** Changed in: linux (Ubuntu Bionic)
Status: In Progress => Fix Committed
** Changed in: linux (Ubuntu Disco)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1853990
Title:
[roce-1126]RDMA/hns: Fixs hw access invalid dma memory error
Status in kunpeng920:
In Progress
Status in kunpeng920 ubuntu-18.04 series:
In Progress
Status in kunpeng920 ubuntu-18.04-hwe series:
Fix Committed
Status in kunpeng920 ubuntu-19.04 series:
In Progress
Status in kunpeng920 ubuntu-19.10 series:
Fix Released
Status in kunpeng920 upstream-kernel series:
Fix Released
Status in linux package in Ubuntu:
Invalid
Status in linux source package in Bionic:
Fix Committed
Status in linux source package in Disco:
Fix Committed
Bug description:
[Impact]
With SMMU enabled, kill RDMA process will cause unexpected SMMU event
[Testcase]
Kill RMDA process several times and check console output
[Regression Risk]
Only RDMA/hns driver modified. lowest risk to other drivers/platforms
[Bug Description]
When smmu is enable, if execute the perftest command and then use 'kill
-9' to exit, follow this operation repeatedly, the kernel will have a high
probability to print the following smmu event:
arm-smmu-v3 arm-smmu-v3.1.auto: event 0x10 received:
arm-smmu-v3 arm-smmu-v3.1.auto: 0x00007d0000000010
arm-smmu-v3 arm-smmu-v3.1.auto: 0x0000020900000080
arm-smmu-v3 arm-smmu-v3.1.auto: 0x00000000f47cf000
arm-smmu-v3 arm-smmu-v3.1.auto: 0x00000000f47cf000
This is because the hw will periodically refresh the qpc cache until the
next reset.
This patch fixed it by removing the action that release qpc memory in the
'hns_roce_qp_free' function.
[Steps to Reproduce]
1. load hns-roce-hw-v2.ko and open smmu
2. run rdma app
3. kill RoCE process
[Actual Results]
fail
[Expected Results]
success
[Reproducibility]
Inevitably
[Additional information]
Hardware: D06
Firmware: NA
Kernel: NA
[Resolution]
RDMA/hns: Fixs hw access invalid dma memory error
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