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Linu Cherian bd2767ec3d coresight: Fix run time warnings while reusing ETR buffer 
Fix the below warning by avoding calls to tmc_etr_enable_hw,
if we are reusing the ETR buffer for multiple sources in sysfs mode.

echo 1 > /sys/bus/coresight/devices/tmc_etr0/enable_sink
echo 1 > /sys/bus/coresight/devices/ete1/enable_source
echo 1 > /sys/bus/coresight/devices/ete2/enable_source
[  166.918290] ------------[ cut here ]------------
[  166.922905] WARNING: CPU: 4 PID: 2288 at
drivers/hwtracing/coresight/coresight-tmc-etr.c:1037
tmc_etr_enable_hw+0xb0/0xc8
[  166.933862] Modules linked in:
[  166.936911] CPU: 4 PID: 2288 Comm: bash Not tainted 6.5.0-rc7 #132
[  166.943084] Hardware name: Marvell CN106XX board (DT)
[  166.948127] pstate: 834000c9 (Nzcv daIF +PAN -UAO +TCO +DIT -SSBS
BTYPE=--)
[  166.955083] pc : tmc_etr_enable_hw+0xb0/0xc8
[  166.959345] lr : tmc_enable_etr_sink+0x134/0x210
snip..
  167.038545] Call trace:
[  167.040982]  tmc_etr_enable_hw+0xb0/0xc8
[  167.044897]  tmc_enable_etr_sink+0x134/0x210
[  167.049160]  coresight_enable_path+0x160/0x278
[  167.053596]  coresight_enable+0xd4/0x298
[  167.057510]  enable_source_store+0x54/0xa0
[  167.061598]  dev_attr_store+0x20/0x40
[  167.065254]  sysfs_kf_write+0x4c/0x68
[  167.068909]  kernfs_fop_write_iter+0x128/0x200
[  167.073345]  vfs_write+0x1ac/0x2f8
[  167.076739]  ksys_write+0x74/0x110
[  167.080132]  __arm64_sys_write+0x24/0x38
[  167.084045]  invoke_syscall.constprop.0+0x58/0xf8
[  167.088744]  do_el0_svc+0x60/0x160
[  167.092137]  el0_svc+0x40/0x170
[  167.095273]  el0t_64_sync_handler+0x100/0x130
[  167.099621]  el0t_64_sync+0x190/0x198
[  167.103277] ---[ end trace 0000000000000000 ]---
-bash: echo: write error: Device or resource busy

Fixes: 296b01fd106e ("coresight: Refactor out buffer allocation function for ETR")
Signed-off-by: Linu Cherian <lcherian@marvell.com>
Reviewed-by: James Clark <james.clark@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20230823042948.12879-1-lcherian@marvell.com
2023-09-15 16:09:18 +01:00
..
accel
Short summary of fixes pull:
2023-09-08 06:36:36 +10:00
accessibility
…
acpi
More thermal control updates for 6.6-rc1
2023-09-04 15:17:28 -07:00
amba
amba: bus: fix refcount leak
2023-08-22 15:50:57 +02:00
android
Char/Misc driver changes for 6.6-rc1
2023-09-01 09:53:54 -07:00
ata
SCSI misc on 20230909
2023-09-09 12:01:33 -07:00
atm
…
auxdisplay
drm for 6.6-rc1
2023-08-30 13:34:34 -07:00
base
Driver core changes for 6.6-rc1
2023-09-01 09:43:18 -07:00
bcma
…
block
block-6.6-2023-09-08
2023-09-08 21:39:54 -07:00
bluetooth
TTY/Serial driver changes for 6.6-rc1
2023-09-01 09:38:00 -07:00
bus
Char/Misc driver changes for 6.6-rc1
2023-09-01 09:53:54 -07:00
cache
cache: Add L2 cache management for Andes AX45MP RISC-V core
2023-09-01 09:08:59 -07:00
cdrom
…
cdx
…
char
tpm: Enable hwrng only for Pluton on AMD CPUs
2023-09-04 21:57:59 +03:00
clk
