Signed-off-by: maipbui <maibui@microsoft.com>
Dependency: [PR (#12065)](https://github.com/sonic-net/sonic-buildimage/pull/12065) needs to merge first.
#### Why I did it
`subprocess.Popen()` and `subprocess.check_output()` is used with `shell=True`, which is very dangerous for shell injection.
#### How I did it
Disable `shell=True`, enable `shell=False`
#### How to verify it
Tested on DUT, compare and verify the output between the original behavior and the new changes' behavior.
[testresults.zip](https://github.com/sonic-net/sonic-buildimage/files/9550867/testresults.zip)
- Why I did it
To update MFT package to the latest version.
- How I did it
Updated MFT_VERSION & MFT_REVISION in platform/mellanox/mft.mk.
- How to verify it
Build an image and deploy to the switch
Check MFT version by dpkg -l | grep mft
Verify that all the SONiC services up and running
Run regression testing using tests from sonic-mgmt
Signed-off-by: Volodymyr Samotiy <volodymyrs@nvidia.com>
- Why I did it
To include latest fixes and new functionality
SAI fixes and new features
fix#3205239, incorrect object type returned for SG child list
Fix VRF-VNI map entries remove issue
ECC health event and logging
[Port Buffers] restore default queue and pg configuration when all user pools are deleted
Fix EVPN type3 error on removal of uc/bc flood group
Fix EVPN type2 MAC move from local to remote results in SAI failure
Fix Disable learning on VXLAN tunnel
Fix error on VXLAN v6 tunnel removal
Fix port cannot apply schedule group when it is a lag member
Fix BFD add more detailed message on BFD packet not related to any existing session
gcc10 compilation fixes
Disable learning on VXLAN tunnel
Support BFD remote-disc exchange in negotiation stage
Tunnel Loopback packet action attribute implementation (for Dual TOR)
Add KVD resources MIN/MAX functionality (pending CRM issue with MIN only)
Support for CRC2 hash algorithm
Bulk counter support for PGs, queues
Support mirror sample rate attribute (SPC2+)
[Functional] [QoS] | Unable to remove SCHEDULE profile table even if there is no object referencing it
Next hop group optimized bulk API
Reduce verbosity of shared database already exists print
Span mirror policer (SPC2+), optimize pipeline for acl mirror action with policer on SPC2+
use same size descriptor pool for rx/tx
fix bfd - notify Sonic for admin-down event
2201 - empty list for supported fec for RJ45 ports
Fix don't disable used tunnel underlay interfaces
SDK fixes
100GbE FCI DAC (10137628-4050LF/HPE PN: 845408-B21) was recognized by mistake as supporting "cable burning' which caused the switch firmware to read page 0x9f (which unsupported in the cable) and to report this cable as having "bad eeprom".
Added remote peer UDP port information in BFD packet event.
After editing an ECMP, the resilient ECMP next-hop counter may not count correctly.
Fixed potential memory leaks in some APIs related to LPM
If TTL_CMD_COPY is used in Encap direction for a packet with no TTL, then the value passed in the ttl data structure will be used if non-zero (default 255 if zero).
In SN2201: When configuring Force mode, user should configure Speed and FEC on both sides
In Flex Tunnel encapsulation flow, if the encapsulation is with an IPv6 header, the flow label field may not be updated as expected.
In some cases, when changing speed to 400GbE over 8 lanes, the first few packets would be dropped.
In some traffic patterns involving small packets, the PortRcvErrors counter may mistakenly count events of local physical errors due to an internal flow in the hardware that involves link packets.
On Spectrum systems, sometimes during link failure, not all previous firmware indications cleared properly, potentially affecting the next link up attempt.
On the NVIDIA Spectrum-2 switch, when receiving a packet with Symbol Errors on ports that are configured to cut-thought mode, a pipeline might get stuck.
PCI calibration changes from a static to a dynamic mechanism.
SDK debug dump shows "Unknown" Counter in RFC3635 Counter Group.
SDK debug dump shows "Unknown" Counter in the PPCNT Traffic Class Counter Group.
SDK Dump missing column headers in some GC tables may result in difficulty understanding the dump.
SLL configuration is missing in SDK dump.
Spectrum-2 systems, do no support 1GbE on supported 40GbE modules.
When binding a UDP port which is already in use for BFD TX session, the error message appears incorrectly.
