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Konrad Rzeszutek Wilk b1df4a56bf xen/pciback: Restore configuration space when detaching from a guest. 
The commit "xen/pciback: Don't deadlock when unbinding." was using
the version of pci_reset_function which would lock the device lock.
That is no good as we can dead-lock. As such we swapped to using
the lock-less version and requiring that the callers
of 'pcistub_put_pci_dev' take the device lock. And as such
this bug got exposed.

Using the lock-less version is  OK, except that we tried to
use 'pci_restore_state' after the lock-less version of
__pci_reset_function_locked - which won't work as 'state_saved'
is set to false. Said 'state_saved' is a toggle boolean that
is to be used by the sequence of a) pci_save_state/pci_restore_state
or b) pci_load_and_free_saved_state/pci_restore_state. We don't
want to use a) as the guest might have messed up the PCI
configuration space and we want it to revert to the state
when the PCI device was binded to us. Therefore we pick
b) to restore the configuration space.

We restore from our 'golden' version of PCI configuration space, when an:
 - Device is unbinded from pciback
 - Device is detached from a guest.

Reported-by:  Sander Eikelenboom <linux@eikelenboom.it>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
 		2014-12-04 12:42:02 +00:00
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accessibility
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acpi ACPI / PM: Ignore wakeup setting if the ACPI companion can't wake up 2014-11-20 01:24:16 +01:00
amba PM / Domains: Move dev_pm_domain_attach|detach() to pm_domain.h 2014-09-30 01:16:44 +02:00
ata ahci: fix AHCI parameters not taken into account 2014-11-04 12:56:25 -05:00
atm solos-pci: fix error return code 2014-11-23 14:29:44 -05:00
auxdisplay
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base Merge branches 'pm-domains', 'pm-sleep' and 'pm-cpufreq' 2014-11-14 15:17:32 +01:00
bcma bcma: add another PCI ID of device with BCM43228 2014-10-23 14:02:06 -04:00
block zram: avoid kunmap_atomic() of a NULL pointer 2014-11-13 16:17:05 -08:00
bluetooth Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2014-10-13 11:28:42 +02:00
bus ARM: SoC driver updates for 3.18 2014-10-08 17:37:16 -04:00
cdrom
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char virtio: bugfix for 3.18 2014-11-13 18:07:52 -08:00
clk clk: pxa: fix pxa27x CCCR bit usage 2014-11-17 11:25:29 -08:00
clocksource clockevent: sun4i: Fix race condition in the probe code 2014-11-19 10:43:51 +01:00
connector
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cpufreq cpufreq: Avoid crash in resume on SMP without OPP 2014-11-08 02:10:04 +01:00
cpuidle Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-10-24 12:48:47 -07:00
crypto crypto: caam - fix missing dma unmap on error path 2014-11-06 23:10:20 +08:00
dca
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devfreq PM / devfreq: exynos: Enable building exynos PPMU as module 2014-09-29 20:22:36 +09:00
dio
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dma Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma 2014-11-21 16:24:27 -08:00
dma-buf dma-buf: don't open-code atomic_long_read() 2014-10-09 02:39:07 -04:00
edac e7xxx_edac: Report CE events properly 2014-10-22 22:59:00 +02:00
eisa
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extcon
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firewire firewire: cdev: prevent kernel stack leaking into ioctl arguments 2014-11-14 12:10:13 +01:00
firmware Merge branch 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-10-23 14:45:09 -07:00
fmc
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gpio This is the bulk of GPIO changes for the v3.18 development 2014-10-09 14:58:15 -04:00
gpu Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux 2014-11-30 16:21:37 -08:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2014-11-13 16:19:14 -08:00
hsi
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hv
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hwmon hwmon: (g762) fix call to devm_hwmon_device_register_with_groups() 2014-11-19 14:06:47 -08:00
hwspinlock
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i2c i2c: core: Dispose OF IRQ mapping at client removal time 2014-11-07 19:03:18 +01:00
ide Merge branch 'for-3.18/drivers' of git://git.kernel.dk/linux-block 2014-10-18 12:12:45 -07:00
idle
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iio iio: accel: bmc150: set low default thresholds 2014-11-16 20:25:00 +00:00
infiniband Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2014-11-21 16:28:45 -08:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2014-11-27 17:51:50 -08:00
iommu IOMMU Updates for Linux v3.18 2014-10-15 07:23:49 +02:00
ipack
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irqchip irqchip: brcmstb-l2: Fix error handling of irq_of_parse_and_map 2014-11-26 06:28:42 +00:00
isdn isdn/gigaset: fix usb_gigaset write_cmd result race 2014-10-14 15:05:35 -04:00
leds Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2014-10-21 08:18:38 -07:00
lguest
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macintosh powerpc: Move via-cuda symbol exports next to function definitions 2014-09-25 23:14:37 +10:00
mailbox Merge branch 'mailbox-for-linus' of git://git.linaro.org/landing-teams/working/fujitsu/integration 2014-10-21 11:21:19 -07:00
