Ben Skeggs e071f8cd71
drm/nouveau: handle fifo pusher errors better ...
The most important part of this change is that we now instruct PFIFO to
drop all pending fetches, rather than attempting to skip a single dword
and hope that things would magically sort themselves out - they usually
don't, and we end up with PFIFO being completely hung.
This commit also adds somewhat more useful logging when these exceptions
occur.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com >
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e071f8cd71