ef40f2ccc2
We reserved space for chaining by subtracting 4 words from max_dw, but
then the new alignment code in radv_amdgpu_cs_finalize ended up running
all over that. That resulted in going over buffer size when chaining.
When lucky you'd get a crash, and when unlucky other stuff might happen.
This always adds the 4 words at the end, but initializes with NOP by
default. That way we still adhere to the alignment rules.
Fixes: 1f36f6b83f ("radv/winsys: use same IBs padding as the kernel")
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14644>
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