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linux/drivers/video
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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
..
aty
Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6
2010-10-25 08:19:14 -07:00
backlight
backlight: grab ops_lock before testing bd->ops
2010-11-25 06:50:47 +09:00
console
BKL: remove extraneous #include <smp_lock.h>
2010-11-17 08:59:32 -08:00
display
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
geode
lxfb: Maintain video processor palette through suspend/resume
2010-12-01 18:18:56 +09:00
i810
i2c: Remove unneeded inclusions of <linux/i2c-id.h>
2010-10-24 18:16:58 +02:00
intelfb
i2c: Remove unneeded inclusions of <linux/i2c-id.h>
2010-10-24 18:16:58 +02:00
kyro
…
logo
fbdev: move logo externs to header file
2009-06-16 19:47:57 -07:00
matrox
drivers/video/matrox/matroxfb_maven.c: fix unsigned return type
2010-10-27 18:03:08 -07:00
mb862xx
of/device: Replace struct of_device with struct platform_device
2010-08-06 09:25:50 -06:00
mbx
llseek: automatically add .llseek fop
2010-10-15 15:53:27 +02:00
msm
drivers/video/msm/mddi.c: Remove multiple KERN_<level> uses
2010-10-27 13:43:21 -07:00
nvidia
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
omap
drivers/video/omap/blizzard.c: suspected typo in assignment
2010-10-27 18:03:08 -07:00
omap2
OMAP: VRAM: Fix boot-time memory allocation
2010-11-10 20:51:13 +09:00
pnx4008
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
riva
i2c: Delete unused adapter IDs
2010-11-15 22:40:38 +01:00
savage
savagefb: fix DDC for Savage 4
2010-10-27 18:03:08 -07:00
sis
sisfb: delete osdef.h
2010-11-24 16:03:22 +09:00
vermilion
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
via
Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6
2010-10-28 09:35:11 -07:00
68328fb.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
acornfb.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
acornfb.h
…
amba-clcd.c
VIDEO: amba clcd: don't disable an already disabled clock
2010-08-17 22:15:09 +01:00
amifb.c
m68k: amiga - Frame buffer platform device conversion
2010-05-17 21:37:43 +02:00
arcfb.c
Update broken web addresses in the kernel.
2010-10-18 11:03:14 +02:00
arkfb.c
arkfb: fix misplaced parentheses
2009-04-01 08:59:32 -07:00
asiliantfb.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
atafb_iplan2p2.c
…
atafb_iplan2p4.c
…
atafb_iplan2p8.c
…
atafb_mfb.c
…
atafb_utils.h
…
atafb.c
fbdev: atafb - Remove undead ifdef ATAFB_FALCON
2010-10-22 09:43:25 +02:00
atafb.h
…
atmel_lcdfb.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
au1100fb.c
VIDEO: Au1100fb: Fix section mismatch
2010-07-26 19:08:15 +01:00
au1100fb.h
…
au1200fb.c
replace nested max/min macros with {max,min}3 macro
2010-10-26 16:52:12 -07:00
au1200fb.h
…
bf54x-lq043fb.c
fix printk typo 'faild'
2010-08-09 11:25:17 +02:00
bfin-lq035q1-fb.c
fbdev: bfin-lq035q1-fb: respect new PPI mode platform field
2010-05-25 08:07:08 -07:00
bfin-t350mcqb-fb.c
fix printk typo 'faild'
2010-08-09 11:25:17 +02:00
broadsheetfb.c
broadsheetfb: support storing waveform
2010-03-12 15:52:34 -08:00
bt431.h
…
bt455.h
…
bw2.c
of/device: Replace struct of_device with struct platform_device
2010-08-06 09:25:50 -06:00
c2p_core.h
fbdev: c2p/atafb - Add support for Atari interleaved bitplanes
2009-01-12 20:56:31 +01:00
c2p_iplan2.c
fbdev: c2p/atafb - Add support for Atari interleaved bitplanes
2009-01-12 20:56:31 +01:00
c2p_planar.c
fbdev: c2p - Rename c2p to c2p_planar
2009-01-12 20:56:32 +01:00
c2p.h
fbdev: c2p - Rename c2p to c2p_planar
2009-01-12 20:56:32 +01:00
carminefb_regs.h
…
carminefb.c
fix typos concerning "initiali[zs]e"
2010-06-16 18:05:05 +02:00
carminefb.h
…
cfbcopyarea.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
cfbfillrect.c
fbdev: fix fillrect for 24bpp modes
2009-05-06 16:36:10 -07:00
cfbimgblt.c
…
cg3.c
of/device: Replace struct of_device with struct platform_device
2010-08-06 09:25:50 -06:00
cg6.c
of/device: Replace struct of_device with struct platform_device
2010-08-06 09:25:50 -06:00
cg14.c
of/device: Replace struct of_device with struct platform_device
2010-08-06 09:25:50 -06:00
chipsfb.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
cirrusfb.c
m68k: amiga - Zorro bus modalias support
2010-05-17 21:37:41 +02:00
clps711xfb.c
clps711xfb: convert to proc_fops
2009-12-16 07:20:04 -08:00
cobalt_lcdfb.c
cocbalt_lcdfb: correct sections
2010-05-03 15:42:58 +02:00
controlfb.c
of/address: Clean up function declarations
2010-08-01 01:42:42 -06:00
controlfb.h
…
cyber2000fb.c
cyber2000fb: fix console in truecolor modes
2010-07-30 23:29:33 +01:00
cyber2000fb.h
…
da8xx-fb.c
video: da8xx: Register IRQ as last thing in driver probing.
