Re: 回复: [REGRESSION] amdgpu: async system error exception from hdp_v5_0_flush_hdp()

[Alexey Klimov]

On Wed Apr 16, 2025 at 4:12 AM BST, Fugang Duan wrote:
> 发件人: Alexey Klimov <alexey.klimov at linaro.org> 发送时间: 2025年4月16日 2:28
>>#regzbot introduced: v6.12..v6.13

[..]

>>The only change related to hdp_v5_0_flush_hdp() was
>>cf424020e040 drm/amdgpu/hdp5.0: do a posting read when flushing HDP
>>
>>Reverting that commit ^^ did help and resolved that problem. Before sending
>>revert as-is I was interested to know if there supposed to be a proper fix for
>>this or maybe someone is interested to debug this or have any suggestions.
>>
> Can you revert the change and try again https://gitlab.com/linux-kernel/linux/-/commit/cf424020e040be35df05b682b546b255e74a420f

Please read my email in the first place.
Let me quote just in case:

>The only change related to hdp_v5_0_flush_hdp() was
>cf424020e040 drm/amdgpu/hdp5.0: do a posting read when flushing HDP

>Reverting that commit ^^ did help and resolved that problem.

Thanks,
Alexey