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0c1f845772
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Chris Wilson 0c1f845772 drm/i915: Avoid refcount_inc on known zero count 
In intel_wakeref_auto, we use refcount_inc_not_zero to detect the first
use and initialise the timer. On doing so, we have to avoid using
refcount_inc on that zero count as the debug code flags that as an
error:
	refcount_t: increment on 0; use-after-free.

Rearrange the code so that if we know the count is 0 and we are
initialising, we explicitly set it to 1.

Fixes: b27e35ae5b18 ("drm/i915: Keep user GGTT alive for a minimum of 250ms")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190528154053.22004-1-chris@chris-wilson.co.uk
2019-05-29 13:15:39 +01:00
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accessibility
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 70
2019-05-24 17:36:47 +02:00
acpi
Second round of arm64 fixes for -rc2
2019-05-24 11:03:26 -07:00
amba
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
android
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
ata
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 125
2019-05-24 17:39:03 +02:00
atm
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 37
2019-05-24 17:27:11 +02:00
auxdisplay
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base
More power management updates for 5.2-rc1
2019-05-15 08:46:44 -07:00
bcma
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block
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 91
2019-05-24 17:37:53 +02:00
bluetooth
Bluetooth: hci_qca: Rename STATE_<flags> to QCA_<flags>
2019-05-05 19:34:00 +02:00
bus
ARM: SoC-related driver updates
2019-05-16 09:19:14 -07:00
cdrom
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 1
2019-05-21 11:28:39 +02:00
char
Fix a soft lockup regression when reading from /dev/random in early boot
2019-05-26 08:30:16 -07:00
clk
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 21
2019-05-21 11:28:47 +02:00
clocksource
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2019-05-21 11:28:40 +02:00
connector
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
counter
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
cpufreq
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 118
2019-05-24 17:39:02 +02:00
cpuidle
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
crypto
SPDX update for 5.2-rc2, round 1
2019-05-21 12:33:38 -07:00
dax
libnvdimm fixes v5.2-rc2
2019-05-25 10:11:23 -07:00
dca
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 33
2019-05-24 17:27:11 +02:00
devfreq
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2019-05-21 10:50:46 +02:00
dio
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
dma
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 40
2019-05-24 17:27:12 +02:00
dma-buf
drm-misc-next for v5.3, try :
2019-05-28 08:59:11 +10:00
edac
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13
2019-05-21 11:28:45 +02:00
eisa
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
extcon
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
firewire
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
firmware
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2019-05-21 10:50:46 +02:00
fmc
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2019-05-24 17:36:45 +02:00
fpga
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
fsi
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2019-05-21 10:50:46 +02:00
gnss
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
gpio
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 111
2019-05-24 17:39:01 +02:00
gpu
drm/i915: Avoid refcount_inc on known zero count
2019-05-29 13:15:39 +01:00
hid
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
hsi
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
hv
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hwmon
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 118
2019-05-24 17:39:02 +02:00
hwspinlock
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hwtracing
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
i2c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 114
2019-05-24 17:39:01 +02:00
i3c
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
ide
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61
2019-05-24 17:36:45 +02:00
idle
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
iio
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 71
2019-05-24 17:36:47 +02:00
infiniband
SPDX update for 5.2-rc2, round 1
2019-05-21 12:33:38 -07:00
input
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 64
2019-05-24 17:36:46 +02:00
interconnect
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
iommu
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
ipack
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
irqchip
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 4
2019-05-21 11:28:40 +02:00
isdn
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 90
2019-05-24 17:37:53 +02:00
leds
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 89
2019-05-24 17:37:52 +02:00
lightnvm
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
macintosh
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 118
2019-05-24 17:39:02 +02:00
mailbox
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2019-05-21 11:28:45 +02:00
mcb
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
md
libnvdimm fixes v5.2-rc2
2019-05-25 10:11:23 -07:00
media
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 122
2019-05-24 17:39:03 +02:00
memory
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61
2019-05-24 17:36:45 +02:00
memstick
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 17
2019-05-21 11:28:46 +02:00
message
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
mfd
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61
2019-05-24 17:36:45 +02:00
misc
Features:
2019-05-28 09:26:52 +10:00
mmc
SPDX update for 5.2-rc2, round 2
2019-05-24 14:31:58 -07:00
mtd
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 102
2019-05-24 17:39:00 +02:00
mux
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net
SPDX update for 5.2-rc2, round 2
2019-05-24 14:31:58 -07:00
nfc
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 123
2019-05-24 17:39:03 +02:00
ntb
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
nubus
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
nvdimm
libnvdimm fixes v5.2-rc2
2019-05-25 10:11:23 -07:00
nvme
for-linus-20190524
2019-05-24 16:02:14 -07:00
nvmem
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
of
of_net: Fix missing of_find_device_by_node ref count drop
2019-05-13 08:52:37 -07:00
opp
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
oprofile
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parisc
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
parport
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
pci
pci-v5.2-changes
2019-05-14 10:30:10 -07:00
pcmcia
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
perf
First round of arm64 fixes for -rc2
2019-05-22 08:36:16 -07:00
phy
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 118
2019-05-24 17:39:02 +02:00
pinctrl
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13
2019-05-21 11:28:45 +02:00
platform
SPDX update for 5.2-rc2, round 2
2019-05-24 14:31:58 -07:00
pnp
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 118
2019-05-24 17:39:02 +02:00
power
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 1
2019-05-21 11:28:39 +02:00
powercap
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
pps
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61
2019-05-24 17:36:45 +02:00
ps3
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
ptp
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61
2019-05-24 17:36:45 +02:00
pwm
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 118
2019-05-24 17:39:02 +02:00
rapidio
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 7
2019-05-21 11:28:40 +02:00
ras
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
regulator
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
remoteproc
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
reset
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
rpmsg
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rtc
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 114
2019-05-24 17:39:01 +02:00
s390
dax: Arrange for dax_supported check to span multiple devices
2019-05-20 15:02:08 -07:00
sbus
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61
2019-05-24 17:36:45 +02:00
scsi
SCSI fixes on 20190524
2019-05-24 17:30:28 -07:00
sfi
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
sh
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
siox
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
slimbus
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sn
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
soc
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
soundwire
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
spi
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 39
2019-05-24 17:27:12 +02:00
spmi
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
ssb
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
staging
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
target
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
tc
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
tee
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
thermal
thermal: rcar_gen3_thermal: Update temperature conversion method
2019-05-23 21:58:25 -07:00
thunderbolt
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
tty
RISC-V Patches for the 5.2 Merge Window, Part 1 v3
2019-05-19 09:56:36 -07:00
uio
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61
2019-05-24 17:36:45 +02:00
usb
treewide: prefix header search paths with $(srctree)/
2019-05-18 11:49:57 +09:00
uwb
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
vfio
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
vhost
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
video
drm-misc-next for v5.3, try :
2019-05-28 08:59:11 +10:00
virt
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
virtio
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 102
2019-05-24 17:39:00 +02:00
visorbus
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
vlynq
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 102
2019-05-24 17:39:00 +02:00
vme
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
w1
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 94
2019-05-24 17:37:53 +02:00
watchdog
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61
2019-05-24 17:36:45 +02:00
xen
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 81
2019-05-24 17:37:51 +02:00
zorro
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
Kconfig
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Makefile
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