mcb
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md One fix for md for 3.18. 2014-11-16 15:34:31 -08:00
media [media] sp2: sp2_init() can be static 2014-11-03 19:08:06 -02:00
memory
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memstick memstick: r592: fix build warnings for !PM_SLEEP 2014-10-14 02:18:22 +02:00
message SCSI for-linus on 20141007 2014-10-07 21:29:18 -04:00
mfd mfd: twl4030-power: Fix poweroff with PM configuration enabled 2014-11-10 15:22:04 +00:00
misc cxl: Fix PSL error due to duplicate segment table entries 2014-10-28 19:52:52 +11:00
mmc mmc: core: fix card detection regression 2014-11-05 09:28:48 +01:00
mtd Three main MTD fixes for 3.18: 2014-11-02 14:45:52 -08:00
net Merge tag 'master-2014-11-25' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless 2014-11-26 16:38:35 -05:00
nfc Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless 2014-10-07 14:48:29 -04:00
ntb ntb: Adding split BAR support for Haswell platforms 2014-10-17 07:08:51 -04:00
nubus
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of of/selftest: Fix testing when /aliases is missing 2014-11-20 15:32:49 +00:00
oprofile
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parisc Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-10-13 16:23:15 +02:00
parport
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pci PCI: Expose pci_load_saved_state for public consumption. 2014-12-04 12:42:02 +00:00
pcmcia
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phy phy: omap-usb2: Enable runtime PM of omap-usb2 phy properly 2014-11-05 14:34:06 -08:00
pinctrl pinctrl: baytrail: show output gpio state correctly on Intel Baytrail 2014-10-28 11:16:26 +01:00
platform platform: hp_accel: Add SERIO_I8042 as a dependency since it now includes i8042.h/serio.h 2014-11-10 21:16:15 -08:00
pnp PNP: replace strnicmp with strncasecmp 2014-10-14 02:18:25 +02:00
power power supply and reset changes for the v3.18-rc 2014-11-15 15:22:51 -08:00
powercap
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pps
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ps3
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ptp
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pwm pwm: Changes for v3.18-rc1 2014-10-21 08:17:43 -07:00
rapidio
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ras
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regulator Merge remote-tracking branches 'regulator/fix/max1586', 'regulator/fix/max77686', 'regulator/fix/max77693', 'regulator/fix/max77802', 'regulator/fix/max8860' and 'regulator/fix/s2mpa01' into regulator-linus 2014-11-05 14:59:25 +00:00
remoteproc
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reset
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rpmsg
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rtc drivers/rtc/rtc-bq32k.c: fix register value 2014-10-29 16:33:14 -07:00
s390 KVM: s390: virtio_ccw: remove unused variable 2014-11-03 10:43:00 +01:00
sbus
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scsi SCSI fixes on 20141128 2014-11-29 10:15:31 -08:00
sfi
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sh
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sn
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soc soc: versatile: Add terminating entry for realview_soc_of_match 2014-10-28 22:05:07 +01:00
spi Merge remote-tracking branches 'spi/fix/dw' and 'spi/fix/sirf' into spi-linus 2014-11-26 19:05:25 +00:00
spmi
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ssb This is the bulk of GPIO changes for the v3.18 development 2014-10-09 14:58:15 -04:00
staging staging: r8188eu: Add new device ID for DLink GO-USB-N150 2014-11-27 08:55:01 -08:00
target target: return CONFLICT only when SA key unmatched 2014-11-02 22:04:57 -08:00
tc
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thermal thermal: Exynos: Deletion of unnecessary checks before two function calls 2014-11-21 15:20:17 -04:00
thunderbolt
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tty Revert "serial: of-serial: add PM suspend/resume support" 2014-11-25 12:46:39 -08:00
uio uio: Export definition of struct uio_device 2014-10-02 21:35:54 -07:00
usb usb-quirks: Add reset-resume quirk for MS Wireless Laser Mouse 6000 2014-11-24 17:01:55 -08:00
uwb
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vfio IOMMU Updates for Linux v3.18 2014-10-15 07:23:49 +02:00
vhost vhost-scsi: Take configfs group dependency during VHOST_SCSI_SET_ENDPOINT 2014-10-28 13:54:16 -07:00
video Merge branch '3.18/omapdss-fixes' into 3.18/fbdev-fixes 2014-10-30 14:53:49 +02:00
virt
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virtio One cc: stable commit, the rest are a series of minor cleanups which have 2014-10-18 10:25:09 -07:00
vlynq
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vme
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w1
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watchdog watchdog: meson: remove magic value for reboot 2014-10-20 21:09:17 +02:00
xen xen/pciback: Restore configuration space when detaching from a guest. 2014-12-04 12:42:02 +00:00
zorro
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Kconfig soc: ti: add Keystone Navigator QMSS driver 2014-09-24 09:49:14 -04:00
Makefile
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