When Flex Tunnel was used, Flex Modifier sometimes experienced a brief mis-configuration during ISSU.
When many ports are active (e.g. 70 ports up), and the configuration of shared buffer is applied on the fly, occasionally, the firmware might get stuck.
When running 1GbE speeds on SN4600 system, the port remained active while peer side was closed.
When toggling many ports of the Spectrum devices while raising 10GbE link up and link maintenance is enabled, the switch may get stuck and may need to be rebooted.
When trying to reconfigure the Flex Parser header and Flex transition parameters after ISSU, the switch will returned an error even if the configuration was identical to that done before performing the ISSU.
While toggling the cable, and the low power mode is set to ON, an unexpected PMPE event error is received.
- How I did it
Updated SDK/SAI submodule and relevant makefiles with the required versions.
- How to verify it
Build an image and run tests from "sonic-mgmt".
Signed-off-by: Volodymyr Samotiy <volodymyrs@nvidia.com>
- Why I did it
get_rx_los and get_tx_fault is not supported via the exisitng interface used, need provide dummy implementation for them.
NOTE: in later releases we will get them back via different interface.
- How I did it
Return False * lane_num for get_rx_los and get_tx_fault
- How to verify it
Added unit test
- Why I did it
Fix a typo in chassis platform API which causes the following error
>>> import sonic_platform as P
>>> c = P.platform.Platform().get_chassis()
>>> sl = c.get_all_sfps()
>>> sl[0].get_lpmode()
Sep 28 07:48:33 INFO LOG: Initializing SX log with STDOUT as output file.
False
>>> del c
Exception ignored in: <function Chassis.__del__ at 0x7f1d166ef8b0>
Traceback (most recent call last):
File "/usr/local/lib/python3.9/dist-packages/sonic_platform/chassis.py", line 126, in __del__
self.sfp_module.deinitialize_sdk_handle(sfp_module.SFP.shared_sdk_handle)
NameError: name 'sfp_module' is not defined
- How I did it
Use self while using the SDK handle
- How to verify it
Manual test
Signed-off-by: Stephen Sun <stephens@nvidia.com>
This reverts commit 9750cb4.
There is a PR to handle 202205 branch revert: #12184
- Why I did it
The PR to be reverted introduced many notice logs every 1 minute if SFP is not plugged:
Cannot get module EEPROM information: Input/output error
Before the "bad" PR, the message format is like this:
INFO pmon#supervisord: xcvrd Cannot get module EEPROM information: Input/output error
It was truncated by rsyslog because every message is the same. However, the "bad" PR introduces SFP index to the message:
NOTICE pmon#xcvrd: Failed to get EEPROM data for sfp 39: Cannot get module EEPROM information: Input/output error
Rsyslog no longer truncate such log and many such messages are flooded to syslog.
- How I did it
Revert the PR
- How to verify it
Manual test
- Why I did it
Update SDK/FW version - 4.5.2320/2010_2320 in order to have the following fixes:
• Spectrum-3 | PCI calibration changes from a static to a dynamic mechanism.
• [VxLAN] TTL was set to 0 for non IP traffic (such as ARP)
- How I did it
Update pointer for the SDK/FW
- How to verify it
Run regression tests
- Why I did it
ethtool print error logs when EEPROM of a SFP is not available. It prints error like this:
INFO pmon#/supervisord: xcvrd Cannot get module EEPROM information: Input/output error
INFO pmon#/supervisord: xcvrd Cannot get Module EEPROM data: Invalid argument
However, this log does not contain the relevant SFP index which is hard for developer/qa to find the exactly SFP.
- How I did it
Redirect ethtool stderr to subprocess and log it better
- How to verify it
Manual test
- Why I did it
Update SDK/FW version - 4.5.2318/2010_2318 to pick up new fixes:
1. Cr space timeout on Hold and Release GW - at warm boot
2. Spectrum Port in stuck PHY_UP after peer side rebooted
3. Memory leak in sx_api_router_ecmp_update_set
- How I did it
Update the make file with the new version number
Update submodule Switch-SDK-drivers pointer
- How to verify it
Run sonic regression
Signed-off-by: Kebo Liu <kebol@nvidia.com>
- Why I did it
Update HW-MGMT to V.7.0020.3006
1. Support new system SN2201
2. Add COMEX BRDWL respin support
- How I did it
Update the version number of the makefile
Advance the hw-mgmt submodule pointer
- How to verify it
Run full regression on Nvidia platforms
Signed-off-by: Kebo Liu <kebol@nvidia.com>
- Why I did it
Add PSU input voltage and input current to mlnx platform api.
