Hello:
This patch was applied to qcom/linux.git (refs/heads/for-next):
On Mon, 2 Nov 2020 21:02:25 +0100 you wrote:
> nr_rings is reset to 1, but when this function is called for a second
> (and third!) time nr_rings > 1 is false, thus the else case is entered
> to set up a buffer for the RPTR shadow and consequently written to
> RB_RPTR_ADDR, hanging platforms without WHERE_AM_I firmware support.
>
> Restructure the condition in such a way that shadow buffer setup only
> ever happens when has_whereami is true; otherwise preemption is only
> finalized when the number of ring buffers has not been reset to 1 yet.
>
> [...]
Here is the summary with links:
- drm/msm: a5xx: Make preemption reset case reentrant
https://git.kernel.org/qcom/c/7cc29fcdfcc8
You are awesome, thank you!
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