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James Clark 3244fb6dbb coresight: cti: Prevent negative values of enable count 
Writing 0 to the enable control repeatedly results in a negative value
for enable_req_count. After this, writing 1 to the enable control
appears to not work until the count returns to positive.

Change it so that it's impossible for enable_req_count to be < 0.
Return an error to indicate that the disable request was invalid.

Fixes: 835d722ba10a ("coresight: cti: Initial CoreSight CTI Driver")
Tested-by: Jinlong Mao <quic_jinlmao@quicinc.com>
Signed-off-by: James Clark <james.clark@arm.com>
Reviewed-by: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20230110110736.2709917-2-james.clark@arm.com
2023-01-16 10:10:18 +00:00
..
accel
Fix mismerge due to devnode now taking a 'const *' device
2022-12-16 13:04:15 -06:00
accessibility
…
acpi
ACPI fixes for 6.2-rc2
2022-12-30 10:47:25 -08:00
amba
ARM updates for 6.2
2022-12-13 15:22:14 -08:00
android
…
ata
ata: ahci: Fix PCS quirk application for suspend
2022-12-27 11:06:57 +09:00
atm
treewide: Convert del_timer*() to timer_shutdown*()
2022-12-25 13:38:09 -08:00
auxdisplay
…
base
Kbuild updates for v6.2
2022-12-19 12:33:32 -06:00
bcma
…
block
treewide: Convert del_timer*() to timer_shutdown*()
2022-12-25 13:38:09 -08:00
bluetooth
treewide: Convert del_timer*() to timer_shutdown*()
2022-12-25 13:38:09 -08:00
bus
Char/Misc driver changes for 6.2-rc1
2022-12-16 03:49:24 -08:00
cdrom
…
char
random: do not include <asm/archrandom.h> from random.h
2022-12-20 03:13:45 +01:00
clk
A pile of clk driver updates with a small tracepoint patch to the clk core this
2022-12-13 13:46:07 -08:00
clocksource
Updates for timers, timekeeping and drivers:
2022-12-12 12:52:02 -08:00
comedi
…
connector
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counter
…
cpufreq
linux-kselftest-next-6.2-rc1
2022-12-12 16:39:38 -08:00
cpuidle
powerpc updates for 6.2
2022-12-19 07:13:33 -06:00
crypto
powerpc updates for 6.2
2022-12-19 07:13:33 -06:00
cxl
cxl/region: Fix memdev reuse check
2022-12-08 13:03:47 -08:00
dax
…
dca
…
devfreq
…
dio
…
dma
dmaengine updates for v6.2
2022-12-19 08:54:17 -06:00
dma-buf
Driver Core changes for 6.2-rc1
2022-12-16 03:54:54 -08:00
edac
Merge branches 'edac-ghes' and 'edac-misc' into edac-updates-for-v6.2
2022-12-12 15:40:03 +01:00
eisa
…
extcon
Char/Misc driver changes for 6.2-rc1
2022-12-16 03:49:24 -08:00
firewire
…
firmware
remoteproc updates for v6.2
2022-12-21 09:37:14 -08:00
fpga
Char/Misc driver changes for 6.2-rc1
2022-12-16 03:49:24 -08:00
fsi
…
gnss
…
gpio
pwm: Changes for v6.2-rc1
2022-12-21 09:41:28 -08:00
gpu
drm-fixes for 6.2-rc2
2023-01-01 11:11:13 -08:00
greybus
…
hid
treewide: Convert del_timer*() to timer_shutdown*()
2022-12-25 13:38:09 -08:00
hsi
…
hte
…
hv
Networking changes for 6.2.