- How I did it
Implement 2 function of getting the psu voltage and psu current input:
Get the values from "power/psu{}_curr_in" , "power/psu{}_volt_in"
- How to verify it
Manual test.
Run sonic-mgmt regression
Signed-off-by: orfar1994 <orfar1994@gmail.com>
- Why I did it
Add more log while doing sysfs reading to increase the debug capability
- How I did it
Log the relevant file path and error number while sysfs reading return None
- How to verify it
Manual test
- Why I did it
Support get_port_or_cage_type for RJ45 ports
- How I did it
Implement the new platform API get_port_or_cage_type
Fix the issue: unable to import SFP when chassis object is destructed
- How to verify it
Manually test and regression test
Signed-off-by: Stephen Sun <stephens@nvidia.com>
- Why I did it
Fix bug: pmon report error on start up because some SKUs do not have hwsku.json
- How I did it
If hwsku.json, do not extract RJ45 port information
- How to verify it
Manual test.
Unit test.
- Why I did it
Add support for mellanox platform building for target architecture arm64.
- How I did it
Contains the following changes:
1. Change instances of hard-coded amd64 to $(CONFIGURED_ARCH)
2. Add logic to download correct binary for MFT package
3. Add TARGET_BOOTLOADER=grub definition to rules.mk to override default arm64 bootloader
- How to verify it
Build mellanox platform with TARGET_ARCH set as arm64
- Why I did it
Advance to new SAI version for bugs fixes as well as new features/enhacements:
New:
- ARM64 support
- FG ECMP performance optimization
- Support setting empty list for port ingress/egress buffer profile list
- Add service port for SN5600
- Add CR8/SR8/LR8/KR8 interface type
- Disable mlxtrace during debug dump
Fixes:
- Fix SAI_ACL_ENTRY_ATTR_FIELD_TC
- Fix Packets loop back if no member in portchannel
- Fix optimize descriptors apply time (and fast boot time)
- Add flush fdb entries for vxlan tunnel bridge port
- Don't disable used tunnel underlay interfaces
- How I did it
Advanced SAI submodule
- How to verify it
make configure PLATFORM=mellanox
make target/sonic-mellanox.bin
Signed-off-by: Nazarii Hnydyn <nazariig@nvidia.com>
Signed-off-by: Sudharsan Dhamal Gopalarathnam sudharsand@nvidia.com
Why I did it
During the system boot up when 'show platform status' or 'show version' command is executed before STATE_DB CHASSIS_INFO table is populated, the show will try to fallback to use the platform API. The DMI file in mellanox platforms require root permission for access. So if the show commands are executed as admin or any other user, the following error log will appear in the syslog
Jun 28 17:21:25.612123 sonic ERR show: Fail to decode DMI /sys/firmware/dmi/entries/2-0/raw due to PermissionError(13, 'Permission denied')
How I did it
Check the file permission before accessing it.
How to verify it
Added UT to verify. Manually verified if the error log is not thrown.
- Why I did it
This is for the eventual support of multiple architectures for the mellanox platform.
- How I did it
Change the location of the binaries in Switch-SDK-drivers so that the path specifies the target architecture in addition to the target distribution that the debians are built for.
This is the most straightforward way to separate binaries built against different architectures and selectively target them for installation in the mellanox SONiC image.
- How to verify it
Build SONiC for mellanox and verify it compiles successfully.
- Why I did it
To provide an ability to suppress ASAN false positives and have a clean ASAN report for docker-sonic-vs/mlnx-syncd/orchagent docker
- How I did it
Added the "print_suppressions=0" to ASAN configs.
