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drm/i915: Make __engine_unpark() compatible with ww locking.

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Take the ww lock around engine_unpark. Because of the
many many places where rpm is used, I chose the safest option
and used a trylock to opportunistically take this lock for
__engine_unpark.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210323155059.628690-28-maarten.lankhorst@linux.intel.com
This commit is contained in:
Maarten Lankhorst 2021-03-23 16:50:16 +01:00 • committed by Daniel Vetter
parent 5ace5e9618
commit b51ed60e60
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/i915/gt/intel_engine_pm.c
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@ -27,12 +27,16 @@ static void dbg_poison_ce(struct intel_context *ce)
int type = i915_coherent_map_type(ce->engine->i915);
void *map;
if (!i915_gem_object_trylock(obj))
return;
map = i915_gem_object_pin_map(obj, type);
if (!IS_ERR(map)) {
memset(map, CONTEXT_REDZONE, obj->base.size);
i915_gem_object_flush_map(obj);
i915_gem_object_unpin_map(obj);
}
i915_gem_object_unlock(obj);
}
}