_spi: fix warning In function 'atmel_spi_dma_map_xfer' 2010-11-30 17:23:24 +01:00
ssb ssb: b43-pci-bridge: Add new vendor for BCM4318 2010-11-22 15:19:31 -05:00
staging Merge branch 'staging-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6 2010-12-02 12:59:11 -08:00
tc
telephony
thermal
tty Merge branch 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6 2010-12-02 12:58:16 -08:00
uio
usb Merge branch 'for-greg' of git://gitorious.org/usb/usb into work 2010-11-30 15:52:04 -08:00
uwb
vhost vhost/net: fix rcu check usage 2010-11-25 11:29:16 +02:00
video xen/fb: fix xenfb suspend/resume race. 2011-01-10 10:46:30 -05:00
virtio virtio: fix format of sysfs driver/vendor files 2010-11-24 15:21:12 +10:30
vlynq
w1
watchdog watchdog: it8712f_wdt: add note to Kconfig 2010-12-02 14:10:32 +00:00
xen xen/irq: Cleanup the find_unbound_irq 2010-12-09 16:02:35 -05:00
zorro BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
Kconfig
Makefile