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drm/i915: Mark up nested spinlocks 

When we process the outstanding requests upon banning a context, we need
to acquire both the engine and the client's timeline, nesting the locks.
This requires explicit markup as the two timelines are now of the same
class, since commit a89d1f921c ("drm/i915: Split i915_gem_timeline into
individual timelines").

Testcase: igt/gem_eio/banned
Fixes: a89d1f921c ("drm/i915: Split i915_gem_timeline into individual timelines")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Michel Thierry <michel.thierry@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180512084957.9829-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2018-05-12 09:49:57 +01:00
parent 4db518e4e8
commit 0c591a40af
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/i915_gem.c
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@ -3119,7 +3119,7 @@ static void engine_skip_context(struct i915_request *request)
GEM_BUG_ON(timeline == &engine->timeline);
spin_lock_irqsave(&engine->timeline.lock, flags);
spin_lock(&timeline->lock);
spin_lock_nested(&timeline->lock, SINGLE_DEPTH_NESTING);
list_for_each_entry_continue(request, &engine->timeline.requests, link)
if (request->ctx == hung_ctx)