2010-12-01 18:18:52 +09:00
dnfb.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
edid.h
…
efifb.c
efifb: support the EFI framebuffer on more Apple hardware
2010-09-22 17:22:39 -07:00
ep93xx-fb.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
epson1355fb.c
Update broken web addresses in the kernel.
2010-10-18 11:03:14 +02:00
fb_ddc.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
fb_defio.c
fb_defio: redo fix for non-dirty ptes
2010-06-04 15:21:45 -07:00
fb_draw.h
fbdev: fix fillrect for 24bpp modes
2009-05-06 16:36:10 -07:00
fb_notify.c
…
fb_sys_fops.c
…
fbcmap.c
framebuffer: fix fbcmap.c kernel-doc warning
2010-11-26 15:05:08 +09:00
fbcvt.c
Update broken web addresses in the kernel.
2010-10-18 11:03:14 +02:00
fbmem.c
fbmem: fix fb_read, fb_write unaligned accesses
2010-10-27 18:03:08 -07:00
fbmon.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
fbsysfs.c
fbdev: allow passing more than one aperture for handoff
2010-05-18 16:19:27 +10:00
ffb.c
of/device: Replace struct of_device with struct platform_device
2010-08-06 09:25:50 -06:00
fm2fb.c
m68k: amiga - Zorro bus modalias support
2010-05-17 21:37:41 +02:00
fsl-diu-fb.c
of/device: Replace struct of_device with struct platform_device
2010-08-06 09:25:50 -06:00
g364fb.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
gbefb.c
drivers/video/gbefb.c: eliminate memory leak
2010-10-27 18:03:08 -07:00
gxt4500.c
…
hecubafb.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
hgafb.c
fbdev: section cleanup in hgafb
2010-05-25 08:07:08 -07:00
hitfb.c
hitfb: fix sections
2010-05-25 08:07:09 -07:00
hpfb.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
igafb.c
drivers/video/igafb.c: make igafb_setup() and igafb_init() static
2010-08-11 08:59:12 -07:00
imsttfb.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
imxfb.c
ARM: 6281/1: video/imxfb.c: allow usage without BACKLIGHT_CLASS_DEVICE
2010-08-10 22:10:51 +01:00
jz4740_fb.c
FBDEV: JZ4740: Add framebuffer driver
2010-08-05 13:26:17 +01:00
Kconfig
Merge branch 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6
2010-10-26 18:57:59 -07:00
leo.c
of/device: Replace struct of_device with struct platform_device
2010-08-06 09:25:50 -06:00
macfb.c
macfb: fix 24-bit visual and stuff
2010-02-27 18:31:16 +01:00
macmodes.c
fbdev: add some missing mac modes
2010-02-27 18:31:14 +01:00
macmodes.h
…
Makefile
Merge master.kernel.org:/pub/scm/linux/kernel/git/lethal/genesis-2.6 into devel-stable
2010-08-06 18:13:19 +01:00
maxinefb.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
metronomefb.c
Update broken web addresses in the kernel.
2010-10-18 11:03:14 +02:00
modedb.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
mx3fb.c
ARM mx3fb: check for DMA engine type
2010-11-15 09:25:01 +01:00
n411.c
…
neofb.c
…
nuc900fb.c
drivers/video/nuc900fb.c: fix lcd build error
2010-06-29 15:29:32 -07:00
nuc900fb.h
NUC900 LCD Controller Driver
2010-03-12 15:52:34 -08:00
offb.c
of/address: Clean up function declarations
2010-08-01 01:42:42 -06:00
output.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
p9100.c
of/device: Replace struct of_device with struct platform_device
2010-08-06 09:25:50 -06:00
platinumfb.c
of/device: Replace struct of_device with struct platform_device
2010-08-06 09:25:50 -06:00
platinumfb.h
…
pm2fb.c
tree-wide: s/widht/width/g typo in comments
2010-02-05 12:22:42 +01:00
pm3fb.c
…
pmag-aa-fb.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
pmag-ba-fb.c
VIDEO: PMAG-BA: Fix section mismatch
2010-07-26 19:08:14 +01:00
pmagb-b-fb.c
VIDEO: PMAGB-B: Fix section mismatch
2010-07-26 19:08:15 +01:00
ps3fb.c
powerpc/cell: Move CBE_IOPTE_* to <asm/cell-regs.h>
2009-08-20 10:29:26 +10:00
pvr2fb.c
sh: Fix up more 64-bit pgprot truncation on SH-X2 TLB.
