A collection of patches to simplify the creation, use, and destruction
of the driver's global default context.
The first two simplify the many places where the code treats the
global default context differently from any other context:
[1/6] drm/i915: mark the global default (intel_)context as such
[2/6] drm/i915: simplify testing for the global default context
Then we hide the use of the global-default-context from callers who
don't need to know how non-batch-related requests are implemented
internally:
[3/6] drm/i915: simplify allocation of driver-internal requests
And get rid of the multiple references to the default context, one
from each engine (but all pointing to the same structure). This
allows the refcount and the number of references to match!
[4/6] drm/i915: abolish separate per-engine default_context
Finally, fix some incorrect failure paths and tidy up the
corresponding teardown code:
[5/6] drm/i915: tidy up initialisation failure paths (legacy)
[6/6] drm/i915: tidy up initialisation failure paths (GEM &
These should make subsequent reorganisation of other startup/teardown
code easier and safer.
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