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turnip/a650: unrecoverable hang and reboot while running glmark2 trace via Zink

GPU: a650, hang doesn't happen on a630
Kernel: 5.10-rc4 with some upstream patches for better faults handling

The trace of glmark2[1] causes unrecoverable hang in a half of its runs. It doesn't hang on a630 gpu though.

The only thing I found is that bfdd1d8d "zink: add a second descriptor manager" does increase the chance of the hang.

[1] https://gitlab.freedesktop.org/mesa/mesa/uploads/6177ffee4e54a729d30acd9c31bf63cf/glmark2.trace

CC: @robclark if you have time to check it on chromebook.

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