- How to verify it
add a suppression to some ASAN-enabled component (the suppression should catch some leak)
build with ENABLE_ASAN=y
run a test and see that the ASAN report is empty instead of having the suppression summary
Signed-off-by: Yakiv Huryk <yhuryk@nvidia.com>
* Support new platform SN2201 and RJ45 port
Signed-off-by: Kebo Liu <kebol@nvidia.com>
* remove unused import and redundant function
Signed-off-by: Kebo Liu <kebol@nvidia.com>
* fix error introduced by rebase
Signed-off-by: Kebo Liu <kebol@nvidia.com>
* Revert the special handling of RJ45 ports (#56)
* Revert the special handling of RJ45 ports
sfp.py
sfp_event.py
chassis.py
Signed-off-by: Stephen Sun <stephens@nvidia.com>
* Remove deadcode
Signed-off-by: Stephen Sun <stephens@nvidia.com>
* Support CPLD update for SN2201
A new class is introduced, deriving from ComponentCPLD and overloading _install_firmware
Change _install_firmware from private (starting with __) to protected, making it overloadable
Signed-off-by: Stephen Sun <stephens@nvidia.com>
* Initialize component BIOS/CPLD
Signed-off-by: Stephen Sun <stephens@nvidia.com>
* Remove swb_amb which doesn't on DVT board any more
Signed-off-by: Stephen Sun <stephens@nvidia.com>
* Remove the unexisted sensor - switch board ambient - from platform.json
Signed-off-by: Stephen Sun <stephens@nvidia.com>
* Do not report error on receiving unknown status on RJ45 ports
Translate it to disconnect for RJ45 ports
Report error for xSFP ports
Signed-off-by: Stephen Sun <stephens@nvidia.com>
* Add reinit for RJ45 to avoid exception
Signed-off-by: Stephen Sun <stephens@nvidia.com>
Co-authored-by: Stephen Sun <5379172+stephenxs@users.noreply.github.com>
Co-authored-by: Stephen Sun <stephens@nvidia.com>
- Why I did it
"import sonic_platform" takes about 600ms ~ 1000ms, it is kind of slow. After this optimization, the time is about 100ms. The benefit is that those CLIs which does not need the slow import sentence would be faster than before.
- How I did it
Find slow import and call them when need.
- How to verify it
Measure the import time.
- Why I did it
To include latest fixes:
1. Warmboot | When trying to reconfigure the Flex Parser header and Flex transition parameters after ISSU, the switch will returned an error even if the configuration was identical to that done before performing the ISSU.
2. Link Up | When toggling many ports of the Spectrum devices while raising 10GbE link up and link maintenance is enabled, the switch may get stuck and may need to be rebooted.
3. Shared buffer | While moving from lossless to lossy while shared headroom was used, reduction of the shared headroom can only be done prior to pool type change and when shared headroom is not utilized.
- How I did it
Updated SDK submodule along with the relevant Makefiles
- How to verify it
Build an image and run tests from "sonic-mgmt".
Signed-off-by: Volodymyr Samotiy <volodymyrs@nvidia.com>
Currently, the build with ASAN_ENABLE=y reuses the packages built with
ASAN_ENABLE=n (and vice versa). To address this issue, ASAN_ENABLE is added to DEP_FLAGS for asan-enabled packages (docker-syncd-mlnx, syncd, docker-orchagent, swss).
- Why I did it
To make dpkg cache use/rebuild the packages for ASAN_ENABLE=y/n.
- How I did it
Added ASAN_ENABLE to the DEP_FLAGS for asan-enabled packages.
- How to verify it
Built with ASAN_ENABLE=y/n and checked the .flags .log files.
Signed-off-by: Yakiv Huryk <yhuryk@nvidia.com>
This is to improve the readability of ASAN reports. The debug package adds function names and source code references to the backtrace (currently, there are only binary addresses of functions)
Another way to address this issue is to build the image with "INSTALL_DEBUG_TOOLS=y". The downside of this approach is that the image size and compilation time are unnecessarily big. Also, the idea is to make the "ENABLE_ASAN" self-sufficient, which would not be the case for this approach.
- Why I did it
To improve the readability of asan logs.
- How I did it
Added SYNCD_DBG and SWSS_DBG to corresponding docker images for ASAN_ENABLE=y build
- How to verify it
Add artificial memory leak
Build with ASAN_ENABLE=y
Test the image and check the ASAN report
Signed-off-by: Yakiv Huryk <yhuryk@nvidia.com>
- Why I did it
Update MFT to newer version
- How I did it
Update MFT_VERSION in platform/mellanox/mft.mk
- How to verify it
Check version via dpkg -l | grep mft
Signed-off-by: Andriy Yurkiv <ayurkiv@nvidia.com>
- Why I did it
Script fails when there is an exception while reading
- How I did it
Add more logs and checks. Fix wrong variable naming and messages.
