[Nouveau] [Patch] reenable fifos if we get an error while fifos disabled

[matthieu castet]

Stephan Schmid wrote:
> Hello,
> while playing around with multiple fifo contexts I got fifo hangs when 
> opening glxgears nr.3.
> The reason is that in drm/linux_core/nouveau_fifo.c l.342 
> engine->graph.create_context() returns -ENOMEM (I dont know why but I 
> think this problems also appears with other errors).
May be because of hash collision. I got similar failure, but I didn't 
take time to investigate.


> But the real problem is that then nouveau_fifo alloc() returns without 
> reenabling fifo execution, so all fifos hang. With this patch glxgears 
> nr.3 only prints scary messages and falls back to software rendering.
Great.
May be using a goto to jump at the end, could avoid code duplication.


Matthieu