2d29b8b01e
Ported from RadeonSI.
This also explains all the flakes on Tahiti, see
9329f2c15b for reference.
Cc: mesa-stable
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30074>