2022-12-13 15:47:48 -08:00
hwmon
hwmon updates for v6.2 merge window
2022-12-13 13:09:38 -08:00
hwspinlock
…
hwtracing
coresight: cti: Prevent negative values of enable count
2023-01-16 10:10:18 +00:00
i2c
Core got a new helper 'i2c_client_get_device_id', designware got some
2022-12-15 14:47:10 -08:00
i3c
i3c: export SETDASA method
2022-12-11 21:25:58 +01:00
idle
…
iio
Char/Misc driver changes for 6.2-rc1
2022-12-16 03:49:24 -08:00
infiniband
v6.2 merge window 2nd pull request
2022-12-17 08:23:42 -06:00
input
treewide: Convert del_timer*() to timer_shutdown*()
2022-12-25 13:38:09 -08:00
interconnect
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iommu
IOMMU Updates for Linux v6.2
2022-12-19 08:34:39 -06:00
ipack
…
irqchip
RISC-V Patches for the 6.2 Merge Window, Part 1
2022-12-14 15:23:49 -08:00
isdn
treewide: Convert del_timer*() to timer_shutdown*()
2022-12-25 13:38:09 -08:00
leds
treewide: Convert del_timer*() to timer_shutdown*()
2022-12-25 13:38:09 -08:00
macintosh
…
mailbox
- qcom: enable sc8280xp, sm8550 and sm4250 support
2022-12-21 09:31:18 -08:00
mcb
…
md
- Fix use-after-free races due to missing resource cleanup during DM
2022-12-13 10:58:09 -08:00
media
treewide: Convert del_timer*() to timer_shutdown*()
2022-12-25 13:38:09 -08:00
memory
ARM updates for 6.2
2022-12-13 15:22:14 -08:00
memstick
memstick/mspro_block: Convert to use sysfs_emit()/sysfs_emit_at() APIs
2022-12-09 10:29:58 +01:00
message
…
mfd
- New Drivers
2022-12-21 09:19:24 -08:00
misc
kernel hardening fixes for v6.2-rc1
2022-12-23 12:00:24 -08:00
mmc
MMC core:
2022-12-13 13:41:26 -08:00
most
…
mtd
MTD core changes:
2022-12-13 12:32:07 -08:00
mux
…
net
treewide: Convert del_timer*() to timer_shutdown*()
2022-12-25 13:38:09 -08:00
nfc
treewide: Convert del_timer*() to timer_shutdown*()
2022-12-25 13:38:09 -08:00
ntb
…
nubus
…
nvdimm
…
nvme
block-6.2-2022-12-29
2022-12-29 16:57:29 -08:00
nvmem
Char/Misc driver changes for 6.2-rc1
2022-12-16 03:49:24 -08:00
of
Devicetree updates for v6.2, part 2:
2022-12-20 08:48:24 -06:00
opp
…
parisc
parisc: led: Fix potential null-ptr-deref in start_task()
2022-12-17 23:19:38 +01:00
parport
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pci
phy-for-6.2
2022-12-19 08:40:58 -06:00
pcmcia
treewide: Convert del_timer*() to timer_shutdown*()
2022-12-25 13:38:09 -08:00
peci
…
perf
RISC-V Patches for the 6.2 Merge Window, Part 1
2022-12-14 15:23:49 -08:00
phy
phy-for-6.2
2022-12-19 08:40:58 -06:00
pinctrl
Pin control changes for the v6.2 kernel cycle:
2022-12-13 13:03:06 -08:00
platform
USB/Thunderbolt driver changes for 6.2-rc1
2022-12-16 03:22:53 -08:00
pnp
…
power
power supply and reset changes for the v6.2 series
2022-12-17 08:39:31 -06:00
powercap
…
pps
…
ps3
…
ptp
Networking changes for 6.2.
2022-12-13 15:47:48 -08:00
pwm
pwm: Changes for v6.2-rc1
2022-12-21 09:41:28 -08:00
rapidio
rapidio: devices: fix missing put_device in mport_cdev_open
2022-12-11 19:30:20 -08:00
ras
…
regulator
regulator: Fixes for v6.2
2022-12-23 14:38:00 -08:00
remoteproc
remoteproc: core: Do pm_relax when in RPROC_OFFLINE state
2022-12-07 11:20:55 -07:00
reset
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rpmsg
…
rtc
- New Drivers
2022-12-21 09:19:24 -08:00
s390
Driver Core changes for 6.2-rc1
2022-12-16 03:54:54 -08:00
sbus
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scsi
treewide: Convert del_timer*() to timer_shutdown*()
2022-12-25 13:38:09 -08:00
sh
…
siox
…
slimbus
…
soc
ARM: SoC fixes for 6.2
2022-12-19 16:07:59 -06:00
soundwire
soundwire updates for 6.2
2022-12-19 08:47:33 -06:00
spi
spi: Fix for v6.2
2022-12-23 14:44:08 -08:00
spmi
…
ssb
…
staging
treewide: Convert del_timer*() to timer_shutdown*()
2022-12-25 13:38:09 -08:00
target
SCSI misc on 20221213
2022-12-14 08:58:51 -08:00
tc
…
tee
SoC driver updates for 6.2
2022-12-12 10:17:08 -08:00
thermal
More thermal control updates for 6.2-rc1
2022-12-15 10:16:04 -08:00
thunderbolt
…
tty
treewide: Convert del_timer*() to timer_shutdown*()
2022-12-25 13:38:09 -08:00
ufs
SCSI misc on 20221213
2022-12-14 08:58:51 -08:00
uio
…
usb
treewide: Convert del_timer*() to timer_shutdown*()
2022-12-25 13:38:09 -08:00
vdpa
…
vfio
Driver Core changes for 6.2-rc1
2022-12-16 03:54:54 -08:00
vhost
…
video
- Fix-ups
2022-12-21 09:24:39 -08:00
virt
Char/Misc driver changes for 6.2-rc1
2022-12-16 03:49:24 -08:00
virtio
…
vlynq
…
w1
…
watchdog
linux-watchdog 6.2-rc1 tag
2022-12-17 08:34:01 -06:00
xen
drm for 6.2:
2022-12-13 11:59:58 -08:00
zorro
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Kconfig
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Makefile
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