This pull request is full of clk driver changes. In fact, there aren't any
2023-08-30 19:53:39 -07:00
clocksource
Updates for clocksource/clockevent drivers:
2023-09-04 13:15:57 -07:00
comedi
…
connector
…
counter
- New Drivers
2023-09-04 13:47:59 -07:00
cpufreq
cpufreq: Support per-policy performance boost
2023-08-29 20:51:40 +02:00
cpuidle
powerpc updates for 6.6
2023-08-31 12:43:10 -07:00
crypto
This update includes the following changes:
2023-08-29 11:23:29 -07:00
cxl
…
dax
mm: remove enum page_entry_size
2023-08-24 16:20:30 -07:00
dca
…
devfreq
…
dio
…
dma
dmaengine updates for v6.6
2023-09-03 10:49:42 -07:00
dma-buf
drm for 6.6-rc1
2023-08-30 13:34:34 -07:00
edac
Intel EDAC fixes:
2023-08-30 19:23:00 -07:00
eisa
…
extcon
…
firewire
…
firmware
RISC-V Patches for the 6.6 Merge Window, Part 2 (try 2)
2023-09-09 14:25:11 -07:00
fpga
…
fsi
fsi: i2cr: Switch to use struct i2c_driver's .probe()
2023-08-22 15:51:33 +02:00
genpd
ARM: SoC drivers for 6.6
2023-08-30 16:42:21 -07:00
gnss
…
gpio
gpio: zynq: restore zynq_gpio_irq_reqres/zynq_gpio_irq_relres callbacks
2023-09-06 17:08:51 +02:00
gpu
drm ci for 6.6-rc1
2023-09-10 11:55:26 -07:00
greybus
…
hid
for-linus-2023083101
2023-09-01 12:31:44 -07:00
hsi
…
hte
hte: Explicitly include correct DT includes
2023-08-28 13:31:06 -05:00
hv
hyperv-next for v6.6
2023-09-04 11:26:29 -07:00
hwmon
Char/Misc driver changes for 6.6-rc1
2023-09-01 09:53:54 -07:00
hwspinlock
…
hwtracing
coresight: Fix run time warnings while reusing ETR buffer
2023-09-15 16:09:18 +01:00
i2c
I2C has mainly cleanups this time and a few driver improvements. Because
2023-09-04 13:44:11 -07:00
i3c
i3c: master: svc: fix probe failure when no i3c device exist
2023-09-06 01:21:47 +02:00
idle
Perf events changes for v6.6:
2023-08-28 16:35:01 -07:00
iio
Char/Misc driver changes for 6.6-rc1
2023-09-01 09:53:54 -07:00
infiniband
SCSI misc on 20230902
2023-09-02 12:02:41 -07:00
input
Input updates for 6.6 merge window:
2023-09-06 09:24:25 -07:00
interconnect
This pull request is full of clk driver changes. In fact, there aren't any
2023-08-30 19:53:39 -07:00
iommu
IOMMU Updates for Linux v6.6
2023-09-01 16:54:25 -07:00
ipack
…
irqchip
Documentation work keeps chugging along; stuff for 6.6 includes:
2023-08-30 20:05:42 -07:00
isdn
…
leds
- Core Frameworks
2023-09-04 13:52:58 -07:00
macintosh
powerpc updates for 6.6
2023-08-31 12:43:10 -07:00
mailbox
mailbox: qcom-ipcc: fix incorrect num_chans counting
2023-09-05 10:11:01 -05:00
mcb
…
md
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
media
media: dvb: symbol fixup for dvb_attach()
2023-09-09 08:15:11 +01:00
memory
…
memstick
…
message
…
mfd
spi: Updates for v6.6
2023-08-29 09:47:33 -07:00
misc
Char/Misc driver changes for 6.6-rc1
2023-09-01 09:53:54 -07:00
mmc
TTY/Serial driver changes for 6.6-rc1
2023-09-01 09:38:00 -07:00
most
…
mtd
- New Drivers
2023-09-04 13:47:59 -07:00
mux
mux: Explicitly include correct DT includes
2023-08-28 13:36:24 -05:00
net
Including fixes from netfilter and bpf.
