Pierre-Eric Pelloux-Prayer
813e60f1ea
If the first time the preamble is written, one of the rings
isn't allocated, we wouldn't write the RING_SIZE to the preamble.
Later, when the preamble gets updated after the ring allocation,
the new RING_SIZE packet would overwrite other packets.
To prevent this, always write the RING_SIZE (the alternative would
be to write NOP packets).
This fix "*ERROR* Illegal register access in command stream" hangs
I observed on GFX8.
Fixes: 32c7805ccc ("radeonsi: merge all preamble states into one")
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16962>
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