- How to verify it
Provoke exception while read_eeprom() and check that it is handled properly
Fixes#9279
- Why I did it
Part of larger effort to move all SONiC systems to bullseye
- How I did it
1. Update container makefiles with correct dependencies
2. Update container Dockerfile with correct base image
3. Update container Dockerfile with correct apt dependencies
4. Update any other makefiles with dependencies to remove python2 support
5. Minor changes to support bullseye / python3
- How to verify it
Run regression on the switch:
1. Verify PTF community tests work
2. Verify syncd runs and all ports come up / pass traffic
3. Verify all platform tests succeed
Update SDK/FW to 4.5.1500/2010.1500 and SAI version to 1.21.1.1
SDK/FW features:
1. Added support for Finisar DR4 (FTCD4523E2PCM) on Spectrum-2 and Spectrum-3 systems.
SAI Features:
1. ECMP overlay support for IPv6
2. BFD offloading / 4K scale
3. Host interface user traps + improved trap registration (table entry)
4. gcc11 compilation fixes
5. Read support for ACL redirect action
6. Optimize ECMP DB size
7. Buffer descriptors new defaults
8. Updated port mapping for SN2201
SAI Fixes:
1. Debug counter removal when configured with all drop reasons
- Why I did it
Upgrade Mellanox SDK and SAI versions to latest
- How I did it
Updated submodule pointers
- How to verify it
Regression tested
Currently, the build dockers are created as a user dockers(docker-base-stretch-<user>, etc) that are
specific to each user. But the sonic dockers (docker-database, docker-swss, etc) are
created with a fixed docker name and common to all the users.
docker-database:latest
docker-swss:latest
When multiple builds are triggered on the same build server that creates parallel building issue because
all the build jobs are trying to create the same docker with latest tag.
This happens only when sonic dockers are built using native host dockerd for sonic docker image creation.
This patch creates all sonic dockers as user sonic dockers and then, while
saving and loading the user sonic dockers, it rename the user sonic
dockers into correct sonic dockers with tag as latest.
docker-database:latest <== SAVE/LOAD ==> docker-database-<user>:tag
The user sonic docker names are derived from 'DOCKER_USERNAME and DOCKER_USERTAG' make env
variable and using Jinja template, it replaces the FROM docker name with correct user sonic docker name for
loading and saving the docker image.
- Why I did it
InvalidPsuVolWA.run might raise exception if user power off PSU when it is running. This exception is not caught and will be raised to psud which causes psud failed to update PSU data to DB.
- How I did it
1. Change the log level when WA does not work. This could happen when user power off PSU, hence changing the log level from error to warning is better
2. Change the wait time from 5 to 1 to avoid introduce too much delay in psud. 1 second is usually enough per my test
3. Give a default return value for function get_voltage_low_threshold and get_voltage_high_threshold to avoid exception reach to psud
- How to verify it
Manual test.
Run sonic-mgmt regression
- Why I did it
Implement newly added reboot causes in PR Azure/sonic-platform-common#277
- How I did it
Map the reboot cause sysfs to the newly added reboot causes.
- How to verify it
manual test, check whether the reboot cause is correct after rebooting the switch in various ways.
run the community reboot test to see whether the reboot cause checker is passing.
Signed-off-by: Kebo Liu <kebol@nvidia.com>
Why I did it
To support address sanitizer for Mellanox syncd
How I did it
/var/log/asan is mapped for syncd container (the same as for swss)
container stop() has a timeout (60s) for syncd (the same as for swss)
This is so libasan has enough time to generate a report.
added ASAN's log path to Mellanox syncd supervisord.conf
added "asan: yes" to sonic_version.yml
How to verify it
Added artificial memory leaks
Compiled with ENABLE_ASAN=y
Installed the image on DUT
Rebooted the DUT
Verified that /var/log/asan/syncd-asan.log contains the leaks
Signed-off-by: Yakiv Huryk <yhuryk@nvidia.com>
- Why I did it
There is a hardware bug that PSU voltage threshold sysfs returns incorrect value. The workaround is to call "sensor -s" to refresh it.