2023-09-07 18:33:07 -07:00
nfc
NFC: nxp: add NXP1002
2023-08-30 18:32:24 -07:00
ntb
ntb: Check tx descriptors outstanding instead of head/tail for tx queue
2023-08-22 12:38:19 -04:00
nubus
…
nvdimm
nvdimm changes for v6.6 merge window
2023-08-30 20:52:08 -07:00
nvme
for-6.6/block-2023-08-28
2023-08-29 20:21:42 -07:00
nvmem
nvmem: core: Notify when a new layout is registered
2023-08-23 16:34:02 +02:00
of
Devicetree updates for v6.6:
2023-08-30 16:59:03 -07:00
opp
…
parisc
parisc: ccio-dma: Create private runway procfs root entry
2023-08-28 18:00:27 +02:00
parport
TTY/Serial driver changes for 6.6-rc1
2023-09-01 09:38:00 -07:00
pci
pci-v6.6-fixes-1
2023-09-09 11:35:28 -07:00
pcmcia
…
peci
…
perf
arm64 fixes for -rc1
2023-09-08 12:48:37 -07:00
phy
phy-for-6.6
2023-09-03 10:38:02 -07:00
pinctrl
Pin control bulk changes for the v6.6 kernel cycle:
2023-08-30 19:36:19 -07:00
platform
USB / Thunderbolt / PHY driver update for 6.6-rc1
2023-09-01 09:23:34 -07:00
pnp
…
power
thermal: Use thermal_tripless_zone_device_register()
2023-09-05 21:42:18 +02:00
powercap
powercap: intel_rapl: Fix invalid setting of Power Limit 4
2023-09-06 22:21:22 +02:00
pps
…
ps3
…
ptp
…
pwm
pwm: Changes for v6.6-rc1
2023-09-07 18:05:58 -07:00
rapidio
…
ras
…
regulator
regulator: Fixes for v6.6
2023-09-07 15:51:07 -07:00
remoteproc
remoteproc updates for v6.6
2023-09-04 15:12:26 -07:00
reset
This pull request is full of clk driver changes. In fact, there aren't any
2023-08-30 19:53:39 -07:00
rpmsg
rpmsg updates for v6.6
2023-09-04 15:08:52 -07:00
rtc
RTC for 6.6
2023-09-07 16:07:35 -07:00
s390
block-6.6-2023-09-08
2023-09-08 21:39:54 -07:00
sbus
sbus: Explicitly include correct DT includes
2023-08-28 13:36:24 -05:00
scsi
SCSI misc on 20230909
2023-09-09 12:01:33 -07:00
sh
…
siox
…
slimbus
…
soc
soc: renesas: Kconfig: For ARCH_R9A07G043 select the required configs if dependencies are met
2023-09-08 11:25:29 -07:00
soundwire
soundwire updates for 6.6
2023-09-03 10:20:57 -07:00
spi
spi: Fixes for v6.6
2023-09-07 15:49:20 -07:00
spmi
…
ssb
…
staging
media: dvb: symbol fixup for dvb_attach()
2023-09-09 08:15:11 +01:00
target
SCSI misc on 20230902
2023-09-02 12:02:41 -07:00
tc
…
tee
…
thermal
thermal: core: Drop thermal_zone_device_register()
2023-09-05 21:42:18 +02:00
thunderbolt
…
tty
TTY/Serial driver changes for 6.6-rc1
2023-09-01 09:38:00 -07:00
ufs
Merge branch 'fixes' into misc
2023-09-02 08:25:19 +01:00
uio
…
usb
just cleanups and fixes
2023-09-07 10:35:14 -07:00
vdpa
virtio: features
2023-09-04 10:43:44 -07:00
vfio
iommufd for 6.6
2023-08-30 20:41:37 -07:00
vhost
vdpa: add get_backend_features vdpa operation
2023-09-03 18:10:22 -04:00
video
- New Functionality
2023-09-06 09:00:37 -07:00
virt
minmax: add in_range() macro
2023-08-24 16:20:18 -07:00
virtio
virtio_ring: fix avail_wrap_counter in virtqueue_add_packed
2023-09-03 18:10:24 -04:00
vlynq
…
w1
…
watchdog
linux-watchdog 6.6-rc1 tag
2023-09-06 09:19:12 -07:00
xen
dma-maping updates for Linux 6.6
2023-08-29 20:32:10 -07:00
zorro
…
Kconfig
Merge patch series "Add non-coherent DMA support for AX45MP"
2023-09-08 11:24:34 -07:00
Makefile
Merge patch series "Add non-coherent DMA support for AX45MP"
2023-09-08 11:24:34 -07:00