[RFC] reading GPU register cause reset

[Tom Psyborg]

Hi

Using 4.9.133 on RS780 chipset (HD3200) with radeon.dpm=1 setting and
noticed the following problem:

Reading gpu_reset through debug fs by issuing

sudo cat /sys/kernel/debug/dri/0/radeon_gpu_reset

causes GPU to reset and sometimes to freeze or garble screen output as
you can see on screenshot, the value returned is always 0.

Shouldn't GPU reset only on echoing 1 to this register?

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