- How I did it
Call "sensor -s" when the threshold value is not incorrect and PSU is "DELTA 1100"
- How to verify it
Unit test and Manual test
- Why I did it
Take new hw-mgmt release to SONiC, including:
New features:
1. hw-mgmt: add to PSU FW upgrade tool command to show current FW version
2. hw-mgmt: add to PSU FW upgrade tool support for single-PSU-in-the-system FW upgrade
3. hw-mgmt: add attribute “/firmware” to show FW version of restricted upgradable PSUs only
4. hw-mgmt: Add NVME temperature reports attributes (_alarm/_crit/_min/_max)
Bug fix:
1. psu: redundant i2c_addr attributes being created for psu 3 & 4 in system having only 2 psus.
2. hw-mgmt: in SPC1/2 i2c driver removal is too slow vs. ASIC reset causing non-functional log errors
3. PSU thresholds sysfs changed in 5.10 to “read only” preventing modification (modification required due PSU HW bug)
4. CPLD3 sysfs attribute missing after chip down/up flow
5. sysfs attributes missing when hw-mgmt is restarted (stop/start) within systemd
Release notes can be found from link https://github.com/Mellanox/hw-mgmt/blob/V.7.0020.2004/debian/Release.txt
- How I did it
Update hw-mgmt make file with new version number
Update hw-mgmt submodule pointer
- How to verify it
Run platform regression on all Mellanox platform
Signed-off-by: Kebo Liu <kebol@nvidia.com>
- Why I did it
Implement read_eeprom/write_eeprom API for Credo Y-cable for Dual ToR Active-Standby
- How I did it
Use mlxreg utility for API implementation
Signed-off-by: Andriy Yurkiv <ayurkiv@nvidia.com>
- Why I did it
Update NVIDIA Copyright header to "mellanox" files which were changed since 1.1.2022
- How I did it
Update the copyright header
- How to verify it
Sanity tests and PR checkers.
- Why I did it
Refactor SFP code to remove code duplication and to be able to use the latest features available in new APIs.
- How I did it
Refactor SFP code to remove code duplication and to be able to use the latest features available in new APIs.
- How to verify it
Run sonic-mgmt/platform_tests/sfp tests
- Why I did it
With the previous MFT 4.18.1-16 there is a bug in mstdump tool accessing wrong address. it is confirmed this issue does not exist in official 4.18.0-106.
- How I did it
Update the MFT version to 4.18.0-106
- How to verify it
Run regression on Mellanox platforms
Why I did it
Add CPU thermal control for Nvidia platforms which will be enabled for platforms that have heavy CPU load. Now it is only enabled on 4800, and it will be enabled on future platforms.
How I did it
Check CPU pack temperature and update cooling level accordingly
How to verify it
Manual test
Added sonic-mgmt test case, PR link will update later
- Why I did it
Fix issue: psu might use wrong voltage sysfs which causes invalid voltage value. The flow is like:
1. User power off a PSU
2. All sysfs files related to this PSU are removed
3. User did a reboot/config reload
4. PSU will use wrong sysfs as voltage node
- How I did it
Always try find an existing sysfs.
- How to verify it
Manual test
- Why I did it
The latest upgrade of Mellanox hw-mgmt V7.0020.1300 introduced a couple new kernel modules for new Mellanox platforms that have yet to be upstreamed to the linux kernel.
As these new platforms do not have SONiC support we elected not to upstream these new drivers to sonic-linux-kernel but hw-mgmt expects them to exist which is causing a non-functional error on switch boot.
Feb 15 00:09:55.374130 r-leopard-simx-74 ERR systemd-modules-load[269]: Failed to find module 'emc2305'
Feb 15 00:09:55.374141 r-leopard-simx-74 ERR systemd-modules-load[269]: Failed to find module 'ads1015'
To resolve this we can patch hw-mgmt to no longer attempt to load these modules by default.
- How I did it
Added a SONiC patch to Mellanox hw-mgmt in order to remove the unused kernel modules which were not upstreamed to sonic-linux-kernel
- How to verify it
Boot switch and verify there are no error logs regarding kernel modules failing to load.
- Why I did it
In SONiC thermal control algorithm, it compares thermal zone temperature with thermal zone threshold. Previously, a thermal zone with no thermal sensor can still get its threshold. However, a recently driver patch changes this behavior: a thermal zone with no thermal sensor will return 0 for threshold. We need to ignore such thermal zone.
- How I did it
Ignore thermal zones whose temperature is 0.
- How to verify it
Added unit test case and Manual test