2010-02-17 13:23:00 +09:00
pxa168fb.c
ARM: pxa168fb: add .remove function
2010-10-09 17:07:23 +08:00
pxa168fb.h
fb: add support of LCD display controller on pxa168/910 (base layer)
2009-06-13 00:09:09 +08:00
pxafb.c
[ARM] pxafb: fix building issue of incorrect reference
2009-12-29 14:11:27 +08:00
pxafb.h
…
q40fb.c
fbdev/m68k: Fix section mismatches in q40fb.c
2010-10-22 09:43:25 +02:00
s1d13xxxfb.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
s3c2410fb.c
s3c2410fb: fix sections
2010-05-25 08:07:09 -07:00
s3c2410fb.h
s3c-fb: CPUFREQ frequency scaling support
2009-06-16 19:47:59 -07:00
s3c-fb.c
s3c-fb: automatically calculate pixel clock when none is given
2010-08-11 08:59:12 -07:00
s3fb.c
add support for S3 Trio3D/1X/2X
2010-05-27 09:12:42 -07:00
sa1100fb.c
platform-drivers: move probe to .devinit.text in drivers/video
2010-03-07 17:04:50 -08:00
sa1100fb.h
sa1100fb: fix color component length for pseudocolor modes
2009-04-13 15:04:29 -07:00
sbuslib.c
…
sbuslib.h
…
sgivwfb.c
sgivwfb: fix sections
2010-05-25 08:07:09 -07:00
sh7760fb.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
sh_mipi_dsi.c
fbdev: sh_mobile_lcdcfb: Support multiple video modes in platform data
2010-09-14 17:22:38 +09:00
sh_mobile_hdmi.c
fbdev: sh_mobile_hdmi: properly clean up modedb on monitor unplug
2010-11-10 16:53:12 +09:00
sh_mobile_lcdcfb.c
fbdev: sh_mobile_lcdcfb: fix bug in reconfig()
2010-11-16 10:11:28 +09:00
sh_mobile_lcdcfb.h
fbdev: sh_mobile_lcdc: reconfigure the framebuffer, when free
2010-09-16 16:36:17 +09:00
skeletonfb.c
fbdev: fix color component field length documentation
2009-04-13 15:04:29 -07:00
sm501fb.c
tree-wide: Assorted spelling fixes
2010-02-09 11:13:56 +01:00
sstfb.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
sticore.h
…
stifb.c
tree-wide: fix assorted typos all over the place
2009-12-04 15:39:55 +01:00
sunxvr500.c
Merge branch 'master' into export-slabh
2010-04-05 11:37:28 +09:00
sunxvr1000.c
of/device: Replace struct of_device with struct platform_device
2010-08-06 09:25:50 -06:00
sunxvr2500.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
svgalib.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
syscopyarea.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
sysfillrect.c
fbdev: fix fillrect for 24bpp modes
2009-05-06 16:36:10 -07:00
sysimgblt.c
…
tcx.c
of/device: Replace struct of_device with struct platform_device
2010-08-06 09:25:50 -06:00
tdfxfb.c
VIDEO: Correct use of request_region/request_mem_region
2010-08-05 13:25:38 +01:00
tgafb.c
fix typos concerning "initiali[zs]e"
2010-06-16 18:05:05 +02:00
tmiofb.c
drivers/video/tmiofb.c: fix uninitialised return value
2009-09-23 07:39:57 -07:00
tridentfb.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
uvesafb.c
param: use ops in struct kernel_param, rather than get and set fns directly
2010-08-11 23:04:13 +09:30
valkyriefb.c
valkyriefb: various fixes
2010-02-27 18:31:13 +01:00
valkyriefb.h
valkyriefb: various fixes
2010-02-27 18:31:13 +01:00
vesafb.c
vesafb: fix comment a typo
2010-08-16 15:14:03 +02:00
vfb.c
fbdev: section cleanup in vfb
2010-05-25 08:07:08 -07:00
vga16fb.c
fbdev: section cleanup in vga16fb
2010-05-25 08:07:08 -07:00
vgastate.c
…
vt8623fb.c
param: simple locking for sysfs-writable charp parameters
2010-08-11 23:04:31 +09:30
w100fb.c
drivers/video/w100fb.c: ignore void return value / fix build failure
2010-08-09 20:44:53 -07:00
w100fb.h
…
xen-fbfront.c
xen/fb: fix xenfb suspend/resume race.
2011-01-10 10:46:30 -05:00
xilinxfb.c
fbdev/xilinxfb: Microblaze driver support
2010-10-21 16:04:51 +10:00