drm/i915: Keep one request in our ring_list

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Don't pre-emptively retire the oldest request in our ring's list if it
is the only request. We keep various bits of state alive using the
active reference from the request and would rather transfer that state
over to a new request rather than the more involved process of retiring
and reacquiring it.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180503195115.22309-2-chris@chris-wilson.co.uk

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Chris Wilson 2018-05-03 20:51:15 +01:00

parent 3365e2268b

commit 7c572e1bdf

1 changed files with 3 additions and 3 deletions

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drivers/gpu/drm/i915/i915_request.c

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